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Publication numberUS2858382 A
Publication typeGrant
Publication dateOct 28, 1958
Filing dateMay 27, 1957
Priority dateMay 27, 1957
Publication numberUS 2858382 A, US 2858382A, US-A-2858382, US2858382 A, US2858382A
InventorsLehman Harry W
Original AssigneeCollins Radio Co
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Duplex antenna switch
US 2858382 A
Abstract  available in
Images(1)
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Claims  available in
Description  (OCR text may contain errors)

Oct. 28, 1958 H. W. LEHMAN DUPLEX ANTENNA SWITCH Filed May 27, 1957 INVENTOR.

HARRY W LEHMAN A T Teen/2Y8 Unite fitates DUPLEX ANTENNA SWITCH Application May 27, 1957, Serial No. 661,715

4 Claims. (Cl. 200--5) This invention relates to switching mechanisms and more particularly to switching mechanisms especially designed to selectively connect desired coaxial lines.

A plurality of coaxial connectors such as those associated with antennas and receivers, must necessarily be selectively cross-connected at various times. If a pair of antennas is to be selectively connected to a pair of receivers so that either antenna may be connected to either receiver, some switching means is necessary. In the past, such switching means have been either of the rotary type or the sliding type. The switching means must be a coaxial type of switch if coaxial lines are being used,

arent and the switch must provide adequate shielding. The rotary and sliding types of coaxial switches provide this shielding, but do so at the expense of operating convenience and efficiency. In the coaxial type of switch, it is a requisite that the standing wave ratio be kept within prescribed limits and that the amount of interference between the various signals carried by the coaxial lines be kept at a minimum. This invention provides a simple .and novel coaxial switch which effectively meets the above described requisites and yet provides convenience and simplicity in operation and construction.

It is an object of this invention to provide a simple multiple connection coaxial switch. It is a further object of this invention to provide a coaxial switch which may interconnect a plurality of coaxial connectors with a minimum of interference between the signals carried by the various connectors. It is a still further object of this invention to provide such a coaxial switch where the contacts have a desired wiping action and the characteristic impedance of the coaxial lines connected to the coaxial connectors at the switch is substantially maintained.

It is another object of this invention to provide a coaxial switch where the moving parts are maintained under mechanical load conditions during the operation period of the switch, thereby reducing possible erroneous electrical connections due to mechanical vibrations.

These and other objects of this invention will become apparent when the following description is read in conjunction with the accompanying drawing, in which:

Figure l is an exploded isometric view of one embodiment of this invention, and

Figure 2 is a sectional view of this same embodiment of this invention through the plane 22.

Referring now to Figures 1 and 2, the plate 11 is composed of a sheet of non-conductive material having a con ductive surface aflixed to two sides thereof. This nonconductive material and the conductive surfaces afiixed thereto may be constructed in a manner such as any of the well-known printed circuit boards having both sides plated with conductive material. On one side of the plate 11 the plating is interrupted around a plurality of double contacts 12, 14, 16 and 18. One of these double contacts is individually connected to the center connector of one of the plurality of coaxial connectors 13, 15, 17 and 19. The other contacts of the double contacts are each connected to their related contact by a metallic strip 31. The

ice

contact of the double contacts which is not connected to the coaxial connectors passes completely through the plate 11 and forms a single contact on the other side of the plate 11. The plating on the side having the single contact is also interrupted around the single contact.

The coaxial connectors 13, 15, 17 and 19 are mounted on a metallic member, and the center conductor of the coaxial line is passed through the member 32 and is electrically insulated except from the double contacts 12, 14, 16 and 18. The ground connection of the coaxial line is carried to the metallic member 32, and all of the coaxial connectors have their ground connections maintained at the same level through this metallic member 32.

A pair of similar movable contact arm-supporting members 21 and 22 are used to support contact arms or fingers 23. These contact arm-supporting members are made of a non-conductive material, such as tetrafiuoroethylene. The conductive contact arms 23 are attached to the support members 21 and 22 by any of the desired and well-known fastening methods. The contact arms are arranged so that each one makes contact with a different one of the contacts 12, 14, 16 and IS in the plate 11 which are not connected to the coaxial connectors.

Also, attached to these support members 21 and 22 are grounding fingers 26. These grounding fingers effectively ground the contacts to the external members 32 and 33 and thereby reduce the cross-feed on this switch.

An opening 27 of a predetermined shape is cut in the plate 11 and the member 32. A third member 33 made of conductive material completes the external physical configuration of the switch by enclosing contact supporting element 21. Through this opening 27 is passed a specially designed piece or block 25 of non-conductive material to permit movement of the attached contact arm-supporting members only at right angles to the surfaces of the plate 11. Both the contact supporting elements 21 and 22 are connected to this specially designed block 25.

Attached to one of the contact supporting elements 21 and 22 is a non-conductive member, such as screw member 51. This member actuates the movement of the contact supporting elements at right angles to the surfaces of the plate 11 within the limits prescribed by the block 25 and the opening 27.

In operation, the relay 50 would be mechanically connected to this member 51 so that movement of the relay would position either the contact arm-supporting element 21 or 22 against the predetermined fixed contact of the double contacts 12, 14, 16 and 18. Inasmuch as the contact arms 23 on the supporting element 21 are at right angles to the contact arms on the supporting element 22, as the member 51 is moved in-and-out, the connector 13 is connected to either the connector 15 or the connector 17.

Thus, alternating and selective connections between the coaxial connectors is provided. A first antenna and a second antenna, and a first receiver and a second receiver connected to the coaxial connectors 13, 15, 17 and 19 may be connected in any of the desired relationships. The movement of the contact supporting members 21 and 22 by member 51 and relay 51 must be done with a predetermined force so that in each operative position, floating action of the switching elements is prevented. It is obvious that the dimensions of the switching, including the switch pieces 32 and 33, may be varied to fit a desired standing wave ratio. If such changes in dimensions cannot substantially obtain the desired standing wave ratio, changes in pressurization and in the grounding connections of the switch may improve the standing wave ratio.

Although this invention has been described with respect to a particular embodiment thereof, it is not to be is so limited as changes and modifications may be made therein which are Within the full intended scope of the invention as defined by the appended claims.

What is claimed is:

l. A switch means comprising a plate of non-conductive material, said plate being substantially covered by conductive material on both sides, a plurality of fixed contact means extending through said plate and said conductive side surfaces, said fixed contacts being electrically isolated from said conductive surfaces, individual ones of said fixed contacts electrically interconnected on a first side of said plate, a plurality of external connection means electrically connected to predetermined ones of said fixed contacts on the second side of said plate, a plurality of movable contact supporting means, said contact supporting means including a plurality of contact arms where the contact arms attached to a first one of said contact supporting means are at right angles to the contact arms attached to a second one of said contact supporting means, each of said contact arms selectively connecting certain of said fixed contacts, a block of non-conductive material extending through said plate and said conductive surfaces, said contact supporting means aifixed to said block, and means for moving said block and said supporting means at right angles to the sides of said plate whereby a selected one of said contact supporting means and said contact arms associated therewith are in contact with said fixed contacts.

2. A switch means comprising a plate of non-conductive material, said plate being substantially covered by conductive material on both sides, a plurality of fixed contact means extending through said plate and said conductive side surfaces, said fixed contacts being electrically isolated from said conductive surfaces, individual ones of said fixed contacts electrically interconneted on a first side of said plate, a plurality of external connection means electrically connected to predetermined ones of said fixed contacts on the second side of said plate, said external connection means comprising coaxial connectors, a plurality of movable contact supporting means, said contact supporting means including a plurality of contact arms where the contact arms attached to a first one of said contact supporting means are at right an les to the contact arms attached to a second one of said contact supporting means, each of said contact arms selectively connecting certain of said fixed contacts, a block of non conductive material extending through said plate and said conductive surfaces, said contact supporting means aflixed to said block, and means for moving said block and said supporting means at right angles to the sides of said plate whereby a selected one of said contact supporting means and said contact arms associated therewith are in contact with said fixed contacts.

3. A switch means comprising a plate of non-conductive material, said plate being substantially covered by conductive material on both sides, a plurality of fixed contact arms extending through said plate and said conductive side surfaces, said fixed contacts being electrically isolated from said conductive surfaces, individual ones of said fixed contacts electrically interconnected on a first side of said plate, a plurality of external connection means electrically conected to predetermined ones of said fixed contacts on the second side of said plate, said external connection means comprising coaxial connectors, the ground member of said coaxial connectors being electrically connected to the conductive surface on said first side of said plate, a plurality of movable contact supporting means, said contact supporting means including a plurality of contact arms where the contact arms attached to first one of said contact supporting means are at right angles to the contact arms attached to a second one of said contact supporting means, each of said contact arms selectively connecting certain of said fixed contacts, a block of non-conductive material extending through said plate and said conductive surfaces, said contact supporting means affixed to said block, and means for moving said block and said supporting means at right angles to the sides of said plate whereby a selected one of said contact supporting means and said contact arms associated therewith are in contact with said fixed contacts.

4. A switch means comprising a plate of non-conductive material, said plate being substantially covered by conductive material on both sides, said plate having an opening cut therein, a plurality of fixed contact means extending through said plate and said conductive side surfaces, said fixed contacts being electrically isolated from said conductive surfaces, individual ones of said fixed contacts electrically interconnected on a first side of said plate, a plurality of external connection means electrically connected to predetermined ones of said fixed contacts on the second side of said plate, said external connection means comprising coaxial connectors, the ground member of said coaxial connectors being electrically connected to the conductive surface of said first side of said plate, a plurality of movable contact supporting means, said contact supporting means including a plurality of flexible contact arms where the contact arms attached to a first one of said contact supporting means are at right angles to the contact arms attached to a second one of said contact supporting means, each of said contact arms selectively operable to connect certain of said fixed contacts, a block of non-conductive material extending through said plate and said conductive surfaces, said contact supporting means affixed to said block, and means for moving said block and said supporting means at right angles to the sides of said plate whereby a selected one of said contact supporting means and said contact arms associated therewith are in contact with said fixed contacts.

References Cited in the file of this patent UNITED STATES Pi-iTENTS 2,376,649 Austin May 22, 1945 2,395,870 Hiehle Mar. 5, 1946 2,759,152 Charles Aug. 14, 1956 FORElGN PATENTS 263,990 Great Britain Jan. 13, 1927

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US2376649 *Mar 28, 1944May 22, 1945Gen ElectricAntenna selector switch
US2395870 *Dec 7, 1942Mar 5, 1946Gen ElectricImpedance switching device
US2759152 *Aug 19, 1952Aug 14, 1956Gen Comm CompanyCoaxial switches
GB263990A * Title not available
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4618840 *Apr 9, 1984Oct 21, 1986Hughes Aircraft CompanyAir-line microwave coaxial reversing switch having diagonally switched path
US5207318 *Jul 29, 1991May 4, 1993Dynatech Microwave Technology, Inc.Plunger switch
US20120279836 *Mar 30, 2012Nov 8, 2012Sony Mobile Communications AbSwitch arrangement, system & device
Classifications
U.S. Classification200/5.00R, 200/16.00R, 200/504
International ClassificationH01P1/10, H01P1/12
Cooperative ClassificationH01P1/125
European ClassificationH01P1/12C