Abstract A switching circuit for energizing a magnetic oscillating driving system for a time-keeping device, comprising driving coil means for controlling the magnetic oscillating driving system, switching means controlled by impulses of a constant frequency, said switching means including at least one transistor responsive to the impulses of constant frequency, said switching means energizing said driving coil means, a delay network connected to the input of the switching means for delaying the response of said switching means to the impulses of constant frequency whereby the switching means provides output pulses of narrower widths than the width of the impulses of constant frequency, said switching means consisting of an additional transistor connected in parallel across the output of the transistor responsive to the impulses of constant frequency, and control coil means responsive to the magnetic system for controlling the additional transistor in accordance with the movement of the magnetic system.
A switching circuit for energizing a magnetic oscillating driving system for a timekeeping device, comprising driving coil means for controlling the magnetic oscillating driving system, switching means controlled by impulses of a constant frequency, said switching means including at least one transistor responsive to the impulses of constant frequency, said switching means energizing said driving coil means, a delay network connected to the input of the switching means for delaying the response of said switching means to the impulses of constant frequency whereby the switching means provides output pulses of narrower widths than the width of the impulses of constant frequency, said switching means consisting of an additional transistor connected in parallel across the output of the transistor responsive to the impulses of constant frequency, and control coil means responsive to the magnetic system for controlling the additional transistor in accordance with the movement of the magnetic system.
Claim 2
Dependent Claim
148 words
A switching circuit for energizing a magnetic oscillating driving system for a timekeeping device, comprising driving coil means for controlling the magnetic oscillating driving system, switching means controlled by impulses of a constant frequency, said switching means including at least one transistor responsive to the impulses of constant frequency, said switching means energizing said driving coil means, a delay network connected to the input of the switching means for delaying the response of said switching means to the impulses of constant frequency whereby the switching means provides output pulses of narrower widths than the width of the impulses of constant frequency, said switching means consisting of an additional transistor connected in parallel across the output of the transistor responsive to the impulses of constant frequency, and control coil means responsive to the magnetic system for controlling the additional transistor in accordance with the movement of the magnetic system.
Claim 3
Dependent Claim
28 words
A switching circuit according to claim 1, wherein the time constant of the resistance and capacitance is less than the natural oscillation period of the magnetic oscillating system.