US823913A - Protective gate for moving pictures. - Google Patents

Description

m PATENTED JUNE 19, 1906.

L. BORIES. PROTECTIVE GATE FOR MOVING PICTURES.

APPLICATION PILED NOV. 15, 1905.

UNITED STATES PATENT orrron PROTECTIVE GATE FOR MOVING PICTURES..-

Specification of Letters Patent.

Patented June 19, 1906.

Application filed November 15, 1905. Serial No. 287.436.

To all whomit'may concern:

Be it known that I, LEON BORIES, a citizen of the United States, residing in the city and county of San Francisco and State of Cali- 5 fornia, have invented new and useful Improvements in Protective Gates for Moving Pictures, of which the following is a specification. My'invention relates to a means for protecting the films of moving pictures from the concentrated light which i's used for illuminating such pictures and which will ignite the films if by any means the apparatus should be mementarily stopped.

y invention consists of an automaticallyclosable gate or door and means operating it, so that the gate remains open while the apparatus is in motion and is closed whenever the movement stops.

It also comprises details of construction which will be more fully explained by reference to the accompanying drawings, in which Figure 1 is a front elevation of my device with gate closed. Fig. 2 is a plan view show ing the gate open.

In the exhibition of what are known as "moving pictures the iilms are moved across the shutter-inclosed space and are subjected to an intense concentrated light, by which they are projected upon a screen. As long as the films are in motion they pass rapidly enough to preserve them from undue heat from the concentrated light; but if the apparatus stops there is danger that the films will beignited and destroyed.

g It is the object of my invention to provide a means for protecting the films from such accident.

A is the frame, having an opening through it, across which opening the films ca ing the pictures are moved by suitable mec an ism, (not here'shown) and the light which is used for illuminating the pictures is concentrated upon the film within this opening.

In my invention I provide a gate 2, which is hinged to the frame A. In the present case I have shown the gate as being hinged so as to open outwardly and. expose the film to the illuminating-light. Vhen closedacross the opening, the light strikes the back of the gate and the film is protected.

3 is a crank-arm connected with one of the gate-pintles, and 4 is a connecting-rod, one

5 5 end of which connects with the crank and the other with the slidable sleeve 5,'which is movable upon the stem 6.

8 represents the weights of a governor,which in the present case is shown as having bellcrank arms fulcrumed at the angles on a revoluble part carried by the stem or spindle 6,

and the inner ends of the arm engage with the slidable sleeve 5, and when the weights of the governor are thrown outwardly by centrifugal action the sleeve will be moved upon the stem, and through the connecting-rod and crank centrifugal motion ceases or falls to a certain degree, the sleeve will be forced backwardly upon the stem byv means of a spring 9, and thus acting through the arms of the governor brings the weights again to the center. This movement ofthe sleeve also acts, through the connecting-rod and crank, to close the door 2.

Motion maybe transmitted to the governor stem or spindle by any suitable I1'1GL11S either by belt, sprocket-chain, gearing, or other well-known equivalent. In the present case I have shown a friction-roller at 10, carried upon the end of the governor-spindle and contacting with the periphery of the flywheel 11 of the machine, so that while the the door will be opened. When the.

machine is in operation the rotation of the fly-wheel will be transmitted to operate the governor and hold the gate open. As soon as the apparatus stops the gate will be closed,

as previously described, and the film protected from undue heat while it remains stationary.

In order to compensate for irregularities in the movement of the mechanism by which the governor-spindle is revolved, one end of the spindle is journaled or stepped so that the spindle may have a little side play at the opposite end which carries the frictional roller. This opposite end of the spindle is turnable in a box or journal 13, which is slidable upon a guide or support 14, and is normally drawn inwardly by a spring, as at 15. If there are any irregularities in the periphery of the driving-wheels, these will be compensated by the movement of the spindle held in position and relieved by the spring 15, so that the driving-roller will always be held in contact with the pulley through which it receives motion.

Having thus described my invention, what I claim, and desire to secure by Letters Patent,is-

1. The combination with a kinetoscope having afly-wheel, of a gate, hinged at one edge and turnable outwardly about hinges, and means by which; the gate is opened while the filrns are motion, and

closed when the motion ceases, said means including a governor and stem, a sleeve slidable on its stem, a'crank on the gate-axis, and

a connecting-rod between the sleeve and crank, and a friction-roller carried on the governor-stem, and contacting with the'fiywheel.

2. The combinationwith a kinetoscope, of

a hinged gate, means for turning the gate outwardly about its hinges, said means in-- eluding a ball-governor and j ournaled stem turnable in unison with the movement of the film-carrying mechanism, an independent sp'ring-returned sleeve slidable on the stein, a crank on the gate-axis, and 'a connecting; rod. betweensaid sleeve and the gate-crank.

3. The combination with a kinetoscope, of

a hinged gate turnable outwardly about its hinges, a ball-governor and stem revoluble in unison with the movement of the film-carry ing apparatus, a slidable sleeve, bell-crank governor arms, the inner ends of which con} tact with the sleeve, a returning-spring on said stein having one end bearing EWiLlIlSt the sleeve, connections between said sleeve and the gate, and a crank rigid with the hingepintle whereby the gate is opened while the films are in motion and closed when they cease to move.

4.- The combination with akinetoscopc, (if

a hinged atehaving a crank-arm, a governor, a ournaled stem and bell-crank arms by 'motion is transmitted to revolve ernor-stem.

which the overnor is carried, a sleeve slid able upon t e spindle, with which sleeve the inner ends of the arms cont-act, 'a spring adapted to be compressed by the sleeve when the governor is extended by centrifugal action, said spring returning the sleeve and the governor when the motion ceases, and a rod connecting the sleeve with the crank-arm of the gate, and a friction-roller through which the gov- 5-. The combination with a kinetoscope having an opening across which the films pass and through which they-are illuminated, of a gate closable over said opening when the motion. of the apparatus ceases,-a governor, a

spindle by which the governor is carried,

connections between the governor and the gate'whereby the latter is opened and closed,

' a frictional roller carried upon the end of the nessesr nEoN "B'o'RiEs. Witnesses:

' HENRY P. TRICOU,-

S. H. Nounsn.

. 5 my hand in presence of two subscribing wit-

Images