G - Physics – 11 – B
Patent
G - Physics
11
B
352/10.2, 352/21
G11B 15/46 (2006.01) A61B 5/0436 (2006.01) G11B 25/06 (2006.01)
Patent
CA 1134031
ABSTRACT OF THE DISCLOSURE An improved control is provided for the tape transport motor of a battery-powered, slow-speed tape recorder typically used for producing magnetic recordings of an ambulatory patient. The recorder's tape transport means is driven by a synchronous AC motor powered from a DC (battery) supply. That DC supply, during normal operation, is voltage regulated to provide desired speed stability. That DC supply is inverted into a square wave DC current in a manner effectively providing a regulated square wave AC at twice the regulated DC voltage. Phase-shifting means connected to the inverter provide a phase-shifted square wave source necessary for the two-phase AC synchronous motor. In an improved mode of control, means are additionally provided for selectively supplying current at full battery voltage, square wave inverted and phase-shifted to the AC synchronous motor in lieu of the regulated supply voltage to provide high torque operation for selected periods of time as during "start-up" or "warm-up".
337965
Banks David E.
Dokus Edwin A.
Macrae & Co.
Warner-Lambert Company
LandOfFree
Slow speed tape recorder does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Slow speed tape recorder, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Slow speed tape recorder will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-447438