US2398595A - Rough service electrical device - Google Patents

Description

A ril 16, 1946. A. 1.. POWELL ETAL 2,398,595

ROUGH SERVICE ELECTRICAL DEVICE Filed Nov. 20, 1944 INVENTORS A. L. Pan 24 MI E0B/A/J0 ATTORNEY Patented Apr. 16, 1946 UNITED STATES PATENT OFFICE ROUGH SERVICE ELECTRICAL DEVICE Arthur L. Powell, Tottenville, Staten Island, and William J. Robinson, Baldwin, N. Y., assignors to Westinghouse Electric Corporation, East Pittsburgh, Pa., a corporation of Pennsylvania Application November 20, 1944, Serial No. 564,308

Claims.

This invention relates to electrical devices and, more particularly, to such provided with shock-absorbing means adapting them for rough service use. I

The principal object 01' our invention generally considered is to provide an electrical device, such as a lamp, in which a, shock-absorbing supporting element is disposed between the neck of the bulb and the energy-supplying base, thereby damping shocks which are impressed on the base and minimizing their effect on the fragile elements in the envelope.

Another object 01' our invention is to provide an electrical device, such as an incandescent electric lamp, with a compressed wire-mesh cylinder in which the neck of the envelope nests andis supported, and which is in turn connected to the base, to effect a damping action on shocks transmitted to said base, thereby adapting said device for rough service lamp usage.

Other objects and advantages of the invention will become apparent as the description proceeds.

Under present condition of modern warfare, with lamps and other electrical devices such as radio tubes which are subjected to concussion from high power explosives, present means for attaching such devices to the power supply, such as a base rigidly secured to a lamp bulb and firmly secured to a socket rigidly mounted on the frame of the battleship or other fighting vehicle, all too readily transmit the force of the concussion to the filament and other internal delicate parts. as Well as to the glass or other internal or external supporting members. Thi all too frequently results in the destruction of the lamp or other device at the very moment when it is most needed.

Various attempts have been'made to eliminate or dampen shock transmitted to the bases of such devices, but in most instances the shock absorbing means has been disposed in the socket for the devices. This, however, necessitates considerabl expense in replacing all existing sockets.-

Consequently, we propose to provide a rough service energy-translation device, such as an incandescent electric lamp, which can be readily installed in any existing socket without expense other than the cost of the device itself.

Referring to the scale drawing:

Fig. 1 i a full size elevational view of an electrical energy-translation device, in the form of an incandescent lamp provided with shock-absorbing means associated with the base, in accordance with our invention.

Fig. 2 is a vertical sectional view of the base,

shock-absorbing means, and neck portion illustrated in Fig. 1, on an enlarged scale.

Fig. 3 is a Perspective view on an enlarged scale of a shock-absorbing element of our improved device.

Fig. 4 is a view corresponding to Fig. 2 but showing a modification.

Referring to the drawing in detail, like parts being designated by like reference characters, and first considering the embodiment of our invention illustrated in Figs. 1, 2 and 3, there is shown a form of incandescent electric lamp II which comprises a vitreous envelope l2 having suitably mounted therein a conventional filament I3 supplied with electrical energy through leadin conductors l4 and I5, passing through a press l6 and the st m portion 11 of the envelope.

The customary procedure in lamp manufacture is to cement a, metal base l8 directly to the envelope after fitting it over the outer end of the neck portion thereof. In the present instance, we interpose between the base l8 and neck IQ of the envelope, 8. wire-mesh cylinder, providing both axial and radial resiliency which 35 i more than usually effective for absorbing shocks, desirably formed of fine brass wire woven when elongated as indicated at 3! in Fig. 3, and then compressed axially to the form 2| represented in Fig. 3, where it is likewise a, cylinder having a moderately thick wall, of internal dimension snugly receiving the neck portion is of the envelope l2, to which it is connected in a conventional manner, as by means of basing cement 22. The dimensions of one embodiment which has been used and is designated 2| in Fig. 1 is about 1%" outside diameter, 1" inside diameter. and /2" long, but we are not limited to these dimensions. The shock absorbing cylinder 2| may be of the type manufactured by the Metal Textile Corporation, of 4 Central Avenue, West Orange, N. J., and designated Lamp shock ring.

. The other, or in this instance th lower, end

oi the cylinder 2|, is desirably seated on and secured to the open end portion of the base Hi. In the present embodiment, the screw-threaded metal shell 23 of the base It is spaced from the eyelet 26 by glass or other suitable insulation 20, and has an annular extension 24 terminating in a short cylinder extension 25, providing an annular seat and protective flange, to which the lower end of the wire mesh cylinder is secured, as by means of solder 28. As is customary, one of the leads such as it is secured to the shell 23, in this instance desirably through the wire-mesh other numbered II is securedto the customary base eyelet II, asbymeansotsolder'll.

asinthe Referring now to the embodiment oi our invention illustrated 'in- Fig. 4, there is shown aform of incandescent electric lamp H, which preceding embodiment, comprises a vitreous envelope is having suitably mounted "therein a conventional filament (not shown) like the filament II of the preceding embodiment,

s plied with electrical energy through lead-in conductors it and II, passing through a pres (not shown) and the stem portion llof the envelope.

In the present instance, we interpose between the base II and the neck I! of the envelope, a wire mesh cylinder 2| like that of the preceding embodiment, in one end of which the neck I! snugly fits and is connected as by basing cement l2, and the other end of which is secured to the screw threaded metal shell portion 23', as by forming an annular extension 24' on said shell portion, terminating in an elongated cylindrical portion II in which the mesh cylinder 2 I loosely fits. After placing the cylinder 2i, it may be permanently held in place by bending over the free or upper edge of the cylindrical ortion II, as indicated at It. The lead It is, in thi instance, secured to the bent-over portion 28' as by means of solder II. and'the 1nd I! is secured to the center contact as by means of solder ll".

Fromth foregoingdisclosure,ltwillbeseen that we have provided for effectively damping the shocks or vibration transmitted from the base to the envelope oi an electrical device, such as a lamp, radio tube, or other evacuated device, by a woven wire-mesh cylinder, which is adapted to exert a damping or shock-absorbing action radially as well as axially, thereby efiectiveiy protecting the fragile elements of the device.

Although preferred embodiments of our invention have been disclosed, it will be understood that modifications may be made within the spirit and scope of the appended claims.

We claim:

1. An electrical device comprising an envelope having fragile elements therein, a base therefor, and a wire-mesh hollow cylinder of substantial wall thickness for absorbing shocks between said base and envelope, one end of said envelope fitting within one end of said cylinder, connected thereto and supported thereby, the other end of said cylinder being connected to said base.

2. An electrical device comprising an envelope having a neck and enclosing fragile elements, a base for said device, and a shock absorbing compressed wire-mesh hollow cylinder of substantial wall thickness within one end of which a portion of said neck nests and i supportingly connected. the other end of 'said cylinder being connected to said base.

3. An electrical devicecomprising 'an envelope enclosing fragile elements. a base for said device. said base having an extension providing an annular seat. a wire-mesh hollow cylinder of substantial wall thickness eng in said seat and connected thereto, the neck of aid envelope fitting within the free end of said cylinder and supportingly connected thereto, to provide for the absorption of shocks transmitted to said base to assasos flu.

prevent them from dam i g the fragile elements in said envelope.

4. An electrical device comprising an envelope enclosing fragile elements, a base for engaging an ene -s p yin sock t. sa d base having a cylindrical extension, a compressed wire-mesh hollow cylinder of substantial wall thickness nesting within said extension and in turn supportingly receiving the neck of said envelope, means cementing saidneck within said cylinder, and means holding said cylinder in place within said extension.

5. An electrical device comprising an envelope having fragile elements therein, a base therefor, and a hollow wire-mesh cylinder of substantial wall thickness and length for absorbing shocks between said base and envelope, one end of said envelope fitting within one end of said cylinder, connected thereto and supported thereby, the other end of said cylinder being connected to said base.

8. An electrical device comprising an envelope having a neck and enclosing fragile elements, a metal base for said device, and a shock absorbin compressed wire-mesh hollow cylinder of substantial wall thickness within one end of which a portion of said neck nests and is support nslv connected, the other end of said cylinder being soldered to the open end portion of said base.

7. A necked electrical device comprising an envelope enclosing fragile elements, a base for said device, said base'having an extension providing an annular seat, a hollow wire-mesh cylinder of substantial wall thickness en ging said seat and soldered thereto, the neck of said envelope fitting within the free end of said cylinder and cemented thereto, to provide for the absorption of shocks transmitted to said base to prevent them from dam ing the fragile elements in said envelope.

8. An electrical device comprising an envelope enclosing fragile elements a base for engaging an energy-supplying ocket, said base having a cylindrical extension, a compressed wire-mesh'hollow cylinder of substantial wall thickness nesting loosely within said extension and in turn supportingly receiving the neck of said envelope, means cementing said neck within said cylinder, .and overlying flange means on said extension holding said cy nder in place therewithin.

9. An electrical device comprising'an envelope enclosing fragile elements, a base for said device. said base having an extension providing a seat in a transverse plane, a wire-mesh tube of substantial wall thickness and length, having one end engaging said seat and secured thereto, and the neck of said envelope fitting within the other end of said tube and secured thereto, to provide for the absorption of shocks transmitted to said base. as a protection to the fragile elements in said envelope.

10. An electrical device comprising an envelope enclosing fragile elements, a base for said device, said base having an extension, a compressed wiremesh tube of substantial wall thickness nesting loosely within said extension and with it outer end receiving the neck of said envelope, means securing said neck within said tube, and flange means overlying said extension and holding said tube in place therewithin.

- ARTHUR L. POWELL WILLIAM J. ROBINSON.

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