Electricity: circuit makers and breakers – Retarded – Chain or flexible drive
Patent
1988-10-03
1990-08-14
Scott, J. R.
Electricity: circuit makers and breakers
Retarded
Chain or flexible drive
200 34, 239 56, 239 57, H01H 700
Patent
active
049489275
ABSTRACT:
A visco-elastic delayed actuator and system are provided, including a visco-elastic delayed actuator which includes a restorable and collapsible structure having at least two confronting surfaces and a resilient member interconnecting the surfaces. A visco-elastic delay member including visco-elastic adhesive on at least one of the confronting surfaces of the structure provides a visco-elastic holding force when the confronting surfaces come into mutual contact with the visco-elastic adhesive. The delayed actuator system also includes a support section and an operator member mounted in the support section. A resilient member in the structure biases the operator member in a first state while permitting the operator member to be selectively switched to a second state, thereby initiating a visco-elastic delay period. In the second state, the collapsible, restorable structure is held in the collapsed position by the visco-elastic holding force of the visco-elastic adhesive coming into contact with the confronting surfaces of the structure. The resilient member in the structure gradually urges apart the adhered confronting surfaces, generally restoring the structure and moving the actuator towards its initial position to end the visco-elastic delay period.
REFERENCES:
patent: 3585320 (1971-06-01), Goldstein
patent: 4742189 (1988-03-01), Carter et al.
patent: 4791251 (1988-12-01), Carter et al.
Iandiorio Joseph S.
Piezo Electric Products, Inc.
Scott J. R.
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