US1341527A - Equipment for moving-picture machines - Google Patents

Description

R. N. VYNE.

EQUIPMENT FOR MOVING PICTURE MACHINES.

APPLICATION FILED MAY 13, 1919.

1,341,527. Patented y 2551920.

A TTOR/VEYS UNITED STATES PATENT OFFICEL RAY NICHOLAS VYNE, OF PRESCOTT, ARIZONA, ASSIGNOR OF ONE-THIRD T0 RAY N.- VYNE, ONE-THIRD TO GARRETT O. VYNE, AND ONE-THIRD T0 HARRY J. SMITH,

ALL OF PRESCOTT, ARIZONA.

EQUIPMENT FOR MOVING-PICTURE MACHINES.

Specification of Letters Patent.

Patented May 25,1920.

Application filed May 13, 1919. Serial No. 296,920.

To all whom it may concern:

Be it known that I, RAY N. VYNE, a citizen of the United States, and a resident of Prescott, in the county of Yavapai and State of Arizona, have invented new and useful Improvements in Equipments for Moving-Picture Machines, of which the following is a full, clear, and exact description.

The invention relates to a fireproof booth or operators compartment installed in a moving picture house and adapted to contain, at least, two moving picture projecting machines for successively projecting images onto a distant screen.

The object of the invention is to provide certain new and useful improvements in equipments for moving picture machines whereby a shutter is interposed between the distant screen and the source of light of the corresponding moving picture projecting machine used at the time with a View to prevent the undesirable red afterglow appearing on thedistant screen on stopping the projecting machine in use at the time. Another obj ect is to keep one shutter of the nonactive machine closed while the other shutter for. the machine in use is open.

With these and other objects in view, the invention consists of certain novel features of construction, as hereinafter shown and described and then specifically pointed out in the claims.

A practical embodiment of the invention is represented in the accompanying drawings forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the views.

Figure 1 is an inner face view of the front wall of a booth or operators room having two shutters controlled by a solenoid in series with one are lamp forming the source of light for the one projecting machine;

Fig. 2 is an enlarged front elevation of the shutter controlling solenoid with part shown in section;

Fig. 3 is a transverse section of the same on the line 33 of Fig. 2; and

Fig. 4 is a. sectional plan view of a portion of the booth or operators room on the line 44. of Fig. 1.

When two projecting machines are used in a fireproof booth or operators room and the source of current for the arc lamps forming the sources of light for the projecting machines is a mercury arc rectifier, a shunt machine, a motor generator, a transformer or a rheostat it is common practice to use what is known in the motion picture business as stealing the light from one arc lamp to another or, in other words, as both lamps are cut in parallel of the same line and with one lamp burning and the carbons touched on the other lamp, then the current travels in the path of least resistance on the carbons touching on the second lamp thus automatically causing the are on the first lamp to be extinguished. This change, of course, takes place at the end of each reel or film with a view to permit of projecting a continuous picture upon the screen by the successive use of the two projecting machines. l/Vhen the arc lamp on the machine in use at the time is extinguished then its carbons glow after the current has ceased to flow thus producing rays of light which pass from the glowing carbons onto the distant screen, and this glow produces a very undesirable red discoloration of the screen. In order to prevent this afterglow of the carbons to be projected onto the distant screen use is made of a shutter mechanism interposed between the distant screen and the arc lamp of the corresponding machine. As shown in the drawings, use is made of the usual shutters 10 and 11' mounted to slide vertically in suitable bearings 12 and 13 attached to the inner face of the front wall 14 of the booth or operators room 15, said front wall 14 having openings 16 and 17 for the passage of the images projected onto the distant screen by the usual projecting machines mounted in the booth opposite the openings 16 and 17. The shutters 10 and 11 are hung on cords l8vand 19, preferably made of cotton, and attached at their upper ends to the booth so that in case a fire breaks out in the booth the suspending cords 18 and 19 are burned to allow the shutters 10 and 11 to drop and close the openings 16 and 17. The construction described is common in equipment of moving picture booths as now generally provided. The two suspending cords 18 and 19 for the shutters 10 and 12 pass loosely through eyes 20 and 21 formed in the ends of a lever 22 fulcrumed at 23 on the inner face of the front wall of the booth or operators room. One side of the lever 22 is pivotally connected with a link 24 attached to the core 25 of a solenoid 26 mounted on a suitable framework 27 attached to a suitable support within the booth or operators room. The wires 28 and 29 of the solenoid 26 are arranged in series with an arc lamp 32 for the moving picture machine, disposed opposite the openings 16.

When the arc lamp 32 is burning, the solenoid 26 is energized and its core 25 is now in uppermost position whereby the link 24 holds .thelever 22 in the position shown in Fig. 1, thereby holding the shutter 10 in open position while the shutter 11 is closed. The images projected by the projecting machine opposite the opening 16 pass through this opening onto a distantscreen and when the reel has run out the operator starts the other machine by touching the carbons of the arc lamp 33 to cause the current to pass through these carbons thereby automatically cutting out the current from the carbons of the arc lamp 32 owing to the current passing by way of the least resistance. When the current for the carbons 32 is cut out the electro-magnet 26 is deenergized and consequently the core 25 drops by its own weight and in doing so the link 24 imparts a swinging motionto the lever 22 whereby the shutter 10 moves into closed position relative to the opening 16 while the shutter 11 is raised to uncover the opening 17 for the passage of the images from the second machine to the distant screen. It will be noticed that by the arrangement described the rays of light emanating from the glowing carbonsof the extinguished arc lamp 32 cannot pass through the opening 16 onto the distant screen owing to the closing of the shutter 10.

When the second reel of the second machine has been finished the operator re-starts the first machine by touching the carbons on the arc lamp 32 whereby the current is cut off from the arc lamp 33 and passes through the carbons of the are lamp 32 thus also supplying the solenoid 26 with electrical energy to move the core 25 upward thereby reversing the position of the lever 22. It is understood that when this takes place the shutter 10 is raised while the shutter 11 is I light, from reaching the screen, and actuating means for moving said means into interposed position, said actuating means congrolllled by the extinguishing of the source of 2. In an equipment for projecting moving pictures by the successive use of at least two moving picture machines, shutters interposed between the distant screen and the sources of light of the projecting machines,

one of the shutters for the machine in use at the time being open, and actuating means controlled by. the source of light in use at the time to automatically close the said open shutter on extinguishing this source of light. 4.-. In an equipment for projecting moving pictures onto a distant screen, a booth having two openings at least through which images are adapted to be projected onto the distant screen by a moving picture projecting machine at each opening, a source of light for each projecting machine, two shutters controlling the said openings, one of the shutters being open and the other being closed at the time of using the machine opposite to the open shutter, and electrical means controlled by the said sources of light and connected with the said shutters to close the open shutter and to move the closed shutter into open position on extinguishing the light of the machine in use at the time.

5. In an equipment for projecting moving pictures onto a distant screen, a booth provided with two openings at least, through which images are adapted to be projected onto the distant screen by a moving picture projecting machine at each opening, arc lamps as the sources of light for each of said projecting machines, shutters controlling the said openings, a lever connected with the said shutters to alternately open and close the shutters, a solenoid connected with the said lever, and an electric connection connecting the said solenoid with the arc lamps of the said projecting machines.

RAY NICHOLAS VYNE.

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