Control circuit adapted to control movement of a pintle relative

Details Control circuit adapted to control movement of a pintle relative Control circuit adapted to control movement of a pintle relative

1979-01-02

1980-08-12

Ruggiero, Joseph F.

Boots, shoes, and leggings

364473, 364607, 364858, 425141, 425381, G06G 766, G05D 503, B28B 2152

Patent

active

042176352

ABSTRACT:
A control circuit is adapted to control the movement of a pintle relative to the die head of extrusion apparatus. A command signal is supplied to a signal generator, which produces a first output signal in the form of a series of continuous voltage triangles, and a second output signal in the form of unit pulses. An impedance matrix contains a plurality of potentiometers which may be remotely connected to a summing amplifier. The potentiometers are arranged in a numerical order. Odd-numbered potentiometers are supplied with the triangular output signal from the signal generator. Even-numbered potentiometers are supplied with the signal generator triangular output signal, but which has been phase-shifted by half the width of one triangle. The pulse output from the signal generator is supplied to a decoder, which successively connects pairs of numerically-adjacent potentiometers with the summing amplifier during overlapping time intervals. During the cycle of operation, only a pair of numerically-adjacent potentiometers will be connected to the summing amplifier at any point in time. The output of the summing amplifier is a control signal, which may be used to control the movement of a pintle relative to a die head.

REFERENCES:
patent: 3649845 (1972-03-01), Foch
patent: 3712772 (1973-01-01), Hunkar
patent: 3831016 (1974-08-01), Nathan
patent: 3865528 (1975-02-01), Roess
patent: 4011493 (1977-03-01), Fukase et al.
patent: 4159293 (1979-06-01), Fukase et al.

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