US1834943A - Electron discharge tube actuating means - Google Patents

Description

1931. R. m. E'IBUNQAN, JR

ELECTRON DISCHARGE- TU E ACTUATING MEANS Filed 2s, 1.950

WWENTQR Robert D. V Dunmny? M 1 ORN EY Patented Dec. 8, 1931 UNITED STATES PATENT? OFFICE ROBERT D. DUNCAN, JR., OF EAST ORANGE, NEW JERSEY, ASSIGNOR. TO WIRED RADIO,

' INCL, OF NEXV YORK, N. Y., A CORPORATION OF DELAWARE ELECTRON DISCHARGE TUBE ACTUATING MEANS Application filed February 28, 1930. Serial No. 432,143.

My invention pertains in general to means for actuating switches, and specifically relates to means for actuating a switch combined with an electron discharge tube adapter in a radio receiving set.

My invention is especially adapted for use in space radio receivers in which the detector tube is positioned adjacent the variable tuning condenser, or where the detector tube is situated near the graduated dial associated with a gang of tuning condensers. When it is desired to use such a space radio receiver in conjunction with a wired radio tuner as an auxiliary source of radio frequency signal, a combined adapter and adapter switch are interposed between the said detector tube and the supporting socket therefor so as to se lectively tie in the leads from the said wired radio tuner to the detector tube circuit when desired. To operate the space radio receiver in conjunction with the auxiliary wired radio tuner, it is necessary to actuate the switch on the adapter. 'However, the adapter is necessarily positioned in association with the detector tube and is, therefore, not conveniently accessible with respect to operation of the switch mounted thereon.

One of the objects of my invention consists in providing means for actuating an adapter switch t-l'irough the agency of the graduated tuning dial of a radio receiver.

Another object comprises producing an arm which can be secured to a tuning dial for engagement with the handle of a switch mounted on an electron discharge tube adapter.

Another object consists in providing a spring and stop pin associated with a switch combined with an electron discharge tube adapter to hold said switch in a predetermined position.

I accomplish the above desirable features in a novel adapter switch actuating means for use in combination with a tuning dial and an electron discharge tube adapter switch.

In the drawings accompanying and form- 7 ing a part of the specification and in which like reference numerals designate corresponding parts throughout:

Fig. 1 is a partial vertical sectional view of a space radio receiver showing a detector tube position adjacent a tuning dial of the receiver.

Fig. 2 is a front elevation and partial sectional view corresponding to the representation in Fig. 1.

In Fig. 1, an electron discharge tube adapter 1 is interposed between the detector tube 2 and the supporting socket 3 therefor of a space radio broadcast receiver. The supporting socket 3 comprises part of a mounting panel 4. through which the shaft 7 extends. The shaft 7 is mechanically coupled to a variable tuning condenser, or is mechanically coupled to a gang of variable condensers or othertuning elements. A dial 6 is rigidly secured on the shaft 7 by means of a hub 15 and a set screw 16.

Referring to Fig. 2 it will be seen that graduated radial lines and corresponding numbers are provided on the dial 6 for the purpose of indicating the relative position of the dial with respect to the tuning elements controlled by the shaft 7 These graduated lines and numbers are visible from without 75 the receiver through the window 17 and their position is gauged by reference to an index pointer 18. A knob 19 is also securely mounted on the shaft 7 so that the said shaft can be manually turned to any desiredposition.

In Fig. 1, the switch 5 is mounted on one side of the adapter 1 by means of a pivot member 13. Movement of the handle 11 of the switch 5 through a small arc will cause the internal contact terminals of the said switch 5 to be actuated from one to another of two different relative positions.

In my invention, I provide a stop pin 8 on the adapter 1. A spiral spring 14 is secured to the pivot member 13 of the-switch 5, and to a screw 9 in the adapter 1. This spiral spring 14: exerts a torque on the pivot member 13 such as to cause the handle 11 of the switch 5 to be normally held in a position against the stop pin 8. In this position the internal contacts of the switch 5 are arranged to permit the detector tube 2 to function in the space radio receiver in the usual manner independent of the wired radio tuner.

In my invention, I provide a forked arm '10 1.0

which is secured at a point on the periphery of the dial 6 by means of a set screw 12. As the dial 6 is rotated, the arm 10 will come into engagement with the handle 11 of the switch 5, depressing the same, as shown in Fig. '2. The internal contacts of the switch 5 will then be in a difierent relative position, thereby'tying in the wired radio tuner as. an auxiliary source of radio frequency signals for the detector tube 2; 'Botation of the dial 6 in a reverse direction will move the arm 10 away from the handle 11, thereby permitting the spring 14 to force the said handle 11 up against the pin v8 actuating the switch 5 in a reverse direction so that the space radio detector tube 2 again functions in the usual manner independent of the wired radio tuner. The position of the dial 6 in which the arm 10. engages the handle 11 of the switch-than correspond to a number on the dial 6, such as .number 100 in Fig. '2, which when brought adjacent the index pointer 18 will indicate that the switch 5 is actuated for coupling the tube-2 to the wired radio tuner.

It: is-evid-ent, then, that the dial 6 can be utilized over a wide range oflgraduations for tuning in variant space: radio broadcast stations, and that when the dial 6 is turned into anextreme position such as shown in Fig. 2, thespace radio set will be made to function in conjunction with the wired radio tuner as a source of radio frequencysignal. Such an arrangement is obviously of'great advantage in that the tuning dial of the space radio receiver is made to serve an additional purpose in actuatingan adapter switch which is otherwise relatively inaccessible for operation.

lVhile I have shown certain details of mechanical construction and arrangement of parts, and. have shown these parts employed ina certain type of electrical organization, I donot limit myself thereto except'as may be pointed out' in the appended claims;

hat I claim as being new andoriginal and desireto secure by Letters Patent of the United States is: 7 v 1. In combination with an electron discharge tube. adapter, a multi-poleswitch mountedthereon, and a movable dial, of actuating means for saidswitch'comprising, a switch handle, a forked arm and set-screw I V positioned upon the periphery of {said 1novable dial and adapted to be'rotated into en gagement withsaid switch handle, a stop pin mounted upon said tube adapter, and a spiral spring securedtosaid switch in a manner such as to'hold said switch handle in a position normally against said stop pin.

2. In combination with an electron discharge tube adapter, a multi-pole switch mounted thereon, and a movable dial, of actuating means for said switch comprising, a

I switch handle, means adjustably positioned uponthe periphery of said movable dial and adapted to be rotated into engagement with said tubeadapter and a spiral spring secured to said switch in a manner such as to hold said switch handle normally against said stop pin.

3. In combination with an electron discharge tube adapter, a multi-pole switch mounted thereon, and a movable dial, of actuating means for said switch comprising, a switch handle, means adjustably positioned upon the periphery of said movable dial and adapted to be rotated thereby into engagement with said switch handle, a stop pin mounted upon said tube adapter and a spring secured to said switch in amanner such asto hold. said switch handle normally against said stop pin. J

' r ROBERT D. DUN CAN, JR.

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