A holding device for receiving switching elements for a command and alert device, with a first housing portion in which a recess for receiving an actuator of a command and alert device is arranged, and with a second housing portion arranged on the first housing portion and which continues the recess of the first housing portion, where guide rails for guiding transmission elements are formed in the housing portions, and where the transmission elements transmit an actuation of the actuator to a switching element.

A fastening device for an electric control and/or indicator member, which includes a base, a fastening clamp fitted pivotably on the base about a first axis, the clamp including at least one branch having a free end designed to form at least a first bearing point against a wall, an element hinged about a second axis and interacting with the clamp to cause it to pivot about the first axis, a clamping screw for controlling the pivoting of the clamp, the clamp being configured in such a way that a first plane including the first axis and the second axis and a second plane including the first axis and the first bearing point form an angle of between 110 and 160.

A monitoring system for an optical display element of an emergency stop switch, wherein the monitoring system comprises an operating element with optical display element, an optical sensor and safety electronics. The safety electronics are connected to the optical display element and the optical sensor. The safety electronics comprise a safe output and a safe input and are connected to the optical display element via the safe output and are connected to the optical sensor via the safe input. It can thereby be ensured that the optical display element functions reliably or is not faulty in order to avoid fatal consequences for life and limb. The optical display element can comprise a single display element or a plurality of display elements.

A switch device structure includes an assembly of a main body and an operation body. An electrical connection module and an elastic unit are mounted on the main body. The contact arm of the electrical connection module has a first member and/or a second member with variable arrangement position. According to the position or motion of the operation body, the elastic unit provides an elastic force to push the contact arm of the electrical connection module into a contacting circuit closed state or make the elastic unit separate from the contact arm to form a circuit open state. The arrangement form of the first member and/or the second member of the contact arm of the electrical connection module is variable in accordance with the specification of the switch to achieve NO mode and NC mode.

Aspects of methods and systems for transceiver array synchronization are provided. An array based communications system comprises a plurality of transceiver circuits and an array coordinator. Each transceiver circuit of the plurality of transceiver circuits comprises a plurality of wireless transmitters and a local oscillator generator. Each wireless transmitter of the plurality of wireless transmitters is able to modulate a local oscillator signal from the local oscillator generator based on a weighted sum of a plurality of digital datastreams. The array coordinator is able to adjust a phase of a first local oscillator signal based on a phase difference between the first local oscillator signal and a second local oscillator signal. The first local oscillator signal is generated by a first local oscillator generator of a first transceiver circuit. The second local oscillator signal is generated by a second local oscillator generator of a second transceiver circuit.

An operating mechanism for a toggle switch handle includes a bar that is movably mounted along its longitudinal axis, and a roller head mounted at one end of the bar. The roller head includes two axes for rolls. The first roll of the rolls is provided for turning on the toggle switch handle depending on a movement of the bar, and a second roll of the rolls is provided for rolling over a plate and blocking a rotation of the bar around its longitudinal axis.

Provided is a switch that can be downsized. A switch is provided with a plunger, two upper torsion springs that bias the plunger in a returning direction, housing-side contacts, and plunger-side contacts. One of the upper torsion springs is arranged on one side of a plane that includes an axis passing through a central portion of the plunger, and that is perpendicular to perpendicular lines M connecting the plunger-side contacts and the axis, and the other one of the upper torsion springs is arranged on the other side of the plane.

An emergency stop device including a control button, an actuation assembly which includes an actuation plunger that cooperates with the control button and an actuation spring mounted between the body of the device and the actuation plunger, a trip plunger designed to cooperate with at least one electrical contact unit and one trip spring mounted between the actuation plunger and the trip plunger and arranged to actuate the trip plunger when the control button is actuated from its rest position to its actuated position, a latching member mounted on the trip plunger, an unlocking assembly including an unlocking ring that is arranged to cooperate with the control button to return it from its released actuated position to the rest position, the unlocking assembly including an unlocking spring mounted between the control button and the body, and arranged to actuate the control button towards its rest position.

To enable a safe monitoring with a small cabling effort of a modular safety relay circuit, a modular safety relay circuit for the safe control of at least one machine is provided comprising a safety relay unit that has at least one forcibly guided relay for the safe switching on and off of the machine and that generates output signals in dependence on input signals, wherein the input signals are provided by at least one connected signal transmitter and the output signals are communicated to the at least one machine; and at least one expansion relay unit for providing additional output connectors so that additional machines can be connected; wherein the expansion relay unit has at least one respective forcibly guided relay for the safe switching on and off of the machine and is monitored by means of a monitoring relay.

The teaching equipment of an electromechanical system provided by the present invention is used to connect an emergency stop loop of electromechanical equipment, including a multi-stage key switch, an enabling switch and a safety control device. The multi-stage key switch is used to switch between a first mode and a second mode. The multi-stage key switch generates a switching signal during switching. The enabling switch is connected to the emergency stop loop. The safety control device is used to receive the switching signal. The safety control device includes a transient emergency stop circuit and a disconnection loop time. The safety control device triggers the emergency stop loop to enter the emergency stop state according to the switching signal. The emergency stop state includes that the transient emergency stop circuit interrupts the emergency stop loop until the disconnection loop time is up.