Proportional controller

Details Proportional controller Proportional controller

1978-06-15

1981-03-17

Love, John J.

Railways

Track layers

Trail rail mounted rail anchor applicator

104 1R, 307115, 338 2, E01B 2924

Patent

active

042560403

ABSTRACT:
In a railroad spike driving machine, the spike driving mechanism is centered over a spike by a system which provides simultaneous proportional control over both the vertical and horizontal positions of the spike driver. The driver is mounted on a carriage whose position is adjustable according to signals derived from the deflection of a control arm. Strain gauges mounted on the control arm sense the push or pull of the operator to adjust the carriage position. The speed of the drive stroke of the hydraulic spike driver is governed by a proportional control valve which is in turn controlled by a signal generated from a trigger switch on the control arm.

REFERENCES:
patent: 3454920 (1969-07-01), Mehr
patent: 3692157 (1972-09-01), Arnold et al.
patent: 3717101 (1973-02-01), Katcha et al.
patent: 3832895 (1974-09-01), Strandh

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