Machine element or mechanism – Gearing – Toothed gear and recirculated unconnected elements
Patent
1976-04-13
1977-08-09
Herrmann, Allan D.
Machine element or mechanism
Gearing
Toothed gear and recirculated unconnected elements
192 67P, 192 82T, 192 83, 169 60, F16D 4325, F16D 1110
Patent
active
040403041
ABSTRACT:
An improved clutch is described for use in a smoke and fire protection system comprising a pulley which in the normal operating position is engaged by a torque transmitting means so that the pulley may be controlled by an associated drive mechanism such as a stall motor or break motor. Either upon receipt of a signal from a remote source or upon an increase in the ambient temperature surrounding the apparatus, such as might occur during a fire, a heat responsive means disengages the pulley from the torque transmitting means thereby allowing the pulley to freely rotate about its axis to deploy its associated fire protection equipment. In the preferred embodiment, one or more bimetallic links of either "straight" or serpentine configurations are employed to move the pulley axially along its axis of rotation, thereby disengaging the pulley from an adjacent associated drive plate.
REFERENCES:
patent: 2021413 (1935-11-01), Gille
patent: 2320900 (1943-06-01), Walz
patent: 2503261 (1950-04-01), Hall
patent: 2503262 (1950-04-01), Hall
patent: 2509948 (1950-05-01), White
patent: 2570515 (1951-10-01), Bonham
patent: 3261230 (1966-07-01), Rudnicki
patent: 3382852 (1968-05-01), De Lorean
patent: 3396909 (1968-08-01), Seifert
patent: 3730151 (1973-05-01), Smith et al.
patent: 3889314 (1975-06-01), McCabe
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