Bimetal Temperature Switch

room thermostat

BACKGROUND OF THE INVENTION

The present invention relates to the wall type room thermostats of the type comprising a bimetallic element, which activates a switch electrically and arranged so that heat generated by the passage of current through the switch is carried by the airflow between the switch and bimetal basis. Floor heating thermostat of the type mentioned type generally include a frame panels that can be easily attached to a junction box outlet in the wall of a room, for example. The framework is a switch supported on one side and a bimetallic supported on the opposite side. The bimetallic strip and the switch are interconnected so that movement of the bimetal in response to changes in temperature activate the switch. Usually, means are provided to vary the spatial relationship with the bimetal switch to vary the temperature range at which the switch is actuated by the bimetal. Because of the tiny movements involved between the switch and, with tolerances of parts of bimetallic digital thermostat are needed and give rise to relatively expensive construction. An example of the type of room thermostat wall in question is disclosed in U.S. Pat. No. 3,454,919.

The invention

The present invention relates to a room thermostat of the type mentioned which can be easily assembled with a minimum of parts and still provide an accurate and highly sustainable business thermostat. The invention provides for the provision of a panel frame type can be constructed from a single molded member formed so that one end of the bimetallic element can be shaped to nest into two spaced support pillars attached to the chassis and the opposite end of the bimetal has an impact not engage eccentric on the chassis, the bimetal being kept in engagement with the abutments and the cam by a spring force exerted by the switch activating the switch set framework, the force being transmitted by a bar or a link bimetallic engage at a point in a triangular area described by the parties commitment bimetallic two pillars of support and the connection point of the bimetal with the cam . The switching mechanism includes a housing attached to the panel by urging the clamps housing parts to form stop surfaces secured to the frame member and the same mold as the two pillars engaged by the bimetal for accurate spacing of the bimetal and switch is provided with a minimum of attention to these dimensions when making room thermostat.