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:
Jul. 29, 1980
Filed:
May. 03, 1978
Walter E Hinds, Beverly Hills, CA (US);
Other;
Abstract
A linear stepping motor comprising a stator having a central passageway extending therethrough and a secondary in the form of an elongated cylindrical member disposed within the passageway. The stator is formed of a plurality of coil groups, each group including at least one hollow coil disposed between a pair of magnetic stator plates. The coil groups are disposed co-axially, with immediately adjacent groups separated by respective hollow non-magnetic spacer. The secondary includes a plurality of annular rings of magnetic material disposed at equally spaced locations along the secondary. The coil groups are sequentially pulsed by electrical energy to effect the stepwise movement of the secondary along the passageway. In one embodiment the secondary is a magnetic material rod having a plurality of peripheral grooves cut at equally spaced locations therealong, with the portions of the rod between the grooves forming the annular rings. In another embodiment the secondary is in the form of a hollow tube having a fixed rod-like insert therein. The tube is formed of portions of magnetic and non-magnetic material, with the annular rings being formed of magnetic material. The insert is formed of magnetic and non-magnetic material sections, with the magnetic sections being disposed opposite to the coil groups of the stator. Means are provided for locking the secondary at any predetermined output position.