US2123483A - Sewing machine lighting fixture - Google Patents

Description

July 12, 1938. w. o. LANGILLE SEWING MACHINE LIGHTING FIXTURE Filed Fat 20, .1937 2 Sheets-Sheet 1 July 12, 1938. w O LANGlLLE 2,123,483

SEWING MACHINE LIGHTING FIXTURE Filed Feb. 20, 1937 2 Sheets-Sheet 2 Patented July 12, 1938 PATIENT. OFFICE SEWING MACHINE LIGHTING FIXTURE Wilfred o. Langille, Chester, N. 1., assignor to The Singer Manufacturing Company, Elizabeth, N. J., a corporation of New Jersey Application February 20, .1937, Serial No. 126,195

11 Claims.

. This invention relates to electric lighting fixtures, more particularly of the sewing machine illuminating type such as disclosed in U. S. Patent No. 2,067,868, of Jan. 12, 1937, and has for an object to provide simplified and improved means to cushion the electric'lamp-bulb so that it will not besubjected to destructive vibration. A further object of. the invention is to provide the device with an improved lens and reflector mounting which will prevent overheating of any of the external parts of the fixture likely to betouched by the operator.

With the above and other objects in view, as will hereinafter appear, the invention comprises the devices, combinations, and arrangements of parts hereinafter set forth and illustrated in the accompanying drawings of certain specific embodiments of the invention, from which the several features of the invention and the advantages attained thereby will be readily understood by those skilled in the art. I

In the accompanying drawings, Fig. 1 is a longitudinal sectional view of. a lamp-socket,

socket-switch, reflector and shade assembly embodying the invention. Fig. 2 is a left end view of the device shown in Fig. 1. Fig. 2 is a section on the line 2 4, Fig. 2. Fig. 3 is a. view similar to Fig. 2 with the lens, reflector and lamp-bulb removed to show the shade and lamp-socket only. Fig. 4 is an open-end view of the reflector element only. Fig. 5 is a face view of the lens element. Fig. 6 is a perspective view of the base of the lamp-socket element with its current-conducting suspension springs. Figs. 7 and 8 are sections on the line I, I and 8, 8, respectively, Fig. 1.

Fig. 9 is a longitudinal sectional view of a modification of the invention. Fig. 10 is a left end view of the assembly shown in Fig. 9. i Fig. 11 is an end view .of the shade element shown in Figs. 9 and 10, and Fig. 12 is an end view of the reflector element shown in Fig. 9.

According to the preferred embodiment of the invention, as illustrated in Figs. 1 to 83, inclusive, the socket-switch comprises a body-member i and shell 2 which are preferably molded from Bakelite or other similar phenolic condensation material. The portion of the body I extending within the shell 2 is' preferably constructed substantially in accordance with the disclosure of U. S. Patent No. 1,852,365.01? Apr. 5, 1932,and supports a suitable toggle-switch mechanism such as disclosed in said last mentioned, patent. Such a toggle-switch mechanism may include the pivotally movable contact-element 3, the pivoted ops-rating lever l and the toggle-thrust member 5 which actuates the movable contact-member 3 to make and break the circuit through the lamp 6. In the present instance the usual spring-pin socket-terminals are replaced by two current- 6 conducting screws 1, 1 which fixedly bind to the body I the ends 8, 8 of the two co-axial edgewise spiraled current-conducting leaf- springs 9, 9 the free ends III, In of. which are fixedly secured by rivets Ii l2 to the base of the Bakelite molded 10 bell-shaped lamp-receptacle and shade element l3 preferably having within its neck l3 the usual lamp-base screw-shell contact i4 andlamp-base center contact l5 electrically engaged, respective- 13 by the rivets H and I2. 15

The socket-switch body i has a skirt 16 which surrounds and encloses the springs 9 and the neck l3 of the receptacle I3. There is, however, plenty of clearance between, the neck l3 and skirt I 6 so that the receptacle l3 and all parts 20 carried thereby are free to move resiliently in any 1 direction relative to the socket-switch body I.

It will be observed in Figs; 1, 6, 7 and 8 that the ends of the springs 9 are squared and are received'in squared recesses in the body- I and neck i3, so that such springs are fixedly anchored at their opposite ends to the body I and neck [3' and cannot slip or rotate relatively to their fastening screws 1 and rivets Ii, l2.

The receptacle and shade element i3 is formed at 120 spaced points within its rim with inwardly projecting rim-lugs i1, Fig. 3, affording spaced arcuate ledges ill for the similarly spaced and out-turned rim-flanges I! of the bell-shaped sheet-metal reflector 20 which are clamped against their respective ledges l8 by the radially projecting edge-tongues 2i of the glass lens 22 held in place by the spring-wire snap-ring 23 received in grooves 24 in the lugs l'l. One of the inwardly projecting rim-lugs I'I has at the ends 40 of its arcuate ledge l8 opposed stop-shoulders l8, Fig. 3, which are engaged by one of the outt-urned reflector flanges l9 and one of the lens edge-tongues II, as shown in Fig. 2 to prevent rotary slippage of the reflector and lens elements air currents may enter the three segmental spaces a,1"lgs.1and2,betweentherimsoi'theshade i8 and lens 22 and pass between the reflector and shade to the exit holes II: the lamp flxture being customarily used in an upright position, as shown in said U. 8. Patent No. 2,067,888, with the light directed downwardly upon the work. The clamp ll oi the last mentioned patented construction may be sized to flt and applied'extemally to the skirt II o! the present socket-switch for the support of the latter.

The combined weight of the lamp 0, shade is, reflector 2| and lens 22 is carried by the currentconducting springs I and the inertia of these several elements combined serves to steady the lamp 0 against vibration; the spring-supported assembly being tiltable in any direction or movable bodily axially relative to the socket-switch body I. It is, however, flrmly supported by the springs 9, alone. u nst bodily lateral or axial twisting movements.

In the modifled form of the device shown in Figs. 9 to 12, both inclusive, the socket-switch body and socket-shell 21 carry the same toggleswitchparts3,landl,asshowninFig. 1. The current-outlet screws II and current-conducting spiral springs I! are oi the same construction as the like parts oi Hg.- 1.

In' the present instance, however, the springs 20 support a screw-base type of lamp receptacle II which has no shade-element combined with it and carries only the lamp 3|. The neck 32 of the sheet-metal shade 83 flts snugly upon the skirt ll of the body 2' and is formed near its rim with a circular seat II for the out-turned 120 spaced rim-flanges II of the reflector 31.

The reflector I1 is formed within the flanges It with seats 88 for the 120 spaced radial tongues I! of the glass lens 40 which is held in place by the spring-wire snap-ring I. This snap-ring is generally circular in form but has three outer segmental portions H which are received in the groove 41 of the shade 33 and three inwardly oflset segmental portions 44 which bear facially upon the radial tongues of the glass lens 40.

In the modifled form of the invention the lamp II and receptacle 3. only are supported by the current-conducting springs 29 which may be made correspondingly lighter in weight than the pri gs 0. a

The present construction aflords a simple, compact and sturdy yet sensitive shock-absorber for an electric lamp-socket; the lamp being wholly spring-suspended with no contacting rigid elements to transmit vibration from the supporting body to the lamp.

It will be obvious to those skilled in the art that the invention may, without departure from its essential attributes, be embodied in various speciflc forms other than those shown and described, which latter are to be considered in all respects as illustrative oi the invention and not restrictive; reference being had to the appended claims rather than to the foregoing description to indi-' cate the scope of the invention.

Having thus set forth the nature of the inven-- tion, what I claim herein is:-

I. In an electric lighting device, a bell-shaped lamp-shade molded from insulating material and formed with neck and rim portions, lamp-baseengaging electrical contacts mounted within said neck-portion, a pair of current-conducting-edgewise spiraled leaf-springs supporting said shade by its neck and each electrically connected with a respective one of said lamp-base-engaging consocket-switch body, a switch-mechanism mounted thereon, a socket-shell enclosing said switchmechanism, a pair of outlet current-conductors carried by said body, a pair of co-axial currentconducting spiral leaf-springs connected each to a respective one of said switch-outlet currentconductors, and a lamp-receptacle carried by said springs and having lamp-base-engaging contacts electrically connected respectively to said springs, said socket-switch body having a skirt enclosing said spiral leaf-springs and spaced from said lamp-base receptacle.

4. An electric lighting device comprising a socket-switch body, a switch-mechanism mounted thereon, a socket-shell enclosing said switchmechanism, a pair of outlet current-conductors carried by said body, a pair of co-axial currentconducting spiral leaf-springs connected each to a respective one of said switch-outlet currentconductors, a-bell-shaped' lamp-receptacle and shade element having a neck-portion supported by .said springs, and lamp-base-engaging contacts in said neck-portion electrically connected respectively to said springs.

5. An electric lighting device comprising a socket-switch body, a switch-mechanism mounted thereon, a socket-shell enclosing said switchmechanism, a pair of outlet current-conductors carried by said body, a pair of current-conducting springs connected each to a respective one of said switch-outlet current-conductors, a bellshaped lamp-receptacle and shade element having a neck-portion supported entirely by said springs, lamp-base-engaging contacts in said neck-portion electrically connected respectively to said springs, and reflector and lens elements carried by said shade.

6. An electric lighting device comprising a socket-switch body, a switch-mechanism mounted thereon, a socket-shell enclosing said switchtively to said springs, said shade having circumferentially spaced inwardly projecting rim-lugs, and reflector and lens elements seated upon said rim-lugs and spaced from said shade.

'7. In an electric lighting device, a bell -shaped lamp-shade having a rim-groove and a rim-seat,

a bell-shaped reflector having circumferentially' spaced out-turned rim-flanges in engagement with said rim-seat, a lens element seated upon said reflector and peripherally spaced from said shade, and a wire snap-ring engaging said lens and seated in said rim-groove.

8. A supporting body of molded electrical insulation material, a pair of current-conductors fixedly mounted therein, a lamp-receptacle having a body of molded electrical insulation material and lamp-base-engaging contacts carried thereby, and a pair of sheet-metal current-conducting leaf-springs of edgewise spiraled form each fixed at one end to said supporting body and to a respective one of said current-conductors therein and each fixed at its opposite end to the body of said lamp-receptacle and to a respective one of said lamp-base-engaging contacts carried thereby.

9. In a lighting device, a bell-shaped sheetmetal reflector having at the rim of its skirt arcuate edge-portions and out-turned rim-flanges, a lens having arcuate edge-portions and radial edge-tongues projecting outwardly beyond its arcuate edge-portions and disposed in ju'xtaposi tion with the out-turned rim-flanges of said reflector, and a bell-shaped supporting shade having seating means within its rim for said reflector rim-flanges and lens edge-tongues, there being arcuate ventilating openings between said shade and the arcuate edge-portions of said lens and reflector.

10. In a lighting device, a bell-shaped sheetmetal reflector having at the rim of its skirt arcuate edge-portions and out-turned rimflanges, a lens having arcuate'edge-portions and radial edge-tongues projecting outwardly beyond its arcuate'edge-portions and disposed in juxtaposition with the out-turned rim-flanges of said reflector, and a molded bell-shaped supporting shade of electrical insulation material having a neck-portion fitted with lamp-base-engaging electrical contacts and a rim-portion formed with seating means for said reflector rim-flanges and lens edgetongues, there being arcuate ventilating opening between said shade and the arcuate edge-portions of said lens and reflector. I

11. In an electric lighting device, a lamp-base receptacle having an insulating body and lamp- "base-engaging contacts carried thereby, a pair of coaxial spiral springs each. formed as an edgewise spiraled flat strip of spring metal and each WILFRED O. LANGILLE.

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