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:
Jan. 21, 1992
Filed:
Aug. 31, 1990
Applicant:
Inventor:
Thomas G Pettigrew, Greenville, SC (US);
Assignee:
Marshall and Williams Company, Providence, RI (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
D06C / ;
U.S. Cl.
CPC ...
26 91 ;
Abstract
Apparatus is illustrated for limiting the movement of tenter frame rails in order to avoid damage, particularly to chains, resulting from excessive movement which includes a spring biased plunger valve carried by the rail on one side of a rail junction, while the other side of the junction carries a member having a predetermined surface for actuating a switch when the member moves to an extreme position where it can no longer support the plunger against the resilient force of the spring, causing a switch to be activated to deactivate the motor imparting transverse movement to the rails.