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:
Apr. 26, 1988
Filed:
Sep. 23, 1987
Koyu Maenaka, Matsuto, JP;
Tsudakoma Corp., Kanazawa, JP;
Abstract
A weft yarn storing device having a rotary yarn guide for winding a weft yarn on a measuring and storing drum, a motor for driving said rotary yarn guide for rotation, which comprises a controller. The controller comprises a frequency pattern generator which generates, upon the reception of a start signal, a control frequency signal of a control frequency pattern having a creep of a low frequency in a deceleration period in which the motor is decelerated; a voltage pattern generator which generates a control voltage signal corresponding to the frequency of the control frequency signal; a pulse width modulating unit which generates a pulse width modulated signal on the basis of the control frequency signal and the control voltage signal; and a driver which applies a DC voltage intermittently to the motor according to the output signal of the PWM unit.