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Projection Engineering, June, 1930
Page 3
PORTABLE
AND
PERMANENT
Fire-Proof Projection Rooms
Both portable and permanent type
STANDARD
SIZES
4 ft.
x 6 ft. x 7 ft.
1% in.
high
6 ft.
x 8 ft. x 7 ft.
lVz in.
high
8 ft.
x 9 ft. x 7 ft.
iy2 in.
high
9 ft.
X 12 ft. x 7 ft.
iy2 in.
high
9 ft.
x 14 ft. x 7 ft.
iy2 in.
high
These booths are made of J/4" thick transite with angle iron I Y^" x 1 '/]■" x 3/16". The panels are interchangeable and bolted together with stove bolts. The seams are filled with transite cement. The floor sheets are %" thick asbestos. The Underwriters throughout the country have approved these booths, as well as the fire and building departments of all cities.
Contner-Blue Seal Universal Lens Adaptor and Aperture System
We introduced the first quick-change movietone aperture and lens Adaptor System.
We have several thousand successful installations in United States, Canada and foreign countries.
We are now supplying the film trap made of heat resisting iron alloy — made in two styles, one with the sliding aperture and the other with removable aperture plates.
On account of quantity production we are announcing the following new prices:
Special Alloy Film Trap with sliding apertures $30.00
Adaptor Holder, one regular and one movietone adaptor. .$25.00
Combination set including Trap and Adaptors complete for one projector .$52.00
FIG. 2 Fig. 2 shows special film trap made from alloy of iron which will not warp. This is equipped with apertures for standard and sound track film. Apertures are placed in operating position by sliding up or down and they automatically lock in either position.
Blue Seal Products Co., Inc.
260 Wyckoff St.,
Distributor for Johns-Mansville Asbestos Products, of Motion Picture Accessories since
Also Manufacturer
1913 WRITE FOR CATALOG OF BLUE SEAL PRODUCTS.
BROOKLYN, N. Y.