A compact and lightweight emulator is provided for parasitic testing individual lighting circuits and the electric brake circuit of travel trailers and fifth-wheel trailers, which are equipped with an on-board rechargeable battery. The emulator is equipped with a flasher circuit that, when activated, flashes the stop/turn lights on the trailer simultaneously in an emergency flasher mode. The emulator includes a housing, which incorporates a 7-blade receptacle for a trailer electrical plug, a digital voltmeter, a circuit selector switch, a keyed ON-OFF switch, which selectively sends power from the trailer battery to device circuitry, and a pair of external terminals, which can be connected to leads from an electrical charger in order to recharge the trailer's on-board battery.

A transducer device including: a base platform; an annular support member mounted on a surface of the base platform, the annular support member having a first opening positioned adjacent the surface of the base platform and a second opening positioned away from the surface of the base platform along a rotation axis; an inner shaft mounted relative to the base platform and configured to extend away from the second opening of the annular support member and rotate relative to the annular support member about the rotation axis; an inner shaft detent mechanism located at least partially within the annular support member configured for releasably securing the inner shaft in a plurality of rotational positions corresponding to each of a plurality of detent positions of the inner shaft detent mechanism as the inner shaft is rotated about the rotation axis; an outer shaft including a passage extending along an elongate axis thereof configured for receiving the inner shaft therein so that the inner shaft and outer shaft are arranged to rotate concentrically relative to each other about the rotation axis, the outer shaft further including a flanged portion configured for seating upon an outer surface of the annular support member; a PCB unit disposed on the surface of the base platform comprising: a first transducer circuit unit operably coupled to the inner shaft and responsive to rotational movement of the inner shaft about the rotation axis so that the first transducer circuit unit outputs a first electrical signal that is indicative of a rotational position of the inner shaft about the rotational axis; a second transducer circuit unit operably coupled to the outer shaft and responsive to rotational movement of the outer shaft about the rotation axis so that the second transducer circuit unit will output a second electrical signal that is indicative of a rotational position of the outer shaft about the rotational axis; a housing configured for enclosing the first and second transducer circuit units therein and having an opening disposed in a wall of the housing via which ends of the inner and outer shafts may extend outwardly of the housing along the rotation axis; and an outer shaft detent mechanism located between the outer shaft and an inner surface of the housing configured for releasably securing the outer shaft in a plurality of rotational positions corresponding to each of a plurality of detent positions of the outer shaft detent mechanism as the outer shaft is rotated about the rotation axis.

A transducer device including: a base platform; an annular support member mounted on a surface of the base platform, the annular support member having a first opening positioned adjacent the surface of the base platform and a second opening positioned away from the surface of the base platform along a rotation axis; an inner shaft mounted relative to the base platform and configured to extend away from the second opening of the annular support member and rotate relative to the annular support member about the rotation axis; an inner shaft detent mechanism located at least partially within the annular support member configured for releasably securing the inner shaft in a plurality of rotational positions corresponding to each of a plurality of detent positions of the inner shaft detent mechanism as the inner shaft is rotated about the rotation axis; an outer shaft including a passage extending along an elongate axis thereof configured for receiving the inner shaft therein so that the inner shaft and outer shaft are arranged to rotate concentrically relative to each other about the rotation axis, the outer shaft further including a flanged portion configured for seating upon an outer surface of the annular support member; a PCB unit disposed on the surface of the base platform comprising: a first transducer circuit unit operably coupled to the inner shaft and responsive to rotational movement of the inner shaft about the rotation axis so that the first transducer circuit unit outputs a first electrical signal that is indicative of a rotational position of the inner shaft about the rotational axis; a second transducer circuit unit operably coupled to the outer shaft and responsive to rotational movement of the outer shaft about the rotation axis so that the second transducer circuit unit will output a second electrical signal that is indicative of a rotational position of the outer shaft about the rotational axis; a housing configured for enclosing the first and second transducer circuit units therein and having an opening disposed in a wall of the housing via which ends of the inner and outer shafts may extend outwardly of the housing along the rotation axis; and an outer shaft detent mechanism located between the outer shaft and an inner surface of the housing configured for releasably securing the outer shaft in a plurality of rotational positions corresponding to each of a plurality of detent positions of the outer shaft detent mechanism as the outer shaft is rotated about the rotation axis.

A battery-powered control device may be configured to control an amount of power delivered to one or more electrical loads and provide various feedback associated with the control device and/or the electrical loads. The feedback may indicate a low battery condition and/or the amount of power delivered to the one or more electrical loads. The control device may include a light bar and/or one or more indicator lights for providing the feedback. The control device may operate in different modes including a normal mode and a low battery mode.

A battery-powered control device may be configured to control an amount of power delivered to one or more electrical loads and provide various feedback associated with the control device and/or the electrical loads. The feedback may indicate a low battery condition and/or the amount of power delivered to the one or more electrical loads. The control device may include a light bar and/or one or more indicator lights for providing the feedback. The control device may operate in different modes including a normal mode and a low battery mode.

A control device configured for use in a load control system to control an external electrical load may provide simple feedback regarding the operation of the control device. For example, the control device may comprise a base portion configured to be mounted to an electrical wallbox or over a mechanical switch, and a control unit connected to the base portion. The control unit may comprise a rotation portion rotatable with respect to the base portion, an actuation portion, and a light source. The control unit may be configured to control the light source to illuminate at least an illuminated portion of the actuation portion in response to actuations of the rotation portion and the actuation portion. In addition, the control unit may provide a limit indication on the illuminated portion by blinking the illuminated portion when the electrical load has reached a limit.

A control device configured for use in a load control system to control an external electrical load may provide simple feedback regarding the operation of the control device. For example, the control device may comprise a base portion configured to be mounted to an electrical wallbox or over a mechanical switch, and a control unit connected to the base portion. The control unit may comprise a rotation portion rotatable with respect to the base portion, an actuation portion, and a light source. The control unit may be configured to control the light source to illuminate at least an illuminated portion of the actuation portion in response to actuations of the rotation portion and the actuation portion. In addition, the control unit may provide a limit indication on the illuminated portion by blinking the illuminated portion when the electrical load has reached a limit.

A time switch of controllable time adjustment, including a switch housing, a control circuit board, an input terminal, an output terminal, a connecting piece, a first spring, a warped plate, and an electromagnet. The control circuit board is arranged inside the switch housing and electrically connected to the electromagnet and the output terminal. The control circuit board is configured to control the electromagnet to be powered on according to a turn-off time preset by the control circuit board. The first spring is provided between the warped plate and the connecting piece to enable the warped plate to sway around the rotating shaft and drive the connecting piece to sway. The connecting piece is configured to connect the input terminal and the output terminal. The swaying of the connecting piece causes the input terminal and the output terminal to complete closing and opening.

A time switch of controllable time adjustment, including a switch housing, a control circuit board, an input terminal, an output terminal, a connecting piece, a first spring, a warped plate, and an electromagnet. The control circuit board is arranged inside the switch housing and electrically connected to the electromagnet and the output terminal. The control circuit board is configured to control the electromagnet to be powered on according to a turn-off time preset by the control circuit board. The first spring is provided between the warped plate and the connecting piece to enable the warped plate to sway around the rotating shaft and drive the connecting piece to sway. The connecting piece is configured to connect the input terminal and the output terminal. The swaying of the connecting piece causes the input terminal and the output terminal to complete closing and opening.

The present invention provides a push-type rotary switch having display function, comprising: a bearing seat having a signal producing unit and an IR interruption sensing signal producing unit, and a first signal being produced when pressing the signal producing unit, when a space between the IR reception end and the IR emission end is not interrupted, the circuit base emits a second signal; a rotating seat rotatably setting on the bearing seat, the signal producing unit being optionally pressed on the rotating seat; a key cap covering with the rotating seat, when the key cap is pushed, the key cap further presses the rotating seat, when the key cap is forced to rotate, the rotating seat correspondingly rotates, and the space between the IR reception end and the IR emission end is optionally interrupted when the key cap rotates; and a display being correspondingly set under the transparent wall.