Equipment and method for measuring convergence

Details Equipment and method for measuring convergence Equipment and method for measuring convergence

1988-11-16

1990-04-03

Novosad, Stephen J.

Mining or in situ disintegration of hard material

Processes

Mine safety

33 1H, 73784, 405302, E21D 1540, G08B 2100

Patent

active

049134990

ABSTRACT:
A transducer is placed in a telescopic strut and connected to a roof cam and a floor cam. The cams are pivoted to a roof support and a constant load is applied to the cams by a gas spring. As convergence takes place a transducer in the telescopic strut records the relative movement between the floor and roof and transmits this as an electrical signal for analysis.

REFERENCES:
patent: 1737514 (1929-11-01), Nikolish
patent: 3341843 (1967-09-01), Wolsh
patent: 3594773 (1971-07-01), Conkle
patent: 3672174 (1972-06-01), Von Hippel
patent: 4514905 (1985-05-01), Lutzens

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