US1261784A - Reflecting-lamp. - Google Patents

Description

H. A. DQUGLAS REFLECTING LAMP. APRLICATIQN HLEU res. I9. lau.

Patented Apr. 9, 1918.

UNITED sTATEs PATENT OFFICE.

HARRY A. DOUGLAS, OF BRONSON, MICHIGAN, ASSIGNOR T0 DOUGLAS & RUDD MFG. CO., 0F BRONSON, MICHIGAN, A CORPORATION 0F MICHIGAN4 REFLECTING-LAMP.

Application filed February 19, 1917.

To all wlw/1L 'it may concern.'

Be it known that l. llamar Doiiums, citizen ot' the United States, residin at Bronson, in the county of lil-anch and tato of Michigan, hare invented a certain new and useful Improvement in Refiecting- Lamps` of which the Following is a full, cleat'. concise. and exact deseri ition.

My invention relates to rcfiecting lamps, some features of the in\'ention being ot' particular utilityr in eoniiection with electric lamps. The invention has for its object the provision of improved mechanism whereby the light` lsource. ot' the lamp may be adjllsted in and out with respect to the retlector land where the intention is embraced in an electric lamp l also provide improved means for switching the lamp in and out of circuit. The mechanism that is employed for adjusting the light source such as a lamp bulb and the mechanism which is ernployed for switching the lamp into and out of circuit' preferably includes operating parts that are common thereto.

My invention in its various aspects will vvloe fullyexplaintal in connection with the accompanying drawing and will he defined in the claims. In the drawing, which shows the preferred emliodimeutof the invention as employed in electric lamps, Figure. V1 is a side elevation, partiallyY in section, of a reecting lamp eontainiing features of my invention; Fig. '2 is a longitudinal View, partiallytin section aud partially in elevation, of portions of the structure illustrated in Fig. 1; Fig. 3 is a view on line. 3 3 of Fig.

6; Fig. 4 is a `.Tiewon line 4-4 of Fig. 2;

Fig. 5 is a view on line ."i-fi of Fig. 2;*and Fig. 6 is a View on line 6-6 of Fig. 2.

Like parts are indicated by similar characters ofreferenc-e throughout the different; figures.

The concave reflector 1 is received intlio reflector carrying concave casing 2 here shown as distinct and spaced apart from the reflector, but to which construction the iu vention is not. to be limited. Vhen these elements 1 and 2 are separate they are coupled in any suitable Way, leaving a space intervening between the reflector and casing. The reector includes a rearwardly extending tubular colninuatnion 3 in fixed relation with the balance of the reflector, this continuation constituting a holder or mounting. A spring tongue 4 is integrally formed with Specification ot Letters PatentA rau-.lined Apr. 9, 1918.

serial Nu. 149,665.

t projecting therefrom which is narrower" than the, balance ot' the tongue and is slightly narrower than a slot 7 in the holder 5t whereby this portion may project into tbe slot to'prerent the. shell from turning with respect to the slot. while at the saine time the .side n'iafrgins of the tongue 4 are adapted to press against` the side margins of the slot` 7. The tongue thus presses upon a surface olA the holder i3 and. where there is but one tongue` forces the .shell toward the opposite side oi the holder wherebyl the Ishell is held in engagement with the holder 3. The slot T is elongated-so that the shell 5 may be moved back and forth in its holder 3 whereby in the structure illustrated the position of the lamp bulb 8 which is carried by the forward end of thc shell in front of the reflector may be adjusted with respect to the retlector. 'Ihe base 9 ot the lamp bulb 8 constitutesl the forward Contact carrier and as the arrangement illustrated is a double pole arrangement this contactcarrier 9 carries two rear contacts ltl and 11. The lamp base or contact carrier St is provided with bayonet pins` 12 engageable within bayonet seats 13 constituting parts of bayonet slots 14. The rear contact carrying plug 15 within the easing 2 is provided with terminal blocks 16 lmving binding .screws 17 hy, .which circuit. wires may be secured to the terminal blocks.

These terminal blocks are cylindrical and the forward ends thereof are tubular, springs 18 being included in the tubular p0rtions of thc terminal blocks and operating to press contacts 19, 20 forwardly into engagement,` with the contacts 10 and 11,.all of these contacts being Within the casing. 'Ihe springs 18 and the contacts 19 and 20 thus not. only serve to establish circuit for the lamp but also operate to hold the lamp base. 9 in bayonet pin and slot connection with the shell 8. ...a

The plug 15 is rotatable Within thc-rear end of the shell 5 in order that it may perform its switching function and when thus movably mounted it is provided with bayonet pins 21 and which are receivable in alternate bayonet seats 22, 23, shown in Fi 2 and 3, the, plug being inserted from te front end of the shell with its )ins passing along the` bayonetslots 14 until1 they are in the zone that includes the bayonet seats 22, 23 whereafter the base of the lamp bulb is inserted in the shell with its ins- 12 placed in the bayonet seats 13. 'l e springs 1H thus not only serve to hold the bayonet pins 12 in the seats but also serve to hold the bayonet pins 21 in the seats to which they are adjusted.

lt will be observed that the complemental switching contacts 10 and 19 are eccentric with respect to the shell as are also the coinplcmental switching contacts 11 and 20 so that as the plug is turned these contacts are either brought ,into engagement or are separated according" to the direction ot' movementof theswitching plug 15. When the lamp is in open circuit the contacts 1t) and 20 are pressedagainst the insulating portions of the lamp base that are adjacent the contacts 10fantt 11, the springs 18 continuing to press the contacts 19 and l0 forwardly to maintain the bayonet pins upon the switching plug and upon the lamp hase. in the their respective bayonet seats. t The. shell and the parts within it are in front oi the casing 2 and in order that the switching plug 15 may be turned `or otherwise, moved with respect to the lamp base to cut the lamp in and out of circuit I employ a inotion transinittingli)r connection, preferably in the form of a switching rod 21, which is conr nected at its inner end with the switching plug and which is oierable from the exterior of the casing. lie outer end ol thisl switching rod d sirably has a gripping head piece 25 assembled therewith. 'lhe head iece 25 has an insert 26 which has a square ore. The outer end of the rod 24 is correspondin ly sqnareso that the rod may be moved ongitudinnlly with respect to the head piece but will turn therewith. corners of the square end of the rod are threaded and have. threaded engagement with the threaded bore of the sleeve 27. This-sleeve is received within a cylindrical seat 4formed in the. guter end of the head piece 25. The spring 27 engages the )lug 15 at one end and the inner surface-od the handle V21 at the other end and operates to hold the sleeve in engagement with the head piece and, through the intermediation of tho sleeve, the spring operates to hold the head piece in enga' ement with the back end of the handle 2. y this arrangement li'otli the head piece and the sleeve areconlined in a single plano of rotation whereby the former may alone cut the lamp in and out of circuit and the latter may alone move the shell and the lamp bulb in and out, the sleeve being rotatable with respect to the head piece. The particular form of lam illustrated is what is known as a spot light but to which form ,of lamp the invention is not to be limited. When the lamp is in the form of a s ot light the back element is provided wit` a'handle 21 and this handle I preferably constitute a rearward continuation of the casing, the switching rod 24 passing throu h the handle to a oint where it is operable rom the exterior o the c'asing.

Any suitable means may be employed for establishing circuit relation between the contacts upon the plu 15 and the external source 'of current, t; ere being 'illustrated a well known form of connector 151 which may be employed for this purpose.

Certain features'of novelty herein 'flisclosed are claimed 1n my co-pending`appli catipn Serial N o. 149,664, filed February 19, 191

lVhile I have herein shown andparticu lai-ly described the preferred embodiment of my invention I do not wish to be limited to the precise details ot' construction shown as changes may readily be made without departing from the s )irit of inyiinvention, but havingr thus described my invention I claim as new and desire to secure by Letters Patent the followingz- 1. In a retiectinggl electric lamp, the combination with a ieliector carryingr casing; of an electric lamp bulb; a shell carrying the lamp bulb at its front end and having bayo net pin and slot connection with the base of the lamp bulb; ecccntrieally disposed switclr iin: contacts within the casing for cutting the lamp in and out of circuit; a plug 'Within the casingr and mounted to turn in the shell to have alternative positions to cut the lamp in and out of circuit and having bayonet pin and slot engagement with the shell in the alternative positions of the plug; a rod extending from said plug and operable from the exterior of the casinf: for turning the plug; spring means for ho ding aid contacts in engagementto establish circuit und operating to hold the plug in circuit openin and circuit closing positions; a head piece or the rod and en aged with the easing to confine it to a sing e plane of rotation, said rod being movable 'longitudinallyand with( respect to lthe he'ad piece and turning with the head iece in its v: icas positions with respect t creto; a rotatable sleeve in threaded engagement with the rod;

and a spring for maintaining the sleeve in t engagement with the head piece.

2. In a reflecting electric lamp, the combination with si reflector carrying casing; of an electric lamp bulb; a shell carrying the lamp bulb at its front end; a contact carrying plu r within the casing and coupled with the shell for supplying current to the lamp and mounted to turn with respect to the shell to cut the lamp in and out of circuit, there being engageable eccentrically located switching contacts in the lamp circuit,. one upon the plug; a motion-transmitting rod extending from the pln'; and ope ible from and n spring for maintaining the sleevein engagement with the head` iieee.

3. in a relieeting niectrie amp. the eonihination with a reflector carrying' easing; of an Aeleetri(` lamplbulb; a shell earrlyiiier the lamp bulb at its front end und having bajo net in and slot connection with the base of the ainp hull); ereentrieaiiydisposedswitei1 ing eontaets within th/e raving for cutting the lainp iu and out oi` eil-enit; n ping within the ensing' and mounted to turn in the shell to lia-re alternative positions to ent the laulp in and out of cil-ruit and havingl hayonet pin and' slot engagement with the shell iu th'I alternative positions ot' the plug: u rofl e.\'tenrlin;r-fron| said plug and operable from 'thia exterior of the easing for yturning the plug; .spring means for holding said eruitaets in engagement' to eslahlish rireuit and operating;1r to hold the ping in eircnit opt-nin;r and circuit rinsing positions: a heud pier-e for the rod and engaged with the easin; r to confine it to n single pinne-ul' rntation. lsaid rod heini;l movable longitndinally and with respeet to the heini piece and tn ruilu.Ir with the head piece inl its various positionsJ with respect thereto a rotatable sleeve in threaded engagement with the rod; and a spi-ingr t'or maintain'ingthe sleevel in confinement with the head piece and for maintaining the `head` )ieee in engagement, with the rasiner throng the interinwiiation ol' the sleeve n.lherehy the sleeve and head piece' are prevented from moving bark and forth.

4. Tn a reliectinlgr electric lamp, the combination with a reflector carrying: casing; of 'an 'eier-trie lamp huih; a. shell eairrying` the lump huih at, its 'front end; a contact carryin; r piu.;r within the easing and coli-pied with the shell for snpplyng current, to the lamp :1nd mounted to turn with inspect to the shell to eut the lainp in and out, of circuit, there tiring engngreahie eceentrir-,aily ioratefl switching eontaets in `the lamp eireuit. one upon the plug; a motion-transmitting rod extendingr from tinI pill;r und operable from the exterior of the, easing to turn said plug: a head pir-re tortille rod and engaged with the casiin;r io eorilineit to a sin'grle piane of rotation, suifl rod being r ovahle loiuritudiL nelly and with respect to'the'head piece sind turning with the head piece. in its `vrtrious positions with respect; thereto; a rotatable Sleeve in threaded engagement with the rod; and a spring for maintaining the sleeve in `trie lninp lullh;

"ol' an eleel'rie lulu engagement ivitlr the head piece and for maintaining -the head )ieee in engagement with the casing.r through nl' the sleeve whereby the sleeve' and heurl pire-e are prevented from movingr back and forth.

5. ln a rellerting lnnip, the eolnhinution with a eelleetur rari-yin r casing; of nu eirctriehnnp lutih; a shel carrying the lanip hulh at its front end:,ereentrieally disposed eouiplenientar'\Y switching;r routaets within the easing for euttinn' the lamp in and ont` ot eireuit: a plug mounted to turn in the shell to hare alternative positions to ent. the Izonp in and out ot' eirrnit and haring hayouet pin :ind slot engagement with the sh'ell in the alternative positions ot' the plug: a rod eonneeted with said plug and projecting through the easing; a head pieee for said rod upon the exterior ol the easing: and n springy iiferposed hetween the easing u'lul the piuel and entrngriln.r these parts to innintaiu said head pieee in engagement with the exterior ol the easing'.

V. ln a ieilerling' lump. the eonihination with n l'elleetor ea|'r \'in; r raising; oi' un eiern shell ea|'|' \'in,' the lalnp hulh at; its front end: eeeentrically disposed eoniph-inenlari' switehilur rontaets within the easingr for cutting` the lump in nlul ont ot eireuit; a plug mounted to turn in the, -shell to ha i'e alternative positions and in netnatiug relation to one of said .switching t-ontaets: a rnd runner-teil with snid ping." nlul projet-tine' through the easing: a head piece t'or said rod upon the exteriorot' tlu` easing: and n sprintl interposed het ween they rnsinf: and the plu;r and engaging' these parts to maintain lsaid head pieee ineugageinent with the exterior ol' tire ."using. i

'i'.4 ln a relier-ting electric iainp` the, couiliination with a rellertor carri-"lng easing; boli); a Ishell carrying the lamp hnlh at its l'rmt end anrl having lwrv'fnet `pin und slot connection with the hase ot" the lamp hulh; eceent'rieally ,disposed switching contacts within' the easing {oreutting the. lamp in and out of circuit; a pine' within the yasingl and mounted to turn in the shell to have alternative positions to rut the iuinp in and out ot' circuit nml having bayonet; pin and slot eugragemel'lt with the shell in the alternative positions ofthe plug; a 'rod extending' from said ping and operable from the exterior of the rinsing loiturning: the ping: springs means for holding said eontaets in engagement to esthe intermediation tahlish eircuit and `operating to hold the' tiff t1. .vntf.

the lump bulb nl, its front end; e conlnct carrying pluo' within the casing and couple-rl with the tell for supplying current to thc lump und mounted to turn with re sport to the shell. to cut the lam in and out of circuit. there being engagea le eccentrieully located switching contacts in the lamp circuit, one upon the plug; u motion transmitting;r rod extending from the plugl and operable. from the exterior of the casing to turn said plug; u head piece for the rod; und u spring for mniutuiniug the head piece in engagement with the casing.

9. In u reflecting electric lmnp, the com bi nul ion with n reflector carryingr casing; of :in electric lump bulb; a shell cnrryin the lump bulb ut its front enrl nnrl having uyo net pin and slot connection with the base of the lump bulb; eccentricnlly disposed switchingr contacts within the casing for cutting the lump in and out of circuit; a plug within the casing and mounted to turn in the shell to have alternative positions to cut the lamp in und out of circuit und having bayonet pin und slot engagement with the shell in the alternative positions of the plug; a rod extending Vfrom seid plug and operable from the exterior of the casin for turning the plug; spring Ineens for olding said contac-ts in engagement to establish circuit and operatingr to hold the plug in circuit open ing and circuit closing positions; c head piece for the rod; a spring for maintaining the heart piece, in engagement with the casingr` said rod 'being movable longitudinally :unl with respect to the head piece and turn ing with the lieucl piece in its various posi tions with respect thereto; and means operable from the exterior of the casing for effecting movement of the shell and the lamp bulb in and out.

one upon the plug; a motion transmitting rofl extending from the plug and operable from the exterior of the casing to turn said plug; u hcnrl piece for the rofl; a spring for maintaining the bend piece in engagement with the casing'. said rod being movable longitmlinully und with respect to the head piece :intl turning with the head piece in its rnrious positions with respect thereto; and means operable from the exterior of the Cusing for effecting movement of the shell and the lmnp 'bulb in and out.

11. In e reflecting lamp, the combination with e reflector carrying casing; of an electric lamp bulb. n shell carrying the lamp bulb at its front end; eccentrically disposed complementary switching contacts within the casing` for cutting the lamp in and'out of circuit.; a plug mounted to turn in the shell to here alternative positions to eut the lmnp in und out of circuit; a rod con* necterl with said plug; n head piece for said rofl upon the exterior of the casing; und n `spring interposed between the casing and the plug und engaging these parts to main tuin suitl heed piece in engagement with the casing.

In witness whereof, I hereunto subscribe my name this 29th day of January A. D.,

l l HARRY A. DOUGLAS.

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