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:
Dec. 11, 1990
Filed:
May. 19, 1989
Satoru Ishikawa, Tokyo, JP;
Toshitaka Toyomi, Tokyo, JP;
Janome Sewing Machine Company Limited, Tokyo, JP;
Abstract
A sewing machine having a wireless controller is disclosed, wherein the sewing machine substantially comprising a drive motor for driving the sewing machine, a separate controller adjustably operated to produce a variable set voltage for controlling the rotation speed of the drive motor, a converter for converting the set voltage to a corresponding digital value and producing a series of data on the basis of the digital value, a device for producing carrier waves, modulator for modulating the series of data by way of the carrier waves and producing modulated waves, transmitter means responsive to the modulated waves to produce a corresponding light signal, means for receiving the light signal, demodulator for demodulating the received light signal, and a device responsive to the demodulated light to control the rotation speed of said drive motor.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile