U.S. patent number 3,666,902 [Application Number 05/068,971] was granted by the patent office on 1972-05-30 for switch system.
This patent grant is currently assigned to Delta Electronics Inc.. Invention is credited to Stephen W. Kershner, Kenneth Owen.
United States Patent |
3,666,902 |
Owen , et al. |
May 30, 1972 |
SWITCH SYSTEM
Abstract
A switch system for connecting any one of a plurality of
transmitters to any one of a plurality of antennas by providing a
base structure on which identical module switch elements, made of
conductive resilient cantilever line sections, are mounted on the
front and back of a base to provide continuous vertical line
conductor elements on the back connected to transmitter terminals
and provide continuous horizontal line conductor sections on the
front connected to antenna terminals, rotatably mounted rotors
having flat conductive cam sections at right angles to each other
engage the cantilevers and cross connect any one of the transmitter
lines to any one of the crossing antenna lines. Each module
includes a face plate carrying an insulator supporting a pair of
resilient conductive cantilever line sections embracing the cam
sections of the rotor to connect with similar resilient conductive
cantilever sections for line continuing relation or for cross
connection by the cooperating rotatably mounted rotors insulatingly
supported.
Inventors: |
Owen; Kenneth (Springfield,
VA), Kershner; Stephen W. (Falls Church, VA) |
Assignee: |
Delta Electronics Inc.
(Alexandria, VA)
|
Family
ID: |
22085875 |
Appl.
No.: |
05/068,971 |
Filed: |
September 2, 1970 |
Current U.S.
Class: |
200/504; 200/6R;
200/175 |
Current CPC
Class: |
H01P
1/125 (20130101) |
Current International
Class: |
H01P
1/12 (20060101); H01P 1/10 (20060101); H01h
063/00 (); H01h 019/36 () |
Field of
Search: |
;200/6R,6BC,6C,175,178,179,153S,155,1R,5R ;335/138 |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
|
|
|
|
|
|
|
1,212,854 |
|
Mar 1960 |
|
FR |
|
805,684 |
|
Dec 1958 |
|
GB |
|
Primary Examiner: Schaefer; Robert K.
Assistant Examiner: Vanderhye; Robert A.
Claims
We claim:
1. A switch system comprising a base, first leaf spring section
conductors insulatingly supported from said base and arranged in
end-to-end overlapping relation forming first lines insulatingly
supported from the front of said base, second leaf spring section
conductors insulatingly supported from said base and arranged in
end-to-end overlapping relation forming second lines insulatingly
supported on the back of said base and extending transversly to and
crossing the first lines, rotatable conducive elements supported
from said base and overlapping the front and back crossing lines
and selectively engageable with the copperating leaf spring section
conductors moving the free ends of the copperating leaf spring
section conductors from the adjacent leaf spring section conductors
and cross-connect the lines on the front to the lines on the
back.
2. The invention according to claim 1 in which the base is a plate
having apertures receiving the rotatable conductive element and
partitions are arranged in parallel relation to said lines and
apertured face plates are secured to said partitions substantially
parallel to said base and rotatably support the rotatable elements
and also carry insulators on which the leaf springs are
mounted.
3. The invention according to claim 2 in which a manual operating
knob is provided on one end of the rotatable conductive
element.
4. The invention according to claim 3 in which a power means and a
control switch is mounted on the other end of said rotatable
conductive element.
5. The invention according to claim 2 in which the rotatable
conductive element has a body with a first pair of tines in one
plane extending forwardly of the body and a second pair of tines in
a plane transverse to said plane of the first pair of tines
extending rearwardly and an insulator is mounted between each pair
of tines to rotatable support the rotatable conductive element.
6. The invention according to claim 1 in which a leaf spring
section is provided on each side of the rotatable conductive
element to provide equal radial pressure to the opposite sides of
the rotatable conductive element preventing unbalanced forces.
7. A switch nodule for application to a base support having
crossing channels comprising a pair of face plates, an insulator
mounted on each face plate, a pair of leaf spring sections mounted
on each insulator adjacent one end of the leaf springs leaving
cantilever portions at the other ends, a rotatable cam shaped
conductive element having a body with tines extending in opposite
directions positioned between said cantilever portions of said leaf
springs, shaft insulators mounted in the tines of said cam shaped
conductive element and serving as shafts, said shaft insulators
being rotatably supported in aperture in said face plates.
8. The invention according to claim 7 in which a knob shaft
extension projects outwardly from the free end of one of the
insulators serving as a shaft and a manual operating knob is
mounted on said knob shaft.
9. The invention according to claim 7 in which a power operated
rotary solenoid is operatively connected to one end of one of the
insulators serving as a shaft for rotating the rotatable conductive
element to crossconnect the cooperating leaf spring sections or to
open the circuit between the crossing leaf spring sections.
10. The invention according to claim 7 in which a manual operating
knob is mounted on the free end of one of the insulators serving as
a shaft and a switch is mounted on the free end of the other
insulator serving as a shaft.
11. The invention according to claim 1 in which grounding leaf
springs are supported from said base and engage the rotatable
conductive element when the leaf spring sections are in line
continuing position.
12. A switch module comprising a face plate having a shaft
receiving aperture therethrough, an insulator secured to one edge
of said face plate, a pair of cantilever line section springs
positioned on opposite sides of the axis of said shaft receiving
apertures and mounted adjacent one end on said insulator, said
cantilever springs having ends projecting beyond the adjacent edge
of the face plate for overlapping cooperation with cantilever
springs on adjacent face plates, a rotatable conductive element
having conductive portions between said cantilever springs, an
insulator shaft extending from said rotary conductive element and
rotatably mounted in the shaft receiving aperture of said face
plate, means to rotate said insulator shaft whereby a multiple line
switch system may be provided by mounting the modules with the
cantilever springs in registering overlapping relation to produce a
switch system of any desired size.
13. The invention according to claim 12 in which a base and
partition supports are provided for mounting the modules on
opposite sides of a base so that lines may be provided extending in
one direction on one side of said base and lines may be provided
which extend transversely on the other side of said base and said
rotary conductive elements provide for cross-connections between
the lines on both sides of said base.
14. The invention according to claim 12 in which a pair of tool
receiving apertures for receiving the legs of a U-shaped member are
provided on the face plate to engage and spread apart the free ends
of the cantilever springs so that the face plates may be
assembled.
15. The invention according to claim 13 in which a channel shaped
conductor embraces the fixed ends of the leaf springs at the end
module and is connected to a terminal for connection to an antenna
or transmitter.
16. The invention according to claim 13 in which the rotatable
conductive element has a pair of tines for engagement with the
cantilever line section springs on one side of the base and has a
second pair of tines for engagement with the cantilever line
section springs on the other side of the base.
17. The invention according to claim 16 in which at least one
grounding spring is provided for engaging the rotary conductive
element in its line continuing position.
18. The invention according to claim 13 in which the rotatable
conductive element has tines engageable with the cantilever springs
on one side of the base and another pair of tines extending between
the line section springs on the other side of the base, the
insulator shafts being positioned between the tines of each pair of
tines and an extension shaft projecting from at least one insulator
and means to rotate said extension shaft.
19. The invention according to claim 18 in which a second extension
shaft is mounted on the other end extending from the other
insulator shaft and switch means operated by said second extension
shaft.
20. The invention according to claim 19 in which a rotary solenoid
is provided to operate said second extension shaft and a manual
knob is provided to operate said first extension shaft.
21. The invention according to claim 18 in which an auxiliary plate
is mounted outwardly of the face plate and the extension shaft is
rotatably mounted in the auxiliary plate and retained therein by
spring washers reacting against both faces of the auxiliary
plate.
22. The invention according to claim 21 in which the connection
between the insulator shaft and extension shaft is a slot and pin
whereby the auxiliary plate can be applied subsequently to the
mounting of the face plate.
23. The invention according to claim 22 in which a second auxiliary
plate is mounted outwardly of the other cooperating face plate and
a second extension shaft is rotatably mounted in the second
auxiliary plate.
24. A switch module comprising a first pair of insulatingly
supported spaced apart resilient conductive cantilevers in a first
plane, a second pair of insulatingly supported spaced apart
resilient conductive cantilevers in a second plane generally
parallel to said first plane and spaced from said first plane with
the cantilever pairs in crossing relation, insulatingly supported
conductive abutments cooperating with the free ends of said
cantilevers, a rotatably insulatingly mounted rotor having its axis
transverse to said planes and being embraced by said cantilevers,
said rotor having a first generally flat cam section of a width
greater than the spacing between said first cantilevers and
engageable therewith and having a second generally flat cam section
of a width greater than the spacing between said second cantilevers
and substantially at right angles to said first cam section and
engageable with said second cantilevers, said cam sections being of
conductive material and connected together whereby in one position
of said rotor the cam sections are generally parallel to their
cantilevers and the free ends of the cantilevers engage their
conductive abutments and in the other position of said rotor the
cam sections engage the cantilevers and move the free ends of the
cantilevers out of contact with their conductive abutments and
connect the first pair of cantilevers with the second pair of
cantilevers.
25. The invention according to claim 24, in which a plurality of
switch modules are connected together with the fixed ends of the
cantilevers connected to the abutments of the adjacent module
whereby a switch system of any size can be assembled.
26. The invention according to claim 24 in which grounded springs
engage at least one flat cam section when the cam sections are
parallel to their cantilevers to prevent coupling between the first
and second pairs of cantilevers.
27. A switch system comprising a base, a first leaf spring section
conductors insulatingly supported from said base and arranged in
end to end overlapping relation and providing cantilever portions,
second leaf spring section conductors insulatingly supported from
said base and providing second cantilever portions and arranged in
end to end overlapping relation and crossing said first leaf spring
section conductors, rotatable conductive cam elements insulatingly
supported from said base and overlapping cantilever portions of the
crossing first leaf spring section conductors and the cantilever
portions of said second leaf spring section conductors and
selectively engageable with with the cooperating leaf spring
section conductors from the adjacent leaf spring section conductors
and cross connect the first leaf spring section conductors to the
second leaf spring section conductors.
28. The invention according to claim 27 in which the first and
second leaf spring section conductors extend in lines generally
straight with a minimum of physical discontinuities such as stub
ends.
Description
The present invention relates to a switch system such as that shown
in U.S. Pat. No. 3,223,812 and U.S. Pat. No. 3,500,004 and is
particularly made for connecting any one of a plurality of
transmitters to any one of a plurality of antennas to directionally
direct the signal. The invention more particularly relates to the
connection between coaxial cables in which the center conductor is
shielded by the outer conductor to reduce cross-talk.
Heretofore, various switch systems have been provided, some of
which have depended upon a plunger action to cross-connect crossing
lines in which a plurality of generally parallel horizontal lines
are connected to a number of antennas and a plurality of vertical
crossing lines which are located in a plane spaced from the antenna
lines are connected to transmitters and plunger-like
cross-connecting switches serve to connect the various antenna
lines to the transmitter lines.
An object of the present invention is to provide a switch system
which is relatively inexpensive and overcomes the difficulties of
the prior art.
Another object is to provide a switch system for connecting any one
of a plurality of transmitters to any one of a plurality of
antennas by means of rotatable elements.
Other and further objects will be apparent as the description
proceeds and upon reference to the accompanying drawings,
wherein:
FIG. 1 is a perspective of the switch system showing the
transmitter connection terminals at the top and two of the antenna
connect terminals at the back;
FIG. 2 is a fragmentary section taken on line 2--2 of FIG. 1,
showing the manual and electrical operation structure for the rotor
having cam sections at right angles made of a double fork
conductive element and showing the connection of the middle antenna
line to a coaxial terminal;
FIG. 3 is a diagrammatic perspective with the base and supporting
structure omitted showing the operation of the rotor conductive cam
making connection between transmitter T4 and antenna A2;
FIG. 4 is a fragmentary perspective with parts broken away looking
from the front toward the back showing the spring contacts for
grounding the conductive rotor cam when in inoperative position at
the right and showing the grounding spring out of contact with the
double-forked element in cross-connecting position at the left;
FIG. 5 is a fragmentary perspective of the top left structure and
showing the cross-point between transmitter T1 and antenna A1;
FIG. 6 is a fragmentary section taken on line 6--6 of FIG. 2
showing the grounding spring engaging the rotary cam element in
line continuing inoperative position;
FIG. 7 is a fragmentary detail exploded view showing the
construction of the rotor cam showing the double-forked conductive
element, the insulators supporting the same and the extension
shafts for the manual and rotary solenoid operation.
Referring more particularly to the drawings, a base plate B or main
support is shown as provided with a plurality of switch receiving
openings O extending in horizontal rows and vertical columns for
the rotor cams shown of conductive, double-forked elements S.
Extending horizontally on each side of the horizontal rows of
openings O are I-beams IH, and extending vertically in columns are
a plurality of I-beams IV secured to the base B by any suitable
manner, thereby providing shielded passages for the horizontal
antenna lines at the front and the vertical transmitter lines at
the back. To reduce the number of reference numerals, postscript B
means back and postscript F means front. H and V mean horizontal
and vertical respectively.
Fixed to the outer flanges of the I-beams IH are a plurality of
face plates 10 at the front and at the back. Apertures in the face
plates 10 provide bearings for the counterbored reduced ends of
cylindrical insulator shafts of teflon or other suitable insulating
material 11 which are snugly received in the forked ends of the
rotor cam S of conductive material. The doubly forked rotatable
conductive rotor cam element S includes a pair of forwardly
extending tines S1, S1 and a pair of rearwardly extending tines S2,
S2 forming flat cam sections S1, S1; S2, S2 at right angles to each
other. The rotor cam element is made from a cylindrical conductive
bar which is bored inwardly from each end and then milled to
provide the pairs of tines S1 and S2 of substantially the same
length but the body is milled so that the cylindrical disc portion
S.sub.c is spaced from the inner end of the notch formed by the
tines S1, S1, a greater distance for contacting grounding springs
22A, 22A, hereinafter described, to prevent cross talk by grounding
the rotors S in their inoperative positions. The insulator shafts
11, 11 are held in position by roll pins R passing through aligned
apertures in the shafts 11 and the cooperating tines S1, S1 and S2,
S2, the cylindrical bore formed between the tines serving to snugly
engage the cylindrical insulators 11 to prevent rocking movement
about the pins R. A knob carrying shaft 12 is received in the
counterbore of insulator 11 and is prevented from rotation therein
by a roll pin R passing through a transverse aperture in the knob
shaft 12 and received into a slot 11S in the insulator. A pair of
grooves 12A and 12B receive horseshoe-shaped spring washers 12S on
the front and back of plates 13 mounted on the face plate 10 by
means of spacers 13A. A warped spring washer 12W engages the back
of the plate 13 and a conventional washer is positioned between the
front spring washer 12S and the front of the plate 13 to thereby
maintain the knob receiving shaft 12 against axial movement. A hand
operating knob 14 is mounted on the forward extension of shaft 12
by means of its axial bore which is of a length to space the inner
end of the knob 14 away from the plate 13.
A rearwardly extending shaft 15 is received in the counterbore of
the reduced portion of insulator 11 and held against rotation by a
roll pin R and such shaft 15 is part of a stepping switch 16 of the
rotary solenoid type such as that manufactured by Ledex, Inc.,
Series 312, or any other suitable type, making a complete turn in a
predetermined number of activations such as 12 actuations of the
rotary solenoid 16, for example. The rotary solenoid 16 actuates
the three wafer switches and one switch thereof causes the rotary
solenoid to stop after three steps making a 90.degree. rotation.
Other wafer switches may be used to disconnect and connect the
transmitter and to indicate the position of the particular switch.
Other types of activators may be used to produce the 90.degree.
rotation.
A shaft 17 is shown to operate a two-wafer switch 18 which is
arranged to operate a signal board to indicate the condition of the
particular switch and another wafer is used to control the
transmitter to assure that the transmitter is turned off before the
contacts are made or broken in the particular switch being
operated. A suitable signal board and transmitter control is shown
in the prior patents referred to above.
Each face plate 10 is provided with a bent-over flange 19 to which
is attached an insulator 20 by means of rivets or bolts 20A and
mounted on each insulator 20 are a pair of resilient conductive
cantilevers or leaf spring line sections 21 in a first plane, each
leaf spring having means such as an aperture adjacent one end
receiving a fastener element such as a bolt 21A which extends
through aligned apertures in the leaf spring sections 21, 21 and
secured together with a nut to maintain the cantilever springs in
position. It will be apparent that the cantilever springs may
engage fixed insulatingly supported abutments on the fixed ends 21B
of adjacent line continuing conductive cantilever springs.
The adjacent I-beams IH at the front of the base B are provided
with slots 22 which receive electrically grounded leaf springs 22A
which engage the rotatable conductive cam elements S in the
inoperative position thereof to ground the elements S so that the
conductive rotary element S is grounded in its inoperative position
by the springs 22A, 22A to prevent cross talk. Such springs are
retained loosely in the slot by peening over a portion of the
flange of the I-beam IH and by tapering the ends of springs to be
loosely received in the slots 22 on one or both ends so that such
springs 22A can assume a straight position as shown in dotted lines
in FIG. 6 when the rotatable conductive element is turned to its
operative cross connected position shown in dotted lines.
The springs 22A, 22A ground the rotor S when in line continuing
relation and prevent capacitance coupling between the crossing
lines at the cross over points.
To assemble the switch system, the I-beams IH and IV are mounted on
the front and back of the base B which has previously had openings
O made therein. The insulators 20 are mounted on the face plates 10
and the resilient conductive cantilevers or leaf spring section
conductors 21 are secured to the insulators. The face plates 10
with the insulators and the leaf springs are then mounted in their
proper positions by means of screws or the like. The leaf spring
sections 21 are biased to have their free ends urged together so
that the spacing therebetween is less than the height of the
insulators 20 and therefore the free ends of the springs are closer
than the conductive abutments or fixed ends 21B of the leaf spring
previously mounted. If desired, the cantilever leaf springs may
engage fixed abutments insulatingly supporting the adjacent line
continuing cantilever springs. To provide for assembly, the face
plates 10 are provided with apertures 23 arranged in spaced
relation for receiving a tool such as a U-shaped wire 23S, the
tines of which are spaced apart a sufficient distance to hold the
free ends of cantilever leaf springs 21, 21 of the module separated
so that the module can be assembled by axial movement along shaft
11. The module is held in place by suitable screws such as spacers
13A which have a threaded stud at one end and a threaded bore at
the other end so that the threaded stud of spacer 13A secures the
face plate 10 to a threaded opening in the I-beam while screws 13S
secure the plate 13 in position.
The conductive rotatable element S is assembled with the insulators
11 and secured together by the roll pins R and such unit is
inserted before the back plate 10B is attached with the face plates
10 and 10B providing the bearings for the rotatable elements.
The back face plates 10B are then applied and the U-shaped wire 23
is used to spread the springs 21 as previously described and
thereafter the plate 24 is secured in place by spacers 13A and
screws 13S.
Each leaf spring 21 is secured intermediate its ends in a notch 21C
so that the end 21B curving inwardly acts as a fixed conductive
abutment and lies outside of the notch 21C formed in insulator 20
and is adapted to be contracted by the fingers 21D, 21D formed in
the free end of the leaf spring section 21, dimples 21E being
formed in the fingers 21D, 21D to provide contact projections on
the upwardly curved free ends of the fingers 21D to contact the
fixed abutment formed by the curved stationary end 21B of the
adjacent resilient conductive cantilever leaf spring section
21.
In FIG. 2 a channel shaped conductive extension 25 is secured to
the adjacent insulator 20 and outwardly of the spring sections 21
with a bolt 25A securing the channel 25 to the adjacent leaf spring
sections 21, the channel 25 being connected to a central contact
25B which is supported on a suitable insulator and projects
rearwardly through a clearance opening in the base B to be attached
to a female coaxial extension 25C receiving the contact 25B, an
outer flange connection 25D providing the connection to the
shielding conductor of the coaxial cable, the parts being held
together by suitable bolts 25E. The line sections are effectively
shielded by suitable conductive plates.
In FIG. 5 a connection from the vertical transmitter line T1 shows
a channel member 26 mitered at right angles rearwardly and
connected by a bolt 26A to the adjacent leaf spring section 21 and
insulator 20, a horizontal portion 26B extending rearwardly and
being connected to the center contact 26C for the transmitter T1
which is connected to the central conductor of a coaxial cable, the
outer conductor being secured in position in a manner similar to
that of the member 25D of the antenna connections.
From the above description, it will be apparent that a switching
system has been provided in which any one of a plurality of
transmitters may be connected to any one of a plurality of antennas
by a conductive rotative element having insulator shafts 11 of
Teflon or other suitable insulating material rotatably supported in
face plates 10 with the cantilever leaf spring sections 21 applying
a uniform radial pressure on the rotor S and the insulators 11 in
all positions of the rotatable conductive element S which prevents
objectionable radial forces between the bearing surfaces of the
plate 10 and the reduced portion of the insulators. Some insulating
material such as Teflon takes on a permanent set when subjected to
pressure in one direction, and by having equal radial pressure by
the cantilever springs this pressure in one direction is avoided.
The grounding springs 22A, 22A also produce a uniform balance of
radial pressure.
The manually operated switch 18 and the rotary solenoid operated
switch 16 are secured to the plates 24 by suitable fasteners and
serve to operate an indicator board showing the position of the
particular switch and also having connections which disconnect the
transmitter before the circuit is broken as previously
explained.
The resilient conductive cantilevers or leaf spring sections 21, 21
may be of other shapes such as a rod or the like, with provision to
connect to a similar rod by means of the resiliency of the rod, or
other shapes, to make and break the contact as described above. The
cantilever springs may engage conductive abutments and be supported
on conductive abutments, which conductive abutments are
insulatingly supported on insulators such as 20.
One feature of the invention is the cantilever arrangement of the
springs to provide for the resiliency and the spring biased closing
of the free end of the cantilever with the relatively fixed end of
the adjacent aligned cantilever or abutment. The flow of current
with the cantilever rotor spring sections has two paths with the
coaxial arrangement described in detail and by using the two
fingers formed by the notch between fingers 21D at the free end of
each spring four points of contact for the passage of current are
provided, thereby increasing the efficiency.
A balanced line arrangement may be provided in which the spring
leaf sections 21, 21 on each module are insulated from one another
by having attaching screws threaded into the insulator 20, thereby
avoiding interconnecting the two leaf spring sections in the
module. The rotor cam conductive switching element S is then
arranged to have one tine S1 connected to one tine S2 and such
connections being insulated from the conductive connection between
the other tine S1 and the other tine S2, thereby providing for
cross-connecting the pairs of conductor lines to accomplish a
similar result to that of U.S. Pat. No. 3,500,004.
* * * * *