US2141528A

US2141528A - Knock-down projection room

Info

Publication number: US2141528A
Application number: US143798A
Authority: US
Inventors: Guy W Garrard; Elmer J Peery
Original assignee: Individual
Current assignee: Individual
Priority date: 1937-05-20
Filing date: 1937-05-20
Publication date: 1938-12-27
Anticipated expiration: 1955-12-27

Description

Dec. 27, 1938. G. w-. GARRARD ET AL KNOCK-DOWN PROJECTION ROOM Filed May 20, 1937 ifiarrard lzerJfieeryM/wws ATTORNEYS 1 1 a 1 1 i 1 1 0 MW 2 'O a 1 fl 1% 1 1 1 I I Z M 1 /f I 1 1 1 mm 7 1 1 z 1 2 0 j J I /4. nfiEMUHHHHHHM HHHuHHHHHHHHMWat. z

Patented Dec. 27, 1938 UNITED STATES PATENT OFFICE Guy W. Garrard and Elmer J. Peery, Bakersfield, Calif Application May 20, 1937, Serial No. 143,798

1 Claim.

This invention relates to knock-down projection rooms and has for an object to provide a portable miniature projection room especially adapted for .library, sales rooms, school rooms, or similar locations where it may be used regularly for showing pictures without darkening the rooms.

A further object is to provide a device of this character which will be formed of a few strong simple and durable parts, which will be inexpensive to manufacture and which will not easily get out of order.

With the above and other objects in view the invention consists of certain novel details of construction and combinations of parts hereinafter fully described and claimed, it being understood that Various modifications may be resorted to within the scope of the appended claim without departing from the spirit or sacrificing any of the advantages of the invention.

In the accompanying drawing forming part of this specification,

Figure 1 is a front elevation of a projection room constructed in accordance with the invention.

Figure 2 is a longitudinal sectional view of the projection room taken on the line 22 of Figure 1.

Figure 3 is an enlarged cross sectional view of the projection room taken on the line 33 of Figure 2.

Figure 4 is a perspective View of one of the corner pieces.

Figure 5 is a cross sectional view of the parts disassembled and arranged in a neat package for transportation or storage.

Referring now to the drawing in which like characters of reference designate similar parts in the various views, It designates a corner piece, the same being right-angular in cross section and being formed of rigid material, molded, cast, pressed or otherwise constructed. The legs of the corner piece are provided with longitudinal grooves II in the edges to receive the longitudinal edges of the side and top and bottom panels l2 which may be formed of any light, strong, durable opaque material. There are pref erably four longitudinal corner pieces and four panels and the panels are tapered from the leading end toward the rear end so that when the panels are assembled with the corner pieces the projection room will be substantially of truncated rectangular prism contour, as best shown in Figure l.

Bolts l3 are passed through the panels and through the corner pieces near the ends thereof to detachably secure these parts together so that the device may be readily disassembled and arranged in a neat compact package for transportation or storage.

The front and rear ends of the panels and corner pieces are supported by substantially rectangular frame like channel finishing pieces I4, best shown in Figure 2', which may be likewise formed of rigid material, molded, cast, pressed or otherwise constructed. The two frame like finishing pieces are of different respective sizes so that one may embrace the large rectangular front end of the structure projection room and the other may embrace the smaller diameter rear end of the structure. Also the smaller may be telescopically received into the larger frame like finishing piece, as shown in Figure 5, when the device is knocked down for transportation or storage. The same bolts I3 which secure the panels to the longitudinal corner pieces secure the frame like finishing pieces in place.

A screen iii of sufficient size to snugly fit in the rear end of the projection room is provided, the screen being formed of any desired material, such as for instance heavy composition board having a front reflecting surface formed by painting, for example with aluminum paint, or otherwise. The screen is adhesively secured to a back plate it formed integral with the rear frame like finishing piece M, as best shown in Figures 2 and 5 or may be otherwise secured in place.

In use, the projection room may be set upon a suitable table or other support with the front open end toward the projecting machine. When the image is projected upon the screen the opaque panels provide a dark surface which will eliminate darkening of the room when the device is constructed as above described.

From the above description it is thought that the construction and operation of the invention will be fully understood without further explanation.

What is claimed is:

A knock-down projection room comprising a plurality of corner pieces of right angular cross section having longitudinal grooves in the edges of the legs, side, top and bottom panels having longitudinal edges engaged in said grooves, said panels tapering from a wide front end to a narrower rear end, substantially rectangular front and rear frame like finishing pieces having channels receiving respectively the front and rear edges of the panels and the ends of the longitudinal corner pieces, bolts passed through the ends of the corner pieces and panels and through the front and rear frame like finishing pieces to collapsively secure the parts together, a back plate connected to the rear frame like finishing piece and forming a closure for the rear end of the projection room, and a screen secured to the front face of said back plate.

GUY W. GARRARD. ELMER J. PEERY.