Inventors:
Mikhael S. Doueihi - Peoria IL
Kenneth W. Gay - East Peoria IL
Assignee:
Caterpillar Tractor Co. - Peoria IL
International Classification:
G01P 356
Abstract:
A speed sensing apparatus (10) counts a predetermined number of gear teeth (18) on a gear (16) driven by a motor (8). The duration of time required to count the predetermined number of gear teeth (18) is compared to a timing signal of preselected duration. The comparison is used to make a determination as to whether the velocity of the gear is above or below a preselected velocity.