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. 06, 1976
Filed:
Apr. 25, 1975
Edward F Burke, Jr, Reading, MA (US);
MFE Corporation, Salem, NH (US);
Abstract
An escapement mechanism for driving a shaft about an axis in a line printer each time a solenoid is actuated. An armature in the solenoid moves along a second axis which is normal to the axis of rotation and intersects it. An integrally molded escapement arm is pivotally mounted to the armature and also to a frame for rotation about a third axis which is parallel to the axis of shaft rotation and is spaced from the second axis. A resilient spring on the escapement arm engages a ratchet wheel mounted on a shaft. When the solenoid is actuated, the armature withdraws the escapement arm and the spring. When the solenoid is de-energized, a return spring on the solenoid advances the armature so the drive member engages the ratchet wheel and rotates the shaft. A second ratchet wheel oppositely oriented with respect to the first engages a positioning member on the escapement arm thereby to orient properly the shaft.