Pressing machine, particularly household refuse compactor and co

Details Pressing machine, particularly household refuse compactor and co Pressing machine, particularly household refuse compactor and co

1975-06-18

1978-06-20

Schaefer, Robert K.

Electricity: motive power systems

Motor-reversing

Periodic- or intermittent-reversing

318258, 318286, H02P 728

Patent

active

040964213

ABSTRACT:
The pressing machine includes a pressing ram, a drive arrangement for moving the ram from a starting position to an end-of-stroke position and back to the starting position and includes an electric drive motor. A control arrangement establishes the end-of-stroke position for the ram. The control arrangement includes a direction-reversing circuit connected to the drive arrangement for reversing the direction in which the drive arrangement moves the ram and includes a direction-reversing relay arrangement having a current path for activating current. A controllable electronic switch is connected to the activating current path for controlling the activation of the direction-reversing relay arrangement. A control-signal-generating circuit controls the conductivity of the electronic switch by generating and applying to the control input of the electronic switch a control signal dependent at least upon the loading of the drive motor.

REFERENCES:
patent: 3543676 (1970-12-01), Brown
patent: 3628112 (1971-12-01), Gross
patent: 3812408 (1974-05-01), Penn et al.
patent: 3817170 (1974-06-01), Mayer

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