US2095100A

US2095100A - Tuning control means

Info

Publication number: US2095100A
Application number: US52683A
Authority: US
Inventors: Maillard Louis
Original assignee: General Electric Co
Current assignee: General Electric Co
Priority date: 1934-12-21
Filing date: 1935-12-03
Publication date: 1937-10-05
Anticipated expiration: 1954-10-05
Also published as: FR795545A

Description

, Oct. V5, 1937. 1 MA|| LARD TUNING CONTROL MEANS Filed Dec. 3. 1935 Inventor:

d, V a 9 MAK@ .t unct O L WA Patented Oct. 5, 1937 UNITED ,STATI-:s

2,095,100 TUNING CONTROL MEANS Louis Maillard, Paris, France, assignor to Gen-'- eral Electric Company, a corporation of New York Application December 3,' 1935, Serial No. 52,683 In France December 21, 1934 3 Claims.

rapid and accurate change from one tuning posim tion to another.

In acordance with my invention, the control shaft of the apparatus to be controlled carries' a hollow cylindrical drum Within which several rings are placed, each rihg of which is provided with one or more recesses or detents. v'Ihese detentsco-operate with .a corresponding number of balls of plungers that are carried by a stationary member mounted on the front panel of the apparatus. Each time the control shaft is o moved fromone desired position to another, one'y of the balls engagesin the corresponding detent and holds the control shaft in an interlocked position. The'cylindrical drum may be connected in any appropriate manner to a control handle within reach of the operators hand.

The novel features which I believe to be characteristic of my invention are set forthwith particularlty in the appended claims. My invention itself, however, both `as to its organization and method of operation, together with further objects and advantages thereof may best be understood by reference to the following description taken in connection with the accompanying drawing in Awhich Figs. 1 and 2 are views partly in cross section of one embodiment of my invention. i I

Referring to Fig. 1 of th drawing, 1t wm be seen that control shaft I, whose angular position is varied according to the frequency desired, has mounted thereon a cylindrical drum 2 having an end wall 3 and a hub 4. Rotatably carried on the inner surface 5 of drum 2 are tworings 6 and 1 which are each provided with a 5 notch or detentI 8 and 9 (shown in Fig. 2) respectively on their inner peripheries. A guard ring-29 secured to drum 2 by screws 39 prevents any axial movement of rings 6 and 1. A station-k ary member I Il mounted on the front panel I I 50 of the, apparatus by means of bolts I2 and I3 (Flg.2), extends within the drum 2 between hub l anfd rings 6 andl 1. Balls I4 and I5 carried in cylindrical yapertures I6' and I 1 of the locking member I0 are pressed against rings 6 and 1 re- 55 spectively by means ofsprings' I8 and I9. It is apparent that when one of the rings is so turned that its detent will be opposite one of the springpressed balls that the ball will be forced into the detent and will then hold the ring in position.

Rings 6 and 1 may be made to coact with drum 2 by tightening set-screws 20 and 2|. The po-- sition of drum 2 may be controlled by any suitable mechanism such as by providing a wheel 22 mounted on the end wall 3 by means of bolts 23 and by connecting this wheel through a Bowden cable 24 (Fig. 2) to a second wheel 25 which rotated by means of the operating handle 26. An end cap 21 may be provided over hub 4 and an indicating disk 28 may be mounted thereon.

The operation of the tuning control is.l as follows: The system is first adjusted by rotating drum 2 until ball I5, for instance, engages/the corresponding detent 9 of ring 1. Set-screw 2| is then loosened and the drum is rotated until the control shaft I has assumed an angular position representing some desiredrfrequency of loperation of the radio transmitting lor receiving system. Set-screw 2I is then tightened. By a similar operation, ring Gis adjusted for operation of the apparatus at some second desired frequency. Assuming now that `the control shaft I is in such a position that ball I4 rests in detent 8 and it is desired to change the frequency of operation .to one determined by the position of/detent 9, the operator rotate handle 26 in a counter-clockwise direction until the spring-pressed ball NMI5, drops into its corresponding detent/9. 'I'he system -is now turned to the second desired frequency.

It is obvious that any number of rings'and corresponding spring-pressed balls may be used depending, of course, upon the number of predetermined desired frequencies at which the system is intended to be operated. It is also apparent thatthere is nolimitation as to how close to- .gether any two desired frequencies may' be for one ball may just be beginning to ride out of its corresponding detent, as a second ball falls into its corresponding detent.

While I have shown a particular embodiment of my invention it will, of course, be understoodv that I do not wish to be limited thereto since different modifications may be made, and I therefore contemplate by the appended oiaims to cover all such modifications as vfall within, the true spirit and scope of my invention.

What I claim as'new and desired to secure by Letters Patent of the United States is:

. '1. In a control device, the combination com- 4prising a control shaft, a pluralityof rings of substantially equal diameters vdisposed about said sh'aft, means for adjustably securing said rings -to said shaft, a corresponding number of springpressed non-rotational elements abutting the inner periphries o1' said rings, each of said rings having a detenton its inner periphery adapted to seat one of said spring-pressed elements at a predeterminedangular position of said shaft'.

2'. In a c'ontrol device, the combination comprising a control shaft, a hollow 'drum mounted on said shaft, a plurality of rings each having a defent on its periphery rotatably mounted within said drum, means for retaining said rings in xed angular relation with respect to said drum, each ring being so positioned as to have its detent correspond to a predetermined desired angular position 'of said shaft, a stationary member extending within said drum and in proximity to said rings, and a plurality of spring-pressed elements carried by said stationary element abutting the inner peripheries of said rings, each springpressed element being adapted to rest in its corresponding detent at some predetermined angular position of said shaft.

3. In a control device, the combination comprising a stationary member, a control shaft supported thereby, a.ho1low drum mounted on said l10 shaft, a plurality of rings disposed axially of said shaft and within said drum, said rings being adjustably secured to said drum and in proximity to said stationary member, and means for interlocking said shaft tosaid stationary member 15 through'one of said rings.