DE1279169B - Electric temperature switch - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY

GERMAN

PATENT OFFICE

EDITORIAL

Int. CL:

HOIh

German class: 21 c - 40/05

Number: 1279169

File number: P 12 79 169.4-34 (B 80795)

Filing date: March 3, 1965

Open date: October 3, 1968

The invention relates to an electrical temperature switch with several, preferably four, in parallel adjacent switching points that can be set independently of one another, if necessary, to different switching points, arranged in a common contact carrier pivotable snap contact springs, the are actuated by a common, pivotably mounted, not snapping rocker, which in turn is actuated against spring pressure by a temperature-sensitive expansion member, wherein the snap-in contact springs, which work independently of one another, are each on a first one Fixed contact piece are attached and on the other hand with further fixed contact pieces in the cooperate one or both tilt positions of each snap contact spring.

In a known device of the type described above, the one which actuates the snap contact springs Rocker mounted on special supports and with an additional compression spring with ao frictionally connected to the temperature-sensitive expansion member (German patent specification 1 046 921). It can here between the control point of the expansion member on the rocker and between their actuation point on the snap contact springs as a result of friction losses in the cutting edge bearing and as a result of the vibration sensitivity due to the very massive Design of the rocker very easily changes the actual switching temperature to the set target temperature appear. In addition, this device is very expensive.

The invention is intended to eliminate these deficiencies and provide a temperature switch which with a few individual parts a perfect function and compliance with the switching temperature depending on guaranteed by the set target temperature. This should also be achieved in particular If the temperature switch is built into devices, the significant vibrations and are exposed to fluctuations in temperature and humidity, as is the case with Washing machines is the case.

The invention consists in that the first stationary contact piece is provided with a flag which aligned in the longitudinal direction of the snap contact spring and with a notch for the cutting edge storage of a Pressure leg of the snap contact spring is provided and that the flag by means of a at the bottom of the Contact carrier arranged adjusting screw is adjustable against the tension of a spring, and that the snap contact springs to the corresponding electrical temperature switch

Applicant:

Busch-Jaeger Dürener Metallwerke

Corporation,

5880 Ludenscheid

Named as inventor:
Heinrich Stumpf, 5880 Heedfeld

Flags of the first stationary contact pieces parallel to the tongues with one to the expansion member pointing bias carry the common seesaw.

In the case of an electrical temperature-dependent snap switch with a three-leg snap contact spring Although it is known to the pressure leg of the flag provided with a notch To store snap contact spring (German Auslegeschrift 1000 093). However, this is the formation of a single snap contact spring controlled by a bimetal. An immediate one Transfer and use of this snap contact spring on the device according to the invention however, it is not possible.

After all, it is with an electric thermal switch Known with adjustable switching sequence of several contacts, individually adjustable contact arms by means of to adjust the bottom of the contact carrier penetrating screws (German Auslegeschrift 1183 162). This thermal switch, which is provided with a common contact plate, which is finger-shaped Contact tongues with several adjustable contact parts arranged separately from one another interact, can only be used for a connection of a common feed to several outlets. In addition, because of the slow contact opening movement, only small control currents can be used be switched.

The design according to the invention eliminates the disadvantages described and a temperature switch of small size, in which the rocker is insensitive to vibrations without additional springs is pressed positively against the expansion member. Furthermore there is here the possibility of having the snap contact springs electrically independent of each other or completely or partially

809 619/407

Claims (1)

3 4 wise summarized as multi-way switching elements to web is to use a lying between the tension legs 3a. Flap provided as a pressure leg 3 b , which expediently actuates the rocker with its free the angled end 2 & one of the first local edge of each snap contact spring directly behind the fixed contact piece 2 and formed in the longitudinal direction of the blade bearing. It is thereby the snap spring contact 3 between the contact springs of the snap Zugtätigung tion for loading 5 only a small shanks 3 lying α 2 α flag in a notch 2 c expansion stroke required. is mounted on the cutting edge. To set the target stamps of further training, the first stationary conformation is the flag la by means of an adjusting screw 6 penetrating the bottom of the contact piece for several snap contact springs on a contact carrier 1 formed in pieces with one or more anio adjustable, with the flag 2 a below the pressure circuit contacts and each with a flag for each of a spring 7 is available. The flag 2 a can also snap contact spring. As a result, the temperature can be self-resilient with a device switch away from the contact carrier 1 from a supply line to a multiple directional pressure force, so that the other, for example four outgoing lines as a multiple spring 7 can be dispensed with. Be used on the on the way switch, the switching points 15 first stationary contact piece 2 attached transverse web of the individual snap contact springs different from the snap contact spring 3 can be set parallel to. Flag 2 a of the first stationary contact piece 2 ge-The rocker made of metal is expediently provided tongue 3 c, on which the rocker 8 forms with one attached transversely to the tendon contact springs. The tongue 3 c, the ratio-oriented, U-shaped profile, one of which is 20 moderately short, is provided with a bias, the U-legs with an outwardly directed deflection, the rocker 8 against an angle in a contact carrier 1 the tongues is attached and the covering hood or cap 9 attached Ausanderer U-leg, which presses the free edge of the rocker expansion member 10 non-positively. That depicts, actuates the tendon contact springs. In the exemplary embodiment, the rocker can be made of thin material from an expansion member 10 in a cup in the bottom of the hood 9, so that due to the small accumulation of mass, a shaped indented depression is used in a pressure-tight manner and increased vibration resistance through the U-conveyor - Membrane 11, which with a pressure pin 12 on the moderate profile ensures a great lateral stability rocker 8 rests. For this purpose, the pressure pin 12 is on. its end is dome-shaped, which in a further embodiment, the flag itself - 3 ° corresponding depression 8 d of the rocker 8 engages. The expansion member 10 is formed by a compressive force, on the other hand, with a spring-loaded movement directed away from the contact carrier. This saves an additional capillary tube 13 with a temperature sensor 14 in a compression spring. Connection, this system being connected to a Finally, there are the stationary contacts and a warming-expanding liquid is filled. the expansion member carrying, preferably metal- 35 The rocker 8 has a U-shaped profile, Lische hood or cap on one in one plane with one U-arm 8 α with one to the outside mounting base lying on the contact carrier at the directional bend 8 c on the tongues 3 c and get the contact carrier from which is softened and the other U-leg 8 b the snap opposite side penetrating adjusting screw contact springs 3 actuated, ben with their screw heads in the same or 40 the contact pieces 2, 4 and 5, which from the inside through approximately the same plane to the stop. The bottom of the contact carrier 1 is plugged in by adjusting the set target switching length on this in a common plane A to the point as a result of the contact with thermal influences that have a common mounting base with shrinkage of the contact carrier from the support points of the hood or cap 9 closed on. 45 contact carrier 1 forms. The contact pieces 2, 4 and 5 are on the underside of the con-The temperature switch according to the invention is in the clock carrier 1, both drawings show an embodiment example as in FIG. 3 represented by upsetting represents. It shows or rivets attached and with a connection fig. 1 is a plan view of the contact carrier provided with contact 2 d. The adjustment hood 6 is with the hood or cap removed, 50 its screw head from the underside of the Kon-F ig. 2 shows a cross section through the switch and clock carrier 1 on this on a surface that is flat-F ί g. 3 shows a longitudinal section through the switch. if in the same or approximately the same plane A is on a contact made of insulating material. The hood or cap 9 is held with fastening support 1, a first stationary contact piece 2 is part 15 on the contact support 1,
solidifies, which carries a snap contact spring 3, which with 55 a contact arranged at its free end "claims:
rivet with further stationary contact pieces 4 and 5 interacts as a changeover switch. Instead of a 1st electrical temperature switch with several the stationary contact pieces 4 and 5 can also be a ren, preferably four parallel juxtaposed isolated stop can be provided, whereby the 60 areas, if necessary different switching Snap contact spring 3 as a simple on, off lever points that can be set independently of one another, in is effective. The snap contact spring 3 is essentially arranged on a common contact carrier borrowed frame-shaped with two parallel pivotable Sehnappkontaktfedern, which of lateral pull legs 3 a, which are pivotably mounted on their two of a common Ends are connected by crossbars, whereby the rocker 65 which does not snap is actuated, a transverse web on the first stationary contact - which in turn against spring pressure from a tem- piece2 is attached and the other crossbar actuates the temperature-sensitive expansion member Contact rivet wears. On the last-mentioned transverse, the work independently of one another tend snap contact springs are each attached on the one hand to a first stationary contact piece and on the other hand cooperate with a further stationary contact piece in one or both tilt positions of each snap contact spring, characterized in that the stationary contact piece (2) is provided with a flag (2 a), which in Aligned in the longitudinal direction of the snap contact spring (3) and provided with a notch (2 c) for the cutting edge mounting of an xo pressure leg (3 b) of the snap contact spring, and that the lug (2 a) by means of an adjusting screw (6) arranged on the bottom of the contact carrier (1) ) is adjustable against the tension of a spring (7) and that the snap contact springs to the corresponding lugs (2a) of the first stationary contact pieces (2) parallel tongues (3 c) with a prestress pointing towards the expansion member (10) carry the common rocker (8). ao 2. Temperature switch according to claim 1, characterized in that the rocker (8) with its free edge (8 b) each snap contact spring (3) actuated immediately behind their cutting edge bearing. 3. Temperature switch according to claims 1 and 2, characterized in that the first stationary contact piece (2) for several snap contact springs (3) is integrally formed with one or more connection contacts (2 d) and each with a flag (2 a) for each snap contact spring (3). 4. Temperature switch according to claim 3, characterized in that the rocker (8) is made of metal and with a to the snap contact springs (3) transversely directed, U-shaped profiling, one of which is U-leg (8 a) with one to the outside directed bend (8 c) is attached to the tongues (3 c) and the other U-leg (8 b), which represents the free edge of the rocker, actuates the snap contact spring (3). 5. Temperature switch according to one or more of claims 1 to 4, characterized in that that the flag (2a) is self-resilient with a pressure force directed away from the contact carrier (1) is trained. 6. Temperature switch according to one or more of claims 1 to 5, characterized in that the stationary contact pieces (2, 4, 5) and a preferably metallic hood or cap (9) carrying the expansion member (10) on a plane ( .4) lying mounting base on the contact carrier (1) and that the adjusting screws (6) penetrating the contact carrier from the opposite side reach the stop with their screw heads in the same or approximately the same plane (A). Considered publications:
German publication no.1000 093,
921.1183 162;
British Patent No. 679,475. 1 sheet of drawings 809 619/407 9.68 © Bundesdruckelei Berlin