192 clutches and power-stop control – Clutches – Torque responsive
Patent
1984-12-24
1986-07-01
Krizmanich, George H.
192 clutches and power-stop control
Clutches
Torque responsive
192 30W, 192 36, 192 67P, 74665B, 74665E, 74665GA, F16D 110
Patent
active
045974802
ABSTRACT:
A redundant drive having primary and secondary load paths may have a torque sensor to indicate a failure of the primary load path and make a drive connection for transmitting torque through the secondary load path.
The positive engagement torque sensor has a pair of adjacent facing plates connected to coaxial shafts of the secondary load path, with one plate having a series of circularly-arrayed pairs of spaced-apart openings and the other plate having a series of circularly-arrayed movable pins engageable with the first plate and movable within a dead zone between openings of a pair of openings. When there is a failure in the primary load path, the movable pins move into the openings to lock the plates together and provide for torque transmission through the secondary load path. Additionally, the movement of the plates into locked relation causes the functioning of a signalling device to signal the failure of the primary load path through signalling elements including a noncontactable sensor in the form of a magnetic pickup unit which has a magnetic field through which a flag tab may pass upon the lock-up of the plates. The flag tab is part of a flag pivotally carried on one of the plates and having a contoured slot engageable by a flag pin on the other plate to control the position of the flag between an inoperative position and a position in which the flag tab coacts with the magnetic pickup unit to generate a failure signal.
REFERENCES:
patent: 2124965 (1938-07-01), Lind
patent: 2834010 (1958-05-01), Sieradzki
patent: 2951389 (1960-09-01), Wille
patent: 3132730 (1964-05-01), Dahlstrand et al.
patent: 3169178 (1965-02-01), Notchev et al.
patent: 3320772 (1967-05-01), Saxton
patent: 3935754 (1976-02-01), Comollo
patent: 4255946 (1981-03-01), Hansen
patent: 4276758 (1981-07-01), Coman et al.
patent: 4340133 (1982-07-01), Blersch
Krizmanich George H.
Sundstrand Corporation
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