Abstract: A temperature-dependent switch (10) to close or open an electric circuit depending on the temperature of a bimetallic part (26) comprises an electrically conductive housing (12) with an underside (13). An electrically conductive cover (16) is provided to close the housing (12). There is an insulating disk (17) between the housing (12) and the cover (16) which electrically isolates the housing (12) from the cover (16). The housing (12) contains a switching device (15) which makes or breaks an electric contact between the housing (12) and the cover (16) depending on the temperature of the bimetallic part (26), whereby the electric circuit can be connected on the one hand to the cover (16) and on the other to the housing (12).

Abstract: An easily and preferably fully automatically manufacturable thermal switch having a minimum number of parts is disclosed. The thermal switch has two connecting parts fixed to a support part. One connecting part carries a fixed contact and the other connecting part is connected through a high resistance to a movable contact switchable by a bimetallic element. The support part is a ceramic part forming the high resistance from a PTC material and the connecting parts are almost completely frictionally engage support part.

Abstract: For the manufacture of finished, self-stabilizing resistors, i.e. provided with leads, having PTC elements as the active parts, as well as such resistors, particularly on coil windings, such as those of electric motors, the invention provides a method according to which on a metallic carrier strip contact and top surfaces for the PTC elements are punched, a PTC element is placed and fixed to each contact surface, the top surface is bent over the PTC element, the contact and top surfaces are provided with leads and the top and contact surfaces are separated from the remaining carrier strip.

Abstract: A coil carrier with a receptacle for a safety switch is proposed, which has an electrically conductive mounting part (17) for the safety switch (6) with a recess (21) for the frictionally engaging reception of the safety switch (6).

Abstract: In order to improve the handling of a temperature switch, particularly for the use and contacting thereof on a printed circuit board, the invention provides a temperature switch, such as in particular a thermostat for an electric motor with a bimetallic switch mechanism in a casing, in which the latter is provided with a shoulder having undercuts and that connecting contacts are arranged adjacent to the shoulder.

Abstract: A temperature switching device for an electrotechnical part to be protected against an excess temperature due to a fault, with a first bimetallic switch and an ohmic resistor connected in parallel thereto, so that, after opening the bimetallic switch as a result of an excess temperature, the flow of current takes place across the ohmic resistor, which produces heat and as a result the bimetallic switch is kept open even in the case of the cooling of the excess temperature initially triggering the switching process due to a malfunction of the electrotechnical part to be protected, as a result of the evolution of heat of the ohmic resistor. At least the ohmic resistor is connected in series with a further automatically resettable thermal switch having an opening temperature above that of the first thermal switch, but well below temperatures causing irreversible damage to bimetallic elements and the two thermal switches being in close thermal contact.

Abstract: An insulating casing for enclosing a thermal switch, with the insulating casing having a plastic envelope, in which at least one oxide ceramic part is arranged on one side of the thermal switch, between the latter and the envelope.

Abstract: A temperature-sensitive switch with a casing having a pot-like lower part and a top part, whereby in the lower part is provided a bimetallic disk and under the action of the latter at least one movable contact part can be connected to a stationary opposite contact, so that it is possible to produce an electrical connection between the lower part, movable contact part and opposite contact part. Between the contact part and the lower part there is a fixed, electrically high-value connection provided by a resistor element, so that the temperature-sensitive switch does not automatically close again after opening unless a master switch is interrupted for the power supply.

Abstract: For stopping drift or other undesired changes in the response temperatures of a thermal switch using a bimetallic element for driving a moving contact, the design is such that the moving contact and a counter-contact are supported on a common insulating supporting part and the counter-contact is elastically and yieldingly fixed on the supporting part. The lengths of the bimetallic element and of the a strip supporting the counter-contact that may be moved are different to each other so that the two contacts will make contact at different points thereon and with a rubbing effect for clearing oxide and other undesired coatings forming on the said contacts.For producing such a thermal switch with multiple functions, for example the functions of a temperature automatic controller and a thermal protective device, the counter-contact, that is placed so that it may give way elastically, is acted upon by a further bimetallic element.

Abstract: Known thermal switches designed for safeguarding apparatus against overheating have been produced with one driving bimetal snap action disk and a spring snap action disk responsible for the contacting force on the turned-on position of the switch. For operation of the switch the bimetal snap action disks have to be powerful enough for overcoming the full contact-making pressure of the spring snap action disk and to this end it is necessary for the bimetal disk to be made quite large in size or the contact-making forces produced thereby will be so low that the conduction and switching properties are poor.For taking care of this shortcoming of the prior art in the invention a thermal switch has two formed spring snap action disks acting in opposite directions. This makes possible the use of small bimetal snap action disks which nevertheless give high contact-making forces and troublefree operation of such a thermal switch.

Abstract: A coil form for accommodating at least one coil winding and a heat switch. The coil form includes a recess for receiving the heat switch and the heat switch includes at least one switching element and a housing, at least a portion of which is adapted to be inserted into the recess. The housing is open at least in an area thereof adapted to be inserted into the recess and a portion of the housing serves for closing off the recess. The heat switch includes a base body and fixed connection elements on the base body which are insulated from each other. The heat switch includes a contact actuatable by a bimetallic switching member and a stationary counter contact with the contact and counter contacts being connected so as to be electrically conductive with the respective fixed connection elements at a predetermined temperature such that they are either electrically connected with each other by the bimetallic member or separated from each other.

Abstract: A heat switch which includes a base body having electrical connection elements fixed thereon and insulated from each other, a movable contact member, a fixed contact member, and a bimetallic member for controlling relative positions of the contact members with respect to each other. Each of the contact members is connected with a respective one of the electrical connection elements in an electrically conductive manner. The bimetallic member is operable for conductively connecting or separating the contact members from each other. The movable contact member is relatively resistant to bending and is connected by an electrically conducting articulated connection with one of the electrical connection elements. The articulated connection includes an articulation part formed on one of the connection elements and a movable articulation part formed on the movable contact member.

Abstract: A heat operated protective switch, with a housing, with a bimetallic snap disc guided peripherally in the housing, with a contact adapted to be operated by the bimetallic snap disc, and also with an associated contact. The contact and the associated contact are connected in electrically conductive manner to one another by way of contact surfaces in a low temperature position while when a predetermined temperature is exceeded the bimetallic snap disc snaps over into a high temperature position and lifts the contact away from the associated contact. The contact has a circumferential edge whereby its contact surface coming into contact with the associated contact is set off sharply from the bimetallic disc. Thus operationally caused impairment of the switch-over behavior of the bimetallic snap disc, more particularly impairment caused by switching sparking is obviated.

Abstract: An electric temperature protection switch is provided which has at least two encapsulated contacts in a housing and a current transmission member controlled by a temperature sensing bimetal snap plate. A manual push button device, biased by the force of a reset spring is provided for switching the released switch on again. The switch includes a first bistable snap element directly connected with the transmission member for holding the same in the respective on and off positions. A switch plunger is disposed at a distance from the current transmission member corresponding maximally to the switching stroke of the push button and guided slidably on the switch housing. A second snap element cooperates with the switch plunger and the push button device, which second snap element is moved into a passive position from an active position as the result of actuation of the manual device at critical temperatures, whereby switching of the transmission member from the off to the on position takes place.