Motor speed control device

Claim 1

For use in a tape player having an amplifier which produces current only during the playing of a recorded message on tape a motor, a first power source which under normal playing conditions provides a pre-determined amount of current to said amplifier and to said motor to reel a tape through said tape player and wherein said motor reels said tape at a faster speed upon receiving additional current, a device for selectively fast reeling said tape by supplying said motor with additional current, comprising: (a) rectifier means for receiving said amplifier current and converting said current to direct current; (b) a switching means; (c) a transistor switching means; (d) a second power source; (e) a silicon controlled rectifier, said switching means connected in series to said rectifier means and to said silicon controlled rectifier's gate, said switching means being momentarily activated when it is desired to increase said motor's speed, said silicon controlled rectifier having an anode connected to said rectifier means and a cathode connected to said transistor switching means, said current flows between said cathode and anode after current has passed through said base and until said amplifier stops producing current, said transistor switching means having a base connected to said cathode, a collector connected to said motor and an emitter connected to said second power source, said transmitter switch means allowing current from said second power source to pass to said motor only when current flows from said cathode to said anode.