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. 14, 1993
Filed:
Nov. 20, 1992
Atsuo Ohta, Saitama, JP;
Yoshiaki Hirakata, Tokyo, JP;
Honda Giken Kogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
A method for controlling the speed of rotation of a motor by changing the resistance value of a resistor circuit connected in series to the motor and having discontinuous resistance values, including the steps of applying voltage across the motor. Detecting when the applied voltage is lower than a first applied voltage and the resistance value of the resistor circuit is a first resistance value and changing the resistance value of the resistor circuit over to a second resistance value lower than the first resistance value. Detecting when the applied voltage detected is higher than a second applied voltage higher than the first applied voltage and the resistance value of the resistor value is the second resistance value and changing the resistance value of the resistor circuit over to the first resistance value. The first applied voltage and the second voltage are set for permitting the current flowing through the motor by the first applied voltage to be higher than the current flowing through the motor by the second applied voltage.