Signals and indicators – Bells – Gong type
Patent
1976-06-11
1977-08-09
Swisher, S. Clement
Signals and indicators
Bells
Gong type
340376, G08B 534
Patent
active
040403823
ABSTRACT:
An indicator for an electrical device such as a relay or the like is disclosed for indicating the condition of the contacts in the relay or similar device having a contact operator element movable inwardly with respect to the casing when the relay is operated. An indicating element is slidably mounted in a guide means with the indicating element being movable between a first and a second position within the guide means. Means is provided for holding the indicating element in the first position until the relay is operated. The holding means includes mechanical stop means and magnetic means for insuring positive engagement between said indicator element and said mechanical stop means. Movement of said contact operator element inwardly with respect to the relay casing causes disengagement of the indicating element by said holding means thereby allowing said indicating element to move from said first position to the second position thereby indicating operation of the relay or other electrical device. The indicating element may be provided with a cover which allows viewing of the indicator element only when the indicator element is in one of the two positions. The indicator element is preferably moved from the first position to the second position by means of gravity. The indicator element in the second position prevents resetting of the relay until the indicator element is moved back to its first position.
REFERENCES:
patent: 935935 (1909-10-01), Smith
Corr Denis E.
Petock Michael F.
Swisher S. Clement
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