International projectionist (Jan-Dec 1938)

City, being the first installation in 1930.) . . . Television is becoming increasingly popular, with 5,000 sets in operation in the London area alone. The B. B. C. broadcasts three shows a day, 11 a.m.-12 noon; 3 p.m.4 p.m., and 9 p.m. to 10 p.m. Vision is on 6.67 meters and the sound on 7.23 meters. The range is limited to around 50 miles. The programs consist mostly of news reels, acts, orchestras, lectures and playlets. • Television in England I visted Selfridge's Television Theatre and saw the following sets demonstrated: "His Masters Voice," Baird, Marconi, Halcyon and Cossor. They come in three models: straight television, all-wave radio and television, and electric victrola all-wave radio and television. Prices range from $200 to $600. In some makes one views the picture direct, and in others via a mirror. The size of picture varies from 8 x 6 to 10J/2 x 14, meaning inches of course. They all use the cathode ray tube from 9 to 15 in. in size. The reception of both sound and picture on all the sets I saw was remarkably good. The color tone of the different picture's varied somewhat, and one could notice a ILEX F: 2.5 Modern projection demands a lens that will transmit highintensity lamp output with full efficiency together with sharp, contrasty, color-free projection. Prove through a trial installation that ILEX lenses will do this. Write direct or to your dealer. Literature sent upon request. ILEX OPTICAL CO. ROCHESTER, NEW YORK certain amount of distortion when several sets were working side by side simultaneously. However, while it was interesting to see the progress made in television, a lot is still left to be desired and vast improvements will have to be made before television could begin to compete with the present sound motion picture . . . The amusement world as a whole has become quite Americanized due mostly to t'alking pictures and tourists. However, they still retain many customs that we do not have over here. Smoking is allowed in practically all theatres, cigarettes and chocolates being sold and tea and ice cream served during the performance! All the larger theatres have either a cafe or bar, or both, and some even have a dance hall as well. All theatres have a price range, some as many as five, according to seating location. Employes all work far more hours per week for a lot less than the prevailing wages in theatres in America. ACADEMY THEATRE SOUND EQUIPMENT PROPOSALS (Continued from page 15) to cover a vertical angle of 65°. Rear Radiation: Past practice indicates the extreme need for reducing rear radiation from loud-speakers, and it is desirable that loud-speakers be manufactured which have a minimum of rear radiation. Dividing Networks: The dividing network shall be designed to have an attenuation of approximately 12 db per octave. Part V — Servicing Networks Meters and Circuit Arrangements: Accessible terminals for a volume indicator and a switch for the substitution of a resistance equivalent to the loudspeaker load should be provided at the output of the power amplifier in order that the electrical characteristic may be conveniently measured. It is further recommended that a meter or its equivalent be made available on the various vacuum tubes, as it is difficult to service equipment which does not have adequate metering facilities. Wear: The design of the sound head All New Annourwing . . . c^bt1X For all projectors and sound equipments All take-ups wind film on 2, 4 or 5 inch hub reels. The Clayton Rewinder For perfect rewinding on 2000-foot reels. CLAYTON PRODUCTS CO. 31-45 Tibbett Avenue New York, N. Y. #5* MAGNESIUM COPPER SULPHIDE RECTIFIERS • ••and follow the LEADERS! ONLY FOREST . . . Magnesium Copper-Sulphide Rectifying Units offer you DEPENDABILITY without MULTIPLICITY. Each unit is a simple but effective assembly of magnesium discs, copper-sulphide discs and a combination of terminal and radiator plates which dissipate the heat developed in the rectification process. ONLY FOREST . . . Magnesium Copper-Sulphide rectifier discs are made in several sizes capable of handling from a FEW AMPERES up to SEVERAL HUNDRED AMPERES per disc . . . thus rectifiers of a very large ampere-capacity can be made without connecting a number of rectifying junctions in multiple ... A FEATURE NOT FOUND IN OTHER TYPES OF DRY-DISC RECTIFIERS. ONLY FOREST . . . Magnesium Copper-Sulphide rectifiers are offered in the now famous TWIN MODELS ... or TWO DEPENDABLE RECTIFIERS IN ONE . . . The TWIN 50 type is an ideal power supply for TWO Suprex arcs of 40 to 50 amperes each . . . the TWIN 65 type will take care of requirements of 45 to 65 amperes on each arc . . . ONLY FOREST . . . Magnesium Copper-Sulphide rectifiers offer you, because of their EXCLUSIVE characteristics, the ideal means of supplying D.C. for the projection arc, and at the same time definitely improving the appearance of your picture. Complete operating data gladly furnished upon request. MAGNESIUM-COPPER SULPHIDE RECTIFIERS JULY 1938 29