US1507095A

US1507095A - Lamp for projecting apparatus

Info

Publication number: US1507095A
Application number: US393602A
Authority: US
Inventors: Theodore F Uhlemann
Original assignee: NICHOLAS POWER Co Inc
Current assignee: NICHOLAS POWER Co Inc; NICHOLAS POWER COMPANY Inc
Priority date: 1920-11-03
Filing date: 1920-11-03
Publication date: 1924-09-02
Anticipated expiration: 1941-09-02

Description

sept. 2, 1924. 1,507,095

T. F. UHLEMANN LAMP FOR vPROJEC'IING APPARATUS original iled July 2,"1920 2 sheersfsheez 1 Sept. 2; 1924.

`T. F. UHLIEMANN LAMP FOR PROJECTING APPARATUS Original Fired July 2, 19.20 Y2 Sheng-'sheer 2 Patented Sept. 2, 1924.

UNHTED STATES THEODORE F. UHLEMANN, F

GLEN noaas, POWER. COMPANY, ING., or New Yoan, N.

NEW YORK, ASSIGNOR TU NCHOLAE Y., A. GDRPORATION Cn DELAWaE."

LAMP FOR 'PBJECTING PPARATUS.

Application filed July 2, 1920, Serial No. 893,602. Renewed January 19, 1924.

vTo all 'whom it may concern.'

Be it known that I, Trmonoizn F. UHLE MANN, a citizen of the United States, and a resident of Glen Morris, Queens County,

L ng Island, New York, have invented new and useful Improvements in Lamps for Projecting Apparatus, of which is a specification.'

This inventionrelates to lamps for projecting apparatus, particularly incandescent electric lamps, and has for its object to provide a lamp of this character in which the light bulb and the reflector may be universally and independently adjustable, whereby the light and reiiector may accurately and exactly focus with reference to each other, and both may be focused with.

reference to the condensers of the optical system, notwithstanding irregularities in the placing of the lilament in the bulb. My invention also contemplates various improvements in the adjusting mechanism whereby the lamp and reiector may be easily and rapidly adjusted from without the lamp house` which improvements will be more readily understood romthe following description and appended claims.

In the accompanying drawings I have illustrated my invention applied to a lamp adapted primarily for the projection of motion pictures, and in said drawings Figure 1 shows the lamp in side elevation,

the enclosing lamp house being shown in section;

Fig. 2 is a plan view of the lamp with the light bulb and reflector removed: 1

Fig. 3 isv a side elevation of the rei-lector support and its adjusting mechanism with the rest of the lamp detached;

Fig. i is a ctional view on the line 4-4 of Fig. 3 with portions of the supports broken away for clearness of illustrationg' Fig. 5 is a side elevation of the bulb-adjusting mechanism with the rest of the lamp detached;

Fig. 6 is a sectional view on line 6-6 of Fig. 5 with .parts broken away for the sake of clearness. y,

Referring to the drawings, 1 indicates the base of the lamp house which is provided with theforks 2 for support on the usual sliding carriage, not shown. The lamphouse 3 consists of the usual sheet metal box of rectangular cross section with hinge top u and side doors 4 for affording access to thel the following vin Vwhich interior.' Thelfrontwall of the lamp house4 visprovided with a funnel 5 in which the condensers will be .nipported in the "usualmanner. 'v j Projecting upward from the base l through the bottomv of the lamp house are four fixed ears arranged in pairs, 6.y and 7, '7 on opposite'sides ofthe middle longitudinal line ofthe lamp house. In one 'pair of ears there is rotatably supportedanfad'f" justing rody 8,' the rod being held against longitudinal movement by a screw set in ione ofdthe ears and working in a groove inthe ro The rod 8 yis threaded near its'frontfend as indicated in Fig. 5, the threadedA portion cooperating with a correspondingly threaded hole through the corner of a supporting frame 10 for the lamp bulb. The lopposite a corner of the supporting frame is'supported 75 on .a similar adjusting rod 9, whichrod is 4 rotatably mounted in the other pair of ears 7 and similarly held against longitudinal movement. The portion of the rod 9 on which the frame 10 is supported is without threads, so that the rotation of the adjusting rod'c in its bearings will cause the carriage to he longitudinallyadjusted towardfand: away from kthe front wall of the lamphouse the condensers are supported,the carriage sliding on the rod 9 as a supporting guide. y l

The frame preferably comprisestwo, Us shaped cross membersethrough the lower corners of each of which the

rods

8 and 9 pass in the manner indicated in Fig. 5.; At the upper ends the two frames are connected `loy longitudinal webs/.i1 which may he in'- tegral with the lJ-shaped pieces and the upper ends of the front frame pieceare also preferably connected by a xed rod 122ertending transversely of the .frame and serving as a supporting guide for a soclr'etpieoe 13 in which? the bulb-supporting bracket is mounted for vertical adjustment, asfwill loe later described. In the upper ends of the rear frame piece there is supported fortransl verse adjustment a cross bar numbered i4,

this har lpassing through the socket piece 13 and being iixedly "connected thereto by screws 15, as shown Fig. 2. The rod le is adjusted by'means of an adjusting rod l@ extending longitudinally of the lamp house and projecting through the rear wall `there- U of, the front end of the rod having. a iurl' ling in the upper end of the rear frame piece 10 at one side thereof, the end of the rod rlF-ing immediately above the cross bar 14.

he adjusting rod 16 is provided with a spur gear 17 which' meshes -with a circular rack 18 cut on the end of the rod 14, whereby lrotation of the adjusting rod will shift the rod 14 transversely of the lamp house and with it the socket block 13 which is attached to the rod, the block sliding on the rod 12 which acts as a guide and a support.

The bulb socket is detachably mounted on i a bracket 18a projecting forwardly from the the end of an adjusting rod 23 mounted in a bearing 24 projecting from the rear wall of the block, the end of the rod projecting through a slot in the rear wall of the lamp house, thus providing for a certain amount of transverse motion upon actuation of the rod 16. The projecting ends of the'adjusting

rods

8, 16 and 23 are all pro-'vided with knobs 25 by means of which they may be easily rotated by the o erator to adjust the lamp support. The t ree adjustments, longitudinali transversely and vertically of the lamp house, give a universal adjustment to the light bulb whereby it may be accurately positioned with regard to the condense-rs to properly focus the light on the picture to be exhibited, notwithstanding irrcgularities in the position'of the filament in the bulb, therange of movement of each adjustment being sufficient to take care of the variations occurring in the ordinary bulbs of commercial manufacture.

The reflector 26 is also supported for ad justment in three directions. To this end the reflector is su .ported on a carriage 27 comprising two -shaped frame-pieces 28 generally similar to the frame-pieces 1() ot' the bulb carriage, the two pieces 28 being connected at their upper ends by integral webs 29, as shown in Figs. 3 and 4.

rl'he carriage 27 is supported on the adjusting

rods

8 and 9 in aposition to the rear of the carriage '10. The rod 9 is threaded through the carriage 27 while the rod 8 has an unthreaded surface at this point to act as a supporting guide for the carriage.

At the upper ends of the front frame 28 there is a fixed rod 30 and mounted for sliding adjustment in the upper ends off' Y the rear frame isa rod 31 which passes through and is attached to the bracket supporting block32 on which the reflector is mounted for vertical adjustment. The rod 31 is transversely adjusted by means of an adjusting rod 33 having a rack and pinion connectionwith the rod 31. Y

The reflector-supporting bracket 34 is supported in the block 32 by means of two vertical rods one of which has a rack and pinion connection with an adjusting rod 37 similar in construction and operation to the corresponding parts of the bulb-sup` porting mechanism. The reflector 26 .is atached tothe bracket 34 by lmeans of a rear- Wardly projecting stem set in a socket 3S at the top of the bracket. l The

rods

9, and 37 all project through the rear wall of the lamp housma slotin the wall being provided through vwhich rod 37 extends permitting it `a certain amount of transverse motion upon actuation of the rod 33and are provided with knobs 39 to fan. I

Oilitate their operation. the adjusting Arods ot both the 'bulb and reflector adjustments being preferably of several different lengths so that the knobs will not interfere with each other.

ly the above described adjusting mechanism, both the lamp and the reflector have a universal adjustment whereby any discrepancy in the focus of either the light filament itself or the reflected image of the filament may be quickly corrected by a parlia-l rotation of the adjusting rods which are all arranged without -the lamp house where they will not themselves get heated and not necessitate the opening of the lamp house or reaching in adjacent the lamp where the connections become unavoidably' heated.

I claim 1. In a lighting equipment for projection Y apparatus, the combination of a light sup port. a reflector support and means for independently adjusting said supports in thc same plane comprising a pair ot guide rods upon which both said supports are mounted, power-trangmitting connections between one. of said rods and one of said supports. and power-transmitting connections between the other rod and the other support whereby the adjustment ot each rod will effect the adjustment of one of said supports without adjusting the other.

2. In a lighting .equipment for projection apparatus, the combination of a light sup port, a pair of guide rods mounted thereon for independent rotation, a lamp supporting carriage mounted on both said rods, an having al threaded connection with one .of

said rods, a reflector supporting carriage independently mounted on both said rods and having a threaded connection with the other rod whereby the rotation of each rod will effect the adjustment of one of said supports without shifting the other.

3. In a. lightingequipment for projection apparatus, the combination ofra lamp supporting frame, a reflector support, means I for independently adjusting the supports in the same plane com rising a rods upon which both said sai supports are mounted, power transmitting connections between one of said rods and one of .said supports, power transmitting connections between the other rod and the other support whereby the adjustment of each rod will effect theadjustment of one of said supports without adjusting the other, means for inl dependently adjusting the lamp in a different pdane, comprising a cross rod supported for longitudinal adjustment in said lamp supporting frame a socket piece in fixed relation with said rod for supporting' the lamp, and connections for' e justment of said ro'd.

'4. In a, lighting equipment for rejection apparatus, the comblnation of a amp supporting frame, avrefiector support, means for independently adjusting the supports in' the same plane, comprising a pair of guide rods upon which both said supports are mounted,

power transmitting connections between one of said rods and one of said supports,l power transmitting connections between the other rod and the other sup ort whereby the adjustment of each rod wil effact the adjustment of one of said supports 'without adjusting the other, means for independently adjusting the lamp in a diiierent plane, comprisin a cross rod supported for longitudina adjustment in said lamp supporting frame, a socket piece in fixed relation with said rod for supporting the-lamp, connections foreecting ad ustment of said rod, means forinde endenty adjusting the lamp in a thir plane, comprising a' lamp carrying bracket. guide rods associated therewith and mounted for longitudinal movement relative to said socket.

air of guide.

eating ady supports, power transmittingiionuections between the other rod and the other su port whereby the adjustment of each rodpwill for independently adjusting .the lamp and refiector in a dierent plane, comprising cross rods supportedby iongitudinal movement in said lamp supporting frame and reflector support, respectively, a socket piece in fixed relation with the lamp adjustin cross rod and a bracket supporting bloc fixed to the reflector adjusting cross rod, and connections for imparting movement to'said cross rod. Y

6. in aV lighting equipment. Jor projection apparatus, the combination of a lamp supporting frame, a reflector sii'ppoi't, means for independently adjusting the supports in the same plane com rising a air of guide rods upon whichl th sai supports are mounted, power transmitting connections between one of said rods and one of` said supports, power transmitting connections between the other rod and the other supportwhereby the adjustment'of each rod independently adjusting the lamp and releo.

tor in' a different lane, com rising cross rods su ported for ion in said amp supporting frame and redactor support, respectively, a socket piece in fixed re ation with the lamp adjusting and a bracket supporting block retlector adjusting cross rod, connections for impartin movement to said cross rods,

means for in ependently adjusting the lamp and redector in la third plane, comprising alamp carrying bracket and reiiector supcross rod xed tothe :seA

tudina adjustment porting bracket, guide rods associated there- .v with. and mounted for lon tudinalnieve-v ment relative to said socket piece and bracket supporting' block, respectively; and conuec tions for eiecting'y adjustment of saiduods whereby. an independent universal adjustment of said lamp and ieiector is obtalned.

Signed at New York, in the county of New lYork, and State of New York, this First day of June 1920. A

onder. s, =r| .fi-ir enana.