In-operation indicating device for clocks

Claim 2

An in-operation indicating device for a clock comprising a disk member periodically moved by a clock device, a power source battery for driving said clock device, a switch device positioned adjacent to said disk member and operatively coupled thereto for effecting periodically its switching action by the rotation of said disk member, a light-emitting diode connected to said power source battery through said switch device, and a capacitor connected in parallel to a series circuit of said switch device and light-emitting diode and charged by said power source battery when said light-emitting diode is disconnected from said power source battery by said switch device and discharged to make said light-emitting diode emit light for an extremely short time at the moment when said switch device is closed.

Claim 3

An in-operation indicating device for a clock according to claim 1, in which said disk member comprises a rotary shaft and said switch device comprises an electro-insulating rotary disk being fixed to said rotary shaft, plurality of electro-conductive foils radially arranged on said rotary disk and a pair of contact pieces capable of contacting electro-conductive foils.

Claim 4

An in-operation indicating device for a clock according to claim 1, in which said disk member comprises a rotary shaft and said switch device comprises an electro-insulating rotary disk fixed to said rotary shaft and having plurality of teeth on the peripheral surface, an electro-conductive disk mounted to said rotary disk and electrically connected to said rotary shaft, and a contact piece arranged engageably with said teeth and having a tip portion that contacts the peripheral surface of said electro-conductive disk only when being fitted in the root of said teeth.

Claim 5

An in-operation indicating device for a clock comprising a disk member periodically moved by a clock device, a switch device positioned adjacent to said disk member and operable to effect periodically its switching action by the rotation of said disk member, a light-emitting diode connected to said switch device, a transistor having the collector electrode connected to one terminal of said light-emitting diode, a capacitor and resistor connected in parallel between said switch device and the base electrode of said transistor, and a power source battery having one terminal connected between said switch device and the other terminal of said light-emitting diode and having the other terminal connected to the emitter electrode of said transistor.

Claim 6

An in-operation indicating device for a clock comprising a disk member periodically moved by a clock device, a switch device positioned adjacent to said disk member and operable to effect periodically its switching action by the rotation of said disk member, a light-emitting diode connected to said switch device, a transistor having the collector electrode connected to one terminal of said light-emitting diode, a capacitor and resistor connected in parallel between said switch device and the base electrode of said transistor, and a power source battery having one terminal connected between said switch device and the other terminal of said light-emitting diode and having the other terminal connected to the emitter electrode of said transistor.

Claim 7

An in-operation indicating device for a clock comprising a magnet member periodically moved by a clock device, a power source battery for driving said clock device, a switch device including a pick-up coil positioned adjacent to said magnet member for generating an induced voltage in response to motion of said magnet member for effecting periodic switching action by the rotation of said magnet member, a light-emitting diode coupled to said power source battery through said switch device, said switch device further including a first transistor having a collector electrode connected to one terminal of said light-emitting diode, an emitter electrode connected to one terminal of said power source battery, and a base electrode connected to said pick-up coil, a second transistor having A collector electrode connected to the other terminal of said light-emitting diode, and an emitter electrode connected to the other terminal of said power source battery, a signal generating device connected to the base electrode of said second transistor, and a capacitor connected in parallel to a series circuit of said light-emitting diode and said second transistor.

Claim 8

An in-operation indicating device for a clock comprising a magnet member periodically moved by a clock device, a power source battery for driving said clock device, a switch device including a pick-up coil positioned adjacent to said magnet member for generating an induced voltage in response to motion of said magnet member for effecting periodic switching action by the rotation of said magnet member, a light-emitting diode coupled to said power source battery through said switch device, said switch device further including a first transistor having a collector electrode connected to one terminal of said light-emitting diode, an emitter electrode connected to one terminal of said power source battery, and a base electrode connected to said pick-up coil, a second transistor having A collector electrode connected to the other terminal of said light-emitting diode, and an emitter electrode connected to the other terminal of said power source battery, a signal generating device connected to the base electrode of said second transistor, and a capacitor connected in parallel to a series circuit of said light-emitting diode and said second transistor.

Claim 9

An in-operation indicating device for a clock comprising a magnet member periodically moved by a clock device, a power source battery for driving said clock device, a switch device including a pick-up coil positioned adjacent said magnet member for generating an induced voltage in response to motion of said magnet member for effecting periodic switching action by the rotation of said magnet member, said switch device further including a first transistor having a collector electrode, said first transistor having an emitter electrode connected to one terminal of said power source battery and a base electrode connected to said pick-up coil, a second transistor having an emitter electrode connected to the collector electrode of said first transistor and said second transistor having a collector electrode connected to one terminal of a first light-emitting diode, a second light-emitting diode having one terminal connected to the other terminal of said first light-emitting diode, a third transistor having a collector electrode connected to the other terminal of said second light-emitting diode, and an emitter electrode coupled to the power source battery, a signal generating device having an output coupled to the base electrodes of said second and third transistors, and a capacitor connected between the emitter electrode of said second transistor and the common connection of the other terminal of said first light-emitting diode and the one terminal of said second light-emitting diode.

Claim 10

An in-operation indicating device for a clock comprising a magnet member periodically moved by a clock device, a power source battery for driving said clock device, a switch device including a pick-up coil positioned adjacent said magnet member for generating an induced voltage in response to motion of said magnet member for effecting periodic switching action by the rotation of said magnet member, said switch device further including a first transistor having a collector electrode, said first transistor having an emitter electrode connected to one terminal of said power source battery and a base electrode connected to said pick-up coil, a second transistor having an emitter electrode connected to the collector electrode of said first transistor and said second transistor having a collector electrode connected to one terminal of a first light-emitting diode, a second light-emitting diode having one terminal connected to the other terminal of said first light-emitting diode, a third transistor having a collector electrode connected to the other terminal of said second light-emitting diode, and an emitter electrode coupled to the power source battery, a signal generating device having an output coupled to the base electrodes of said second and third transistors, and a capacitor connected between the emitter electrode of said second transistor and the common connection of the other terminal of said first light-emitting diode and the one terminal of said second light-emitting diode.