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United States Patent | 3,562,427 |
Yano , et al. | February 9, 1971 |
A rotation control device having two pulleys, at least one of which is a conical pulley, mounted on a driving shaft rotating at a constant speed and a driven shaft to be driven in a fixed relation with the phase of a reference signal, and a torque-transmitting belt trained around the pulleys. In the device, a signal representing the phase difference between the reference signal and a signal detected in synchronism with the phase of rotation of the driven shaft is utilized to impart a brake torque to the driven shaft for varying the engaging position between the belt and the conical pulley to thereby ensure rotation of the driven shaft at a predetermined number of rotations.
Inventors: | Yano; Osahiko (Osaka, JA), Mihara; Keiziro (Osaka, JA), Yabu; Toshiomi (Sakai-shi, JA), Imanishi; Kaoru (Osaka, JA) |
Assignee: |
Matsushita Electric Industrial Co. Ltd.
(Osaka,
JA)
|
Appl. No.: | 04/682,083 |
Filed: | November 13, 1967 |
Nov 17, 1966 [JA] | 41/76,000 | |||
Current U.S. Class: | 360/70 ; 360/84; 474/70; 474/900 |
Current International Class: | H02P 29/00 (20060101); F16h 007/08 (); G11b 015/50 () |
Field of Search: | 178/6.6A 74/217CV,242.8,242.9 179/1.ZT 192/No Search/ Recommended/ 318/31NoSearchRecommended |
6868 | November 1849 | Finlay |
2898772 | August 1959 | Campbell |
2941409 | June 1960 | Witt |
3168618 | February 1965 | Sondermeyer |
3429992 | February 1969 | Prochnow |
3431353 | March 1969 | Kihara et al. |
548,675 | Mar., 1922 | FR | |||