International projectionist (Jan 1963-June 1965)

Trailer Hailed Great Assist To Theatres, Dealers Theatre patrons, managers and equipment dealers are responding enthusiast icall) to the new 35mm "talking" trailer produced by Strong Electric Corporation for theatres installing the new Futura projection arclamps. The trailer calls attention to the great improvement in the brilliance of the projected picture, "takes the patron into the projection room", showing the installation, depicts l>\ means of a split screen effect the extent of the increase in brilliance, and then extends an invitation by the management to the patron to see the lamps in actual operation in the projection room. Theatre men say that the trailer creates much good will among the patronage by extending the invitation to see the new lamps and by emphasizing their efforts to keep equipment up to date for the better viewing and greater pleasure in film offerings. Patrons seem to gain appreciation of the theatre's efforts toward that end and more respect for the financial investment involved in upgrading. Equipment dealers say that availability of the trailer shows appreciation of the purchase and indicates the dealer's continuing interest in the theatre after the purchase. Theatre Altec Engineers Checked Our on Century Contrasts in clarity of projection are obvious in the Strong trailer. managers also see their dealer as being interested in helping "sell'' the new equipment to his patrons and so increase boxoffice as to make the purchase even more profitable. The trailer is available at no cost to all theatres installing Futura lamps. Arrangements for a 2-week booking can be made by addressing a request to The Strong Electric Corporation. 76 City Park Avenue. Toledo. Ohio 43601. iP International Projectionist Altec service engineers recently completed training sessions at the Century Projector Corp. factory in Long Island City. The workshop covered all Century's domestic projectors and the firm's all-transistor sound systems. Pictured (left to right) are Altec engineers Hans Newberger, Russell R. Giveans, Harry Randel, F. W. "Bill" Boettcher, Joseph Raho, Doug McLean and Ralph Siegal. Equalizing Sight and Sound Continual from 1'irj.c 7 jectors is to line up the lamps according to the manufacturer's instruction-, and with his recommended alignment tools (available through dealers and service companies I. The centers of the mirror, arc crater, light cone, projector aperture, and projection lens will then all lie on the same straight line — the optical axis. — and the suggested optimum focus and working distances will have been established. 2. The individual arc currents are then checked. Trim both lamps with new, dry carbons, making certain that you have the same positive and negative carbon protrusions bevond the burner jaws in both lamps. "Burn in" both lamps for about a minute, establish the same arc gap. and note the current consumed by each by reading the ammeter. The difference, if any. should not exceed 2 or 3 amperes. If a greater difference in current consumption exists, and it is certain that the ammeters are reading correctly, adjustments should be made in the rectifier transformers or the motor-generator ballast rheostats. 3. Project blank light to the screen April, 1964 i both projectors running, but without film I and change over from one machine to the other several times in rapid succession to detect visible differences in the brightness, distribu 0.006 Z72.5 f 3" LENSe 60%- Average depth of focus £_ Relative light transmission -0.004 FIG. 1 — Lenses of different speeds have different light transmissions and different optical characteristics even though their equivalent focus (E.F.) is the same. The lenses in a 2-projector installation should therefore be identical in speed, type, and make as well as in E.F. tion, or color of the screen illumination. The most exact determinations require the use of a light meter or photographer's exposure meter, but the equalization is close enough if no difference can be detected visually. Arc Focus and Color of Light If a difference can be seen, the working distance of the mirror in Please turn to Page 18