USRE20032E - Reflecting electric lamp - Google Patents

Description

July 14, 1956.

H. DOUGLAS REFLEGTING ELECTIRIC LAMP Original Filed Feb. 3. 1930 2 Sheets-Sheet l I HARRY A. 130mm lNvLNTOR T ATTORNLT-S H. A. DOUGLAS 7 REFLECTING ELECTRIC LAMP Original Filed Feb. 3. 1950 2 Sheets-Sheet 2 m 0 m A vl .R m H m m U M PW W IMM l. B

Reiuucd July 14, 1936 "UNITED STATES I 20,032 REFLECTING ELECTRIC LAMP Harry A. Douglas, Bronson, Mich.

Original No. 1,876,877, dated September 13, 1932,

Serial No. 425,547, February 3, 1930. Appllcation for reissue March 17, 1934, Serial No.

25' Claims., (01. 113-339 My invention relates to structures employing incandescent electric lamps and is particularly serviceable in connection with concave reflectors, though there are features of my invention whose use is not to be thus limited.

The principal object of my invention is to provide a new and improved means for enabling the assembly of an incandescent electric lamp with a mounting, and more particularly with a reflector. Another object isto provide new and improved means for positioning, and for holding in position, with a mounting or reflector, an incandescent electric lamp.

A further object is the provision of a construction in which the reflector, itself, is employed to receive the pressure that enables the assembly.

of the lamp and mounting or reflector, an arrangement which permits of direct assembly of the lamp and mounting or. reflector.

Other objects will appear hereinafter as description of the invention proceeds.

The novel features oi'the invention will fully appear from this specification and the accompanying drawings forming a part thereof and disclosing one embodiment of the invention, and all these novel features are intended to be pointed out in the claims.

In the drawings, Fig. l is a view illustrating one embodiment of my invention, the incandescent lamp being shown in elevation, while a socket means assembled therewith and-a fragmentary portion of a mounting are shown in section;

Fig. 2 is-a sectional view on line 2-2 01' Fig. 1;

Fig. 3 is a sectional view on line H oi Fig. i;

Fig. 4 is a sectional view on line 4-4 of Fig. i;

Fig. 5 is a sectional view of a completeautomobile head lamp embodying the structure oi! my invention shown in ,Fig. 1;

Fig. 6 is a sectionalview on line t-O of Fig. 1;

and

Fig. 7 is a perspective view illustrating some parts in separated relation.

The head lamp illustrated is inclusive of a parabolic reflector l whose parabolic reflecting face'is covered by a light transmitting closure 2 which may be of glass. This closure is held providing axially depressed seats l8.

present invention on which account further description of these parts need not be given.

- In the embodiment of the invention illustrated an incandescent lamp 5 has a generally cylindrical lamp base 6. The reflector i has a pri-. 5 mary circular opening I or substantially the diameter of the lamp base 6, which opening, when used, may surround the base in close proximity therewith. The reflector i also is provided with a plurality of auxiliary openings 8, 9, the purpose 0! 10 which will appear. The auxiliary openings I, l are in this case formed by locally extending the primary opening I.

The lamp 5 is positioned and held in position with the reflector by means associated with the lamp and with the reflector. In this case the positioning means proper is associated with the base 6, which is laterally extended or enlarged. The lateral extension or enlargement of the base 6 is desirably in a plane perpendicular to the axis of the base, and may take the form of a plurality oi projections or pins Ill. The holding means in this instance includes a cage-like means ll.

The cage-like means Ii includes a shell portion I! with which are associated axially extending spaced portions, in the form of bars or tongues i3.

The-bars or tongues It, in this case three in number, are adapted to be mounted with the reflector l, by insertion through the respective auxiliary openings 8, 9; as will more fully appear.

The illustrated embodiment of my invention includes bayonet connection means between the lamp base 6 and the cage-like means ii. By 5 way of illustration, that element of the bayonet connection means provided with a slot is, in this instance, carried by or forms a part of the cagelike means ll, whereas the element cooperating with the slotted element is carried by or forms a part of the lampbase. Accordingly, the bars II are provided with transversely extending slots or recesses It. On one side or edge these slots are not rectilinear but are provided with shoulders IS.

The approach to the top 01' the shoulders it, from the open side of the slots I4 is desirably in the form oi. inclined planes Il. I

The portion 01' the bayonet connection means, complementary to the slots i4, is, in this instance, provided by the lateral extension or enlargement on the lamp base 6, specifically in this instance the projections II.

The bars it of the cage-like means are desirabiy bent radiallyoutwards along one axial edge II, as can be seen most clearly in Figs. 4 and 7, so that the portions I9 so bent are in general planes approximately tangent to the inner peripheral locus of the cage-like means. The portions 19 are adapted to substantially register with the auxiliary openings 8.

In order'that the bars l3 may be more readily mounted with the reflector, the auxiliary openings 9 are provided. These openings, which merge into theopenings 8, have their radially outer edges formed to be substantially registrable with the bent portions l9 and are of suificient peripheral width in conjunction with the openings 8 so that the axial ends 2|! of the bars I! may be inserted through said openings. When so inserted and then rotated .in a counter-clockwise direction, as'viewed in Fig. 7, the portions I! are cammed radially inward until the trailing edges 01' the portions I! clear the shoulders 2| formed at the Junction between the auxiliary openings 8 and 8, whereupon the portions l9 snap radially outward into the openings 8, the bars I! being desirably made of resilient material. When that position is assumed, the seats l6 overlie the portions 22 of the reflector. The portions I! are axially slidable in the openings 8. In the illustrated construction, the radially outer margins of the openings 8 are preferably equidistant from the reflector axis, so that the cage-like means when mounted with the reflector has its.axis coincident with the axis of the reflector. a

For the purpose of biasing the seats l6 toward the reflector, a resilient means is provided which in thiscase is mounted with the cage-like means II and comprises three elements here shown as three spaced lea! springs 23 which may be integrally associated with a central plate 24. The plate 24 has an opening large enough to permit the plate to be slipped over the shell portion l2. Motion of the plate 24,- toward the right, as viewed in Fig. 1,,may be limited by cars or enlargements 25 on the shell l2. The ends of springs 23 are based on the reflector.

The ears 2! may be bent radially inward'to retain in position with the shell portion l2, a contact carrying insulating member 26. The member 26 may be a disc somewhat larger in diameter than the outside shell portion and provided withnotches for cooperationwith the ears 25. The member 28 has associated therewith a resilient means which comprises a stem or rod 28, slidable in the member 26, a sleeve" being desirably interposed. The resilient means proper is shown as a helical spring II provided with a sleeve, suitably mounted in said member, disposed about the stem 28 and interposed between a head 2! on the stem 28 and a shoulder on the sleeve 21. The movement of the head 2| under. the bias of the springll is suitably limited asby a collar 22 on the stem 2!. The head 2! may serve as an electrical contact to contact with a contact 20 on the base or the lamp. The stem 2! may have a conductor 38 suitably connected thereto.

In the illustrated embodiment of the invention, the lamp 5 is a so-called single pole lamp whose filament 33 has one terminal connected by a conductor 24 with a metallic sheath that surrounds and forms a part of the lamp base 6. The other terminal of the lamp is connected by a conductor 25 with the contact II, in this case upon the lamp axis. o

Assuming that the cage-like means II has been mounted with the reflector l as hereinbefore described and as shown in Figs. 1 through 6,

. points, desirably approximately 120 apart, regplishes at least the principal object of my inven- 2o,os2

iii-it is desired to position a. lamp 5 with the reflector I, the lateral extension means on the lamp base is first sopositioned and moved axially toward the reflector l, against the bias of resilient means 3|, that the pins III are opposite the open sides oi the gaps between the inclined planes l1 and the reflector l. The lamp is then rotated so that the pins Ill enter said gaps, the resulting cam action as between the pins ill and the inclined planes l1 moving the bars Hi toward the left, as viewed in Fig. 3, against the bias of the'resilient means 23, the biasing action 01' which is thus increased. When, in such rotative movement of the lamp, the pins I clear the shoulders IS, the seats l6 snap-onto the pins Ill, into the position shown in Fig. 3. h It is evident that the lateral extension means on the lamp base thus will be pressed against and positioned from the reflector at three spaced 20 istering with the pins Ill. The positioning means thus provided insures the coincidence of the axes of the lamp and reflector, and. also since the lighting center of the filament 33 is upon the lamp axis, the lighting center can be brought 25 into coincidence with the focus of the reflector by suitable predetermination of the distance between the lighting center and the lateral extension means, specifically the pins Hi.

It will be evident that the cage-like means II with its resilient means 23 serves not only to press the'positioning means proper of the lamp into registry with a plurality of points associated with the reflector, spaced about the periphery of the'lamp, to position the lamp from 35 the reflector, but also serves, through the bars or tongues thereof, in cooperation with the lateral extension on the lamp base, to restrain movement of the lamp about its axis. In order that movement of the lamp about its axis may be restrained in the direction the reverse from that which takes place in assembling the lamp with the reflector, and at the same time permit ready intentional removal of the lamp, the approach to the tops of the shoulders IS, in a directimi. from the ends of the slots l4 toward their open ends may also be in the form of inclined planes 31', as indicated in Figs. 3 and 7.

It is further evident that the described construction is not only adapted to'perform all of the functions or the usual socket means for incandescent electric lamps but that in this instance there is provided a slot-and-projection connection means which in its more specific aspects is jointly defined by the lamp base means, the reflector and the socket means. More specifically, the construction provides a bayonet slot or seat. or both. defined jointly by the reflector means and the socket means. In view oi! the foregoing it will be apparent to 60 those skilled in the art that the herein disclosed embodiment of my invention provides a newand improved lamp assembly, and accordingly accomtlon.

It also will be obvious to those skilled in the art that my invention may be embodied in other constructions wherein the means for positioning the lamp. and the means for holding it in position with the reflector, may assume a variety of 70 forms, variously changed and modified within the spirit of the invention. I I

, In general it will be clear to those skilled in the art that the features of my invention need not all be used in one embodiment such as the parmodified, without departing from the spirit of the invention. or sacrificing the advantages thereof, and accordingly that the disclosure herein is illustrative only, and that my invention is not limited thereto.

Iclaim:

1. In combination: an incandescent electric lamp having a fllament; a reflectori'or said lamp, presenting toward said filament a side having a reflecting surface; positioning means on the base of said lamp, for positioningsaid lamp relative to said reflector, constructed-and arranged to bring said lamp and reflector into register at a plurality of spaced points disposed about the axis .01 said lamp at-said side of said reflector; andmeans acting to press said positioning means and said reflector into register at said points, to position said lamp directly. from said reflector.

2. In combination; an incandescent .eiectric lamp having a filament; a reflector for said lamp,

presenting toward said filament a side having a reflecting surface; positioning means on the base of said lamp. for positioning said lamp relative to said reflector, constructed and arranged to bring said lamp and refiectorinto register at a plurality of spaced points disposed about the axis or said lamp at said side oi. said reflector; pressing means, detachably mounted on said reflecto acting to press said positioning means and said reflector into register at said points, to position said lamp directly from said reflector; and means for releasably holding said pressing means in mounted position.

3. iii combination: an incandescent electric lamp having a fllament; a reflector for said lamp, presenting toward said fllament a side having a reflecting surface; positioning means on the base 01' said lamp, for positioning said lamp relative to said reflector, constructed and arranged to bring said lamp and reflector into register at a plurality of spaced points disposed about the axis of said lamp at said side of said reflector; pressing means acting to press said positioning means and said reflector into register at said points, to position said lamp directly from said reflector; and means including a bayonet connectionior connecting said pressing means to said mounting.

4. In combination: an incandescent electric lamp having a filament; a reflector for said lamp. presenting toward said fllament a side having a reflecting surface; positioning means on the base of said lamp, for positioning said lamp relative to said reflector, constructed and,arran'ged to bring said lampand .reflector into register at a plurality of spaced points disposed about the axis of said lamp at said side of said reflector; pressing means acting to press said positioning means and said reflector into register at said points, to position said lamp directly from said reflector; means including a bayonet-connection for connecting said pressing means to said mounting; and means for latching said bayonet connection q against unseating rotation.

5. In combination: an incandescent electric lamp having a filament; a reflector i'or said lamp, presenting toward said filament a side having a reflecting surface; positioning means for said lamp adapted to bring said lamp and reflector into register at a plurality of spaced points disposed about the axis of said lamp at. said side of said reflector; and means acting to press said positioning means and said reflector into register, at said points,-to position said lamp copesf-ticular disclosed embodiment, and may be individually or collectively variously changed and .directly 'irrom said reflector; said last named :about the periphery oi said aperture at said side not said reflector; and socket means for said lamp,

mounted with said reflector, inalineiiient with said aperture, and engaging said base; said socket means comprising resilient means, and said resilient means acting to press a portion of said socket means against said positioning means. to thereby press said positioning means and said reflector into abutment at said points, to position saidlamp directly from said reflector.

'I. Incombination: an incandescent lamp having a filament; a reflector for said ii p. Presenting toward said fllament a side having a refleeting surface; said lamp having positioning means adapted to register with said reflector at a plurality ,oi spaced'points disposed about the axis of said lamp at said side of said reflector; means, mounted with said reflector, for coop eratlon with said positioning means, to restrain movement of said lamp about its axis'and means acting to press said positioning means and said reflector into register, at said points.

8. In combination: an-incandescent electric lamp whose base is laterally enlarged; a mounting therefor; socket means for said base; said lateral enlargement being betweenand in engagement with a portion oi said socket means and said mounting; resilient means; acting through the intermedlatlon oi said socket means, to press said lateral enlargement against said mounting; and means whereby rotation of said base 'causesan increase in the bias of said resilient means. a

9. The combination with an incandescent lamp whose base has a lateral bayonet projection; of a mounting'thereior; a socket receiving the base of said lamp and having a bayonet recess that receives said bayonet projection, said mounting being positioned to be also engaged by said projection which is interposed between said mounting and seat; and a spring pressing the socket upon said bayonet projection, and through the intermediation oi the socket, pressing the bayonet projection against said mounting.

10. The combination with an incandescent lamp the center of whose lighting fllament is upon the lamp axis and the base of which lamp 60 has three bayonet projections in a plane that is perpendicular to the lamp axis; of a parabolic reflector; a socket receiving the base of said lamp and positioned by the reflector to bring the ,ing these projections against said reflector, the

spring engaging the reflector at at least three places around the axis of the reflector. A,

11. The combination with an incandescent 1'5 lamp, the center of whose lighting fllament is upon the lamp axis and the base ot-which lamp is laterally enlarged at at, least three places spaced around the axis of the base in a plane perpendicular to the lamp axis, of a parabolic reflector, a socket receiving the base 0! said lamp,

- the lateral enlargements oi the lamp base being between a portion of the socket and said reflector, and a spring carried by the socket pressing the socket upon the lateral enlargements ot the lamp -base and through the intermediation Y of the socket, pressing the lateral enlargements 01' the lamp base against the reflector, the spring engaging the reflector at at least three places spaced apart around the axis of the lamp base.

12. The combination with an incandescent lamp whose base is laterally enlarged; oi a mounting therefor; a socket receiving the base of said lamp, the lateral enlargement of the lamp base being between a portion of the socket and said mounting; and a spring pressing the socket upon the lateral enlargement oi the lamp base and, through the intermediation oi the socket,

' pressing the lateral enlargement'oi the lamp base against said mounting.

13.In combination: 'an incandescent electric lamp having a base; a mounting for said lamp; and means for connecting said lamp to said mounting including, a lateral extension on said base, engaging means for engaging said lateral extension; and resilient means acting to press said engaging means against said lateral extension to press said lateral extension against said mounting including, a lateral extension on said base, engaging means for engaging said lateral extension, said lateral extension being insertable between a portion of said engaging means and said mounting, .said portion of said .engaging means, before said insertion of said lateral extension, being at a lesser distance from said mounting than the thickness 01 said lateral extension, means acting to bias said portion of said engaging means toward said mounting; and means whereby rotation of said base to connect said lamp to said mounting causes said portion to move away from said mounting to permit said insertion of said lateral extension.

16. In combination: ,an incandescent electric lamp having a base; a mounting for said lamp;

and means for connecting said lamp to said' mounting including, a lateral extension on said base, engaging means for engaging said lateral extension, biasing means acting to press said engaging means against said lateral extension to press said lateral extension against said mounting, and means whereby rotation of said lateral extension about the axis of said lamp causes increase in the bias oi said biasing means. 17. In combination: an incandescent electri lamp having a base; a mounting ionsaid lamp: and means for connecting said lamp to said said lamp causes said engaging mounting including, a lateral extension .on said base, engaging means for engaging said lateral extension, said engaging means being movable with respect to said mounting, biasing means acting to press said engaging means against said lateral extension to press said lateral extension against said mounting, and means whereby ro tation of said lateral extension about the axis of means to move away from said mounting.

18. In combination: an incandescent electric lamp having'a base; a mounting for said lamp; and means for connecting said lamp to said mounting including, a lateral extension on said base, engaging means for engaging said lateral extension, said lateral extension being insertable between a portion of said engaging means and said mounting, said portion of said engaging means, after said insertion 01' said lateral extension, being at'a lesser distance from said mounting than during the insertion of said lateral extension, means acting to bias said portion of said engaging means toward said mounting; and means whereby rotation of said base to disconnect said lamp from said mounting causes said.

mit withdrawal of said lateral extension from between said engaging means and said mounting.

19. In combination: an incandescent electric lamp having a base; a mounting for said lamp; means, for connecting said lamp to said mounting including, a lateral extension on said base, en-

. gaging means for engaging said'lateral extension,

' in mounted position.

20. In combination: an incandescent electric lamp having a base; a mounting for said lamp;

. portion to move away from said mounting to per- 1 means for connecting said lamp to said mounting including, a lateral extension on said base, engagingmeans for engaging said lateral extension, resilient means acting to press said engaging means against said lateral extension to press said lateral extension against said mounting, said engaging means and said resilient means comprising a unit, and means including a bayonet connection for connecting said unit to said mounting. s

21. In combination: an incandescent electric lamp having a base; a mounting for said lamp;

meansfor connecting said lamp to said mounting including, a lateral extension on said base, engaging means for engaging said lateral extension, resilient means acting to press said engaging means against said lateral extension to press said lateral extension against said mounting, said engaging means and said resilient means comp ing a unit, means including a bayonet connec ion for connecting said unit to said mounting, and means for latching said bayonet connection against unseating rotation;

. 22. In combination: an incandescent. lamp. having, a base; a reflector for said lamp, provided with an aperture, in alinement with said base; said reflector being provided with a plurality of auxiliary apertures disposed about the axis 01 said base; said base having means adapted to positionsaid lamp in a predetermined position; means having portions disposed throughsaid auxiliary apertures and adapted to engage said positioning means with said portions; and resilient mieans acting to press said portions in a direction toward said reflector against said positioning means, to thereby press said positioning means against said reflector.

23. In combination: an incandescent electric lamp. having a base; a reflector for said lamp; said base having laterally extending positioning means, adapted to register with said reflector; pressing means detachably mounted with said reflector, said pressing means having parts overlying said positioning means and constructed and arranged to press against said positioning means; and resilient means constructed and arranged to cause said parts to press said positioning means into said register.

24. In combination: an incandescent .electric lamp, having a filament and a base; a reflector i'or said lamp, presenting toward said fllament a side having a reflecting surface; said base having laterally extending positioning means, adapted to register with said reflector at said side of said reflector; pressing means adapted to press against said positioning means one of said means being provided with bayonet slot means and the other with projection means adapted to cooperate with said slot means; and resilient means constructed and arranged to cause said pressing means to press said positioning means into said register.

25. In combination: an incandescent electric lamp; a mounting; socket means and base means for said lamp, said socket means and base means being constructed and arranged for bayonet connection with each other, one of said means being provided with one of the elements of said bayonet connection and the other oi said means being provided with the complementary element of said bayonet connection; said mounting being positioned to be engaged by the base means element of said bayonet connection; and resilient means constructed and arranged to press the socket means element of said bayonet connection against-

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