摘要:
A thermostat uses a bimetal plate carried by a rotating knob. Adjustment of the knob to select the thermostat's temperature setting displaces the entire bimetal plate towards or away from the electrical switch being activated. The bimetal plate is contained between protrusions from the knob and the coupling to the electrical switch.
摘要:
An electric coffee maker having a hot water heater, a resettable thermostat, a mechanism for resetting the thermostat, and an electrical switch connected in series with the thermostat. The resetting mechanism has a user actuated button movably mounted to a housing of the coffee maker and a lever connected to the button. The lever moves a plunger of the thermostat when the button is moved by a user. The switch has an actuator located under a portion of the button that is moved by the button, to open the switch, when the button is moved towards a thermostat reset position.
摘要:
A thermostat having an electrically insulating housing and a push button extending therein through a bottom wall thereof. Two normally closed contacts, one fixed and the other on a movable carrier with a projection are disposed within the housing. A spring member pivotable about its center portion has an end resting against the push button and an opposite end resting against the movable contact carrier. An electrically insulating sheet is disposed over an open end of the housing with a convex outwardly bimetallic disc over and external to the insulating sheet and a cap disposed over the disc to enclose the disc within the housing. In an alarm status, the disc becomes convex inwardly and pushes against the projection on the movable contact carrier to separate the contacts. To reset, the push button is moved toward the disc and rotates the spring member about its pivot, thereby resetting the disc and pushing the end portion of the spring member against the carrier of the movable contact to maintain the contacts open. The contacts remain open until the push button is released to allow the spring member to rotate away from the carrier for the movable contact and allow the contacts to close, the disc now being in the non-alarm state. In any position of the disc, the spring member holds the contacts open if the pushbutton is pushed in sufficiently to interfere with the normal operation of the disc and contacts.
摘要:
A trip-free mechanism for resetting an on-off unit, such as a thermostat (1), breakable by the tripping of an actuator element (3) from a first condition to a second condition comprises a resetting button (9) engageable to apply a resetting force to the actuator element (3) to reset the latter in its first condition, and a restraining lever (10) acted upon by the resetting button (9) when it applies the resetting force to the actuator element (3) to maintain the unit in its broken condition until the button (9) is disengaged upon resetting of the actuator element.
摘要:
A thermally-sensible overcurrent protective relay comprising a toggle mechanism operable in connection with the bending operation of a bimetal bendable in response to current flowing through a main circuit a normally-open contact having a normally-open fixed contact element and a normally-open movable contact element both formed by a resilient conductive thin plate having a contact portion at one end thereof a normally-closed contact having a normally-closed fixed contact element and a normally-closed movable contact element both formed by a resilient conductive thin plate having a contact portion at one end thereof, and a mechanism adapted to be selected to an automatic resetting position and a manual resetting position in such a manner as to contact one surface of the contact portion of the normally-open fixed contact element at one end of a changeover lever pivotally rotatable to displace the normally-open fixed contact element toward the normally-open movable contact element and retain the normally-open contact in two positions at the other end of the changeover lever; wherein the normally-closed contact and the normally-open contact are interlockingly operated by the operation of the toggle mechanism.
摘要:
In a push button actuated, bimetal controlled, current overload switch capable of undergoing trip-free release and including a bimetal strip disposed in a housing, an angular contact bridge disposed in the housing and forming part of the current path provided by the switch, a switching rod mounted in the housing for axial movement relative thereto and having one end extending out of the housing, a switching rod extension mounted at the other end of the rod and within the housing and arranged to bear against the bridge, and a spring disposed to maintain a spring force between the bridge and the extension, opening of the switch by actuation of the rod is made possible by the provision of an obliquely extending lever disposed in the housing, having one end pivotally secured to the housing, having its other end engaging the bimetal strip, and located in the path of travel of the extension during axial movement of the rod into the housing for enabling such movement of the rod to displace the lever in a direction to change the switch from a switched-on state to a switched-off state.
摘要:
A trip free miniature thermostatic switch having a bimetallic disc located therein is responsive to temperature for localized control of an electrical circuit. A reset mechanism in said switch provides for closing of the circuit therein, but only after the temperature has returned the bimetallic disc to the switch closed position. For example, a bimetallic member may move a switch component to the open position where it is releasably retained until the temperature change has reversed and the release mechanism is positively operated.
摘要:
The housing of this thermostat contains a normally closed switch arm, and a bimetallic, temperature-responsive disc, which flexes to open the switch arm and interrupt the associated circuit when the ambient temperature exceeds a predetermined value. An indicator pin, which is mounted to reciprocate in an opening in one end of the housing, may be attached at its inner end to an over-center, snap-acting spring which is mounted in the housing, or the pin may carry a flexible spring member engageable in spaced recesses in the housing. When the metal disc opens the switch arm, the arm shifts the indicator pin outwardly to indicating position against the resistance of the over-center spring, or the flexible spring member, where it is readily viewable. The indicator pin must be manually reset, but the switch are reclosed independently of the indicator pin.
摘要:
A double pole thermostat is disclosed in which two switches are mounted in separate switch cavities separated by insulating material so that arc splatter cannot produce a conductive path between the switches. The switches are sequentially operated by a bimetallic snap disc with a first bumper extending between one switch and the disc, and a second bumper extending between the two switches. The second bumper provides lost motion to insure sequential operation of the switches and to insure that unequal contact wear will not result in one switch blocking the other switch open.