Indication means for indicating suitable conditions for the tran

Details Indication means for indicating suitable conditions for the tran Indication means for indicating suitable conditions for the tran

1977-02-25

1978-10-17

Gruber, Felix D.

Boots, shoes, and leggings

254173R, 340529, 340685, 361242, B66C 1506

Patent

active

041212932

ABSTRACT:
For use with apparatus for transferring a load between two stations movable relative to each other in a vertical plane by means of a crane carried by one of the two stations having a hook assembly for attachment to the load on the other station for lifting the load, a lift-off indicator measures either the relative velocity or relative vertical accelerations of the two stations and from signals representing relative velocity of approach showing values between a maximum positive and a negative, and relative acceleration acting away from the direction of approach indicates conditions suitable for initiating lifting.

REFERENCES:
patent: 2946943 (1960-07-01), Nye et al.
patent: 3168680 (1965-02-01), Morris
patent: 3594557 (1971-07-01), Anderson
patent: 3921818 (1975-11-01), Yamagishi

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