US1785239A

US1785239A - Support for vacuum tubes

Info

Publication number: US1785239A
Application number: US128725A
Authority: US
Inventors: Alden Milton
Original assignee: ROBERT S ALLYN
Current assignee: ROBERT S ALLYN
Priority date: 1926-08-12
Filing date: 1926-08-12
Publication date: 1930-12-16
Anticipated expiration: 1947-12-16

Description

Dec. 16, 1930,.

M. ALDEN SUPPORT FOR VACUUM TUBES Filed Aug. l2, 1926 Je K9) l p 'Patented Dec. 16, 1930 "UNITED STATES PATENT OFFICE.

MILTON x ALBEN,

OF SPRINGFIELD, MASSACHUSETTS, v.ASSIG'NOB BY MEVSNE ASSIGN- MENTS, T ROBERT S. ALLYN, 0F NEW YORK, N. Y.

SUPPORT non VACUUM 'rUiaEs This invention relates to an improvement in supports for vacuum tubes for use in radio apparatuses, and has for its object to provide a support of simple construction Vcapable of reducing to a minimum the shocks and vibrations that may be transmitted from outside sources throughthe support to the delicate mechanism of thev vacuum tube, said v 7 shocks and vibrations often tending to reduce the eiliciency of said tube and interfere seriously with its operations.

It is still further an object of the invention tov embody in the structure of the support aplurality of springs, each of which is preferably constructed 'of a continuous length of wire and has a helical compression portion'lformed .integral therewith for encircling. the terminal pins ofthe vacuum tube, said spring constituting electric circuit connections to said pins and tube.

Stilly another object of the invention is I to embody in the construction of the supporting springs a loop which is utilized in securi said torsionv coil being at right angles to the4 ing the support to its base, and in interposing between said loop and the compression .portion of the spring a torsion coil, the. aXls of axis of said loop and compression portion.

Another object is to prevent distortion of the spring members when insertinggor removing a tube.l

The invention consists in a support for a vacuum tube as set forth inthe following specification.. and particularly as pointed out inthe claims thereof.

Referringto the drawings: l

Figure 1 represents a! central vertical section through avacuum tube support embodying my invention, a vacuum tube of wellknown type being mounted upon said support.v

trating still another modified embodimeritr of the invention. 1

. Like numerals refer to like parts throughout the several views of the drawings.

In the drawings, referring particularly to Figs. 1 and 2, l0 represents a panel constituting a base andv constructed of suitable in.- sulatlng material. Located above the base 10 is an'insulating member 11, preferably cylindrical in form and also constructed of insulating material. The insulating member 11 is provided with a pluralitvof openings 12 extending downwardly therethrough, said openings bein provided forthe purpose of receiving t 1e yterminal pins a of a vacuum tube A, and said openings ma be of Adifferent diameters as illustrated inv igs. 1

and 2, or they may all be the same diameter without departing from the spirit of the invention, it being evident that it is necessary I isv fastened to the insulating member 11 l around the openings 12, and preferably said helical lportion is imbedded iny the material of the insulating member and the inner diameter of said helical portion is the same diameteras that of the terminal pins a. The springs '13v furthermore constitute electric circuit connections lto the vacuum tube A and the diameter of thel compression coil 14 of said spring is such that when the terminal pins a of said vacuum tube.V A are inserted thereinnthe convolutions of the coil 14 will snugly engage the periphery of the terminal p 'pins and form an electrical contact therewith.

The springs 13 embody therein an intermediate portion 15 which projects laterally from the. lower end of the'helical portion 14 thereof,.and saidintermediate portion is approximately parallel with the upper surface of the base 10 vand has a torsion coil 16 formed therein, the axis of which is preferably located at right angles to the axis ofthe com- `pression coil 14. The springs 13 also embody base 10 and parallel to the axis of the compression coil 14.

A binding post 18 is employed as a fastening member in securing the support to the base 10, and said binding post' extends through the loop 17 and base 10 and may have a connecting wire attached thereto `in the usual well-known manner, if it is so desired. Each loop 17 has a terminal portion 19 projecting therefrom and extending downwardly through an opening 2O provided in the base 10, said terminal being provided for the purpose of having a connecting wire attached thereto in any desired manner.

In Figure 3 I have illustrated a modified embodiment of my invention in which the insulating member 11 is supported upon the base 10 by a plurality of springs 21, each of which constitutes an electric circuit connection to a vacuum tube and embodies therein a helical portion 22 constitutinga compression coil, an intermediate portion 23 having a torsion coil 24 formed therein, and a loop 25; but in this spring, a portion 26, between the loop 25 and torsion coil 24, is curved upwardly from said loo toward said coil, and the latter is located a out midway /between the loop 25 and the compression coil 22. j

The spring 21 is fastened to the Vbase 10 by a binding post 28 which extends through the loop 25 of said spring, and said binding post may have a connecting wire attached thereto in the usual well-known manner. Each loop 25 has a terminal portion 27 projectig therefrom and extending downwardly through an opening provided in the base 10, said terminal being provided for the purpose of having a wire attached thereto, if it is so desired.

In Figure 4 still another embodiment of the invention is illustrated in which the insulating member 11 isy supported upon the base 10 by a plurality of springs 29, each of A which constitutes an electric circuit connection to avacuum tube and embodies therein ing therefrom and extending downwardly, vthrough an opening 37 provided in the base Preferably I provide means for limiting the movement of the top piece 11 so as to prevent injury to the springs such as a screw 38 passing through the aperture 41 and is secured firmly into the threaded hole in the metallic insert 40 said insert being moulded or imbedded into the insulating member 11. This construction functions as a stop in upward direction thus preventing injury to the shock absorbing springs during the removal of the vacuum tube.

Upon the screw 38 may be placed a threaded collar 39 which when inserting the A tube in the socket or insulating member 11 may engage the base 10 thus limiting the downward movement of said insulating member 11 thus preventing injury to the

springs

13, 21, or 29. l

The use of this limiting member is optional and is more desirable in some embodiments of my invention than in others.

The various embodiments of this invent-ion are all employedin .exactly the same manner 'as supports for vacuum tubes, and said supports, by reason of their' yielding construction, absorb the shocks and vibrations transmitted thereto and prevent injury to the delicate mechanism of the vacuum tube, and the translation of mechanical vibrations of the tube into electrical vibrations in its associated circuits.

In each of the embodiments of the invention, the springs that are employed in yieldingly supporting the insulating member are all utilized as electric circuit connections to the terminal pins of the vacuum tube, and while it is preferable to have the helical por tion of saidsprings encircle and engage the terminal pins of said vacuum tube, it is evident that said spring may 'engage the terminal pins without encircling the same. y While the various embodiments of this invention all embody therein a torsion coil and a compression coil, it is evident that the helical portion that forms the compression coil may be wound with the convolutions thereof engaging with each other and in va manner to engage the terminal pins a of the vacuum tube and form a contact therewith, as it is evident that the construction of the spring is such that it will form an efficient 'yielding support for the insulatingmember 11 even though the compression action of the spring is eliminated.4

I cla-im f 1. A support for a vacuum tube or the like comprising, in combination, a base, an insulating member. a plurality of springs yieldmgly supporting said insulating member upon said base, each of said springs embodying therein a torsion coil and a compression coil, thewlatter being fast to said insulating` member and adapted to engage aterminal of a vacuum tube, said spring constituting an electric circuitconnection thereto, and means to fasten each of said springs to said base.

iat

2. A support for a vacuum tube or the like comprising, in combination, a base, an insulating member. a plurality of springs yieldingly supporting said insulating member upon said base,each of saidsprings embodying therein a torsion coil and a compression coil, the latter-being fast to said insulating member and adapted to engage a terminal of a vacuum tube,- Said spring constituting an electric circuit connection thereto, each ot' said springs also embodying therein a loop, and means extending through each of said loops and securing each of'lsaid springs to said base.

3. lA support for a vacuum tube' or thelike comprising, in' combination, a base, an insulating'member, a plurality of springs yieldingly supporting said insulating member upon said base, eachof said springs embody `absorbing springs secured to said base, 'saidv a springs being formed of a continuous length of Wire and embodying therein a loop adapted to encircle a fastening member to secure said springs to said base, each of said springs also embodying therein a compression coil adapted to engage the terminal of-a vacuum tube, said spring constituting an electrical connection thereto, the axes of said loop and y said compression coil'being parallel to each other, a torsion coil also embodied in each of said springs interposed between said loop and compression coil, an` insulating member secured to said compression coils, and means for limiting. the movement of said insulating member with respect to said base.

" MILTON ALDEN.

ing therein a torsion coil and a compression coil, the latter 'being fast to said insulating ing therein a torsion coil and a compression coil, the latter being fast to said insulating member and adapted to encircle the terminal of a'va'cuum tube, said spring constituting an electric circuit connection thereto, each of said springs also embodying therein a loop, the'median line of said torsion coil extending transversely of the median lines of said loop and compression coil, and means extending through each of said loops and securing each of said springs to said base.

5. A support for a vacuum tube or the like comprising, in combination, a base, an insulating member, a plurality of springs yieldingly supporting said insulating member upon said base,'each of said springs embodying therein a torsion coil and a compression' l' coil, the latter being fast to said insulating "feo eis member and adapted to encircle the terminal of a. vacuum tube, said spring constituting an electric circuit connection v thereto, each of said springs also embodying therein a loop,

the axes of said loop and compression coil being perpendicular to said base and the axis of said torsion coil being parallel to said base, and means extending through each of said loops and securing each of said springsto saidbase. c

6( A s upport for a vacuum tube or the like, comprislng, in combination, a supporting base, a plurality of conducting and shock