A clutch (3) which can be engaged and released by a controllable clutch drive (11) is arranged in the torque transmission path between an engine (1) and a gear transmission (5) of a motor vehicle. By means of a control switch (15) the clutch (3) is released whereby the vehicle can coast free-wheeling, saving fuel, with the engine (1) working in idling rate. On actuation of a brake pedal (15) a control circuit (13) engages the clutch (3) and at the same time shuts off the fuel supply to the engin...

A cassette tape tensioning device for a cassette tape apparatus or wherein a cassette is placed within a cassette holder which is movable between a first position for receiving the cassette and a second position, with a pair of reel shafts being arranged to engage a pair of reel hubs in the cassette holder when the holder is in the second position and with a transmitting mechanism operating to transmit movement of the holder to at least one of the reel shafts when the holder moves from the first...

In the disclosed portable computer, a keyboard with keys for entering at least a full alphabet and ten digits is coupled to a computer system that includes a central processing unit which is in turn coupled to a display arrangement with a liquid crystal display. The entire computer is mounted in a case composed of a base and a cover hinged to the base. The base houses the computer system and the keyboard, and exposes the keyboard for operation by a user when the cover is open, while the cover ho...

For releasably joining two structural components (1,2), particularly plate-shaped structural components which extend at a right angle relative to one another, a fitting has a preferably cylindrical locking element which can be inserted either directly in a bore (4) in the first structural component (1) or it can be inserted indirectly in a housing, and a holding piece (5) with a holding projection (7) anchored in the second structural component (2). In the assembled position, the holding project...

Disclosed is a method of detecting the focusing condition of an image forming optical system to an object, in which two images of the object are formed with respective light beams from the prescribed exit pupil areas lying in almost symmetry to each other with respect to the optical axis of the optical system and are sensed to obtain an equal number of picture element data for each of the images, and based on the thus-obtained picture element data, while sequential shifting for the first image i...

Apparatus for driving an open-ended pipe 7, which has a driving shoe 6 at its leading end, through the ground comprises a driving member 2, 3 to which percussive driving forces are applied by a driving mechanism. Instead of fitting the part 3 of the driving member directly into the rear end of the pipe 7 as is usual an intermediate component 8 is interposed between the pipe and the part 3. The component 8 has soil outlet openings 10 and a deflector 16 to allow soil which enters the pipe 7 throug...

A device for driving nails, staples and similar fastening elements includes an electromotor for rotating a driving member. The rotation of the driving member is transferred to a driven member which, in turn, converts the rotational movement into translational movement. The rotational movement from the driving member to the driven member is effected for a limited time period by a clutch so that a drive stroke and a return stroke are carried out. A releasing device actuates the clutch.

A coupling assembly including a lock latchable in the unlocked position particularly for connecting a universal shaft with a power takeoff shaft in agricultural implements, wherein a coupling sleeve on the universal shaft may be slipped into torque transmitting engagement onto a power takeoff shaft and held in the locked position by locking members engaging within an annular groove of the power takeoff shaft. A lock ring holds the locking members in the locked position and when it is desired to ...

A needle package from a panel with needle pockets adjacent to each other and clamping webs protruding into the pockets comprising a withdrawal cavity extending transversely to the pockets and slit pocket walls in the area of the clamping webs.

A display device for a display in a camera. Within a view finder thereof in particular are arranged illuminating light emitting elements to illuminate a display member which is provided with a plurality of photography mode display marks. A segment light emitting element displays a computed value of photography information obtained from photography information computing apparatus.