US2436921A - Dial lock - Google Patents

Description

March 1948. H. E. GOLDSTINE r AL 2,436,921 I am. LOCK Filed March 22, 1944 m/VE/vmes 6 hALl/WV 5. 040.9 mvs os'rw/v 1 0/57 ATTdE/VE Patented Mar. 2, .1948

UNI-TED STATES PATENT OFFICE .Hallan E. Goldstine and Oswin F. Voigt, Port Jefferson Station, N. Y., assignors to Radio Corporation of America, a corporation of Delaware Application March'ZZ, 1944, Serial No. 527,597

This invention relates to a new and usefulv dial lock for use with radio apparatus.

An object of this invention is to provide a selfaligning dial lock having a clamping action such that the spring will have some free motion which will allow the bottom portion to open up.

Another object of this invention is to provide a simple and inexpensive radio tuning dial lock which will tend to keep the lock nut portion from loosening under vibration.

A feature of this invention is a simple spring member which is fastened to a panel by a slotted mounting bar, the spring member being provided with a lock nut and. stud which clamps the dial in any desired position.

Some of the advantages of this dial lock over those of the prior art are:

1. It is self-aligning, the clamping action is such that the spring has some free motion and allows the bottom portion to open.

2. It is simple to make and assemble.

3. The clamp has plenty of clearance when open.

4. The knurled nut is under spring action when in the locked position, which tends to keep the nut from loosening under vibration.

5. When assembled the screw stud is peened over, so that the knurled nut cannot fall off.

This invention will best be understood by referring to the accompanying drawing in which:

Fig. 1 isa front elevation of the dial lock,

Fig. 2 :is a section taken on line 2-2 of Fig. 1, and

Fig. 3 is :a side elevation of Fig. 1.

Referring now to the accompanying drawing, a mounting or support bar I is secured to the panel 2 of any suitable radio apparatus (such as a receiver or a transmitter), in any suitable position, by means of two round head screws 3 which are tapped in the panel at 4. The central portion of the mounting bar I is provided with a slot 5 around which there is located a spring member 6 which is preferably constructed of beryllium copper or any other suitable spring material. The spring 6 has a fiat back portion 6A, a curved front portion 63, and a dial engaging bent portion 6C which is bent as indicated. A threaded stud I having a rectangular bottom plate 8 is arranged to be prevented from rotation by slot 5 and passes through apertures in portions 6A, 6B and 6C of the spring, the location of the apertures being just beyond the position in which a dial plate 9 is arranged to rotate. A knurled thumb nut I is mounted for rotation on stud 1 just outside the spring por- 4 Claims. (Cl. 188-83) tion -6B. The end of the stud 1 is peened over at ll so that the nut l0 cannot fall off due to vibration and thus become lost. The dial 9 is provided with the tuning operating shaft l2 and knob l3, both of which may be of any suitable size or configuration. The shaft 12 may operate a variable condenser, inductance or similar tuning devices.

In the operation of the device of this invention, whenever it is desired to change the adjustment of the radio apparatus, the knurled nut I0 is loosened by rotating it on the threaded stud I which releases the pressure of the spring 6 on the dial plate 9. The desired adjustments are then made by rotating the dial plate 9 and shaft l2 by grasping the handle l3 and rotating the dial until a proper desired setting is obtained on the radio apparatus as indicated by the fixed arrow index shown on panel 2. After the pro-per adjustment is obtained and it is desired to prevent any further changes in the then obtained adjustment, the knurled thumb nut It is then tightened until the curved front open portion of the spring 6 is closed sufficiently toward its rear portion to frictionally engage the dial plate therebetween. The dial plate is thus held in a locked position thereby preventing any further turning 'of the dial plate 9 and shaft I2.

While we have indicated and described a device of our invention, it will be apparent to one skilled in the art that our invention is by no means limited to the particular device-shown and described, but that many modifications may be made without departing from the scope of our invention.

What we claim is:

1. An article of manufacture including a support member having a slot and apertures adjacent thereto adapted to receive mounting means, a folded open ended spring located in and around the slot in said support member, a threaded stud passing through apertures in said spring, means located on one end of said stud for engaging the slot in said support member to prevent the turning thereof, and a threaded member positioned on said stud and arranged to close the open ended portion of said spring.

2. A self-aligning dial lock comprising a support plate having a slot and apertures adjacent thereto, means passing through said apertures for mounting said dial look, a folded open ended spring member secured to said support plate, a threaded stud passing through three aligned apertures in the folded portions of said spring, and a. threaded lock nut positioned on said threaded stud and arranged to close the open ended portion of said spring member whereby said dial is located in a desired position by applying'pressure to said spring.

3. A dial lock plate comprising a support memher having a slotted portion and apertures therein adapted toreceive mounting means, an open ended spring member folded to form three parallel portions' one portion being located in and rotation on the threads of said stud and arranged to close the open ended portion of said spring. ".,,1iio

4. A self-aligning dial lo'ckcomprising' asap member to look a dial plat ihadies'iredp port member having a slot and apertures adjacent thereto adapted to receive mountingTme'ans,

a. folded open ended spring located in andaround the slot in said support member, means-located at one end of said stud ior engaging theslot in a e er i ee ei P -fa he mensw a- 4 of, a threaded member positioned on said stud and arranged to close the open ended portion of said spring and means located at the other end of said stud to prevent said threaded member from coming off of said stud.

HALLAN E. GOLDS-TINE.

REFERENCES ermn The following references are of record in the of this patent:

Name Date 1,354,935. ,ea, Aug. 1, 1944 seems v menway Sept. 17, 1907 1,981,338 Gargan Oct. 15, 1918 2,323,608 Ks't r July 6, 1943 FOREIGN PATENTS Number Country Date 713,819 France. Aug-24 931

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