DE425343C - Rotary switch with lever contact under spring pressure - Google Patents

Description

GERMAN EMPIRE

ISSUED FEBRUARY 18, 1926

REICH PATENT OFFICE

PATENT LETTERING

- JVl 425343 - CLASS 21c GROUP 29

(E32102 VIIIJ2IC *)

Company Elektrotechnische Metallwarenfabrik Storch & Stehmann G.m.b.H.

in peace.

Rotary switch with lever contact under spring pressure. Patented in the German Empire on February 24, 1925.

With the previously used rotary switch

tern springs made of brass or bronze sheet are used to form contacts, which screwed or riveted to the contact socket. Since these springs because of the

limited space in a switch can only have short spring legs it easily and the contact formation is interrupted. Furthermore, these springs can only be made from weak sheet metal, there

otherwise no spring force is achieved; but this has the disadvantage, '-. that due to the spark formation when switching and the resulting heat, the thin springs give way and fail and thus interruptions occur.

In the known switches with one-armed rigid levers, the suspension is directly behind the contact-forming parts of the lever, ίο which has the disadvantage that the coil spring is directly exposed to the heating caused by spark formation on the contact surface. Another The disadvantage of the known one-armed levers is that the effect of the The coil spring only affects the contact surface, but not the pivot point of the lever or the connection point, which can result in these points Spark formation occurs.

The above invention now shows a new arrangement for making contact by means of a double-armed resilient lever, as can be seen from the drawing. The lever «, which represents the contact spring, can be made of any material of any thickness. This lever has its fulcrum around the socket sec, which it encloses tightly in a semicircle, and thus, through the opposing action of the helical spring, makes intimate contact with the connection socket. One lever arm engages in the notches of the ratchet wheel d, which makes contact with the ratchet wheel. The helical spring δ presses against the opposite lever arm of the lever a . The spring & causes the lever α to make intimate contact with the socket C at its fulcrum and at its end the notches of the

Fig. 1.

Ratchet wheel d sets in, which in turn creates intimate contact with ratchet wheel d . Because the lever making the contact can be made of any material of any thickness, heating, even when overloaded, is avoided. The suspension cannot decrease even if it is overloaded, since the spring causing the contact, depending on the size of the switch, is located 20 or more millimeters from the contact surface (cf. b to d) and any heat generation has no effect on it can. This increases the durability and durability significantly.

The contact pressure caused by the lever δ can now be adjusted as required depending on the required stress on the switch by inserting a stronger or weaker spring b or by lengthening one or the other lever arm, thus giving the switch any desired Adapt requirements and also use them for higher amperages, which increases the purpose of a switch quite significantly.

Claims (1)

Patent claim: Rotary switch with lever contact under spring pressure, characterized in that that around the connection socket (c) is a two-armed lever (ä), which with one lever arm makes contact with the shift drum, while against the other "lever arm" a helical spring pushes, whereby a permanent intimate contact with the socket is made. Fig. 2. Fig. 3. Fig. 4.