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:
Nov. 01, 1988
Filed:
Aug. 11, 1987
R Lent Crevling, Jr, Williamsport, PA (US);
Rudolph W Wacek, Montoursville, PA (US);
Shop-Vac Corporation, Williamsport, PA (US);
Abstract
Each brush of a wound rotor type electric motor is mounted in a conducting formed-metal tube having an integral tab that is provided with a narrow slit having an enlarged mouth. The latter faces the commutator that is carried by the wound rotor and, as the tube and its assembled brush are moved radially inward to their operating positions, initially receives one end of magnet wire that forms a stator winding. As the stator winding and its associated field stack are moved into operative position with respect to other elements of the stator an indexing formation of the stator positions the wire end for engagement with the tab of the tube. With the tube in its operating position, the wire end is disposed within the narrow slit and is clamped between the tab jaws that are on opposite sides of the slit. During the relative movement between the tube and wire end, the jaw edges cut through the thin coating of insulation on the wire end and the wire end is slightly deformed by the jaws to form a reliable electrical connection directly between the tab and the wire.