Rotary shafts – gudgeons – housings – and flexible couplings for ro – Overload release coupling – Torque transmitted via frangible element
Patent
1981-02-27
1983-07-12
Petrakes, John
Rotary shafts, gudgeons, housings, and flexible couplings for ro
Overload release coupling
Torque transmitted via frangible element
464 30, F16D 900
Patent
active
043928358
ABSTRACT:
A disconnect arrangement is useful for disconnecting high speed generators, such as those utilized in aircraft electrical systems, from a driving source, such as an aircraft engine. The disconnect coupling includes splined members at either end of a stub shaft which are coupled respectively to the generator and the engine. A carbide knife-edged plate is pivotable about one end of the plate and, in the normal or deactivated position, an extension of a solenoid armature prevents the knife-edge from contacting the stub shaft. When energized, the solenoid armature is retracted releasing its engagement with the knife-edged plate, and a spring forces the knife-edge to engage the stub shaft at a relatively thin-walled portion thereof. Friction generated causes localized heating and the relatively thin wall of the stub shaft becomes plastic, the stub shaft then separating into two portions effecting disconnection of the generator from the engine. A spring loaded, conical point bearing internal of the stub shaft maintains separation of the two portions, thus allowing the generator to coast to a stop while permitting the engine to remain operational.
REFERENCES:
patent: 2727371 (1955-12-01), Troeger et al.
patent: 2862375 (1958-12-01), Miller
patent: 3427826 (1969-02-01), Anderson
patent: 3620045 (1971-11-01), Butterfield
Butterfield John L.
Siddiqui Ehtisham U. A.
Wenzel James L.
General Electric Company
Kuch Bailin L.
Petrakes John
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