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:
Oct. 16, 1984
Filed:
Feb. 28, 1983
Applicant:
Inventor:
Ernst Zangerle, St. Gallen, CH;
Assignee:
Spuhl AG, St. Gallen, CH;
Primary Examiner:
Int. Cl.
CPC ...
B21C / ; B21F / ; B21F / ;
U.S. Cl.
CPC ...
72 15 ; 72 34 ; 72137 ; 72138 ; 140103 ;
Abstract
A machine for producing spiral springs whose ends are twisted around the adjacent coils includes inductive proximity switches 18, 19 for sensing the position of the wire end 3a of each spring 3 conveyed from a coil forming station A. The measurement results are fed to a preselector counter 21, and when deviations from the correct wire length exceed a certain predetermined number a regulating motor 23 adjusts a tool which determines the coil diameter of the spring.