Spacing safety mechanism for operation microscopes with electrom

Details Spacing safety mechanism for operation microscopes with electrom Spacing safety mechanism for operation microscopes with electrom

1983-07-22

1985-07-30

Henry, Jon W.

Electricity: motive power systems

Motor-reversing

Armature or primary circuit control

350507, 318460, G02B 2100, G05B 902

Patent

active

045318166

ABSTRACT:
A spacing safety mechanism for operation microscopes with electromotive stands is described, in which ultrasonic transmitter and an ultrasonic receiver are arranged in the vicinity of the operation microscope. When the travel time of the ultrasonic signals reflected by the body of the patient is less than a predeterminable value, the voltage supply of the motor for the downward movement of the operation microscope is interrupted.

REFERENCES:
patent: 3809454 (1974-05-01), Brambring
patent: 4125826 (1978-11-01), Rasmussen et al.

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