American cinematographer (Oct 1933)

236 American Cinematographer • October 1933 What your INDOOR MOVIES demand— Solite Reflectors Deliver —and with PLUS advantages that please pocketbooks! More light, better light! That’s what the SOLITE UNIT REFLECTOR effects! Its unique mirror lens concentrates and mul- tiplies the lighting output of the power- ful T20-500 watt bulb it uses—delivers, by test, nearly twice the light for the same lighting cost. No light wastage! Longer bulb life is assured by Solite’s pat- ented Ventilating Feature. Prevents rapid blackening and loss of lighting efficiency. With SOLITE UNITS any desired lighting arrangement is possible—-singly, in pairs, threes or in big multiple banks— on the same Solite Tripod! Only in the SOLITE UNIT REFLECTOR do you get all of these indispensable advan- tages! Write now for full story that ex- plains how SOLITE REFLECTORS save mon- ey on your indoor movies (including color movies) and still photographs— and pro- duce better pictures! Over 30% more light by using the new CONCENTRATOR LENS Diffuses the full light output—without wastage. The soft, even diffusion is a priceless adjunct in indoor photography, especially color movies. Fits in a jifry over any SOLITE REFLECTOR. PRICES Solite Unit Reflector $7.50. With Jr. Tri- pod, $11. Special Solite Kit (No. 3) containing 3 Solite Units, 2 Tripods, cables, crossbar. Complete in strong carrying case, $42.50 Solite Concentrator Lens, $3.50. Note: These prices effective for a short time only. All prices slightly higher west of Rockies. Communicate direct with SOLITE SALES CO. 1373 Sixth Ave., New York DEALERS: ASK ABOUT VALUABLE SALES FRANCHISE ARRANCEMENT! SOLITE UNIT Preferred by the Light-Wise from Coast to Coast Slow Motion Reveals Machine Defects When, as often happens, a machine designed and built on apparently sound and proved principles just doesn’t oper- ate correctly, what can be done to deter- mine the cause of failure? In such cases, design experts are now having recourse to the motion picture. They set the machine in motion and take “slow” movies of it as it operates. These movies reveal the behavior of mechanisms mov- ing too rapidly for satisfactory observa- tion by the human eye, and many baffling machine problems have been solved in this manner. Says R. Fawn Mitchell, manager of the technical department of the Bell £r Howell Company: “One of the first in- stances of securing increased efficiency in machine design by means of motion pictures had to do with a high-speed ad- dressing machine which jammed in the envelope in-feed. A micromotion out- fit was arranged to take a close-up of the feeding mechanism with the feeding pawl painted white to facilitate follow- ing its motion. Motion pictures taken at 4,000 frames per minute disclosed that the feeding pawl vibrated at one time and not at another. Each time the pawl vibrated it failed to feed an en- velope. Not only did the pictures show this effect, but they registered the time by means of a high-speed stop watch so that at least a reasonable approximation 16 mm Camera Exposes Insurance (Continued from Page 227 ing it off himself and fighting the heavy down-town traffic. Cases like this are increasing more and more every day. The insurance compan- ies are learning of the great value of the 16mm camera with the present day fast film and fast lenses in detecting these frauds. Some companies have equipped them- selves with complete outfits just for this purpose. The Pacific Electric Railway company have an outfit of this nature. Other investigators are making this sort of detection a specialty for many insur- ance companies and some individuals are giving their entire time over to work with the 16mm camera for insurance companies. Wheels of Industry Continued from Page 220) projector, has been provided with 1200 and 1600 foot reel arms. To be exact, 1200 feet of 16mm film at the rate of 24 frames per second (normal speed for sound), requires 331/2 minutes for projection, and 1600 feet 44 2-3 minutes. However, the statement of half-hour and 45-minute projection periods will probably be more generally used in this connection. The new B & H reels are of all-steel construction. They have the B & H self-threading hub feature. The flanges of the duration of the oscillation could be obtained. With this information the designers were able to effect improve- ments immediately.” “One peculiar advantage that a desig- ner gains by taking motion pictures of a machine may not be apparent at first sight,” says Mr. Mitchell. “The motion picture camera is trained on just the es- sential field of action, and is viewed in a more or less darkened room free from distraction. As a result the attention is centered on the screen and the observer is not subjected to the many distractions of sight or sound which are a necessary concomitant to the actual machine. It is not always necessary to take slow movies to get results. Frequently ordin- ary speed movies will serve the purpose.” have been cut out not only to reduce weight but also to provide ease in thread- ing. New Combination Enlarging Device • E. Leitz, Inc., announces a novel fea- ture in connection with their enlarging apparatus. The popular Valoy Enlarger can now be supplied with attachments whereby it may be used not only for making enlargements, but for reading manuscripts and projecting pictures upon a screen as well. A special rotating film carrier permits the film image to be placed in any de- sirable position, regardless of the posi- tion of the film in the enlarger. A special box may be placed under the lens, where- by film records of manuscripts, legal documents, maps and book pages may be read with ease. On the front of the box is situated a ground glass screen, sloped at a convenient angle. A mirror within the box reflects the image upon the ground glass screen. The user need only seat himself comfortably in front of the screen and view the films, right- side-up and right-side-to. When the enlarger is to be used as a projector for screen projection, a special mirror, mounted upon a universal joint so that it may be placed in any position under the lens, is attached to the en- larger. The image produced by the lens is thus projected upon a screen. The usual opal lamp in this case is replaced with a special clear projection bulb. The feature of this equipment lies in the fact that with one unit the owner can enlarge, project and read his films with the utmost ease and satisfaction. Counter Light Cap • Hugo Meyer & Company announce the acquisition of the famous Worsching Counter-Light Cap manufactured in Ger- many. This light cap is designed to pro- tect the lens when photographing against light rays when pointing the camera to- ward the light source and in some in- stances they claim it is possible to direct