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1953-54 Theatre Catalog, 11th Edition, Page 237 (201)

1953-54 Theatre Catalog, 11th Edition
1953-54 Theatre Catalog
1953-54 Theatre Catalog, 11th Edition, Page 237
Page 237

1953-54 Theatre Catalog, 11th Edition, Page 237

screen is not available, then a large white screen might be installed for the time being to take advantage of the better presentation of motion pictures on the larger screen.

Screen Curvature

For wide, shallow houses the radius of curvature should be approximately equal to the projection throw. For average and narrow houses, the radius of curvature should be about threeefourths of the projection throw.

Screen Tilt

For houses with high balconies, it may be desirable to tilt the screen back a few degrees. A rough rule to follow is to tilt back by:

Projection angle in degrees

2 minus 3 2 degrees of tilt.

For example, if the house has a projection angle of 18 degrees the tilt back would be:

18 degrees

2 minus 3 Z 6 degrees of tilt.

New lenticular screen materials are

being developed that have the tilt of the

refiected light built in as a property of

the screen material itself, making unnecessary the tilting of the screen.

Curved Side Wings With Top And Bottom Surround Surfaces

Wherever the structure of the house will permit, it is recommended that a curved screen surround be added to further enhance the curved front end appearance of the theatre. This surround may {it in just back of the proscenium or blend into the side walls of the theatre. Depending upon the requirements of the individual house, the surround elements may be mounted separately from the screen to permit movement. The screen frame as well can be mounted on a dolly if necessary.

Front. Side. and Back

Seating Problems

The installation of the larger screen may cause some of the front seats to become less desirable, while architectural interferences may limit somewhat the usability of some of the back and side seats. The advantages of the better presentation by the larger screen should offset the possible loss of some of these seats.

Aperture Plates

For houses with very fiat projection angles, the size of the aperture plate will be approximately 0.825 inches by 0.496 inches to give the desired 1:66 : 1:00 screen aspect ratio. As the projection angle increases, the aperture plate must be shaped with slanted sides and the height of the aperture plate gradually reduced to retain the same .l:ti(i:1:00 screen aspect ratio. In no case, however, should this height be less than 0.470 inches. If the screen is curved, the top and bottom of the aperture also will be slightly curved. If the screen is in a surround, it is desirable to have the aperture plate slightly out of focus so as to give a soft blending of the picture into the edges of the surround.


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Proiection Machines

As the screen size is increased more light is needed. This may be obtained by a combination of one or more of the following:

(1) Good metallic screen materials, since more light is reflected from these than from white materials.

(2) Faster lenses, if needed.

(3) More efficient shutter blades.

(4) Elimination of glass in projection ports, if possible; otherwise, have the projection glasses made of thin water-white clear optical glass, with both surfaces coated to reduce surface reHection losses.

(5) More efficient heat filters, if needed, or the possible use of double air jet cooling of the film in the gate to eliminate the light loss of the heat filter.

(6) Larger lamp houses with more efiicient mirrors or condenser lenses and probably larger carbons running at higher amperage.

(7) Excellent maintenance and operation of all parts of the projection equipment.



SIGHT lines in relation to height of panoramic

screen demonstrates the problem created by a

balcony overhang in limiting View from the rear orchestra seals.


As a result of the desire on the part of Universal-International to help the average exhibitor improve his presentation of motion pictures, their studio technicians developed a new wide screen equipped for stereophonic sound.


One of the great dangers of a revolutionary technical advance in the film industry is the possibility of making obsolete all previously made pictures. This, of course, would work a great hardship on exhibitors depriving them of films necessary to keep their theatre in operation during the transition period.

For this reason, UsI technicians approached the problem with the aim of


shown in the initial stage of its installation at Loew's State in New York City.
1953-54 Theatre Catalog, 11th Edition, Page 237