192 clutches and power-stop control – Stop mechanism – Safety device
Patent
1984-01-30
1986-02-25
Cohan, Alan
192 clutches and power-stop control
Stop mechanism
Safety device
72 2, 74616, 100 53, F16D 7104, F16P 100, B30B 1528
Patent
active
045723460
ABSTRACT:
A power press is comprised of a frame, a stationary bed, a ram reciprocally movable toward and away from the bed and a safety guard for preventing movement of the ram toward the ram when the tooling for the press must be repaired or changed. The guard includes a first chain attached to the frame of the press and a second chain attached to the ram and attachable to the first chain to restrict movement of the ram toward the bed. The chains are connectable together at a plurality of locations to enable the combined, attached length of the chains to be adjusted. The adjustability permits the guard to be easily used with a press having a range of shut heights. A normally open power circuit controls the reciprocal movement of the ram. A key for closing the circuit by engagement with a receptacle in the circuit is attached to the first chain. The key is engageable with the receptacle when the chains are unattached and is not engageable with the receptacle when the chains are attached.
REFERENCES:
patent: 1869895 (1932-08-01), Hazenfield
patent: 2357508 (1944-09-01), Ernst
patent: 3370498 (1968-02-01), Persia et al.
Chestnut William R.
Cox Christopher J.
MacKenzie David J.
Parcell Clive L.
Cohan Alan
Deere & Company
Rivell John A.
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