DE1867967U - Bimetal thermostat for signaling circuits of limit temperatures, especially for motor vehicles. - Google Patents

Description

P.Ä.82Ö 641 * 22.12.62

Note: Societa per Azioni 5 ¹ RATELLI BORLETII, Milan / Italy

Bimetal thermostat for signaling circuits of G-r en ζ temperatures, in particular for motor vehicles

(Priority of the Italian application I. 5694 of February 24, 1962)

The present innovation relates to a thermal contact with bimetal blades for signaling circuits of limit temperatures, As used e.g. for motor vehicles, to indicate the driver by lighting up a lamp To indicate that the cooling water or lubricating oil has reached dangerous temperatures. So the lamp is in an electric one Circuit switched, which is closed by the thermal contact, whose housing into the water or the oil is immersed or is intimately connected to the engine body.

This contact generally consists of a bimetallic plate, which bends at a given temperature and closes the electrical circuit. If the If the temperature falls below the set value, the contact opens. Generally the leaflet bends gradually and there is an adjustment control for each contact to take into account the fact that the leaflets different characteristic values in a fairly wide range

21. Oez. 1962

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can have. This also applies to the leaflets, which suddenly close the contact. The arrangement and implementation the fuse obviously increases the cost of this thermal contact.

The! Thermostat according to the present! Inflation avoids these inconveniences thanks to the use of a bimetal sheet, which is more similar to that from a large series production Leaflet was selected and its characteristic values for the thermal deformation are within specified limits keep. Experience has shown that this way you get the best results if you follow the innovation uses a disc-shaped bimetal flake, which was previously curved and is arranged in a cylindrical cavity of a metal body which is connected to the means in Contact is made whose temperature you want to control. Its hollow side is against an insulated contact, e.g. Turned metal button, which is arranged in the axis of this cavity at a certain distance from the bimetal sheet is. As soon as the leaf reaches the specified temperature, it suddenly changes its curvature and comes with the switching contact in contact to close the electrical signaling circuit.

The metallic body is preferably connected to ground, while one end of the signaling circuit is connected to the metallic contact ends and the other end of the same must obviously also be connected to earth.

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The "attached drawing shows in an axial section a preferred embodiment of the thermal contact, which is given as an example only, and to which the following description refers.

According to this embodiment, the thermal contact has a metallic body 1, which with a threaded connector 2 is provided, which is inserted into a conduit of the cooling water of the engine when the message of the limit temperature of the ITassers or screwed into the engine body if you want the engine temperature to be reported.

In the cylindrical cavity 3 of the body 1, in metallic contact with a seat 4, a curved, disc-shaped bimetal sheet 5 is arranged, which is held in place by a ring β inserted into the cavity. On the axis of the cavity 3, the switching contact is arranged, which in turn is carried by an insulating ring 8, in the central bore of which a connecting piece 7 'is pressed. The nozzle 7 ^! is riveted in Fig. 9 to a metal bracket 10 which is connected to the conductor of the electrical circuit. The insulating ring 8 is held in place by a peripheral rivet 11 on the body 1; between this and the circular surface 12 of the ring 8, a disk 13 made of insulating material is placed, which has a considerable mechanical resistance.

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Claims (2)

P.A. 820 641 * 12/22/62 health protection claims 1. Bimetal thermostat for signaling circuits ύοώ limit temperatures, especially for Xraftfahrsenge, characterized in that that the Bimetair leaves from a large series production similar leaflets is selected ", the parameters the thermal ropes Poririänäeruiig imiernall) given limits lie. 2. Thermostat naoh claim 1, dadurcla gelieniizeicfenet that a previously curved scheiToenform-miges pear-shaped pearlescent material is arranged in a cylindrical cavity of a metal body, which is in contact with the agent, the temperature of which one wishes to control, where "bsi it with its hollow side is directed against an isolated contact, üqt in the axis of the run:! cavity is arranged at a certain distance from the leaf in such a way that "when a specified temperature is swept, the leaf suddenly changes its curvature and comes into contact with the contact that closes the electric üeldestroi & fcreis.