US1323377A - Stand for projecting apparatus - Google Patents

Description

v N. POWER. STAQD FOR PROJECHNG APPARATUS. APPLICATION FILED FEB- h l9l6- RENEWED APR. 23, I919.

1 ,32 3,377. Patented Dec. 2,1919.

3 SHEETS-SHEET I.

N. POWER.

STAND FOR PROJECTING APPARATUS. APPLICATION FILED FEB- IBIB' RENEWED APR- 23' I919.

"1,323,377. Patented Dec. 2,1919.

'3 SHEETS-SHEET 2.

' N. POWER. STAND FOR PROJECTING APPARATUS. APPLICATION man ma. 1. l9l6- 'nsuswsu APR- 2s-, 1919..

Patented Dec. 2,1919.

3 SHEETS-SHEET 3.

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UNITED STATES PATENT OFFICE.

NICHOLAS POWER, OF BROOKLYN, NEW YORK, ASSIGNOR T0 NICHOLAS POWER COMPANY, OF NEW YORK, N. Y., A CORPORATION OF DELAWARE.

STAND FOR PROJECTING APPARATUS.

Specification of Letters Patent.

Patented Dec. 2, 1919.

Application filed. February 1, 1916, Serial No. 75,486. Renewed April 23, 1919. Serial No. 292,241.

To all whom it may concern:

Be it known that I, NICHOLAS POWER, a citizen of the United States, and a resident of the borough of Brooklyn, county of Kings, city and State of New York, have invented new and useful Improvements in Stands for Projecting Apparatus, of which the following is a specification.

This invention relates to stands for moving picture machines and more particularly to the lamp support of said stands.

. The object of the invention is to provide a lamp support which may be quickly and exactly adjusted to bring the lamp from registration with the optical aXis of the moving picture machine, into registration with the optical aXis of the stereopticon attachment with which the moving picture machine is equipped for the projection of slides or still pictures.

Moving picture machines as installed in theaters and places of entertainment are universally provided with a stereopti'con attachment consisting of a suitable lens system supported at one side of the moving picture machine and in the same horizontal plane whereby the single lamp may be used for both the moving pictures and the still pictures, the lamp being mounted on a suitable carriage to permit it to be shifted laterally from one instrument to the other.

In moving picture machines now on the market the lamp support consists of a pair of horizontal rods on which the carriage is supported by means of rollers so as to be pushed back and forth on the rods as desired. The present construction is open to the objection that the track rods must be long enough to support the outer edge of the lamp-house inwhich the projecting lamp is inclosed in either of its extreme positions of adjustment, so that this portion of the machine occupies a space nearly twice the width of the rest of the machine. As projecting apparatus must frequentlybe installed in cramped quarters, such as small fireproof booths, it is of material advantage to keepthe dimensions of the machine within the smallest limits possible.

In standard moving picture, apparatus the rods which support the lamp-house carriage are themselves adjustable toward and from the projecting lenses along fixed tracks carried by the stand which supports the head, and it may happen that the distance to which the lamp is adjusted to the rear of system to the other into accurate position both longitudinally and laterally of the machine.

My improved lamp-support is also provided with means whereby the position of the lamp-house supportmay be adjusted with. micrometer accuracy by means of an adjusting stop screw which efiects the movement of the lamp.

My improved lamp support is also designed to be adjusted with the minimum of effort and to be readily set up and taken down when the machine is to be installed or to be packed for transportation.

In the accompanying drawings I have illustrated my improved stand in connection with a moving picture outfit of stand ard construction, and in the said drawings Figure 1 is a side elevation of such apparatus; 1

Fig. 2 is a plan view on an enlarged scale of the lamp-house support with the lamp house detached;

Fig. 3 is a sectional View showing the manner of attaching the lamp-house to the support; and

Figs. 4L and 5 are side and end views respectively of Fig. 2.

Referring to the drawings, particularly to Fig. 1, 1 indicates the stand of moving picture apparatus on the front end of which the motion picture projecting mechanism 2 is mounted. The mechanism 2 is provided with a laterally projecting bracket 3 from which is suspended the holder for the lenses 3 for projecting the still pictures. The rear portion of the frame 1 consists of properly supported longitudinal track rods a on which the main lamp carriage 5 is adjustably supported in the usual manner.

This carriage consists of a rigid substantially rectangular frame having at one edge the projecting ears provided with the eyes 6 which slide on the outer track rod 4. The frame 5 is wider than the distance separating the track rods, and the eyes 7 sliding on the other track rod are formed in the front and rear sides of the frame intermediate their ends, the projectin portion of the frame extending substantiafiy to the optical axis of the lens system for the still pictures. i

The frame 5 is provided with four vertical bearings 8, two being provided between the track rods 4 and the other two in the projecting ends of the front and rear sides of the frame behind the stereopticon lenses. In each of the bearings 8 there is supported a pin 9 to the upper end of which there is attached a crank arm 10. The crank arms or links are all of equal length and the outer end of each is threaded to receive a pin 11 by which the support 12 for the lamp-house is attached to the links 10, the pins being shouldered to prevent clamping the support 12 when they are screwed tight in their places. The support 12 of the lamp-house is provided with symmetrically arranged bearings for the pins 11 so that when the lamp-house is shiftable relatively to the main frame 5 the action is that of the well known parallel link motion, and the longitudinal axis of the lamp-house is maintained in parallelism with the longitudinal axes of the machine.

The lamp-house 13 consists of the usual sheet metal box which is mounted on the support 12 to inclose the are 14 whose carriage is directly carried by the support 12 in suitable ears l5 projecting through the sheet metal bottom of the lamp-house. The carriage of the arc is adjustable with regard to the lamp-house by means of a hand screw 16 and the various parts of the arc lamp are provided with the usual adjustin screws, not shown, but which project through the rear wall of the lamp-house into position for easy manipulation by the operator.

For adjusting the lamp-house relatively to the main carriage 5 the support 12 is provided with a laterally projecting handle 17 and to limit the range of adjustment there are provided two set screws 18 threaded in suitable bearings in the rear oar of the main frame 5, the screws being set at an angle of substantially 45 to the plane of the bar whereby one set screw will engage one of the rear links 10 in one extreme position of,

adjustment of the lamp-house and the other set screw will engage the other rear link 10 to limit the adjustment in the opposite direction. The screws 18 are preferably pro vided with threads of fine pitch whereby an accurate adjustment may be obtained.

In Fig. 2 the support 12 is shown in full lines in its position of adjustment behind the lens of the moving picture machine indicated at 19 and in dotted lines in its position behind the stereopticon lens 3".

In setting up a moving picture apparatus the position of the apparatus is usually above the center of the screen on which the pictures are projected, so that the stand is inclined with the projecting mechanism below the lamp-house. By arranging the lamp-house support so that the links 10 project rearwardly the lamp-house will rest in either position of adjustment against the stops 18 whereby it is not necessary to lock the lamp-house in its adjusted position to prevent accidental displacement.

The position of the arc with relation to the condensing lens in the front wall of the lamp may be accurately adjusted by means of the screw 16 and the position of the lamphouse with regard to the lenses 19 and 20 may be independently adjustable with equal accuracy in either position by the set screws 18 so that a sharp exactly focused picture may be quickly obtained. When the apparatus'is not in use the lamp-house may be adjusted to a position with the links 10 sub stantially parallel with the rods 4 in which it lies entirely within the lateral space of the frame 5 thereby materially reducing the space occupied by the apparatus.

A further object of my improved lamp house support is that it provides a range of longitudinal adjustment that is toward and from the moving picture mechanism, greater than the length of the rods 4, where- .by the fixed dimensions of the machine may be shortened longitudinally as well as laterally. This additional longitudinal adjustment is secured by reversing the direction of the connecting links 10 between the carriage 5 and the base 12. Instead of connectlng the parts together with the links projecting rearwardl from the carriage 5 to the base 12, the lmks may project forwardly so that the base 12 is in advance of the carriage 5 or nearer the projecting machine. This change in adjustment will be utilized. when the machine is to be used for a very short throw with a wide an 1e lens, as when it is placed on the side of t 0 screen on which the pictures are projected, opposite to the audience.

I claim:

1. In a stand for moving picture apparatus embodying separate lenses for still and moving pictures, the combination of a relatively fixed base portion, and a lamp support comprising a rectangular frame carried by said base and provided with four vertical moving picture projecting mechanism and the still picture lens, a lamp support comprising a frame mounted for adjustment on said base toward and from said mechanism and lens, a set of links of equal length pivotally supported on said frame for movement in a'horizontal plane, and a lamp supporting frame pivotally supported on said links whereby the lamp may be adjusted into registration with either lens.

3. In a stand for moving picture apparatus embodying separate lenses for still and movingpictures, the combination of a relatively fixed part adapted to support the moving picture projecting mechanism and the still picture lens, a lamp support comprising a frame mounted for adjustment on said base toward and from said mechanism and lens, a set of links of equal length pivotally supported on said frame for movement in a horizontal plane, a lamp supporting frame pivotally supported on said links whereby the lamp may be adjusted into registration with either lens, and means for limiting the extent of pivotal movement of said supporting frame and for effecting micrometer adjustment of said supporting frame in positions at each end of its range of movement.

4. In a stand for projecting apparatus having two lens systems, a single projecting lamp for both systems, a sub-frame for said'lamp adapted to be fixed w1th relation to both systems, a lamp carrying frame, parallel links of equal length connecting said frames, said lamp being positioned on said carriage so as to be intermediate the optical axes of said systems when said links are parallel with said axes whereby said lamps will be in the said plane transverse to said axes when adjusted to position in either system, and combined stop and adjusting screws arranged to limit the range of movement of said lamp-carrying frame and to effect micrometer adjustments thereof in either of its operative positions.

5. In a stand for projecting apparatus having two lens systems, a single projecting lamp for both systems, a sub-frame for said lamp adapted to be fixed with relation to both systems, a lamp-carrying frame, and parallel links of equal length connecting said frames, said lamp-carrying frame proj cting beyond said sub-frame in either operative position whereby the transverse dimension of said lampand frame may be reduced when the apparatus is not in use by adj usting said lamp-carrying frame to an intermediate position.

6. In a projecting apparatus having two lens systems and a single lamp for both systems, the combination of a stand with the said lenses of said systems at one end thereof, a support near the other end thereof, parallel links supporting said lamp support whereby it may be adjusted transversely of said stand to position said lamp in the optical axis of either system, and stops for limiting the movement of said lamp support to such positions, said lamp support and links being so arranged that the support will rest of its own weight against said stops when said stand is inclined with the end supporting said lamp raised.

Signed at New York city in the county of New York and State of New York this 7th day of January, 1916.

NICHOLAS POWER.

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