Limited rotation motor

Details Limited rotation motor Limited rotation motor

G - Physics

01

R

324/74

G01R 5/16 (2006.01) G01D 11/10 (2006.01) G01R 5/02 (2006.01) G01R 17/06 (2006.01)

Patent

CA 1109523

PIZZUTI, Everett V. GASKILL, David M. LIMITED ROTATION MOTOR Abstract of the Disclosure A recording device which utilizes a closed loop servo system including a limited rotation motor, i.e. a moving coil galvanometer wherein the moving coil is activated by an input signal such that the rotational movement of a shaft supporting such coil may be trans- lated into a graphic display for recording of the input signal. The device has specific utility in the recording of medical information wherein the input signal is created by the patient's body functions but has wide- spread alternate utility. The device further includes a transducer construction utilizing a rotational resistance mechanism including a rotating hub to which a contact arm is attached that creates a signal pro- portional to the position of the coil shaft and utilizes this signal for comparision with the input signal such that the coil position and thus that of the shaft may be corrected. Any mechanical or electrical vibration in the resistance element is prevented or reduced by the use of a viscous dampening material disposed between the hub and contact arm of the rotational resistance mechanism.

312587

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