B - Operations – Transporting – 65 – G
Patent
B - Operations, Transporting
65
G
341/48
B65G 43/00 (2006.01) B66B 25/00 (2006.01) H02P 29/00 (2006.01)
Patent
CA 1263166
ABSTRACT OF THE DISCLOSURE A transportation apparatus having improved brake control. The actual speed of the transportation apparatus is compared with a reference speed signal, and when the actual speed exceeds the reference speed a brake is ap- plied to slow the transportation apparatus. Rather than simply applying the full torque of the brake abruptly, the present invention discloses means for pulse duration modulating the control signal for controlling the brake. The brake responds to the average of the pulse duration modulated control signal such that braking torque is applied gradually and essentially linearly. The device can also be used in an acceleration situation to provide gradual acceleration of the transportation apparatus.
479964
Johnson Fredrick Owen
Kruper Andrew Paul
Maiden Charles William
Wolf Joachim Erwin
Ag Inventio
Oldham And Company
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