Blown fuse indicator

Details Blown fuse indicator Blown fuse indicator

1976-03-15

1977-05-10

Hickey, Robert J.

Electricity: electrothermally or thermally actuated switches

Electrothermally actuated switches

Fusible element actuated

337244, H01H 8530

Patent

active

040231330

ABSTRACT:
A blown fuse indicator is supported by a socket separate from the casing of the fuse whose blowing the indicator is supposed to indicate. The indicator includes an indicating pin of relatively large size under the bias of a relatively powerful helical spring. The pin is biased in a direction at right angles to the longitudinal axis of the fuse, or of its casing, respectively. Normally the pin is restrained by a latch projecting into a recess in the lateral wall of the pin. The latch is spring biased in the pinrestraining position thereof. When the bias of the latch is overcome by an external force, the pin moves to the indicating position thereof.

REFERENCES:
patent: 891323 (1908-06-01), Brown
patent: 2249014 (1941-07-01), Lingal et al.
patent: 3621433 (1971-11-01), Beicher
patent: 3742414 (1973-06-01), Gittin et al.

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