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Motion P i c t u r e N e w s
December 6 , 1930
Equipment in the Laboratory Stage
IMPROVEMENTS in sound reproducers predominate in the group of new equipment patented at the U. S. Government Patents Office at Washington, from which reports on new motion picture devices, trade-marks and designs are received regularly for this department. Copies of any of the patents cited below may be obtained by sending fifteen cents (15c) to the Patent Editor of this publication for each copy desired.
The current group of new devices for which patents were recently granted follows :
1,777,283. SOUND-PRODUCING DEVICE. Austin B. Cosgrave, Beachwood, N. J., assignor to The Gamewell Company, Newton Upper Falls, Mass. ,a Corporation of Massachusetts. Filed Apr. 6, 1929. Serial No. 353,213. 12 Claims. (CI. 116—147.)
1. A siren having a stator, a rotor, driving means, means actuated by the driving means for shifting the relative position axially of the rotor and stator, the same comprising interengaging, relatively movable members, one presenting an internally threaded dash-pot cylinder having closed ends and the other an externally threaded dash-pot piston, one of said members being movable axially with relation to the other on relative rotation thereof, said cylinder having
a restricted passage connecting the opposite ends of said cylinder about said piston for establishing a driving connection between the rotor and driving means through said axial movement and through the engagement of said piston with an end of said cylinder.
1,778.671. SUSPENSION MEANS FOR SOUND REPRODUCING DEVICES. Douglas Heather Johnson, Coombe Pines, Kingston Hill, England. Filed Sept. 24, 1928, Serial No. 308,047, and in Great Britain, Mar. 15, 1928. 12 Claims. (CI. 181—
31).
1. In a sound reproducing device comprising a vibrating diaphragm formed of material capable of being distorted within itself by driving impulses corresponding to sound waves, flexible means supporting said diaphragm at a plurality of points, said flexible supporting means being arranged relative to said surface of the diaphragm to permit free movement thereof in a direction parallel with the driving force and to permit the diaphragm to be freely deviated from its normal shape wyhen vibrating. 1,778,402. ELECTROMAGNETIC SOUND RE PRODUCER. Percy Rootes. Windsor, England, assignor to Brandes Laboratories, Inc., Newark, N. J., a Corporation of New Tersey. Filed June 11, 1926. Serial No. 115,210. 4 Claims. (CI. 179—146.)
1. A loud speaker reproducer comprising in combination an apertured panel structure, a frame member arranged to snugly fit within said apertured panel structure, a conical shaped sound reproducing diaphragm, an electromagnetic driver carried by said frame member, and a plurality of abutments carried by said panel structure for engagement by said frame member for supporting said frame member in said panel structure for acoustically coupling said conical shaped sound reproducing diaphragm with said panel structure.
Reopens Florida House
Tarpo Springs, Fla. — The Royal, which has been dark this summer, has been reopened by H. Pitman, former owner of the two Clearwater houses which he sold to the Sparks circuit. Sound is being installed. Clarence Rollins, who was Pitman's assistant at Clear water, is holding down a like post at the Tarpon house.