Abstract: An automobile theft prevention device has an alarm circuit for intermittently energizing a horn, a sensor for detecting a monitored action; and a control unit for controlling the alarm circuit so as to intermittently energize the horn when the monitored action is detected by means of the sensor during a period of time after an automobile door is locked according to a predetermined procedure and until the automobile door is properly unlocked.

Abstract: A reclining angle adjustment device for a seat includes a shaft having a concentric portion and an eccentric portion and rotatable for adjusting the reclining angle of the seat, the eccentric portion comprising an axially movable tapered ring, a gear train including an external gear and an internal gear meshing with the internal gear, the internal gear having more teeth than the external gear, a first arm having one of the external and internal gears which is rotatably fitted at its center over the concentric portion, and a second arm having the other of the external and internal gears which is rotatably fitted at its center over the tapered ring. A resilient member engages the tapered ring for normally pressing the tapered ring axially along the shaft in a direction to strengthen meshing engagement between the external and internal gears.

Abstract: A door lock/unlock detector for use within a theft prevention device for an automobile includes a door lock cylinder having a key-actuator rotor rotatable between a lock position and an unlock position. A detector plate is mounted upon the key-actuator rotor for rotation therewith. A first detector comprising a reed switch is positioned so as to confront the detector plate when the key-actuator rotor move to the lock position. A second detector comprising a reed switch is positioned so as to confront the detector plate when the key-actuated rotor is moved to unlock position.

Abstract: An automobile theft prevention device has an idle swing mechanism including first, second, and third levers. The first and second levers are coaxially coupled to each other for angular movement and connected between an engine hook lock and an engine hood lever for opening the engine hood. The third lever is actuatable by means of a solenoid for in turn moving a connecting pin loosely fitted within slots defined respectively within the first and second levers. When an automobile door is locked, the solenoid is energized so as to move the connecting pin disposed within the slots into a position where the first lever is idly movable with respect to the second lever. Thus, the engine hood cannot be opened even if the engine hood lever is operated. The connecting pin can be moved back to its original position so as to connect the first and second levers only when the door is unlocked properly as by, for example, by means of a key for the door.

Abstract: A reclining angle adjustment device has a pawl angularly movably mounted on a lower arm, an upper arm pivotally mounted by an angularly movable shaft on the lower arm and having an inner gear, an intermediate gear plate having an outer gear meshing with the inner gear and a rack engageable with the pawl, and a release lever angularly movably mounted on the upper arm for releasing the pawl out of mesh with the rack for roughly adjusting the angle of inclination of the upper arm. The angularly movable shaft, the inner gear, and the outer gear jointly constitute a planetary gear mechanism. A control handle is rotatably mounted on the lower arm and operatively connected through the planetary gear mechanism to the upper arm in power-transmitting relation for finely adjusting the angle of inclination of the upper arm.

Abstract: A reclining angle adjustment device includes a brake mechanism mounted on a control handle shaft for transmitting angular movement of a control handle to an angularly movable shaft, a stopper arm rotatably mounted on the angularly movable shaft and angularly movable by a driven member of a transmission mechanism, and stoppers for limiting angular movement of the stopper arm to determine a range of fine reclining angle adjustment.

Abstract: A reclining angle adjustment device for use with a reclining seat includes a pair of lock mechanisms adapted to be disposed respectively on the outer and inner sides of the reclining seat. Each of the lock mechanisms is capable of rough adjustment of the angle of inclination of the second arm with respect to the first arm, and of fine adjustment of the angle of inclination. The reclining angle adjustment device also includes a pair of hook plates coupled respectively to release levers of the lock mechanisms, a connecting pipe extending between and attached to hook plates for transmitting motion between the release levers, and a connecting bar inserted through the connecting pipe and coupled to angularly movable shafts of the lock mechanisms for transmitting motion between the angularly movable shafts. The connecting bar includes ends having serrated inner peripheral surfaces defining recesses.

Abstract: A reclining angle adjustment device for use with a reclining seat includes an intermediate gear plate having an outer gear, a first arm having an inner gear meshing with the outer gear, an angularly movable shaft having concentric and eccentric portions on which the intermediate gear plate and the first arm are angularly movably mounted, respectively, a second arm supporting the angularly movable shaft thereon, a release lever for unlocking the intermediate gear plate from the second arm for rough adjustment of a reclining angle, a control handle for turning the angularly movable shaft for fine adjustment of the reclining angle, a pin secured to the second arm by a pin bracket and having a groove, a spiral spring having an inner and engaging in the groove for imposing a turning force produced at an outer end thereof on the intermediate gear plate, and a hook plate angularly movably mounted on the pin for transmitting the turning force of the spiral spring to the intermediate gear plate through the hook plate,

Abstract: An apparatus for positioning the backrest of a vehicle seat to facilitate an occupant's entry and exit from the vehicle. The apparatus includes a seat frame mounted on the floor of a vehicle and a backrest frame pivotally connected to the seat frame. A pawl member releasably engages the seat frame from teeth on the backrest frame and is controlled by an operating lever to adjust the pivotable position of the backrest. A support member slidably positions the seat frame along the vehicle and includes a pair of spaced lower rails and a pair of complimentary upper rails slidably mounted on the lower rails. A locking device mounted on the upper rail prevents sliding movement between the upper and lower rails. A cable means extending between the backrest and the locking device releases the locking device to enable sliding movement between the upper and lower rails when the backrest is pivoted beyond a predetermined position.

Abstract: A reclining angle adjustment device including a pair of locking mechanisms provided at either side of a seat. One locking mechanism cooperates with the other by means by connecting mechanism which includes a play therein. Thus, movement caused by one locking mechanism is transmitted relatively delayed to the other locking mechanism thereby preventing the locking mechanisms from being half-locked based on inconsistency of parts.

Abstract: A reclining angle adjustment device used to obtain best inclination of a reclining seat for passengers, including a seat back arm fixed to a seat back portion, a base arm with an internal gear connected with the seat back arm through an axis, a stopper, a regulating plate, the first control lever and the second control lever. For rough adjustment, the first control lever is inclined forwardly or backwardly by a passenger on seat so as to disengage the stopper from the regulating plate. For minute adjustment, the second control lever is repeatedly moved round upwardly and downwardly so as to roll a pinion in the internal gear provided in the seat back arm.

Abstract: A reclining angle adjusting device used to obtain best angle of inclination of a reclining seat for passengers, including an external gear being activated by a compression spring, the first arm member fixed to a seat with an internal gear, the second arm member fixed to a seat back with an internal gear. Minute adjustment is performed through said external gear by way of rotation of an adjustment handle whereas rough adjustment is performed quickly by pushing said adjustment handle to disengage said external gear from said internal gear of the first arm member.