DE395096C - Push button switch - Google Patents

Description

GERMAN EMPIRE

ISSUED MAY 13, 1924

REICH PATENT OFFICE

PATENT LETTERING

- JVi 395096 CLASS 21 c GROUP 30

(A 38468 Vlll \ aic *)

Manfred Auer in Stuttgart.

Push button switch. Patented in the German Empire on September 17, 1922.

The invention relates to a push button switch in which a double-armed Rocker arm is used, on whose arms a common push button alternately acts. The differs from the previously known switches of this type new ones due to particular simplicity, smallest number of moving parts, avoidance of Slideways and the like often cause malfunctions Facilities.

The subject of the invention is explained in more detail on the drawing.

Fig. Ι to 4 show a schematic diagram - There are four different positions for the new switch.

Fig. S is a vertical center section,

Fig. 6 a half middle section perpendicular to Fig. 5,

Fig. 7 is a plan for Fig. 5,

Fig. 8 is a section along line AB in Fig. 7.

In Fig. 5, α is a double-armed lever which is rotatably mounted in 0 and carries a pressure lever b or c on each arm. These

are in turn rotatably mounted on the lever α and always try to maintain an equal angle to the lever α due to the force of the springs d or c . In Fig. Ι to 4 this is 90 ⁰ . The power supply wires are connected to the screws k and /. When the lever α is in the position shown in Fig. 4, the current goes from k through the leaf spring g, through the lever α and through the contact spring m to /.

In the position of the lever α in Figs. 1 and 5, the free end of b now rests against the lower cylindrical part of the push button and transmits when it is pressed down for the first time

(Switching on) the movement of the push button on the lever a, so that it rotates through an angle, the center line of which is the horizontal, into the position shown schematically in Fig. 3. The ring-shaped groove or latch / on the push button causes the lever /> to be released only after the central position shown in Fig. 2 has been exceeded, in order to take up the angle determined by the spring d again. Now a tilting force constantly acts on the lever α, e.g. B. by means of the leaf spring g, which as a knee with the edge /; is formed and presses against the rounded edge {of the lever α. As a result of this force, the lever α rotates into one of the two rest positions shown in FIGS. 1 or 3 and 4 as soon as its rounded edge / slides over the edge h. From this moment on, further pressing down is no longer necessary, and if lever α is turned further and the push button is stopped, the pressure lever b is released. The contact part η grinds onto the contact spring m , which closes the circuit, and the free end of the pressure lever c rests against the conical surface p of the push button. As a result of this tilting force, the lever α naturally seeks to remain in the two rest positions shown in Figs. 1 and 5.

By the force of the spiral spring q , the released push button is brought back into the initial position, and the free end of c now comes to rest on the lower cylindrical part of the push button in front of the detent. When the push button is pressed down again, lever c now transfers the force to lever a, and this is turned back into the first position, which interrupts the circuit.

The transition from position 2 to position 1 or 4 takes place so quickly as a result of the tilting force (here as a result of the relaxation of the leaf spring g); that when the switch-off process occurs, the arc arising between the contact spring tn and the contact surface η is immediately cut off! is torn as required by momentary switches. The edge / * therefore also j has such a position that the contact of m with η is only canceled, ie the current is only interrupted when the edge i crosses the edge /; has slipped over.

With the shape of the lever α shown in Fig. 5 to 8, this dead center position does not coincide with its central position. As a result, you have to press longer when switching on than when switching off, from which you can tell the type of circuit by feeling.

This is only one embodiment. Many structural changes can be made in detail. For example, si old of the leaf spring are disposed α on the pull coil spring about the fulcrum of the lever g, a W ^r ippe, or it could be the axis 0 of the lever are used α to rotate those lever by means of a correspondingly constructed and arranged handle. Furthermore, the same principle can be applied to a pull switch. Instead of the snap on the push button, a mere detachment can be sufficient, since the friction prevents the free ends of the pressure levers from jumping off prematurely when the button is pressed.

Claims (2)

Patent Claims: 1. Push-button switch, in which two pressure pieces in connection with the moving part of the switch, which are forced into a certain angle to its longitudinal axis by a straightening force, alternately step into the path of an organ moving in the same way (push-button) and thereby cause the switchover, characterized in that the pressure pieces (b, c) are mounted at fixed points on the movable switch part, which is designed in a known manner as a two-armed lever, on both sides of the lever axis of rotation. 2. Push-button or pull switch according to claim 1, characterized in that the dead center position of the lever (a), from which this is suddenly changed over by a tilting force acting in a known manner, does not coincide with its central position, so that when you enter and Switch off must press for different lengths of time. 1 sheet of drawings.