The invention relates to a reversing aid for supporting the driver of a motor vehicle, particularly when parking, comprising at least one transmitter (12), arranged at the rear end region (10) of the motor vehicle, for emitting measuring beams (14) into the rear danger zone, at least one receiver (16, 16a, 16b), arranged at the rear end region (10) of the motor vehicle, for receiving beams (20) reflected at at least one detected object (18), a distance-measuring device for determining the distan...

A reversing alarm for a vehicle emits an audible signal in the form of pulses of broad band sound when the vehicle is put into reverse gear. The broad band sound allows persons in the vicinity to locate the vehicle, as the human brain is able to process broad band sound to pinpoint the location of the sound source in a way which is not possible with single tone sounds. The alarm is implemented via a simple electronic circuit which uses a zener diode as a signal generator 20 to generate the broad...

A shaft is provided with a low speed oscillating progressive drive by means of hydraulic cylinders which operate a lever mechanism which may be clutched to and declutched from, the shaft. A pneumatic control system senses the position of the pistons of the hydraulic cylinders and provides a controlled oscillation of the cylinders. When the pistons cause the shaft to rotate in one direction a sensor causes the lever mechanism to be declutched from the shaft after a selectable number of degrees of...

In a reversing switch comprising a substantially V-shaped swinging contact plate provided with a normally open movable contact and a normally closed movable contact, a pair of fixed contacts provided in opposed relationship to the normally open movable contact and the normally closed movable contact, an intermediate supporting member for supporting a normally open contact side of a central bent portion of the swinging contact plate, and a knob adapted to be swung and slid on the swinging contact...

A ratchet is provided in which directional indexing is achieved by rotation of an indexing member in the rotational direction in which it is desired to rotate a workpiece. Locking in an indexing position is achieved by means of detent mechanisms situated in a channel extending through a guide element and biased radially outward therefrom to interact with said indexing member. A pawl is provided within a cavity defined between a guide element extending from a torque transmitting member and an enc...

A reversing valve for use in air conditioning systems and the like for controlling the flow of fluid between a plurality of ports, the valve including a valve body with a chamber communicating with each of the ports, and a valve member mounted in the chamber for movement between two positions to control the flow. Means for moving the valve member are located to one side and generally centrally of the valve member, and include a reciprocable operating plunger engaging a grooved ramp in the valve ...

In accordance with the present invention, there is provided an electric reversing switch comprising an insulated base having an elongated cavity defined therein. An elongated insulation member is provided for oscillatory motion about an axis through the cavity through an angular interval between a first and second position. Conductive bridging elements are provided on the ends of the insulation member and biased outwardly from the insulation member along the axis thereof. A first pair comprising...

An improved air reversing valve, as for use with a pneumatic scaler, chisel or the like, comprising throttling means between the two sides of the valve disc whereby the tool's performance characteristics are generally improved. Additionally, the valve is made multi-element whereby its manufacture is simplified, as by powdered metal casting internal passageways in facing surfaces of adjacent parts, rather than cross drilling or the like.

A reversing valve assembly for controlling the flow of fluid in a dual line type of system. The assembly has a spring biased toggle mechanism of improved design to prevent centering of a piston such as the pilot piston in a reversing valve or the like. The toggle mechanism includes a slider block mounted intermediate the opposed valving ends of a reciprocating pilot piston. The slider block has a surface slidably retained on a slipper plate and a generally V shaped groove diametrically opposed t...

A tubular member surrounds and is pin connected to a support shaft and has a cam profile on its surface that coacts with a roller mounted to a first sleeve around the tubular member. A second sleeve, around the shaft and spaced from the first sleeve, is resiliently biased toward the first sleeve; cooperating elements on the sleeves interconnect the sleeves when the cam roller engages the cam profile. A drive sheave is fixed to the first sleeve and a driven sheave is fixed to the second sleeve.