Apparatus to indicate when a patient has evacuated a bed or demo

Details Apparatus to indicate when a patient has evacuated a bed or demo Apparatus to indicate when a patient has evacuated a bed or demo

1978-10-10

1981-10-13

Swann, III, Glen R.

Communications: electrical

Condition responsive indicating system

Specific condition

340575, 340636, 340666, 340667, G08B 2100

Patent

active

042951330

ABSTRACT:
A switch placed in a bed under a patient comprises two spaced parallel strips of insulating material carrying contact means therebetween. When the strips are straight the switch is closed, and when the strips are bent into an arc the switch is open. The closing of the switch starts an electrical oscillator, which activates a counter, and at a selected count a latch is set to actuate an alarm.

REFERENCES:
patent: Re28754 (1976-03-01), Cook et al.
patent: 3594751 (1971-07-01), Ogden et al.
patent: 3982238 (1976-09-01), Byers
Electronic Engineer, May, 1970, p. 55, Fig. 10.
Dean, J. A. et al., "Astable and Monostable Oscillators Using RCA COS/MOS Digital Integrated Circuits", Digital Integrated Circuits, RCA, 1971.

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