F - Mech Eng,Light,Heat,Weapons – 16 – H
Patent
F - Mech Eng,Light,Heat,Weapons
16
H
74/59
F16H 29/20 (2006.01) F16D 23/08 (2006.01) F16D 25/08 (2006.01) F16D 48/06 (2006.01)
Patent
CA 1160474
ABSTRACT "PAWL AND RATCHET MECHANISM" A pawl and ratchet mechanism has a baulking member 4a which may be set in both a ratcheting and a pawl free condition in which the pawl and ratchet components 9, 18 of the mechanism are respectively in and out of engagement with each other, the baulking member 4a also being settable in a baulking condition which prevents relative movement of the said components 9, 18, into the ratcheting condition, the baulking member 4a being maintained in the baulking condition when the relative rotation of the said components is inappropriate to permit the mechanism to be operated in the ratcheting condition. A thrust member 24 is engageable with the baulking member 4a and is movable in first and second directions in which the baulking member 4a is respectively moved towards and away from the ratcheting condition. A solenoid valve 34 is settable in first and second conditions in which, in operation, thrust is imparted to the thrust member 24 to cause the latter to move respectively in the said first and second directions and detector means 40-46 detects when the baulking member 4a has moved into the baulking condition and when the baulking member 4a has moved out of the baulking condition and when the baulking member 4a has moved out of the baulking condition and into the pawl free condition, the detector means 40-46 controlling the setting of the solenoid valve 34 so that, in operation, when the baulking member 4a is in the baulking condition, the solenoid valve 34 is so set that the thrust moves the baulking member 4a towards the pawl free condition, and when the baulking member 4a has moved into the pawl free condition, the solenoid valve 34 is so set that the thrust moves the baulking member 4a towards the ratcheting condition.
388388
Clements Herbert A.
Heybourne Robert H.
Fetherstonhaugh & Co.
S.s.s. Patents Limited
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