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:
Mar. 23, 1976
Filed:
Jun. 06, 1974
Hansjuergen van de Loo, Langen-Neurott, DT;
Acme-Cleveland Corporation, Cleveland, OH (US);
Abstract
A rotatable shaft positioning mechanism is disclosed for use with a multiple spindle automatic machine tool having a plurality of rotatable spindles in an indexable spindle carrier. A Hall effect sensor is actuated by a permanent magnet rotating with each spindle to develop a reference signal which starts a counter counting pulse generated by a pulse generator connected to the output of a stepping motor. The stepping motor is connected to rotate the spindle and when the counter counts out, the spindle is stopped at the preset position. The spindle is held in place and the machine tool may be operated for performing a machining function on a workpiece held in the spindle, for example, a cross drilling attachment, cross-tapping attachment or alternatively, the spindle may be rotated at a slow speed by the stepping motor to perform a contouring or assembling operation on a workpiece in the spindle. The foregoing abstract is merely a resume of one general application, is not a complete discussion of all principles of operation or applications, and is not to be construed as a limitation on the scope of the claimed subject matter.