Ordinate detention switch
The ordinate sticky switch (OHS) is an electromechanical switching element in analogue telephone exchange technology and is used to switch through the speech wires in an electromechanical telephone system or in apron systems. Well-known uses of these switches are electromechanical dialing systems such as 48OHS in Austria , the dial star device 63 (Germany) and the dial star device 4/20 (Germany). It is not used in the digital switching centers that have been in operation since the 1980s .
The ordinate sticky switch was developed by the Telefunken company.
technology
The ordinate sticky switch is a coupling element for telephone technology. Electromechanical switching elements that are activated by an electronic control must be able to switch through quickly and have a low power consumption. These requirements are met by the OHS. Another advantage of the OHS is that it does not require any electricity when it is idle, even if the contacts are switched through. The OHS is a type of multiple relay with 12 coupling points and a common reset arrangement. Each coupling point can accommodate and operate up to nine working contacts, depending on the equipment.
construction
The OHS is made up of two plastic side parts and two connecting plates, with the reset system forming a unit with the housing.
The side parts are provided with guide rails into which up to nine contact units can be inserted. Each contact unit consists of twelve contact springs, which are embedded in a plastic bar, as well as a contact rail common to all twelve contacts. In the mechanical idle state (= electrical working state, contacts switched through), the contacts are on this by a given mechanical prestress. Next to the contact units is the core plate, which is designed like a comb and accommodates twelve coupling coils. A permanent magnet is located between the core plate and the yoke plate.