Physiological sensing unit
First Claim
1. A physiological, electrically heated thermostatically controlled sensing unit, comprising:
- a housing;
a sensing element supported within the housing for application to the skin of a living being;
an electric heater element located within the housing;
first temperature-responsive switch means located in the housing and adapted for coupling to a control circuit remote from the sensing unit for maintaining the sensing unit at a preselected temperature level in conjunction with said heater element;
a second switch for interrupting energization of the electric heater element;
temperature-responsive control circuit means contained in the housing for operating the second switch to interrupt energization of the electric heater element if the temperature of the sensing unit exceeds the pre-selected temperature level to reach a predetermined threshold value;
power supply means for the control circuit means;
power supply means for the electric heater element; and
means for coupling the sensing element to monitoring equipment.
2 Assignments
0 Petitions
Accused Products
Abstract
Disclosed herein is a physiological, electrically heated, thermostatically controlled sensing unit of the type used in the medical field for measuring blood contents, such as oxygen. A typical unit comprises a housing for application to the skin of a living being, an electric heater element within the housing, and a temperature-responsive switching circuit, also accommodated within the housing. The switching circuit automatically disconnects a power supply to the heater element when the skin temperature exceeds an adjustable predetermined threshold level. The power supply for the switching circuit is directly connected to the power supply for the heater element within the housing.
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Citations
12 Claims
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1. A physiological, electrically heated thermostatically controlled sensing unit, comprising:
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a housing; a sensing element supported within the housing for application to the skin of a living being; an electric heater element located within the housing; first temperature-responsive switch means located in the housing and adapted for coupling to a control circuit remote from the sensing unit for maintaining the sensing unit at a preselected temperature level in conjunction with said heater element; a second switch for interrupting energization of the electric heater element; temperature-responsive control circuit means contained in the housing for operating the second switch to interrupt energization of the electric heater element if the temperature of the sensing unit exceeds the pre-selected temperature level to reach a predetermined threshold value; power supply means for the control circuit means; power supply means for the electric heater element; and means for coupling the sensing element to monitoring equipment. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification