Motion picture projector operable on different a. c. sources

Claim 1

A MOTION PICTURE PROJECTOR FOR CONNECTION TO A.C. POWER SOURCES OF DIFFERENT VOLTAGE AND FREQUENCY, AND COMPRISING TERMINAL MEANS, A SINGLE-PHASE INDUCTION MOTOR HAVING A CONDENSER FOR PHASE DISPLACEMENT OF THE CURRENT THEREIN, A SHAFT FOR DRIVING SEVERAL OF THE COMPONENTS OF THE PROJECTOR, A VARIABLE SPEED TRANSMISSION DRIVINGLY CONNECTING SAID MOTOR AND SAID SHAFT, A TRANSFORMER HAVING PRIMARY AND SECONDARY WINDINGS VARIABLE CONNECTING MEANS FOR CONNECTING SAID PRIMARY WINDING TO SAID TERMINAL MEANS AND SAID MOTOR TO SAID SECONDARY WINDING, A SECOND CONDENSER ADAPTED TO BE CONNECTED IN PARALLEL WITH SAID FIRST CONDENSER, SWITCH MEANS FOR CONNECTING SAID SECOND CONDENSER IN PARALLEL TO SAID FIRST CONDENSER, AND MEANS FOR SIMULTANEOUSLY ADJUSTING (A) SAID VARIABLE TRANSMISSION, (B) SAID CONNECTING MEANS, ONCE FOR POWER SOURCE VOLTAGE ADAPTION AND AGAIN FOR FREQUENCY ADAPTION AND (C) SAID SWITCH MEANS FOR SAID SECOND CONDENSER TO CORRESPOND TO THE FREQUENCY OF THE A.C. POWER SOURCE TO WHICH THE PROJECTOR IS CONNECTED.