Abstract: A bimetallic thermostat with exchange contact is described comprising an external support covering (1) and an internal device (2) made up of a pierced base (3) provided with a packing (4) and with electric contacts (5, 15, 25, 35) with the outside, of a relay (8) electrically connected with said base (3) and of a sensitive thermostatic element (9) electrically connected with said relay (8). Said thermostat comprises in addition a printed circuit (7) interposed between the sensing element (9) and the relay (8).

Abstract: A switch has a temperature-dependent switching mechanism with a stationary contact element; a movable contact element coacting with the stationary contact element; and a bimetallic element, having a predetermined functional service life, that as a function of its temperature lifts the movable contact element away from the stationary contact element, the two contact elements being, in one switch position, in contact with one another in order to carry a current that is to be guided through the switch, and in a second switch position, lifted away from one another so that the switch is open. The two contact elements are arranged and coordinated with one another in such a way that when the functional service life of the bimetallic element is reached, the switching mechanism is welded in the second switch position.

Abstract: An electric apparatus (10) according to the present invention comprises electrically separated first and second terminals (14, 13), a first contact (16) that is connected electrically to the first terminal (14) within a casing (11), a second contact (15) that is connected electrically to the second terminal (13) within the casing and an operating member (20) for moving the first and second contacts relative to one another. In the present invention, at least the first contact (16) comprises a first conductive layer (41) with a given thickness including a face that is engageable with the second contact, a second conductive layer (42) that is connected to the first terminal (14), and insulating fiber (43) that is interposed between the first and second layers so that the above-mentioned second contact is engaged in the closing contacts movement by the insulating fiber when it is exposed by wear of the first layer (41) due to opening and closing movements of above mentioned contacts.

Abstract: A switch comprises a housing which receives a temperature-dependent switching mechanism and has a lower part on whose inner base a first countercontact for the switching mechanism is arranged. Also provided is a cover part, closing off the lower part, on whose inner side a second countercontact for the switching mechanism is provided. The switching mechanism creates, as a function of its temperature, an electrically conductive connection between the two countercontacts, to which contact can be made from outside. The lower part is made of insulating material, and contact can be made from outside with the first countercontact through a wall of the lower part. The cover part is made of electrically conductive material and simultaneously acts as the second countercontact, the cover part being held on an upper rim of the lower part.

Abstract: An electrical switch assembly includes a snap action switch which is actuated from one to another conduction state by a snap action interface mechanism moved by an external actuation element between first and second corresponding positions. The snap action interface mechanism prevents the snap action switch from operating improperly when the external actuation element is of the type which provides a slowly moving, low actuation force. A preferred embodiment has as a part of the interface mechanism, a lever having a ferromagnetic portion which snaps between the first and second positions under the influence of at least one magnet. The switch assembly is particularly suitable for actuation by the bimetal coil strip which commonly forms the temperature responsive element in a thermostat.

Abstract: The present invention provides an improved thermostatic contact assembly for use in a protector and method of making wherein weld projections are formed on the thin snap-acting bimetal disc for attaching the movable contact member to provide better alignment and reliability for the contact assembly which is economical to produce.

Abstract: A thermostat device having a temperature responsive bimetal which permits movement of a permanent magnet between two fixed points to activate a reed switch element. The device includes a magnetic shunt for effecting a positive off position.

Abstract: A thermostatic switch has a bimetallic member formed with an undulated section for causing both an axial and a radial displacement of the bimetallic member such that each time the member expands a first contact wipes across a second contact. By providing sufficient undulations, the wiping action occurs prior to and after separation of the contacts preventing the build-up of a resistive residue which could interfere with switch operation. Utilizing the undulated bimetallic section in a thermostatic switch increases the life of the contacts and reduces variations in temperature responsiveness.

Abstract: A thermostat subbase has a conductive grid located on a first surface of an insulating base. Terminals for connection to the controlled heating and cooling apparatus and terminals for connection to a thermostat are integrally formed from the conductive grid. Manual switching is provided to connect adjoining grid portions. The adjoining grid portions extend over a pocket formed in the base and are shaped to receive a conductive ball.

Abstract: There is disclosed a thermostat controlled apparatus which controls the operation of a heating system and a cooling system in response to temperature variations in a given environment. The thermostat has a three-electrode mercury switch which is coupled to a single bimetallic element which rotates the switch in response to temperature variations. The switch has a housing containing a pool of mercury and three electrodes extending within. A common electrode is connected to a voltage source. A second electrode is connected to the cooling system. A third electrode is connected to the heating system. Tilting the switch clockwise causes the mercury to connect the second and common electrodes, thereby energizing the cooling system; tilting the switch counterclockwise causes the mercury to connect the third electrode and common electrode, thereby energizing the heating system.

Abstract: An electric switch, particularly a thermostatic switch, includes contacts connected to at least three terminal members having connector terminals aligned along a common axis.

Abstract: There is disclosed a thermostat controlled apparatus which operates to control operation of a heating system and a cooling system in response to the temperature detected in a given environment. The thermostat has a pair of mercury switches which are coupled to a single bimetallic element which switches are inclined, one with respect to the other. The circuit configuration is such that one switch controls the heating operation while the other switch controls a cooling operation. Heating and cooling occurs within a predetermined range which is adjustable by means of the angular positions of the switches with respect to the bimetallic coil. In this manner one switch will control the heating operation and the other switch controls the cooling operation. There is an area between the setting of the thermostat wherein neither switch operates but during this mode a separate fan is energized to provide air circulation for the given environment.

Abstract: A device for the control of room temperature in existing automobiles is placed in series with the driving circuit of the blower motor of the automobile. The temperature control device includes a bimetal or spiral bimetallic strip capable of setting a working temperature. The bimetal is used for the direct detection of the room temperature of the automobile. An insulating member is attached to a free end of the bimetal. The insulating member carries a first electrical contact, and a mating contact opposes the first contact. Respective lead wires are attached to each contact. A switch lever rotates the bimetal to set a desired temperature. A stopper is provided to hold the contacts together so that, regardless of the ambient temperature, the blower motor remains on, and the user can rely solely on the existing controls.

Abstract: A method of welding electrical contacts onto conductive bodies including engaging a surface of the contact with the conductive body and passing a welding current through a pair of spaced surface areas of the contact to provide weld action and wherein a rib portion between the pair of spaced areas retains unoxidized metal thereon to improve electrical contact properties of any article made and utilizing the contact and particularly the ribbed area thereof for make and break engagement with other members of an electric circuit.A new control article is also provided wherein a contact therein has a raised center rib thereon for contacting an associated means for make and break circuit action, which contact is made from silver or silver alloy and has uncontaminated silver on the surface of the rib or center area of the contact.

Abstract: There is disclosed a mercury switch for use in thermostat applications. The switch has a hollow housing fabricated from glass and is positioned in the horizontal plane when in an operating orientation. The switch has a first common electrode within said housing and extending parallel to the horizontal plane with a terminal end extending from the housing. Positioned above the first electrode is a second shorter electrode with a third longer electrode positioned above said second electrode said third electrode being longer than said second but shorter than said first. Positioned above the third electrode is a longer fourth electrode. Essentially, major portions of the electrodes within the housing are parallel to each other. A charge of mercury is in the housing and operates to make contact between the electrodes in four operating modes indicative of thermostat operation for control of a heat pump, furnace and air conditioner.

Abstract: A manually and automatically operable four-terminal zone thermostat for use with automatic damper means when thermostatic means are required to operate fuel control means of a heating/cooling device and motor means rotating said damper means. The thermostat has a four-terminal switch operable by a heat sensitive bimetal spring; said spring operating the switch to energize and deenergize said fuel control means and motor means in accordance with temperature requirements of environment which said thermostat monitors.