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:
Aug. 14, 1990
Filed:
Apr. 12, 1989
Royden C Sanders, Jr, Wilton, NH (US);
John L Forsyth, So. Lyndeborough, NH (US);
John P Conant, Milford, NH (US);
Other;
Abstract
In a serial printer wherein a bi-directionally operating motor with a shaft drives a carriage in an oscillatory motion between two end points, an improvement for minimizing the time for direction reversal of the carriage. There is a ballistic rebound device for transferring energy of the moving motor and carriage in one direction into a resilient member and for retransmitting energy absorbed by the resilient member back into the motor and carriage in a direction opposite the one direction. There is also an electrically operated clutch for selectively coupling the ballistic rebound device to the shaft of the motor. Sensing apparatus is provided for sensing the position of the carriage with respect to the two ends. Finally, logic connected to the sensing device is provided for removing a drive voltage from the motor and connecting the ballistic rebound device to the motor shaft at points with respect to the end points which will cause the carriage to stop motion in one direction at a desired position with respect to the end points and for applying a drive voltage to the motor and disconnecting the ballistic rebound device from the motor shaft at points with respect to the end points which will cause the carriage to stop and accelerate to a maximum velocity in a direction opposite the one direction in a minimum amount of time.