International projectionist (Jan 1961-Dec 1962)

Mirrors Continued from Page 9 Front-surface interference-type reflectors, such as the Strong TufCold, must never be cleaned with scouring powder or steel wool, as these abrasives might injure the moicroscopically thin optical coating. Fortunately, this modern type of mirror is relatively free from scumming and pitting. Dust should be wiped from "cold" mirrors with a soft cloth, and stains and fingerprints removed by means of a soft cloth moistened with lens-cleaning fluid. Always keep a spare Strong replacement reflector on hand to avoid shutting down the show or attempting to run on only one projector in the event of accidental mirror breakage. As a matter of fact, the purchase of two spare mirrors is the best policy, inasmuch as periodic replacement on the /\--~~ ( \ "***!*-,«. __ -4 \ / _,---' ,~~~f \i--"~ "**^ Image of crater on aperture plate 1 HP^^H! White light of Yellowish BP 1 1 -~^B gas-ball "shell " light FIG. 7 — The "spot" is a magnified image of the intensely brilliant positive crater formed on or near the film aperture of the projector by the optical action of the arc-lamp reflector. The actual image of the crater is moved beyond the aperture toward the projection lens in 70-mm projection to insure adequate coverage of the large aperture with light. Diatn.[| -"Working" distance FIG. 8 — Large reflectors usually have a "faster" optical speed then small reflectors, and hence provide more light to the picture. The distance of the positive crater to the mirror determines the light-collecting angle and the magnification of the crater image on or near the film aperture. reflectors is the best way to maintain top-quality projection at all times — a wise investment in better theatre business. When replacing reflectors in the lamphouses, avoid tightening the mirror-holder clamps excessively. Tighten the clamps to a degree, but give the mirrors freedom to expand and eontract with the variations in temperature, thus preventing breakage caused by sudden heating or by drafts of air which may rapidly chill the glass when the lamphouse door is opened. iP WILLIAM HASSETT DIES William Hassett passed away in San Diego, California on January 10. Services and interment were held in San Diego. Mr. Hassett was a member of the Chicago Moving Picture Machine Operator's Union, Local 110. INTERNATIONAL PROJECTIONIST Post Office Box 6174 Minneapolis 24, Minnesota Enter my subscription for ( ) 1 year (12) issues— $3.00 ( ) 2 years (24) issues— $5.00 FOREIGN: Add $1.00 per year Name Address City Zone State Whitebone Re-elected to New Brunswick Post James A. Whitebone, secretary anc business agent of IATSE Local 440, St. John, N.B., has been re-elected president of the New Brunswick Federation of Labor after being out of that office for a year. He succeeds Angus MacLeod, who defeated him in 1959 but NTS MOVES National Theatre Supply Company has moved. As of March 1, the new address of their general office is 50 Prospect Ave., Tarrytown, New York. was not a candidate for a second term. Whitebone is now serving his 28th term. Whitebone is also the first Labor Mayor of Saint John, after service on the City Council during most of the years since 1936. He moved into this office following the death of Mayor D. L. Maclaren. He has been an IATSE member since 1919 and a Local officer since 1922. iP Heart flffteM 1 Block from State Street Shopping Air-Conditioned Free TV Convenient Parking (Auto Pickup & Delivery Service Available) 300 Modern Rooms Modest Rates from $6.50 Guaranteed reservations with your FREE Hamilton Hotel "Preferred Guest" Credit Card — Write for yours today RESTAURANT and COCKTAIL LOUNGE Hamilton 2 0 SOUTH D E A RBOR»N 18 International Projectionist March 1961