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:
Feb. 25, 1992
Filed:
Jun. 26, 1990
John H Wall, Columbia City, IN (US);
Edward L Walter, Columbia City, IN (US);
Dana Corporation, Toledo, OH (US);
Abstract
An apparatus for passing an electrical current through an electromagnetic coil to perform a resistance bonding operation is disclosed. The apparatus includes a pair of pistons which are selectively moved to clamp the leads of the coil to respective electrical terminals. The terminals are selectively connected through a switch to a source of electrical power to perform the resistance bonding operation. A pivotable cover is provided for covering the entire apparatus during the resistance bonding operation. When the cover is closed by an operator, a logic controller automatically actuates the pistons to clamp the leads of the coil to the terminals. Additional limit switches sense when the pistons have been so moved and, in response thereto, automatically close the switch to connect the electrical power supply to the terminals, thereby commencing the resistance bonding operation. The cover may be lined with a shielding material to prevent the operator from being exposed to the electromagnetic field generated by the coil during the resistance bonding operation.