DE1089093B - Rotary switch with setpoint adjuster for electrically heated, temperature-controlled devices - Google Patents

Description

GERMAN

The invention relates to a rotary switch with setpoint adjuster for electrically heated, temperature-controlled Devices, on whose shaft a switching cam for the switch-on and switch-off contact and a Control disk for setting the controller contact (connected in series) in relation to the temperature sensor are appropriate.

A temperature controller with a setpoint adjuster is already known, on whose axis of rotation except one Cam that controls a toggle switch connected to the circuit, another role with a sector-shaped recess is provided which cooperates with a contact arm, one on the Contact arm provided sector-shaped increase engages in the recess. The toggle switch and the Contacts actuated by the contact arm each work on a special circuit. The cam and the rollers are arranged on the axis of rotation so that the control device is in the "off" position both circuits are interrupted.

On the other hand, the present invention is characterized by the union of the following Characteristics:

1. The cam is via a preferably adjustable length pin with a spring arm non-positively connected, which sets the one contact piece of the controller contact.

2. The one designed as a role with a sector-shaped recess Switching cam sits with play on the shaft and lies against the hump-like elevation of the contact piece, which momentarily locks into the recess when it is switched off.

3. The switch-on and switch-off contact and the controller contact are each in a supply line, so that the The device is switched off on both poles with "Off" division.

A controller designed according to the invention enables an adjustment or in a simple manner an adjustment of the control range that is possible within certain limits. Furthermore, through the bipolar Shutdown of a heater meets the safety requirements placed on modern * o devices. the constructive training is made so that the coming according to the invention for use Roller actuated contact is switched abruptly, so that contact erosion and high frequency Disturbances are largely avoided.

An exemplary embodiment is described below with reference to the drawing.

The cam 2 is firmly attached to the axis 1. This acts via the adjustable intermediate member 3 on the spring arm 4, the one under action of the bimetallic strip 5 carries standing contact device. There is also play on axis 1 a roller 6 made of insulating material is attached, rotary switch with setpoint adjuster

for electrically heated,
temperature controlled devices

Applicant:

LICENTIA Patent-Verwaltungs-G.m.b.H., Frankfurt / M., Theodor-Stern-Kai 1

Hans Dohlus, Nuremberg,
has been named as the inventor

which is carried along by the axis when it rotates. For this purpose, axis 1 and the axis bore are used the roller 6 is flattened. At its periphery, the role is with a sector-shaped recess 7 provided, which appropriately has steep flanks. Below the roll is a resilient contact arm 8, which tries to bend counterclockwise around its clamping point. In the middle, this arm has a hump-shaped elevation 9 on which the roller 6 acts. At At its free end, the arm 8 carries a contact 10 which cooperates with a fixed counter-contact 11. The contact device described is connected to one connection via connection parts 12 and 13 the heating device 16 switched, the temperature of which is controlled by the controller via the controller contacts 14,15 that are in the other supply line.

In the working state of the switching device according to the invention, the roller 6 presses on the arm 8 in such a way that that the contacts 10 and 11 are closed. If the axis 1 is now rotated counter-clockwise, then finally reached a position in which the cam 2 controlled by the bimetal 5 Controlled system is switched off. The roller 6 is also rotated at the same time, namely until the elevation 9 can enter the recess 7 of the role. Since this according to a feature of the invention is placed on the axis 1 with a lot of play, it continues to rotate jerkily as soon as the elevation is reached 9 due to the spring action of the arm 8 on the steep flank of the recess 7 along on the Reason slides. Here the arm 8 also bends

009 607/318

jerks up, and in the same way you will! äüfeh * the Contacts 10 and 11 separated from each other.

After turning on the rotary switch, the cam track of the cam 2 acts via the adjustable intermediate member 3 on the switching device with the controller contacts 14,15, whereby the setpoint is set.

Claims (3)

Patent claim: 10 rotary switch with setpoint adjuster for electrically heated, temperature-controlled devices, on the shaft of which there is a switching cam for the on and off switch and a control disk for setting the (series-connected) controller contact in relation to the temperature sensor, characterized by the combination of the following features : 1. The cam (2) is preferably on a length-adjustable pin (3) connected to a spring arm (4) in a force-locking manner, which sets the one contact piece (14) of the regulating contact (14,15). 2. The switching cam, designed as a roller (6) with a sector-shaped recess (7), is seated with play on the shaft (1) and lies against the hump-like elevation of the contact piece (10) which momentarily locks into the recess when the shuttering is removed. 3. The on and off switch (10, 11) and the controller contact (14,15) are each in a supply line, so that the device is at "Off" division is switched off at both poles. III Consider drawn publications:
German patent specification No. 890 399. 1 sheet of drawings © 009 607/318 9.60