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. 20, 1993
Filed:
Jul. 01, 1992
David R McMurtry, Wotton-Under-Edge, GB;
Clifford W Archer, Dursley, GB;
Renishaw Metrology Limited, Gloucestershire, GB;
Abstract
A touch trigger probe for machine tools or coordinate measuring machines has three strain gauges 10A-C, which respond to deflection of a stylus of the probe when it contacts a workpiece. The signals from the strain gauges are each rectified by precision rectifiers 18A-C, and then combined at a summing junction 20. A first comparator 28 compares the combined signal with a threshold voltage V.sub.ref1, to produce a sensitive trigger signal. A second comparator 30 compares the combined signal with a higher threshold voltage V.sub.ref2, which produces a confirmation signal. This confirms that the trigger signal is caused by a genuine workpiece contact, and not caused falsely by vibration or acceleration.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile