US1574050A - Automobile spotlight - Google Patents

Description

Feb, 23 1926. 1,574,050

H. E. MONTGOMERY AUTOMOBILE SPOTLIGHT Filed March 3l 1924 2 Sheets-Sheet 1 4 ATTORNEYS Feb. 23 1926. 1,574,050

l H. E. MONTGOMERY AUTOMOBILE SPOTLIGHT Filed March 3l 1924 2 sheets-sheet 2 ATTORNEYS Patented Feb. 23, 1926.

l HUGH E. MONTGOMERY, OF CHICAGO, ILLINOIS.

AUTOMOBILE SPOTLIGHT.

Application iled March 3 1, 1924. Serial No. 703,203.

To all whom t may cof/wem:

Beit known that I, HUGH E. MoN'rGoiirnur, a' citizen of the United States, and resident of Chicago, in the county of Cook and l State of Illinois, have invented certain new and useful Improvements in Automobile Spotlights, of which the following is a specification.

My invention relates to improvements in spot lights and it consists of the constructions, combinations and arrangements herein described and. claimed.

An object of the invention is to provide a spot light which is operated by the turning of a handle to throw a beam along a vertical or a horizontal plane.

A further object of theinvention'is to provide a spot light whichA can be rotated horizontally and tilted vertically by the use of onlyone-shaft extending through the car Other objects and advantages will appear in the following specification, 'reference beying had to the accompanying drawings, in which-- 4- l v l .Figure 1 is. a perspective view of the im.

proved spot light. l y

Figure `2 is a vertical section ,taken on the line 2-2 of Figure 1.

. Figure 3 i's a horizontal section of the spotlight taken on the line 3 3 of-Figure 2.

Figure 4 is a vertical horizontal section takenv substantially on the line H of Figure 2.

Figure 5 is a detail perspective viev.V of

.the fixed horizontal standard.

a plan view of the movable illustrated.

. Figure'S is a detail lsection on .the line .8 8 of-Fi'gure 4, showing how the straight teeth of the shaft pinion arefslidably in mesh with thetapering teeth ofthe .'ing gear.

Figure 9 is a front elevation of the movan ble lamp standard.

Figure 10 is a section of said standard on the line 10- 10 of Figure 9; y Figure 1l isa `detail section of the electric current switch .inside oflthe fixed standard.

Figure 12 is a detail section of the adjust-- able ball bearing of the lamp head.

the diameter of the standard.

is made of a tubular standard 1, preferably cylindrical, which has a flange 2, circular or otherwise, provided-with a suitable number of holes 3 through which screws 4 are driven to fasten. it. in a horizontal position on the outside of a motor` vehicle. intended to represent a part of the motor vehicle, whether this be of wood or metal. It is easily conceivable that this flange may be mounted upon the lower front glass,

' means other than screws being then used. A

circular enlargement 5 at the free extremity of the standard l provides a head against which a somewhat corresponding head (i of the movable lamp standard 'l'V is revoluble when the lamp 8 is rocked in the vertical plane. The standard 1 is cut away at 9 at the place where-the head occurs providing a recess vof a depth approximately one-half This reess is` occupied bythe head of the vmovable standard, the arrangement being such that there is a close joint fall around as is obviously necessary.

A spring 10 keeps the edge of the movable head 6 tight against the edge of the fixed head 5.- AThis spring is disposed upon a stud l1 which is suitably fixed at the base o1' the lhead 5 andA projects outward therefromA (Fig. 5). The -head 6 turns upon Athe stud. The extremity is threaded, and when the nut The wall W is l 12 is screwed in place the cup 13 is pressed against the spring 10. The resulting tension of the spring acts against the wall 14 of the receptacle 15 and ultimately presses the edge of the movable head 6 against the head 5 as already stated. The receptacle 15 is a part of Athe movable head as can readily be i seen (Figs. 2 and 3). A thimble 16, screwed into the end of the receptacle 15, both conceals the nut 12 and holds itin position upon the stud. There is not room 'enough between the nut and the thimble to permit the nut to work oil. A spring 17 on the base of the receptacle lpresses against a clutch- 18 to' normally keep the teeth 19 in. locked engagement with the teeth 20 of a ring gear 21. The ring gear is circular as its name implies. It has teeth on both sides of the ring portion. The teeth 20 are the' clutch teeth.

' Ihe teeth 22 on the opposite 'side arthose by means of which the ring gear is turned by tbemeshing lteeth 23 of the operating shaft ,24. flange 25. .I n carrying outvthe invention provision The ring gear includes a circular cular groove or recess 26 formed4 by a rabbet around the inner edge of the movable head 6. This groove or rabbet provides the bearing for the ring gear. The spring presses i 5 the movable head toward the circular flange of the gear, but by properlymachining the parts there will be suilicient clearance to prevent such binding upon the gear as will make turning difli'cult. Theturningis done l0 by the pinion 23. 4When the clutch 18 is .1n engagement with the ring gear, as 1t nor- I mally is, a. turning.- ofl the shaftj24 will causea corresponding turning ofthe clutch,

the circular head, 6, the standard.7 VAand the lamp 8; This turningwill be inthe plane ofthe axis of the standard 1, in other words,v

an up anddown motion of the lamp 8. Bodily turning of the head 6 with. the

. clutch 18 is produced by keys 27 (Figs. .2, 9 2Q and 10) with which' the clutch has s lidable engagement in grooves 28 (Figs. 2 and 6).v However, when the clutch 18 is disengaged y from the'rng gear 2,1, a turning of the shaft 24 willresult in a turning of ther-ing gear' only, and this in turn revolves tlielamp in the horizontal plane. 4.

Disengagement of the clutch 18-from the clutch teeth 20 of the ring gear iseflected byfpushing the operating shaft 24 outward` in the direction of the arrow A (Fig. 3).-v

The tip of the shaft is tapered at `29. The

upper and confronting portion o f the clutcll is beveled at 30. lVhen the surfaces 1nentioned'meet uponspushing the shaft outward as stated, the result is a displacement of i the clutch 18 to the'right upon the receptacle `15 (Figs. 2 and 3) against thet'ension of the spring 17. This position of the clutch is maintained long as there is pressure on the shaft 24,'and obviously the clutch teeth l19 and 2O remain disengaged .so that `the y ring'gear may be turned freely.

.at thisfp'oinf, a is to be noted4 that the displacement of the clutch 18 takes' place in respect, to thering gear 21. The ring gear isimaintained in --posltion by the en- 1 gagement of. the flange 25 with the groove 26.l This engagment is described as the bearing for thering gear, but additional bearing for the ring gear is provided by its mounting upon the hub 31 ofthe clutch;

'Ehe bevel 30 is formed 4upon a reducedv prominence 32 at one side of the ,hub (Figs. 3 and 7).

Nowas to the turning of the lamp in the horizontal plane: 'A' shaft 33 in the movable 'standard 7 (Fig. 2) carries a.pinion 34- Which meshes with the ring gear 21. Tn-

"l y. asmuch as the pinion 34 engages on the j same side ofA the ring gear 21 that is engaged by the clutch 18 vit'becomes necessary to cut` Vthe clutch away at 35 (Fig. 6) to provide`a, chamber in which the pinion-turns. f It must be remembered that the clutch 18 does not revolve; it merely slides back 'and forth on chamber inasmuch as it 1s occupied bythe ,contact 37 tothe bulb.

the keys 27 and the chamber' 35 always i in the same relative position in respect to the pinion 34. It must also be borne inmind does not show, it being in a pIaneabOVe The pinion 34 is `hollow top pgevid chamber 36, properly knownl asa conta fixed electrical contact 37 and the 4movable electrical contact 38. The latter is carried by a boss 39 formed on that sideof the clutch'v that Figure 3 is takenatright angles-to` Figure 2 and for that reason the Vpinion 3 4l 18v where the chamber 35 occurs (Fig. 6)'.

The boss is necessarily smaller than the chamber 36 to permit the limited movement of the 'clutch 18 when sliding it'vfroi'n en? gagement with the ring gear teeth 20. This sliding of the clutch is not'suiicien't to disengage the contacts 37 and 38,' thesealways remaining in engagementv Aand rubbing' against eachother when the lampisv being Current is1 supplied to the incandescent bulb 4 0'from the usual source carried by the automobile (not shown) y means ofa wire 41 which runs to the In vable contact 42 of a switch 43l (Fig. 11) 'inside ofthe fixed standard 1. The contact 42 engages a fixed contact .44 uponV depression 'of the switch button'45 (Figs. 1 and 4), whereupon one The wires 41 and 45 are positive. The current from the bulb 40.has a grounded" return as is customary in all automobile lighting practice. A wire 49 leads from the .The shaft 33 has abore through which the wire '49 passes. A cone 50 on the shaft 33 engages the Aballs 51 in the bearing sleeve 52. AThis sleeve has an` ample V-shaped groove 65 the str-aight walls of which` particularly the upper. wall (Fig."12) being of a slightly greater inclined angle than that ofthe cone 50. The sleeve 52 is suitably fixed inside of the-movable standard, the

shaft- 33 being held in'thecentral-position 'by the wedging action of thev balls .between the ballrace's. These provide l,a perfect fit ,both radially and axially when the inverted cup is seated on the gear housingy The.

shaft carries the inver-ted clip. 54,re'ferred to. The edge of this cup bears'on the rim ot'A Ythe-standard 7 and thus providesa support `for the'larnp structure above.- This cup is 'held in place on tli'e'shaft. as show ni 'Several pins 66,- carried by .the inverted cup, engage' the floating ball retaining ringV 67 and are heldin such engagement by nuts 55 and 68, the latter being a liam nut. Both are screwed upon the threaded end of the'shaft, A knob or handle 56 on the end of the operating shaft 24 provides for both pushingand turning the shaft. The shaft is turned when it is desired to rock the spot light 8 vertically; it is merely pushed outward and then turned when it is desired to move it horizontally. The inner end of the operating shaft 24 is fixed to the knob 56 y by means of a cap '57. which, when screwedv in place, so contracts upon the end 58 of the shaft that the parts are clamped in position (Fig. 4). The-knob 56 has a hollow hub 59 which is deep enough to permit the necessary ,motionof the knob in respect to a fixed sleeve 60 when the operating shaft 24 is pushed outward.

This sleeve is screwed into` the flange 2 and is thus held in a rigid position. The shaft 24 worksinside of thesleeve. The sleeve carries a small plate 61 inxwhich the rod of the switch button .45 has bearing.

This plate is 'clamped upon the sleeve 60 by means of a bushing 62 and a circular nut `63 which is screwed thereupon; Y

A The yonemrz'na. i Turning the knob 56 causes the spotlight Sto Arockin the vertical-plane. A turn of the knob to-theright (assuming the operator tof nbe"facingvfthe knob in' -Figure 1) causes the light`8 to incline downward; a

vturn to the le-ftcauses the lamp lto incline v upward. 4Rapid. f right land left turning -left in the horizontal plane.

causesthe lamp to reciprocate.

It the operator firstpushesfoutward on the knob 56 and then turns the ysame to the right, the spotlight 8 will swing toward the e Conversely', a; left turn of the knob 56 will swing the lamptothe right," v p Consider 'these vtwo actions separately.

.The outer end ofthe operating 'shaft 24:

" terminates 'in a spur pinion 23 and a tapered end 29. v The spur pinion constantly meshes with theteeth 22 of a ring gear 21. This gear hassiinilar teeth 2O .on the opposite side (Figs. -2 and .3), and with thesea clutch 18 has normal engagement by virtue of the pressure of aspring 17 at the opposite'end of the clutch.V The clutch can slide but understand that when the non-turnable clutch 18-engagesthe ring gear 21 so that` ginm'ng of this subject. Consider now the second action: Upon pushing outward on the knob 56 thetapered end 29 of the operating shaft will meetv the bevel 30 of the clutch and cause the lateral displacement of the clutch so that the clutch teeth 19 and 20 are disengaged. Subsequent turning of the pinion 23 causes a turning of the ring gear independently of the clutch, and this turning is transmitted to the lamp 8 by way of the lamp pinion 34; which meshes with the ring gear 21 at a place 35 in clutch 18 where the adjacent part vof the clutch 18 is cut away.

The teethv 22 and 20 of the ring gear are of the familiar tapering formation. The problem of' sliding the pinion 23 in respect to the teeth presents itself, but is overcome by the arrangement illustrated in Figure S. The sides of the teeth in the pinion 23 are substantially straight and of a thickness no greater .than the narrowest width ot the spaces between 'the teeth of the gear 22. The reader can readily see that with such an arrangement the pinion 23" is readily :lid back and forth without jamming in the gear 22.

.A point to bear in mind in connection with the sliding of the'pinion 23 is this: Itis not necessary for the operator to continue outwardpressure on the 'knob 56 when -he desires to turn the lamp 8 horizontally. The pressure of the spring 17 is at right angles to the axis of the operating shaft 2d, the' result being a lateral pressure on the tapered end 29 when the clutch 18 is in place and a tendency to hold the shaft in the extended position. The angles of the tapered end, 29 and of the bevels 30 are hardlyabrupt enough to forcethe shaft 24 back to position under the tension of the spring 17. In reference to the ball bearing of the lamp head: This bearing is adjustable asr will readily be seen in Figure 12. Screwing vdown on the nut fixes the bearing balls in the proper position in reference to the sleeve 52l and cone 50. ing illustrated is well adapted to keep the 'shaft or spindle 33' in the desired central osition. The sleeve 52 is permanently vxed within the standard 7. The lamp 8 is soldered or othemvisesecured up'on the cup 54. The shaft 33 has a nonrotational fitting in the cu 54, for which purpose `the upper end o' the shaft may be made noneircular. Preferably the cup 54- and shaft 33 are made in one piece. Thus, parts if? and 52 are integral and parts 54 and 8 are also integral with-shaft 33. The hold it `eannottilrn, and-a' turningmovement ising'together of the various parts depends imparted to the ring gear bythespur pinion 23, something must yield. It is the movable standard 7 that yields,`^the entire ring gear 21, Aclutch 418 andi head 6 tlien turning upon the, fixed 'stud 11 as 'described'at the bevupon 'the balls 51. 67 is held down -by a number of pins 66 The vball retainer ring `unscrevving thel nuts o5 and 68 the ring 67 is allowed freedom to move upwardly so that the.balls 51 passv inwardly to the smaller part of the ball race. The -pins -66 are the samegear teeth to keep the gear fromI turning, a second gear on said ring engaged' pulled out Hush Withthe inside of. the-cup 54 thereby sufliciently loosening the ring 67 so -that the balls may pass beyond the upper andinner ridge-of lthe groove v and the various parts concerned may be disassembled. The particular combination shown is Vvery easy to assemble and adjust, as Well asl to manufacture inpracti'ce inasmuch as there are no -parts which lrequire greataccuracy.

- As stated before,- the wedge action of the i ballsy betWeenthe--two ball races provides a perfect fitboth radially and axially When the inverted cut is once 'seated on the gearhou'sing.

Thile the lconstruction andi'arrangeinent' ofthe improved automobile spotlight as herein described andelaimed is that of a:

enerally preferred form, obviously mod'i cations and changes maybe made Withoutdeparting from the spirit of the invention,

or the scopeof' the appended claims;

I ,claimz- 1. A spotlight' comprising r'a lamp, `a

standard by which it is carried, a fixed standard upon which the l lamp standard is movably mounted',` a single operating shaft,l a lampshaft having a pinion,- `a ring having av gear with which 1t constantly meshes, aselutch engageable. With bya pinion on the operatingshaft, means by which 'the clutch is keyed to the movable standard causing a rocking of the'standard and lamp in one plane upon mere turning of the-operating shaft, and means -by which the clutch is displaced to disengage the first teeth upon pushing the operating shaft, subsequent turning of the. shaft revolving the lamp independently on ,the movable-standard through the ring and first mentioned pinion. p

2. A spotlight comprising a' lamp,'a movablestandard upon which the lamp is movably mounted, a fixed standard by which the movable standard is rcarried, a double gear-faced img, an opei ating shaft having a pinion 'in mesh lwith one of the gearfaees, a slidable clutch keyed to the movable' member-and engaging the other gear face causing the movable member to 'rock when the operating shaft is turned. a lamp shaft havy ing a pinion. meshing with t-he clutch gear face, and associated means on the operat'v ing "shaft and the clutch for causing disons gagement of the clutch upon swinging-the shaft and a turning of the lamp vupon the inovablestandard upon subsequent. turning of the op,'eratingshaft.l

3. A -spotlightqcomprising' a, lamp, a

standardupon which the lamp is movably 'lamp' shafthaving'av pinion meshing with thel clutch gear, and.' associated, means Aon the operating shaft and clutch 'causing a disengagement of the elutchupon an axial movement ofthe shaft, a subsequent turna,

ing of the operatingl shaft rotating the ring gear, lamp shaft'pinion and lamp.;l

4. A spotlight comprising a lamp, a standard upon which' it ismovably mounted, said .standard having a. i'abbeted edge, a fixed standardv having a portion presenting anvedge eonfrontedby saidrabbet ,When the standards are fitted together, a 4double-gearfaed 'ring yhaving a circular fiange-occupy- `ing said rabbet to retain the ring in position, a slidablfcluteh, keys on the movable standard o'nffv'vhichthe .clutch isfslidable,

means to engage. the clutch With'one of the gear faces, an voperating ashaft having-,a pinion meshing with the other' gear face causing a rocking of the movable standard and lamp' upon turning` the operating shaft While said clutch is in engagement, the lamp shaft having a pinion meshing With Isaid clutchl gear, and associated means on the operating shaft and clutch, saidmeans in'- cluding taperedwand beveled portions re'- .spectively, for laterally displacing the clutch against the tension of said means upon' an axial movement of the operating shaft .permitting independent rotation of the ring, laip pinion and lamp.y

5. A spotlight comprising a lamp, a'standard upon Which itgis movably Amounted,a

iixedstandard moi/'ably carrying the lamp standard, means on the-movable standard' forming a receptacle having an end Wall',

means including a stud carried Vbythe fixed Y standard extending through said Wall which thus bears thereon, a double 'gear-facedring, a clutch bearing on the receptaclehaving a hub on which the ringis journalled and including a prominence having bearing on the stud, means 'including l a springt-disposed about the receptacle pressing the clutch into contactfwith the nearest gear fa'ce, ineaiis on the movable standard bnwhich the clutch ,is slidably keyed, an operating shaft having a pinion. inv mesh With the other gear face causing" a bodily rocking of the movable `standard upon lturning the shaft, a lamp shaft vhaving a pinion meshing with the clutch gear', and associated means on 'the shaft and prominence including tapered and vthe lamp independently beveled portions for laterally displacing the clutch upon axial movement of the shaft, subsequent turning of the shaft revolving standard. I

6. The subcombnation 1n a spotlight of a lamp, a grounded electric bulb in the lamp,

4 a shaft by which the lamp is turned, ya hol- -low pinion carried by theshaft, a ring having a gear with which the pinion meshes, a slidable but non-'rotatable clutch engageable with said gear to prevent the ring and pinion from turning, means to slide the clutch and thus free the ring, and electrical connections for said bulb, including aconductor passing through the clutch, a boss carried bythe clutch occupying the hollow pinion but being smaller `than the hollow part to permit the movement of the clutch, a cpntact on'lsaid boss at which said conductor terminates, and a wire leading from the bulb through the shaft to a companion c'on tact with which the other has permanentbut` movable engagement.

7. The subcombination in a spotlight comprising a lamp having a grounded -electric ulb,l a slidable clutch having a collector ring, a brush representing the terminal of an electric circuit engaging the ring in all positions of the clutch, a boss on lthe clutch carrying a contact Which has electrical con nection With said'ring, a shaft by 'which the lamp is turned having a pinion containing a chamber occupied by said' boss, said boss .beingsmaller -than the chamber to permit' sliding movement of the clutch, and a contact carried by the pinion in said chamber 'in electrical connection with the bulb, said contacts beingv large enough to remain in engagement at each position of the clutch.

i 8. The subcombination ina spotlight comprising a ring having a clutchgear, a circui lar flange on the ring, a slidable clutch hav ng a hub upon which the ring has bearing, means to press the. clutch into' 'engagement with lsaid gear,means to reversely move the.

clutch against ,the-tension of said means to release the ring, fixed and movable standards between which the ringis held in'posi-v tionby means of said circular flange, and a lamp carried by the movable standard adapted to be actuated through said movable standard according to the positions of said clutch. A,

' 9. The subcombination in a spotlight of-a fixed standard having a stud, alla'mp, a movable standard carrying the lamp and being turnable on the stud, keys formed` on part of the standard', a clutch slidable on the .stud and being engageable With said keys, a ring having gears on opposite faces one `of of the movablea tapered end on the shaft, and a beveled prominence on the clutch by which the clutch is displaced upon axial shifting of the shaft. said pinion being slidable over the last gear Without disengagement.

-10. The subcombinationin a spotlight of -a fixed standard having a stud, a movable standard turnable on the stud, a clutch slidable on theY stud and engaging keys in the movable standard, a ring having gears on opposite facesA one of which is-engaged by the clutch, an operating shaft having a pin- Iion meshing With the other gear and causing bodily "turning of the movable standard by virtue of said clutch, a tapered end on the shaft, and a beveled prominence on the c-luteh by which the clutchI is displaced upon axial shifting of the shaft, said pinion be ing slidable-over the last gear Without dis- .engagement,'and a lamp shaft having a pinion in engagement with the ring gear which is then rotatable upon subsequent turning of the operating shaft. y

11. The subcombination in a spotlight of a lamp standard, alamp revolubly mounted thereon, a ring having two gear faces, a pinion meshing with one gear, an operating shaft having a pinion meshing with the other gear, a clutch engaging the first gear causing the standard and lamp to rock in one plane upon turning of the operating shaft, means associated with the shaft and clutch for disengaging the latter upon axial movement of the shaft to cause revolving of the lamp in yanother plane'upon turning of the shaft, and fixed means to limit the axial movement of the shaft ,including a ying a Wall at'one end through which the stud passes and open'at the other end, a cup fitted upon the stud, a spring situated between the cup and said Wall pressing against said wall and keeping the movable standard l seated against the fixed standard, means on the end of the stud abutted by the cup, and means fitted in the open end of the receptacle concealing said means.

13. T he subcombination in a spotlight 'of a'tubular fixed standard terminating in a circular head and having a portion cut away to provide a recess, a movable lamp standardhaving a circular hollowhead occupying said recess the edges of the tivo heads abutting, a stud mounted in the fixed head, means on the movable head constituting a receptacle receiving the end of the stud and having a wall bearing thereon, a cup mounted on the stud and fittinginside of the receptacle, means on the end of the stud against which the cup abuts, a spring situatedy in the space between the cup and .stud

C pressing against'the wall to keepsaid-edges in contaet,`and-means tted inside of the .receptacle also abutted by the cup and Con-v eeahng the aforesaid means.

i4. The subco'mbination in spotlight'of a lamp standard, a bearing sleeve carried thereby, a lamp having an'inverted cup support lit-ted down upon the sleeve, ashaft.

' 'carried by the supportand .having a bearing cone, lbearir'ig meansincluding balls sit'- uated between` the cone and bearing sleeve7 said'sleeve having a bearing surface situated atan angle-different from that of the,COI.1C,j

means Carried by the Cup extending into en`- 15. In a spotlight, a single operatingshaft'- having a pinionat the'end, a ringfhaving gears on opposite faces of which one meshes ivthl the pinion for turning of the ring, a clutch having a portion projecting through the ring into the path ofthe operating shaftI and including teeth engaging the other gear, a lamp, means by .Which-the' lamp is turnedi-neluding a pinion meshing with said Aother gear,V means upon which said clutch ring, means including aspring keeping the "Ieluteh inl normal engagement with the ring 4fory 4turning of the clutch with -the ring, and

means assoeiatedv'withgboth Athe shaft and leluteh `ineludirlg tapered and beveled poris `mounted to move at right angles' to the op'- 'verating shaft to either griporf-release the tions' causing a' ydisplacement of the elutch and release ofthe ring upon axial move# ment of the shaft, said portions being at such langles 'that the spring tension Will hold the eluteh'and shaft in position and the clutchin disengagement untilfthejshaftis returned. p d 16. In a spotlight a lamp a key, a turnable ring having a gear faee a lamp shaft havinga pinionimeshing with standard having r s aid gear face, a, clutch slid .in one direction upon the key-'to engagejthe gear. face-and normally prevent-turning of th/e ring, Said yeluteh being cut away providing a chamberto receive theu-plni'on, and a rotatable and shiftable operating shaft to turn said ring, irstbeings'hiftable to slide the clutch in the other direction toa-elease the gear face.

17. In; a spotlight anpoperatng sha-ft, a

movable standard carrynga lamp, a double gear-'faced ring, a spur pinion' on the o'perating shaft meshing with one ,gear face' of said rilfgto turn the ring, the teeth ot' the pinion being straight and Httingthe narrowestspaces between said gear teeth to permit axial sliding of the operating shaft, elutehvmeans engaging the otherI gear face 'Causing-rocking .of the standard upon s imply turning theoperating shaft, and ring, and lampoperating, means 'also engaging said other vgearmfaee causing turning of the standard upon first sliding.v theoperating shaft -to displaee the clutch meansthen turning the operating shaft.

HUGH n. MONTGOMERY;

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