초록 ▼

A timer device includes a counter which counts output pulses from an oscillator, and, when counting a prescribed number of pulses, sends forth an output signal, a transistor rendered conductive in response to the output signal from the counter, and a relay energized when the transistor is rendered c

A timer device includes a counter which counts output pulses from an oscillator, and, when counting a prescribed number of pulses, sends forth an output signal, a transistor rendered conductive in response to the output signal from the counter, and a relay energized when the transistor is rendered conductive. A light-emitting diode connected is in parallel with the current path of the transistor to serve as an indicator as well as a latch for the relay.

대표청구항 ▼

A timer device comprising: a power supply terminal; a frequency variable oscillating circuit; a counter circuit for counting an output signal from said oscillating circuit and generating a first output signal from a first output terminal thereof when the count of the counter circuit has reached a pr

A timer device comprising: a power supply terminal; a frequency variable oscillating circuit; a counter circuit for counting an output signal from said oscillating circuit and generating a first output signal from a first output terminal thereof when the count of the counter circuit has reached a prescribed value; switching means coupled to said first output terminal of said counter circuit and whose operation is controlled by said first output signal from said counter circuit; a relay circuit connected between said power supply terminal and switching means and being energized responsive to a turn-on operation of said switching means; and first light-emitting diode means connected in parallel with said switching means and having a current voltage characteristic such that when said switching means is turned off after energization of said relay circuit, current flow through said first light-emitting diode means maintains said relay circuit energized, said current flow, however, being insufficient to initially energize said relay circuit from a de-energized state, said first light-emitting diode means emitting light when said relay circuit is de-energized and being extinguished when said relay circuit is energized by said switching means.