U.S. patent number 3,604,092 [Application Number 04/869,730] was granted by the patent office on 1971-09-14 for connecting tool.
This patent grant is currently assigned to The Dynamic Tool and Manufacturing Company, Inc.. Invention is credited to Robert H. Knickerbocker.
United States Patent |
3,604,092 |
Knickerbocker |
September 14, 1971 |
CONNECTING TOOL
Abstract
There is disclosed a tool for inserting one or two insulated
electrical conductors between one or both slots formed in an
electrical connector by three adjacent fingers extending from a
base. The tool is adjustable so that cavities of two different
widths may be provided, the wider cavity being for insertion of two
wires and the narrower cavity being for insertion of one wire. The
cavities are of sufficient width that when pushed down over the top
of the three adjacent fingers of an electrical conductor, the inner
walls of the cavity contact the outer edges of the electrical
connector.
Inventors: |
Knickerbocker; Robert H.
(Cheshire, CT) |
Assignee: |
The Dynamic Tool and Manufacturing
Company, Inc. (Watertown, CT)
|
Family
ID: |
25354154 |
Appl.
No.: |
04/869,730 |
Filed: |
October 27, 1969 |
Current U.S.
Class: |
29/750; D8/14;
29/650 |
Current CPC
Class: |
H01R
43/015 (20130101); H01R 4/2429 (20130101); H01R
43/00 (20130101); Y10T 29/53222 (20150115); Y10T
29/52 (20150115) |
Current International
Class: |
H01R
4/24 (20060101); H01R 43/00 (20060101); H01R
43/01 (20060101); H05k 013/04 () |
Field of
Search: |
;29/23H,203,2H,23HM,23HC,206 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Eager; Thomas H.
Claims
I claim:
1. A tool for inserting an insulated electrical conductor into one
or both slots of an electrical connector, said slots being provided
by three adjacent resilient fingers extending from a base, which
comprises
a. a handle portion;
b. an elongated shank extending from said handle the end of said
shank being flat;
c. an elongated plate member pivotally mounted on and facing said
shank so that either end of said plate member may be brought into
alignment with the flat end of said shank;
d. the side of said plate member facing said shank having a recess
in each end thereof, said recesses being of less thickness than the
rest of said plate member and of less width than said plate member,
and said recesses being of different width;
e. said recesses defining cavities of different widths when the
different ends of said plate member are aligned with the flat end
of said shank, said cavities being bounded on three sides by said
plate member and on the fourth side by said shank; and
f. means for securing said plate member to said shank in a fixed
position with one or the other end of said plate member aligned
with the flat end of said shank;
whereby the inner walls of said cavities contact the outer edges of
said electrical connector when said connecting tool is used to
insert an insulated electrical conductor therein.
Description
This invention relates to a tool adapted for connecting either one
or two insulated electric wires to a particular type of electrical
connector.
In my application Ser. No. 868,417, filed Oct. 22, l969, entitled,
"Electrical Connectors and Terminal Connecting Block," there is
described an electrical connector of improved construction and a
block of insulating material containing such connectors. The
electrical connectors described in that application comprise three
adjacent fingers extending from a base. When an insulated
electrical connector is inserted between a pair of the fingers, the
insulation is scraped or cut away making the desired contact. Since
there are two pairs of adjacent fingers, either one or two
insulated electrical conductors may be inserted into the connector.
While an insulated electrical conductor may be inserted between
either or both pairs of fingers manually, this procedure is
somewhat time consuming and may be difficult to perform. Thus, when
the installer's hands become moist with perspiration, the insulated
wire has a tendency to slip when it is attempted to force it
between the fingers. Moreover, since the fingers on the electrical
connector are resilient, the outer finger may yield or be pushed
away from the central finger a sufficient amount so that stripping
of the insulation on the electrical conductor is not adequately
accomplished and, therefore, the desired electrical connection may
be defective.
It is an object of this invention to provide a tool which
facilitates the insertion of insulated electrical conductors into
one or both slots of an electrical connector, which slots are
formed by three adjacent fingers extending from a base.
It is another object of this invention to provide a tool which may
be adjusted to provide for the insertion of either one or two
insulated electrical conductors into an electrical connector
comprising three adjacent fingers extending from a base.
These and other objects are attained by the practice of this
invention which, briefly, comprises providing a connecting tool
which is adjustable for inserting an insulated electrical conductor
into either one or both slots of an electrical connector, which
slots are provided by three adjacent resilient fingers extending
from a base. The tool comprises a handle portion and an elongated
shank extending from the handle. The end of the shank furthest from
the handle is flat. An elongated plate member is pivotally mounted
on and facing the shank so that either end of the plate member may
be brought into alignment with the flat end of the shank. The side
of the plate member which faces the shank has a recess in each end
thereof. These recesses are of less thickness than the rest of the
plate member and are of less width than the plate member. Each
recess is of a slightly different width. When the different ends of
the plate member are aligned with the flat end of the shank, the
recesses in the plate member define cavities of different widths,
each cavity bounded on three sides by the plate member and on the
fourth side by the shank. There is also provided means for securing
the plate member to the shank in a fixed position with one or the
other end of the plate member aligned with the flat end of the
shank. The cavities are of such width that they will contact the
outer edges of the electrical connector when either one or two
wires are to be inserted therein. The narrower cavity is used with
one wire and the wider cavity is used with two wires.
In use, an insulated electrical conductor is placed at the entrance
to one or both of the slots provided by the three adjacent
resilient fingers and the connecting tool is adjusted to provide
the appropriate cavity. The tool is then placed over the top of the
electrical connector and the tool is pushed down. The top end of
the connector projects into the cavity and the sides of the cavity
cause the insulated electrical conductor to be pushed down into the
slot or slots. At the same time the outer edges of the connector
make contact with the inner walls of the cavity, thereby preventing
the fingers from spreading sufficiently so that they would not
strip the insulation.
The invention will be more particularly described with reference to
the accompanying drawings wherein:
FIG. 1 is a front elevational view of a connecting tool constructed
according to this invention;
FIG. 2 is a side elevational view of the tool shown in FIG. 1;
FIG. 3 is a rear elevational view of the tool shown in FIG. 1 and
showing the plate member rotated 45.degree. from its original
position;
FIG. 4 is a perspective view showing the use of the connecting tool
with electrical connectors in a block;
FIG. 5 is a fragmentary sectional view showing the tool being used
to insert two electrical conductors into an electrical
connector;
FIG. 6 is a fragmentary sectional view showing the tool being used
to insert one electrical conductor into an electrical
connector;
FIG. 7 is a view taken along line 7--7 of FIG. 5.
Referring more particularly to the drawings, there is shown a
connector 10 having a handle 11. Extending perpendicularly from the
handle 11 is a shank 12. The shank 12 is an elongated rectangular
thin member which terminates in a flat end 12a. Pivotally mounted
on the shank 12 is an elongated plate 13. The plate 13 is slightly
shorter than the shank 12 and is secured to the shank 12 by a screw
14. The screw 14 passes through the middle of the plate 13 so that
when the screw is loosened, the plate 13 may be pivoted 180.degree.
. The length of the plate 13 is such that either end thereof may be
brought into alignment with the flat end 12a of the shank 12. The
side of the plate member 13 which faces the shank 12 contains
recesses 13a and 13b in each end thereof. These recesses are of
less thickness than the main portion of the plate 13 and are
bounded on the bottom and both sides by the normal thickness of the
plate.
The plate 13 also has notches 15a and 15b immediately below the
recesses 13a and 13b. The shank 12 has a protuberance which
registers with one of the notches 15a or 15b when the end of the
plate 13 is brought into alignment with the flat end of the shank
12. When the screw 14 is tightened, the protuberance 16 extends
into the notch 15a or 15b and holds the plate 13 in a fixed
position.
When the end of the plate 13 is brought into alignment with the
flat end 12a of the shank 12, the end of the tool defines a cavity
17. The cavity is bounded on three sides by the back and the two
sides of the plate member 13 and on the fourth side by the shank
12. The width of the cavity will depend upon which recess 13a or
13b is forming the cavity.
The use of the connecting tool of this invention is illustrated in
FIGS. 4-7. FIG. 4 shows a plurality of electrical connectors 20
inserted in a block 21 of electrical insulating material. As shown
more clearly in FIGS. 5 and 6, the connector 20 comprises a flat
base portion 22 and three contact fingers projecting from the base
portion. The fingers include a symmetrical central finger 23 and
two outer fingers 24. The connector is constructed of a suitable
resilient conducting material such as phosphor-bronze
When it is desired to make an electrical connection between the
connector and an insulated electrical conductor, an insulated
electrical conductor is placed at the entrance to one or both of
the slots formed by the outer fingers 24 and inner finger 23. If
two wires are to be inserted, as shown in FIG. 5, the end of the
plate 13 having the wider recess 13a or 13b is aligned with the end
portion of the shank 12. The top ends of the fingers 23 and 24 are
inserted into the cavity 17 of the connecting tool and the tool is
pushed down. The cavity 17 is of such width that the outer fingers
24 of the connector 20 make contact with the inner walls of the
cavity 17. This prevents the fingers from spreading outwardly and
insures crushing or cutting of the insulation 31 when the
electrical conductor 30 is pushed down between the fingers.
Continued forward movement of the installing tool and of the
insulated conductor results in shearing of the insulation 31 and
the bare conductor wire 32 is scraped against the inside wall of
the fingers, thus creating a good electrical contact.
When only one wire is to be inserted into the connector, as shown
in FIG. 6, the end of the plate 13 having the narrower recess is
brought into alignment with the end of the shank 12, the insulated
electrical conductor is placed at the entrance between one of the
outer fingers and the central finger and the electrical conductor
is pushed down thereon as previously described. Since there is only
one wire being introduced, and since the cavity 17 is narrower than
when two wires are being inserted, contact is again made between
the outer fingers 24 and the inner walls of the cavity 17, thereby
preventing the finger 24 from being displaced too far from the
middle finger 23 to adequately strip the insulation.
* * * * *