Automatic reversing system for shredder

Details Automatic reversing system for shredder Automatic reversing system for shredder

1982-09-23

1985-01-22

Smith, Jr., David

Electricity: motive power systems

Induction motor systems

Reversing

318753, H02P 320

Patent

active

044954565

ABSTRACT:
An automatic reverse system for a shredder machine automatically causes reversal of the shredder motor when the system becomes jammed. A centrifugal switch connected with a starter winding of the drive motor disconnects power feed thereto when the motor is rotating above a predetermined speed. A manually actuated switching circuit in combination with the centrifugal switch initially energizes the system for forward operation. When a jam occurs, the centrifugal switch together with the switching circuit automatically causes a reversal in the direction of rotation of the motor, the reverse operation continuing until the operator manually actuates a switch to deenergize the system or when an automatic switch halts reverse rotation after a predetermined time period.

REFERENCES:
patent: 2863109 (1958-12-01), Meyer
patent: 2894189 (1959-07-01), Enright
patent: 3087162 (1963-04-01), Brown
patent: 3720844 (1973-03-01), Sahs

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