US1450864A - Projecting screen - Google Patents

Description

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A TTURHE YS WITNESSES Patented Apr. 3, 1923.

.Tome w. rmx, In., or NEW Yonx, N. Y.

l rxoLmc'rmG SCREEN.

Application med December 3, 1921. serial No. 519,618.

Taallwlimnitmyconcern: Y

.Be it known that 1 JonN W. Pncx, Jr., a citizen of the United States, and a resident of the city of New York, borough of Manhattan, in the county of New York and State of New York, have invented a new and- Improved ProJectm Screen, of which the following is a full, clear, and exact description.

This invention relates to improvements in projecting screens, particularly to a screen for displaying motion ictures or the like. The principal object o ythe invention is to provide a screen which will have unusually line reflecting powers and at the same time, a screen which will serve as a cooling agent to cool motion picture houses in which the screen is used.

A further object is to provide a screen of this character which can be very cheaply produced. To be more specific, the principal object of the invention is to provide a screen which includes a reflecting surface of frost or snow, said-fsurface to be formed by any suitable refrigerating apparatus.

Another object is to provide a snow screen of this character, in whichv means is provided for catching the drip from the screen, for keeping the refrigerating surface free from dust and extraneous matter, and for insuring a smooth surface at all times.

With these and other objects in view, the invention consists in certain novel features of construction and combinations and arrangements of parts as will be more fully hereinafter described and pointed out in the claims.

In the accompanying drawin Figure 1 is a view in front e evation of my improved screen, parts being broken away for clearness;

Figure 2 is a view in section therethrough on the line 2 2 of Fi rel; and

Figure 3 is a top p an view thereof.

Referring in detail to the drawings, the reference numeral 1 is used to designate a support, to which a rectangular tank 2 is secured in any ap roved manner. The tank Q is relatively tiin and the forward face of the tank is substantially the same size as the screens ordinarily used in the projcction of motion pictures. The rear walls and the sides and top and bottom of the tunk are insulated h v the use of insulating material` such as 3. The tank itself is prefern|l-\4 formed of sheet metal and the insulatf any suitable source o ing material may be asbestos or any other sulbdstance which does not transmit heat or co The tank 2 is filled with brine and a system of ammonia pipes 4 or any suitable refrigerating apparat-us within the tank serves to maintain a low temperature therein. 5 represents the supply pipe of an ammonia system and 6 the return pipe thereof, the series of pipes 4 being located inside of the tank and the pipes 5 and 6 leading to supply. It will be apparent that when the refrigerating apparatus is utilized to produce a very cold tcmperature within the tank, that the cold ex posed front surface of the tank will collect a coating of white frost or snow such as 7. It is of course highly desirable that this surface 6 of the tank should be as smooth as possible so that a smooth coating of frost will be formed on the outside thereof.

The light reflecting powers of frost or snow are well known and it is therefore thought unnecessary to dwell upon the particularly eicient nature ofA the screen for reflecting purposes. It is worthy of note` however, that a screen formed of frost will add materially in cooling a theatre and will also prove a great advertising feature in the summer time to attract patrons to a house using the same.

It is unnecessary to maintain the refrigerating system in operation except when the screen is in use and after the refrigerating system has ceased to operate the frost on the screen will naturali melt. A drip pan such as 8 is provided un er the screen for catching this drip and any suitable outlet 9 is utilized for draining the water out of the drip pan.

10 represents a scraper bar carrying at its ends sleeves 11 which are slidable vertically upon guide bars 12 at opposite sides of the screen. These guide bars may be mounted in suitable brackets 13 secured to the tank and serve to maintain the scraper bar 10 spaced a predetermined distance from the frost surface 6 of the tank. A flexible device in the form of a cable 14 running over a pulley 15 mounted upon the top of the tank serves to lower and raise the scraper. This scraper not only Serves to maintain a smooth frosted surface. but also is useful for keeping dust und otllei` extraneous mutter olf of the screen.

l't is to bc understood that thc aecompanying drawings and the above description are merely illustrative of one Way in which the invention is carried out, but that the invention itself is broad enough to cover any use of frost or snow for display purposes. It will be evident. therefore, that although I have illustrated one of the preferred embodiments of my invention that various slight changes and alterations vmight be made in the general form and arrangement of the parts described without departing from the invention, and hence I do not wish to limit myself to the precise details set forth, but shall consider myself at liberty to make such slight changes and alterations as fairly fall within the spirit and scope of the appended claims.

I claim:

1. As a new article of manufacture` a projecting screen for motion ictures, including an artificially cooled s eet of material adapted to collect frost.

2. As a new article of manufacture, a projectingscreen for motion'pictures, including an artificially` cooled sheet of metal adapted to collect frost.

3.. As a new article of manufacture, a projecting screen for motion pictures including an artificially cooled sheet of material adapted to collect frost, and a panel-like refrigeration tank arranged in a substantially vertical plane and having a plane front wall constituting said sheet of material.

4. As a new article of manufacture, a rojecting screen for motion pictures inclu ing an artificially cooled sheet of material adapted to collect frost, and a panellike refrigeration tank arranged in a substantially vertical plane and having a plane front wall constituting said sheet of material, said tank having associated therewith means for preventing the formation of frost-on the exterior of the tank at points beyond said wall.

5. As a new article of manufacture, a rojecting screen for motion pictures inclu ing an artificially cooled sheet of material adapted to collect frost, and a panel-like refrigeration tank arranged in a substantially vertical plane and having' a plane front wall constituting said sheet of material, said tank also having a back wall, and top, bottoln and side walls of relatively small area compared to said front and back wal-ls, there being provided means for insulating all wall surfaces save said front wall.

6. As a new article of manufacture, a rojecting screen for motion pictures inclu ing an artificially cooled sheet of material adapted to collect frost, a panel-like refrigeration tank arranged in a substantially vertical plane aud having a plane front wall constituting said sheet of material, there being also provided a scraper spaced from said wall and movable in a plane arallel thereto for engaging the frosted sur ace, and, means for operating the scraper.

7. As a new article of manufacture, a projectino screen for motion pictures including an artificially cooled sheet of material adapted to collect frost, and a panel-like refrigeration tank arranged in a substantially vertical plane and having a plane front wall constitutingr said sheet of material, there being also provided means for regulatingr the thickness of such frost collection.

8. As a new article of manufacture, a )rojecting screen for motion pictures inclu ing an artificially cooled sheet of material adapted to collect frost, and a panel-like refrigeration tank arranged in a substantially vertical plane and having a planefront wall constituting said sheet of material, there being also provided a drip pan extending across the entire width of said wall for collecting the drip from said frost.

JOHN W. PECK, J.

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