Exhibitor's Trade Review (Mar-May 1922)

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1356 EXHIBITORS TRADE REVIEW Volume 11. Number 19 dowser (F-3) and the automatic fire-shutter. An image of the filament will be projected on the automatic fire-shutter through the pin-hole (F-7). The fact that the image is off center with respect to the aperture does not indicate that the line-up is incorrect. Loosen locking knob (Q-2, Fig. 22) and move the mirror (H) forward or backward by means of focusing knob (Q-1) until the mirror or image of the filament as projected on the fireshutter is exactly the same size as the filament image (Fig. 23). Turning the focusing knob (Q-1) clockwise will make the mirror image smaller; turning it counter-clockwise will make it larger. After the mirror image is of the same size, move the focusing knob (Q-1) to and fro, up and down until the mirror image of the coils meshes into the open spaces between the filament coils, thereby making a uniform source of light. Then clamp the mirror in position iby tightening locking knob (Q-2, Fig. 21). Parts of M/rror Ho/dar Fig. 2J fiow to Mash Mirro r Im aga If this lamp be; now removed, and another lamp (correctly setup in the same lamp-setter) be inserted, the mirror will mesh correctly as before; but if it does not fall exactly between the filament coils, move the mirror slightly one way or the other /ioivCo Adjusi for bte,rcop£/corj Prorv.> ject/on. jsi v. rig 25 . Comp/eCz Lin/t on Poirers Frojeccor. \ until the fault is remedied but do not touch the lamp socket or the adjusting screws (N-1 or S-1). ADJUSTING FOR STEREOPTICON PROJECTION To adjust for stereopticon projection push the carriage (B) over on its track (C-1) against the stop (C-8). Then pull the motion-picture condenser mount (F) over until the stereopticon stop (P-6) hits condenser stop-screw (A-4) on the lamphouse. Bend back the motion-pictui-e condenser mount (F) on its hinge (F-1) against the lamphouse until the stop (F-4) engages in latch (A-7). The setting of the lamp with respect to the plano-convex condensing lenses is done by moving the stereopticon condenser holder (P-1) backward and forward until the field is clear instead of moving the lamp itself to and fro as is the case with the carbon arc. The distance for the lamphouse carriage (B) to be moved over may be controlled by loosening the set screw (B-4) and by varying the distance of the stereopticon positionpin (B-3) to the stop (C-8). (Continued next week) THEATRE SPECIALISTS 8^eK?^tSLvtres C. HOWARD CRANE, Architect ELMER GEORGE KIEHLER, Associate CYRIL E. SCHLEY DETROIT CLEVELAND CHICAGO WINDSOR, ONTARIO "It is another of the BRENKERT MAKE Products" Is the Chorus from Satisfied Users of BRENKERT BRENOPTIGON Model "F." The Most Useful Equipment That Has Been Offered to Theatres in Years. BRENKERT LIGHT PROJECTION CO., Inc., Detroit, Mich. Beautify Your Lobbies with Art Stone Furniture. Durable Fireproof Attractive Comfortable Catalogue "G" on Request Seat No. 4. Size 48" long, 18" wide, 17" high Practical as Well as Ornamental Architectural Decorating Co. Plain and Ornamental Plasterinng Contractors 1600' 1608' 16 10 SOUTH JEFFcRSON ST. Chicago, Illinois. Simplex Sun-light Arc High Intensity Projection Lamp is a perfected product, tested by severe practical usage. It is sufficient to say that it's "A Sun-Light Arc Product" Sun-Light Arc Corporation 1600 Broadway, New York OPEN-AIR EXHIBITORS! Start Your Show an Hour Earlier Than on Any Other Screen Run 2 shows a night in mid-summer by using THE MAGIC CRYSTAL SCREEN No Eyestrain — No Fading — No Distortion from first or last row, middle or side seats, straight or angle throw. Stands any weather. Dust it or wash it — Brilliancy remains. Durability guaianteed. Mr. S. X«Toy, Manager of B. F. Keith's Harlem Opera House, says: "We have had the Magic Crystal Screen for the past 2 years and have found it satisfactory in every way. It not only stands up as to mage, but shows a wonderfully clear picture." 40% — 60% Current saving guaranteed Order your screen now t THE MAGIC CRYSTAL SCREEN CO., Inc. 500 Fifth Avenue, New York City Phone: I/ongacre 8328 and 8329