Unidirectional limit switch actuator element

Details Unidirectional limit switch actuator element Unidirectional limit switch actuator element

1974-04-10

1976-02-03

Scott, James R.

Electricity: circuit makers and breakers

Limit switch

57 54, H01H 316

Patent

active

039366200

ABSTRACT:
The utility and range of application of conventional electrical limit switches is greatly increased by the provision on the pivoted switch actuating arm or lever of a unidirectional actuator attachment. The attachment element is pivoted to the arm and cooperates with a stop lug on the arm to render the element active for moving the switch actuator arm in response to engagement of the element by an object moving in one direction relative to the element. When the element is engaged by an object moving in the opposite direction, it yields relative to the arm and is incapable of moving the arm to actuate the switch. In an alternate operating mode, the attachment element may be rendered rigid with the switch arm to form an effective extension thereof.

REFERENCES:
patent: 2533040 (1950-12-01), Petrak
patent: 3803824 (1974-04-01), Williamson et al.

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