Abstract: A safety gate monitoring module is configured to monitor a state of a safety gate. A base device includes an actuator receptacle configured to receive an actuator and generates the safety gate signal in response to the actuator being inserted into the actuator receptacle. The base device includes a first interface, an axis, and a first end face arranged transversely to the axis. A mounting bracket includes a second interface configured to be coupled to the first interface of the base device in a first position, a second position rotated clockwise by 90° with respect to the first position, and a third position rotated clockwise by 90° with respect to the second position. The first and second interfaces include a mechanical blocking device that prevents coupling of the first and second interfaces in a fourth position rotated clockwise by 90° with respect to the third position.

Abstract: A lighted, rotatable display device for presenting advertising or other information is disclosed which includes a hollow transparent member supported for rotation on a drive motor. The drive motor includes a shaft extending into the hollow member and a light bulb is mounted on the shaft. Light from the light bulb makes information on the surface of the hollow member visible as the hollow member rotates.