US1139245A - Guard for the booths of picture-projecting machines. - Google Patents

Description

A. WERNER & R. s; DENNISS. GUARD FOR THE BOOTH S 0F PICTURE PROJECT ING MACHINES,

APPLICATION FLED JULY 11. 1914. Lw fifiu Patented May 11, 1915.

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APPLICATION F LED JULY II, X914. I

' Patented May 11, 1915.

aviueuco'zd' Arthur Werner, Richard S- Deanz'ss holding means, the top cover being removed.

manna snares. Parana orator.

ARTHUR WERNER AND RICHARD S. DENNISS, OF SAN FRANCISCO, CALIFORNIA.

GUARD FOR THE BOOTHS 0F PICTURE-PROJECTING MACHINES.

Specification of Letters Patent.

Patented May ii, 1915 Application filed July 17, 1914. Serial No. 851.674.

T all to]: om it may concern Be it known that we, ARTH R WERNER and RICHARD S. DENNISS, citizens of the United States, residing at-San Francisco, in the county of San Francisco and State of California, have invented new and useful Improvements in Guards for the Booths of Picture-Projecting Machines, of which the following is a specification.

This invention relates to improvements in safety devices or guards for the booths of animated picture projecting machines and has particular application to an automatic safety device for closing the openings in the booth in the event of vfire therein.

In carrying out the present invention, it is our purpose to provide a device of the class described whereby the projecting and sight openings in the boottrwill be automatically closed in the event of the filament passing through the projecting ma- ('hine becoming ignited, thereby confining the smoke and fumes within the operators booth so that thepatrons of the theater or park will be in ignorance of the conflagration.

It is also our purpose to provide a guard or safety device of the type set forth which will be thermostatically controlled and which will respond immediately that the filament is ignited. thereby effectively trapping the smoke and flames within the booth. which will operate eiiiciently for its intend ed purpose and which will embody few parts and these so correlated and arranged as to reduce the possibility of derangement to a minimum. p

' With the above and other objects view. the invention consists in the construction, combination and arrangement of parts hereinafter set forth in and falling within the scope of the claims.

In'the accompanying drawings; Figure 1 is a side elevation of the front wall ofa picture projecting machine operators booth showing our invention installed. Fig. 2 is a sectional view on the line 22 of Fig. 1. Fig. 3 is a similar view on the line 33- ot' Fig. 1 taken at right angles to Fig. Fig. 4 is a perspective view of the controlling element of the guard. Fig. 5 is a view in elevation of one of the shutters and holding means therefor showing the same on an enlarged scale. Fig. 6 is a plan view of the proper position.

Referring now to the drawings in detail, 1 designates the front wall of the booth of a picture projecting machine, such wall being formed with the usual projecting open: ings 2, 2 and sight opening 3. As usual, the interior of the booth is lined with suitable fireproof material and one sidewall of the booth is formed with an entrance opening adapted to be closed by meansof a door lined with fire resisting material. Secured to the inner face of the front wall 1 of the booth contiguous the lower edge of each opening therein is a horizontal strip 4 having theupper elge thereof formed with a longitudinal groove 5 and disposed contiguous the opposite side walls of each Opt-uing and uprising from the particular strip at at the opposite extremities of the latter are guide strips 6 having the confronting edges thereof formed with vertical grooves 7 communicating with the groove 5 in the strip 4 and forming guideways... The guide strips 6 at the opposite sides of. each opening extend above the top wall of the opening a short distance and slidably mounted within the grooves 7 in the confronting edges of each pair of stri s 6 is a shutter 8 adapted, when in lowere position, to close the particular opening in the wall of the booth, the lower edge of the shuttter seating within the groove 4 in the'bottom strip 5 whereby the downward motion of the shutter is arrested and the latter held in Disposed between upper extremities of each pair of guide strips 6 is an outlet box 9 and within each box-9 is a fuse block 10 of insulating material haying the conducting strips thereof interconnected by means of a fusible wire 11 relatively long as compared with the dis tance between the contacts and having the central portion thereof depending below the contacts. Secured to the depending portion of the. fusible wire 11 and suspended thereby is a hook 12 projecting through an insulated slot 13 formed in the bottom portion of the 'side wall of the outlet box. The lower end or bill of the book 12 is designed to engage an insulated ring 13 secured to the adjacent shutter 8 at the upper edge thereof. As long as the hooks 13 are in engagement with the ring. 13 and the fusible wires 11 intact the shutters remain elevated or inactive so that the openings 2, 2 and 3 are unobstructed whereby the pictures may be projected the through the openings and onto the screen and the operator view the screen through the openings 3.

The -fusible wires 11 controlling the shutters are connected in series in an electric circuit 14 connected in multiple with the power circuit of the picture rojecting machine and the wires leading 150m one outlet box to another are inclosed in conduits 15 having the opposite extremities thereof leading into the particular outlet boxes and secured to such boxes. Located in the circuit 14: is a normally open snap switch 16 and connected with the stem of the switch 16 is an operating arm 17 having the outer extremity thereof equipped with a weight 18 and connected with one end of a chain 19 or other flexible element trained over guide sheaves 20, 20 secured to the top wall or ceiling of the booth and having the opposite extremity thereof terminating immediately above the filament feeding mechanism'of the picture projecting machine.

21 designates a frusto-conical shaped counterbalance having the base thereof formed at diametrically opposite points with slots 22 and passed through the slots 22 is a stri of filament 23 or other inflammable material having the extremities thereof passed through an eye on the last-mentioned end of the chain 19 and cemented or otherwise secured to each other to hold the counterbalance 21 to the chain 19 so that the arm- 17 will be held *in inactive position against the action of the weight 18 whereby the switch 16-will remain open.

The conical counterbalance 21 and the"inflammable material connecting the same to the adjacent end of the chain 19 are disposed in proximity to the filament passing through the picture projecting machine and should such filament become ignited the flames therefrom would burn the inflammable material 23 thereby disconnecting the counterdisconnection of the counterbalance from the chain the weight 18 gravitates to lowered position and swings the arm 17, thereby actnating'theswitch 16 to close the circuit 14. When the circuit 14 is closed the current passing through the fusible wires 11 in series in suc circuit melts thewires thereby releasing the books 12 and permitting the shutters 8 to gravitate to lowered position.

Thus, the openings in the walls of the booth are closed and t e v the burning filamentconfined to the picture machine operators booth so that the patrons of the show are not aware of the conflagration.

flames and smoke from menses From the foregoing description taken in connection with the accompanying drawings, the construction, mode of operation and manner of employing our invention will be readily apparent. It will be seen that we have provided a guard for the booths of picture projecting machines whereby communication between the booth and the exterior will be automatically cut off in the event of the filament catching fire.

While we have herein shown and described one preferred form of our invention by way of illustration, we wish it to be understood that we do not limit or confine ourselves to the precise details of construction herein described and delineated, as modification and variation may be made within the scope of the claims without departing from the spirit of the invention.

We claim:

1. The combination with a booth of the class described having openings therein, of

in normal position, a normally open electric circuit including said fusible devices, and means for closing said circuit to blow the fuses.

2. {The combination with a booth of the class described having openings therein, of shutters capable of sliding movement to close the openings and normally in open position, fusible devices holding said shutters in normal position, a normally open electric circuit including said fusible devices, and thermostatically controlled means for closing said circuit to blow the fuses.

. 3. The combination with a booth of the class described having openings therein, of shutters capable of sliding movement to close the openings and normally in open position, fusible devices holding said shutters in normal osition, a normally 0 on electric circuit including said fusible devices, a switch in said circuit, means disposed in proximity to the filament ofthe picture projecting machine within the booth and connected to and switch and adapted to hold the switch normally open and release the switch upon the filament becoming ignited, and means for actuating the switch to closed position upon the release thereof.

In testimony whereof we aflix our signa-

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