Speed control device

Details Speed control device Speed control device

1974-10-24

1976-02-24

Knowles, Allen N.

Advancing material of indeterminate length

With material-responsive control means

To regulate longitudinal movement of material

226 45, 226111, 226118, 338158, B65H 2504

Patent

active

039400425

ABSTRACT:
A device for equalizing the speeds at which material moves through different sections of a machine which includes a tiltable structure sensitive to the depth of sag of the material passing from one section to another, a coil having a straight longitudinal axis is attached to the tiltable structure, and a spaced strip is disposed alongside the coil to provide a straight raceway containing a conductive ball, whereby tilting of the structure may allow gravity to move the ball along the raceway and so vary the impedance between the ball and one end of the coil. Another feature involves having multiple balls in the raceway, preferably of different diameter.

REFERENCES:
patent: 1988192 (1935-01-01), Drabin
patent: 3629748 (1971-12-01), Collier
patent: 3870215 (1975-03-01), Schiffer

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