U.S. patent number 3,627,367 [Application Number 04/869,304] was granted by the patent office on 1971-12-14 for tool for removing and applying connectors.
This patent grant is currently assigned to Burndy Corporation. Invention is credited to Sidney Levy.
United States Patent |
3,627,367 |
Levy |
December 14, 1971 |
TOOL FOR REMOVING AND APPLYING CONNECTORS
Abstract
A tool for swiftly applying a connector such as a terminator, to
a contact bushing on a transformer and for also removing the
terminator. A push or pull firing piece can be moved into one or
the other of opposed end positions in the casing in which it is
locked by a detent while a spring is compressed against the firing
piece. When the detent is moved by a trigger, it releases the
firing piece for swift movement by the spring. The firing piece
will move either to remove the terminator from the contact bushing
or to apply the terminator to the bushing depending on its locked
position and the compression of the spring. The firing piece
carries a gripper which is movable by a hand grip on the casing for
gripping the terminator to the firing piece, and for releasing the
terminator from the firing piece.
Inventors: |
Levy; Sidney (Norwalk, CT) |
Assignee: |
Burndy Corporation
(N/A)
|
Family
ID: |
25353300 |
Appl.
No.: |
04/869,304 |
Filed: |
October 24, 1969 |
Current U.S.
Class: |
29/747; 294/174;
29/762; 124/31; 294/116; 29/244; 81/3.8 |
Current CPC
Class: |
H01R
43/26 (20130101); Y10T 29/53274 (20150115); Y10T
29/53796 (20150115); Y10T 29/53209 (20150115) |
Current International
Class: |
H01R
43/26 (20060101); B25b 027/14 (); B23p
019/04 () |
Field of
Search: |
;29/23DT,23R,23H,206,244,23D ;32/61 ;43/6 ;81/3.8 ;124/31
;212/55,127,129 ;294/19,16,88,116 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Blunk; Evon C.
Assistant Examiner: Carson; W. Scott
Claims
I claim:
1. In a combination of the class described, a movably mounted
firing piece, detent means for locking said firing piece against
movement in either of opposed directions, spring power means for
moving said firing piece in either of said opposed directions, and
means for releasing said detent means whereupon said power means
moves said firing piece in one of said opposed directions.
2. In the combination of claim 1, the feature that said detent
means locks said firing piece in either of two opposed positions,
and said power means moving said firing piece in one direction from
one position and in an opposed direction from the other position
when said firing piece is released.
3. In the combination of claim 2, the feature that said power means
are spring means movable bodily with said firing piece into two
opposed positions, and means for moving a portion of said spring
means when said firing piece is in either one of said opposed
positions to predispose said spring means to project said firing
piece toward the other one of said opposed positions.
4. In the combination of claim 1, the feature that said spring
means is a compression spring lying between opposed end surfaces of
said firing piece, and means for compressing said spring against
one or the other of said end surfaces.
5. In the combination of claim 4, the feature that said detent
means locks said firing piece against movement by said spring as
said spring is being compressed.
6. In the combination of claim 5, the feature that said detent
means is a single detent coacting with spaced parts of said firing
piece for locking it in either of two opposed positions as said
spring is compressed against one or the other of said end
surfaces.
7. In the combination of claim 1, the feature that said firing
piece is slidably mounted within a tubular casing, a rod extending
through said firing piece, means for sliding said rod relatively to
said firing piece, and a terminator gripper movable by the sliding
of said rod relatively to said firing piece.
8. In the combination of claim 7, the feature that said means for
sliding said rod relatively to said firing piece is a cam mechanism
that holds said rod to said firing piece for movement therewith
when said firing piece is actuated.
9. In the combination of claim 7, the feature that the end of the
tubular casing in which the terminator gripper moves is transparent
so that the gripper may be observed.
10. In the combination of claim 1, the feature that said firing
piece is slidable within a tube or the like and is formed generally
as a cylindrical member with spaced shoulders between which is
positioned a compression spring whereby said spring and firing
piece slide together in said tube between predetermined positions,
said detent locking said firing piece coacting with spaced portions
of said cylindrical firing piece for locking it in either of said
predetermined positions in said tube, and means mounted on said
tube for coacting with either end of said compression spring for
compressing said spring against one or the other of said shoulders
when said firing piece is locked in one of said predetermined
positions whereby said firing piece will be moved by said spring in
one direction from one of said predetermined positions when
released from said detent means.
11. In the combination of claim 10, the feature that said detent is
a ball movable against one or the other of spaced locking surfaces
on said firing piece, and said means for releasing said detent
means presenting an opening to said ball into which said ball moves
for releasing said firing piece.
12. In the combination of claim 10, the feature that a rod extends
through a central opening in said firing piece, means for sliding
said rod relatively to said firing piece, and a terminator gripper
movable by the sliding of said rod relatively to said firing
piece.
13. In the combination of claim 12, the feature that said means for
sliding said rod relatively to said firing piece is a cam mechanism
that secures said rod to said firing piece for movement therewith
when said firing piece is actuated by said spring.
14. In the combination of claim 12, the feature that said means for
sliding said rod is a handpiece rotatably mounted on said tube, cam
mean rotatably mounted on said rod rotated by said hand piece, and
cooperating cam means on said firing piece coacting with said cam
means on said rod for sliding said rod relatively to said firing
piece and locking said rod in effect to said firing piece for
movement with said firing piece by said power means.
15. In the combination of claim 1, the feature that said casing is
tubular, one end of the casing being open and formed of transparent
material whereby the end of said firing piece lying in said one end
of the casing is visible.
16. In a combination of the class described:
a tubular casing;
a generally cylindrical firing piece mounted for slidable relative
movement within said casing and having a central opening for a
rod;
a rod slidably mounted within said opening in said firing piece for
relative motion thereto;
a gripper coupled to said rod for movement between a gripping
position and an open position upon motion of said rod relative to
said firing piece;
a handpiece movably mounted to said casing;
means slidably coupling said handpiece, said rod and said firing
piece for moving said rod into a fixed position relative to said
firing piece;
a detent means for locking said firing piece against movement
relative to said casing; and
power means for moving said firing piece relative to said casing
while said rod remains in fixed position relative to said firing
piece, upon release of said detent means.
17. In the combination of claim 16, the feature that said rod is
connected to said firing piece by cam mechanism including an
operating part rotatable on said rod and movable bodily axially
therewith, relatively to a part of said cam mechanism forming part
of said firing piece, whereby rotation of said operating part
relatively to said firing piece moves said operating part and rod
endwise of said firing piece to actuate said gripper, and means
whereby said hand piece rotates said operating part.
Description
BACKGROUND OF INVENTION
This invention relates to a tool to be used in applying and
removing one electrical device from electrical engagement and
contact with a second electrical device. The tool is particularly
adapted to bring about the assembly or disassembly of two
electrical devices such as connectors between which a high voltage
electric current is to flow when the devices are assembled.
Obviously, in order to bring about the engagement and disengagement
of the devices, their movement relatively to one another should be
swift in order to prevent serious arcing. The tool of my invention
is particularly adapted for the purpose of bringing an elbow type
of connector, known as a terminator, into assembled relation to a
terminal bushing such as is found in a transformer. My invention
provides a very simple and effective mechanism for moving the elbow
swiftly out of engagement with the bushing, and also, to bring the
elbow swiftly into engagement with the bushing, when that is
required.
PRIOR ART
So far as I know, no inventor working in this art has provided a
power mechanism for effecting either swift engagement or swift
disengagement of a bushing such as found on a transformer, and an
elbow to be fitted on the bushing or to be removed therefrom.
OUTLINE OF INVENTION
My invention contributes a very simple mechanism that is operable
both for applying an elbow terminator to the bushing of a
transformer, and for removing the elbow from the bushing. Each
operation is carried out at relatively high speed through use of a
power mechanism that I prefer shall take the form of a spring. As a
feature of the invention, what I term a firing piece, is mounted in
a casing, and is propelled by power in either of opposed
directions, so that the same firing piece may be utilized to apply
the elbow to the bushing, or to remove the elbow from the bushing.
As a particular feature of the invention, the firing piece can be
locked, as by detent mechanism, in either of opposed spaced
positions. Obviously, through release of the detent mechanism, as
by a trigger, the firing piece may be propelled in either of
opposed directions. Where a spring is utilized as the power means
for propelling the firing piece, the spring may be stressed in
either of opposed directions by simple mechanism which I prefer
shall be a toggle linkage.
As a further particular feature of the invention, I utilize a
holding rod that is adapted to move relatively to the firing piece
or to be locked to the firing piece for integral movement
therewith. The holding rod, when moved relatively to the firing
piece, either releases or locks to the firing piece, the elbow that
is to be moved by the firing piece.
As a further feature of my invention, I utilize a very novel form
of hand grip for moving the holding rod so as to lock it relatively
to the firing piece, and I mount the hand grip on the casing in
which the firing piece is adapted to slide in either of opposed
directions.
DESCRIPTION OF DRAWINGS
Referring now to the drawings,
FIG. 1 is an elevation of the tool of my invention showing it
applied to a standard form of elbow terminator which is to be
assembled by the tool to a standard form of transformer
bushing.
FIG. 2 is a perspective view of part of a typical transformer
showing a pair of typical bushings to which a pair of elbows are to
be assembled.
FIG. 3 shows an elbow of standard construction assembled to a
bushing, the elbow being shown partially in section.
FIG. 4 is a partial vertical section of the tool of my invention
with certain parts thereof cut away because it is impossible to
show in proper size relationship the various parts in view of the
length of the tool.
FIG. 5 is a view similar to FIG. 4 but showing the firing piece
after it has been fired and moved to the right from its position of
FIG. 4.
FIG. 6 is similar to FIGS. 4 and 5, except that in FIG. 6 the
spring that is utilized to propel the firing piece has been
stressed for moving the firing piece from the position of FIG. 5 to
the left, upon release of the detent mechanism.
FIG. 7 is an enlarged view of the end of the firing piece showing
the transparent positioning shield fixed to the casing of my tool
together with the end of the firing piece and the gripping
jaws.
FIG. 8 is a section taken along line 8--8 of FIG. 7 illustrating
the gripping jaws in release position relatively to an elbow
terminator.
FIG. 9 is a view similar to FIG. 8 but illustrates the manner in
which the gripper jaws are moved by the holding rod of my invention
so as to engage the ring of a terminator elbow for securing the
elbow to the firing joice for integral movement therewith.
FIG. 10 is an exploded section of one end of the tool of my
invention showing the control of the firing piece by trigger and
detent, and also the manner of moving the holding rod relatively to
the firing piece by a handle grip mounted on the casing of the
tool.
FIG. 11 is a view looking downwardly on a part of the tool shown in
FIG. 1, and illustrates the toggle linkage for compressing the
spring that forms the power mechanism for propelling the firing
piece.
FIG. 12 is a partial section and side view of the parts of FIG. 11
showing the linkage when the spring is in a neutral position.
Movement of the toggle linkage to the position of FIGS. 4 or 6,
will now compress the spring for moving the firing piece in either
of opposed directions.
DESCRIPTION OF A PREFERRED MODIFICATION OF THE INVENTION
Referring now more particularly to the drawings, and especially
FIGS. 1, 2 and 3, the tool of my invention is designated generally
by the reference letter T. The casing of the tool is designated
generally by the reference numeral 10, and for ease of manufacture,
it may be made of several parts that are suitably held together by
various means, all as those skilled in the art will appreciate.
Fixed to the casing 10 is a handle 11, and pivoted at 12 on the
handle 11 is a trigger 13, this trigger being used to release the
firing piece for movement in either of opposed directions as will
be made clear presently. A handle grip 14 is suitably mounted on
the casing 10 and as will be explained presently, is utilized for
moving the holding rod relatively to the firing piece so as to
secure the terminator elbow to the firing piece for movement
therewith.
The terminator elbow itself is illustrated in FIG. 3 where it is
designated by reference 15. It is naturally suitably insulated and
contains contacts adapted to engage contacts of the transformer
bushing. No description of the elbow and bushing are here
necessary. It is merely well to know that a contact of the elbow 15
will enter an opening in a standard bushing 16 so as to complete an
electrical circuit.
Referring now to FIGS. 7, 8, and 9 as well as FIG. 1, it will be
seen that the elbow 15 is adapted to be inserted into what I term a
positioning shield that is designated by reference numeral 20. This
shield is secured through a part 21 to the casing 10 as is probably
best shown in FIGS. 8 and 9. The positioning shield will preferably
be formed of a transparent material that is nonconducting. As a
matter of fact, it will be appreciated that the entire instrument
of my invention must be formed so as not to conduct electricity.
Since, as already indicated, the suitable designing of the parts
for this purpose and for fabrication is something that can be done
by anyone skilled in the art, further reference will not be made as
to the types of material required or utilized by me in the
invention.
In any event, it is important to know that the positioning shield,
which is transparent, is integral with the casing 10 of the tool.
The elbow 15, as is probably best illustrated in FIGS. 1 and 8, is
inserted into the positioning shield 20 with a ring 23 thereof in a
position for acceptance by a pair of grippers 24. These grippers 24
enter the opening 25 of the ring 23 as probably best illustrated in
FIG. 9 and secure the elbow 15 to the firing piece as will be
described.
Each of the grippers 24 is pivoted at 26 to a part 27 that is
integral with what I term a holding rod 28. This holding rod 28 is
movable longitudinally relatively to the firing piece of my
invention designated generally by the reference letter F. This
firing piece F may be assembled of several parts, but does have a
central bore or opening through which the holding rod 28 extends,
for the purposes to be set forth presently. In any event, in so far
as I have already described the invention, the longitudinal
movement of the holding rod 28 relatively to the firing piece F
will bring about movement of the part 27 from its position of FIG.
8 to its position of FIG. 9.
At the end of the firing piece F there is an open mouthed part 29,
which, as best illustrated in FIG. 7, is formed with two slots 30
located 180.degree. apart. As illustrated in FIG. 8, the two jaws
24 move in these slots, a spring 31, best seen also in FIG. 8,
being adapted to hold the jaws in their separated position shown in
FIG. 8 when the holding rod 28 is in an outward left position
relatively to the firing piece F. When the holding rod is moved to
the right from its position of FIG. 8 to its position in FIG. 9
longitudinally relatively to the firing piece F, it obviously moves
the jaws 24 therewith and relatively to the part 29. The jaws 24
are then cammed by the end surfaces 32 of the slots 30, so as to be
brought into the position of FIG. 9. This movement of the jaws 24
brings about the gripping of the ring 23 of the elbow 15, and
obviously secures the elbow 15 to the firing piece F, through the
part 29 that is integral with the firing piece. I shall presently
describe the manner in which the holding rod 28 is moved
longitudinally relatively to the firing piece F for the purpose of
securing elbow 15 through its ring 23 and jaws 24 to the firing
piece F, and also for releasing it by reverse motion.
Referring now to FIGS. 1 and 10, it will be noted that the handle
grip 14 is formed with a cutaway bearing portion 35 through which
it rotates relatively to a part 36 that through threads 37 is
secured to the casing 10 of the tool. A rubber bumper 38 is forced
into the open end of the grip 14 and naturally protects the tool as
those skilled in the art will appreciate. A pin 39 secures to the
hand grip 14 a sleeve 40 that is slotted at 41. Fitted into the
slot 41 is a pin 42 that is integral with a rotating cylindrical
block 43. The cylindrical block 43 is mounted for rotation within a
sleeve 44 that is integral with the firing piece F. Thus, in FIG.
10, sleeve 44 is shown secured to another part of the firing piece
F through screw threads 45. As was earlier set forth, it is only
necessary to know that the firing piece F, as well as the casing 10
of my tool are formed of a series of parts suitably assembled in
manner to contribute an effective insulated operating
mechanism.
The sleeve 44 has a helical slot 47 within which fits the pin 42
integral with the cylindrical block 43. The firing piece F, as will
be presently set forth, is not permitted to rotate within the
casing 10, although naturally, it is adapted for sliding movement
in order to carry out its firing function. Because the firing piece
F is not rotatable in the casing 10, the sleeve 44 integral
therewith will also not rotate, so that the helical slot 47 will be
stationary. Upon rotation of the handgrip 14, the pin 42 will be
rotated with the handgrip because it fits also in the slot 41 of
the part 40 fixed to the hand grip. This rotation of the pin 42
will cause it to move in the helical slot 47 of the sleeve 44, and
this movement will naturally bring about longitudinal movement of
the cylindrical block 43 which is adapted to rotate with the pin
42. The cylindrical block 43 is bored at 53 to rotate on holding
rod 28 between an end surface 50 of the holding rod 28 as shown in
FIG. 10, and a disc 51 secured to the end of the holding rod 28 by
a bolt 52. During rotation of the block 43 relatively to the rod
28, the longitudinal movement of the block 43 by pin 42 will
obviously move the rod 28 back and forth relatively to the firing
piece F.
The longitudinal movement of the rod 28 relatively to the firing
piece F thus described with regard to FIG. 10, will obviously cause
the back and forth movement of the rod 28 described earlier with
regard to FIGS. 7, 8 and 9. This movement of the rod 28 will
naturally secure the elbow 15 to the firing piece or will release
the elbow 15 from the firing piece. It will also be appreciated
that in all positions of the holding rod 28 relatively to the
firing piece, it will be locked by the pin 42 lying in the helical
slot 47 relatively to the locking piece. Therefore, the rod 28 will
at all times move with the firing piece F, except when rotation of
the handgrip 14 effects rotation of the block 43 through the pin 42
for moving the holding rod 28 relatively to the firing piece F.
Thus, it will now be understood that while the holding rod 28 may
move longitudinally relatively to the firing piece F for the
purpose of securing the elbow 15 to the firing piece, the rod 28
and firing piece will move together at all other times to cause
movement of the elbow 15 on and off relatively to a bushing 16
shown in FIGS. 2 and 3.
I shall now describe the means for propelling the firing piece in
one direction or the other, depending upon whether or not the elbow
is to be removed or applied to a bushing 16. Referring now to FIGS.
4, 5, and 6, the firing piece F is well illustrated, and also well
illustrated is the holding rod 28 lying in a central bore in the
firing piece F. The helical slot 47 formed in the sleeve 44 is also
well shown in FIGS. 4, 5, and 6, and in those figures I also show
the block 43 rotatable relatively to the rod 28 while moving the
rod 28 endwise relatively to the firing piece.
Firing piece F, as clearly shown in FIGS. 4, 5, and 6 is formed
with a firing shoulder 60 at the left end of a portion 62 thereof
of decreased diameter, and with a firing shoulder 61 at the other
end of said decreased diameter portion. Shown slidably mounted on
the said relatively smaller section 62 of the firing piece are
opposed rings 63 and 64. A compression spring 65 fits on the
portion 62 of the firing piece F and presses at its opposed ends
against the rings 63 and 64. The spring 65 is of sufficient size,
so that when allowed to expand to its normal position, it will hold
the ring 63 against the shoulder 60, and ring 64 against the
shoulder 61 of the firing piece F.
A spring compressing slide 66 moves in a slot 67 formed in the
casing 10 as well seen in FIGS. 4, 5 and 6. A sleeve 68 is secured
to slide 66 and has at one end an inwardly projected ring 69 and at
its other end an inwardly projected ring 70. It is obvious that the
ring 69, as shown in FIG. 5, will, in the expanded position of the
spring 65, lie against the outer right-hand surface of the ring 64
while the ring 70 will lie against the outer left hand surface of
the ring 63. It is further obvious that movement of the slide 66
will be adapted to applied pressure to the spring 65 through
certain of the rings set forth so as to compress the spring 65
toward the right or the left, depending on the movement of the
slide 66 and sleeve 68. The control of spring 65 and the operation
of firing piece F will be set forth in more detail presently.
Formed integrally with the firing piece F is a detent coacting
portion 73. This detent coacting portion 73 has at each end a very
small rounded shoulder, the shoulder at the left end in FIG. 4
being designated by reference numeral 74, while the shoulder at the
right hand end is designated by reference numeral 75. Referring now
to FIG. 10, it will be noted that the rounded shoulder 75 at the
right hand end of the part 73 of the firing piece F will lie
against balls 76. Actually, the rounded shoulder 75 is circular,
and there will be a series of balls 76 coacting with this shoulder
75. The balls 76 lie in a circular slot formed in a part 77 that is
integral with the casing 10. As seen in FIG. 10, there is a space
between a portion of part 77 and the casing 10 for the mounting of
a sliding sleeve 79, a coil spring 80 pressing the sleeve 79 toward
the right into the position of FIG. 10 against an end surface of
the part 77. Spring 80 is maintained under compression by a spring
ring 81 that is held assembled to the part 77 and, therefore,
integral with casing 10.
The part 79 is in the form of a sleeve, having a holding surface 82
that lies normally against the balls 76 as shown in FIG. 10, to
prevent the balls from moving relatively to the part 77. When so
held, the balls 76 will obviously prevent the shoulder 75 and
detent coacting part 73 from moving to the right from its position
in FIG. 10, and also from movement to the right from its position
of FIG. 4. The part 79 is adapted for movement by the trigger 13,
which, as will be remembered from FIG. 1, is pivoted at 12
relatively to the handle 11. Obviously, upon movement of the
trigger 13 about its pivot 12, a pin 84 secured to the trigger as
shown in FIG. 10, will move the part 79 against the pressure of the
compression spring 80. Such movement will bring a cut away surface
85 of part 79 opposite the balls 76, so that the balls will be free
to move away from the rounded shoulder 75 of the part 73 of the
firing piece F. The firing piece will then be propelled by spring
65.
Referring now particularly to FIGS. 11 and 12, I shall describe the
means for moving the slide 66, this being the part that acts to
compress the spring 65 as was described with regard to FIGS. 4, 5,
and 6. If FIGS. 4, 5 and 6 are examined with relation to FIGS. 11
and 12, it will be noted that the slide 66 is pivoted at 86 to a
handle 87. The handle 87 is pivoted at 88 to a link 89 that is
pivoted at 90 to the casing 10 through handle 11. The handle 87,
pivoted at 86 to the slide 66 and pivoted at 88 to the link 89,
forms with the several parts a toggle mechanism whereby the slide
66 may be moved either to the right or to the left from a normal
central position in which it is placed when the toggle mechanism is
centered. Thus, one extreme position of the slide 66 is illustrated
in FIG. 4. In this position of the parts, the slide 66 has been
moved by the handle 87 through the toggle mechanism described, so
as to move sleeve 68 to propel the ring 63 through ring 70 away
from the shoulder 60 of the firing piece F. This action has
compressed the spring 65 as is clearly shown in FIG. 4, with the
spring holding the ring 64 against the shoulder 61 of the firing
piece. The firing piece F cannot move to the right from its
position of FIG. 4 under the influence of the spring 65 because of
the arrangement of the several locking balls 76 and their coaction
with the rounded shoulder 75, as was fully set forth with regard to
FIG. 10.
If now, in the position of the parts in FIG. 4, the trigger 13 is
pulled, the sleeve 79 will be moved against the action of the
spring 80 bringing the surface 85 opposite the several balls 76.
These balls will now move away from the shoulder 75 and this will
release the firing piece for movement to the right from its
position of FIG. 4 to its position of FIG. 5. Obviously, the spring
in FIG. 5 has brought about a swift movement of the firing piece
from its position of FIG. 4. This movement has naturally moved the
part 29 fixed to the firing piece F as shown in FIG. 5, and this
has brought about the movement of the elbow 15 away from its
assembled relation to the bushing 16 illustrated in FIG. 3.
Let us say now that with the parts in position of FIG. 5, it is
desired to assemble an elbow to a bushing. The elbow will be
inserted into position in the transparent shield 20, as shown in
FIG. 8, this being accomplished after the handle grip 14 has been
rotated in order to rotate the pin 42, and through the helical slot
47 move the holding rod 28 endwise to its position of FIG. 8.
Thereafter, reverse movement of the grip 14 will cause the pin 42
to move in a reverse direction relatively to the helical slot 47
and this will move the holding rod 28 to the right from its
position of FIG. 8 to its position of FIG. 9 so as to cause jaws 24
to grip the elbow 15 as is well illustrated in FIG. 9. The operator
now must make certain that the trigger 13 is restored from its
position of FIG. 5 to its position of FIG. 6 and also its position
of FIG. 10, in which position the balls 76 are placed in locking
relation to the shoulder 74 of the firing piece F. It will be
remembered that when the firing piece moves to the position of FIG.
5, the shoulder 74 will move into detent relation relatively to the
balls 76. Thus, locking balls 76 constitute a detent mechanism
which will now hold the firing piece F in its position of FIG. 6
against movement to the left.
The handle 87 is now moved from its position of FIG. 4 and FIG. 5
to its position of FIG. 6. This will cause movement of the slide 66
to the left of its position of FIG. 5, and the sleeve 68 moving
with the slide 66 will cause the ring 69 integral therewith to move
the ring 64 mounted about the firing piece section 62. This
movement of the ring 64 will compress spring 65 so that the spring
will react against the ring 63, and will press the said ring 63
against the shoulder 60 of the firing piece. This is actually the
relationship of the parts in FIG. 6, and it will be obvious that
the firing piece will now be urged to the left to apply the elbow
15 to a bushing 16 of the transformer 17. The firing piece will not
move, however, until the trigger 13 is again moved so that its pin
84 will move the sleeve 79 against the pressure of the spring 80 to
carry the release surface 85 opposite the balls 76 as can well be
understood from FIG. 10. The balls 76 will now move away from the
shoulder 74, and the spring 65 will propel the firing piece F to
the left to effect the assembly of the elbow 15 to a bushing
16.
It will be remembered that I indicated that the firing piece F
while mounted for sliding movement relatively to the casing 10
cannot rotate relatively to that casing 10. In order to prevent
rotation of the firing piece, a stud 91, shown in FIG. 8 extends
into a slot 92 of the firing piece. Obviously, parts operating as
do the stud 91 and the slot 92 may be placed anywhere for holding
the firing piece against rotation while permitting effective
movement under the force of the spring 65.
I shall now summarize the invention so that it will be well
understood. Through utilization of the pin 42 in helical slot 47 of
the sleeve 44 secured to the firing piece F, the holding rod 28 may
be moved endwise relatively to the firing piece to bring about
engagement or disengagement of the grippers 24 relatively to the
ring 23 of an elbow 15. It will also be understood that in all
positions of the pin 42 in the helical slot 47, the holding rod 28
will be locked against endwise movement relatively to the sleeve 44
of the firing piece. Endwise movement of the holding rod 28
relatively to the firing piece can only be obtained by rotation of
the handle grip 14 mounted on the casing and adapted to move pin 42
therewith. It will also be further understood that the sliding of
the slide 66 by the operation of the handle 87 and its associated
toggle parts, will compress the spring 65 either to the left or to
the right so that the firing piece will be moved to the left or to
the right by the release of the several balls 76. These balls coact
with a rounded shoulder 74 or a rounded shoulder 75 on the firing
piece so as to lock the piece for spring firing to the right or to
the left as may be desired, this firing being accomplished upon
release of the balls 76 from the shoulders 74, 75, by operation of
the trigger 13. I believe that with this final summary of the
invention, and with the detailed description presented, those
skilled in the art will fully appreciate my contribution to the
art.
* * * * *