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:
Aug. 21, 1984
Filed:
Apr. 14, 1982
Albin Hassler, Schwieberdingen, DE;
Eckehart Friz, Stuttgart, DE;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
A Schmitt trigger circuit is caused to oscillate by a time-constant circuit including a reference inductor. The changing inductance of a variable inductor, for example, an inductive transducer for measuring mechanical movements, is switched into the same circuit, and the length of pulses resulting is measured in comparison with the stored value of the pulse length produced by the comparison inductor, which needs to be put in circuit only at longer intervals. With two Schmitt trigger circuits, one controlled by the comparison inductor and maintained in oscillation, while the other is controlled by the variable inductor and is triggered in synchronism with the oscillating Schmitt trigger, a pulse having a length representing the difference between the inductances of the comparison and variable inductors can be simply produced at frequent intervals. Several variable inductors can be continually measured with reference to a single comparison inductor.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile