Supports – Stand – To hold a particular article
Patent
1976-09-10
1978-04-11
Halvosa, George E. A.
Supports
Stand
To hold a particular article
188271, 188290, 308187, F16M 1112
Patent
active
040835243
ABSTRACT:
A panhead for mounting, panning and tilting instruments such as cameras, the panhead having an adjustable drag system accomplished by providing a pressurized compartment for each of the shafts for panning and tilting, each of the shafts being provided with a flange having pre-loaded roller bearings operating against both surfaces of the flange. The compartment is filled with extremely viscous fluid under pressure, operating against the force of a spring loaded piston within the tilting shaft, the pressure, and consequently the drag, being reducible from the pre-set pressure by an adjustment screw urging the piston against the force of its spring. The tilting shaft assembly is provided at the opposite end thereof with a crank coacting with a spring assembly to provide a counter-balancing moment to offset the moment due to the shift in the center of gravity of the instrument during tilting thereof, the spring force being adjustable to compensate for varying weights of different instruments.
REFERENCES:
patent: 1266310 (1918-05-01), Pfanstiehl
patent: 2111012 (1938-03-01), Tondreau
patent: 2125617 (1938-08-01), Niemann
patent: 2403397 (1946-07-01), Rankin
patent: 2775317 (1956-12-01), Sinisterra
patent: 3123330 (1964-03-01), Robinson
patent: 3180603 (1965-04-01), O'Connor
patent: 3303898 (1967-02-01), Bercaru
patent: 3877552 (1975-04-01), Higginson et al.
Halvosa George E. A.
Mesaros John G.
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