Resumes
Resumes
Tilak Sahni Phones & Addresses
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Spring, TX
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Conroe, TX
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Canton, MI
Publications
Us Patents
Spring Tester
View pageUS Patent:
41570332, Jun 5, 1979
Filed:
Sep 12, 1977
Appl. No.:
5/832736
Inventors:
Daniel J. Shereda - Redford MI
Tilak R. Sahni - Plymouth MI
Tilak R. Sahni - Plymouth MI
Assignee:
Link Engineering Company - Detroit MI
International Classification:
G01L 104
US Classification:
73161
Abstract:
Disclosed is an improved device for testing the compression, tension, or spring rate of a spring or other resilient material. The device is adapted to automatically display the load reading of a spring at a preselected height by merely compressing the spring past the check point. Alternatively, additional displays may be provided so that load readings at different height settings can be displayed with a single compression of the spring through all of the check points. In addition, the rate of a spring can be readily determined by setting two check points a unit distance apart and utilizing the load reading from the first check point to establish the reference level of the meter. The spring tester includes an electronic control circuit comprising a plurality of sample and hold circuits and a corresponding plurality of thumbwheel comparators. The comparators are connected to a height indicator and each is adapted to provide an output signal when the height of the spring corresponds to the preset height of the comparator. Each sample and hold circuit is connected to the load cell and to one of the comparators and is adapted to provide an output signal that follows the force reading from the load cell until the output signal from its respective comparator is received.