The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 05, 1977
Filed:
Mar. 18, 1976
Norbert Miller, Stuttgart, DT;
Peter Jurgen Schmidt, Schwieberdingen, DT;
Bernd Przybyla, Schwieberdingen, DT;
Robert Bosch GmbH, Stuttgart, DT;
Abstract
An oscillator is connected to a backward counter to set the backward counter to a count number representative of its frequency of oscillation, the backward counter being stepped down by clock pulses recurring at a frequency high with respect to the cycling rate of the oscillator until it reaches a reference value, for example zero. The difference between the reference value and the count state of the counter when a predetermined counting period has elapsed, as determined by the duration of one cycle of the input signal, forms an error signal which is transmitted over a bi-directional counter to an integrator which, in turn, controls the oscillator. The system is particularly applicable for use in connection with vehicle wheel brake anti-lock arrangements, and permits determination of wheel speed by oscillation of the oscillator as well as acceleration and deceleration by sensing the error signal.