Motion Picture News (May-Jun 1923)

June jo, 1923 3207 Sell more tickets in hot weather. Comfort cool, satisfying comfort— breezy, delightful, refreshing — That's what will fill your house in the hottest kind of summer weather — all summer long. You get it easiest and surest with Typhoons. And it actually costs nothing, because Typhoons pay for themselves the first summer. (Proved in 1500 theatres.) Installed in a couple of weeks. Get started — Write for Typhoon Booklet TYPHOON FAN CO. ERNST GLANTZBERG, President 345 West 39th Street New York Costs Less Now to Have Color Electric Signs Reco Color Hoods hav« b«en greatly lowered in price. Reco Color Hoods snap on or off any bulb; Instantly make it colored. Write for bulletin. CTfflC COMPAW as Mfrt. of Reco Motor*, H&there, »to. 2628 W. Congress St., CHICAGO Insist On the Best PARAMOUNT CONDENSERS Specially Grounded — Annealed — and Pitch Polished Write for free Descriptive Literature, Dept. B PARAMOUNT LENS CORP., 41 Union Sq., New York Simplified Electricity for Projectio n is ts (Continued from page 3204) If the load is decreased, the motor will speed up and the back voltage will increase and this in turn will cause the current to drop to the proper value. Indeed, the back voltage, is very useful for determining what to do in order to change the winding of motors. Thus, if conductors are taken off an armature, the speed will be increased because the armature must now rotate faster in order to generate the proper amount of back voltage. If armature conductors are added the speed will be decreased. Brush Shifting As with generators, commutation is also a serious problem with motors and brush shifting must be resorted to where interpoles are not supplied. If the rotation of the motor shown in Fig. 73 is assumed to be the same as that shown in the case of the generators described in Lesson VI, Part III, it will be noted that the current in the motor is opposite to that in the generator. This, of course, will cause the field to be weakest under the opposite sides of pole tips and hence the brushes will have to be shifted back against the direction of rotation instead of forward in the same direction. This holds for all motors and generators. Cornerstone for New Elrae Theatre Work has so far progressed on the new Elrac theatre and office building in Philadelphia, which will cost $4,500,000 when completed, that the date for the cornerstone laying has been officially fixed for Thursday, June 28. The mayor of the city and numerous prominent personalities in motion picture affairs, as well as public officials, will participate in the celebration and exercises. The new structure was begun last August at Eleventh and Market streets, the site of the old Bingham Hotel. The theatre will seat 3,000 persons, and will have many innovations in modern construction features. The theatre will be owned and operated jointly by the B. F. Keith Vaudeville interests and by the Stanley Company of America. Vaudeville will be presented in addition to the programs of feature films. — Martin. La Porte — Architects Docher & Larson, 6250 S. Halsted St., Chicago, 111., drawing plans for one story $75,000 theatre, 100 x 130, owner, withheld. A Special Debrie Offer Regular model Debrie Camera wooden case, slightly used, equal to new, complete with automatic dissolving shutter, special focusing device, special masking device, two-inch F3.5 Krauss Tessar lens, three-inch F3.5 Krauss Tessar lens, eight magazines, two leather cases, rewinder, two sets of masks, sunshade and brand new Precision Ball Bearing Tripod. Regular List, $1560.00 Special Offer, $850.00 M OTION PICTURC APPARATUS CO. | INCOHPORATEO 118 West 44th Street New York City Opposite Belasco Theatre Ownership Management of Willoughby, Inc. AMERICA'S FINEST CONCERT ORGAN The Organ With That Distinctive Tone Which Charms Your Audience The Marr &■ Colton Co., Warsaw, N. Y.