Circuitry and method for controlling power to fastener machine s

Electricity: power supply or regulation systems – Input level responsive – Phase controlled switching using electronic tube or a three...

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323325, 323326, 361160, 361206, G05F 502

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active

048109525

ABSTRACT:
A method and apparatus for controlling power delivered to a fastening machine solenoid comprises a half wave rectifier, a filter network, an adjustable frequency generator and a pulse conditioning circuit. The frequency of the frequency generator is varied in accordance with fluctuations in peak AC line voltage and is input to driving circuitry which engages a solenoid at a predetermined time and for a specific amount of time. By increasing or decreasing the solenoids on time in accordance with power line voltage fluctuations, a pulse of constant power will be received by the solenoid, regardless of fluctuations in power line voltage.

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patent: 4425611 (1984-01-01), Easter
patent: 4468569 (1984-08-01), Norris
patent: 4490771 (1984-12-01), Huber et al.
patent: 4500938 (1985-02-01), Dulin

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