A deadbolt lock system is provided for a swinging door which prevents movement of the deadbolts from a locked position to an unlocked position when the door is open. Movement of the deadbolts from an unlocked to a locked position when the door is opened is prevented by a slide plate which is locked into a deadbolt deactivating position by a plunger which is biased outward when the door is opened. The system also provides for an unlocking of the deadbolts and an opening of the door with a single ...

An exerciser includes a post having a lower portion rotatably secured to a base. Two pulleys are rotatably supported on the base. Two foot supports are pivotally supported on the base and are coupled to the post by one or two cables which are engaged over the pulleys and the post, such that the foot supports may rotate the post via the pulleys and the cables and such that the user may twist his body while stepping with the foot supports. Two actuators are coupled to the foot supports for applyin...

A swinging seat includes suspension members having coil springs of nonlinear response so that the seat has a desirable bouncy feel for a wide range of weights supported on the seat. The springs in one embodiment are barrel shaped having coils of maximum diameter at the middle and coils of minimum diameter at the opposite ends of the spring.

The present application discloses a tenter arm swinging apparatus in which the swing of a tenter arm is performed by rotating a nut threadedly connected to a fixed screw shaft, and arm swinging means is housed in a case housing said nut. According to the present invention, the whole apparatus may be constructed in a very compact structure and installed readily and conveniently, regardless of the spatial conditions outside the apparatus.

A lock for a swinging door comprises a lock casing having a fore-end and at least a first side wall. A first bolt is spring-loaded for engagement with a stationary engagement member of a door case or the like and is movable between a locking position in which it does not extend beyond the fore-end, and an open position, in which it is retracted into the lock casing. The lock casing has an opening in its fore-end and its first side wall, said opening enabling engagement between the stationary eng...

A mechanical swing doll has a housing having a first chamber defined therein. A seat is mounted in the housing, and has a second chamber defined at a lower part thereof. A gear assembly is installed in the second chamber. A motor is mounted between the housing and the seat for driving the gear assembly. Two sector gears are respectively provided at two sides of the gear assembly and engaged with the gear assembly. Two shanks are pivotally mounted on the seat and respectively driven by the sector...

A plug door for a vehicle, such as a railway carriage, is carried and driven by a swinging lever which has a sliding fulcrum mechanism the effect of which is to flatten the arc through which the door is carried. The edge of the door which trails in an opening movement is guided either by means of a relatively long pivot arm or by a curved or straight track. The alternative guide means give different trajectories to the leading edge of the door, the long pivot arm guide keeps the door closest to ...

A swinging device for a dredger of the kind having a two-part articulated dredging boom comprises at least one jack having a jack body provided with a piston rod, the jack body and the piston rod being connected respectively by two connecting joints to separate parts, one of which is fixed, while the other pivots and is coupled to the movable dredging arm. The connecting joint of said jack body is located on a yoke which prolongs this body on the same side as the side on which the piston rod ext...

A safety latch is disclosed capable of selectively locking an in swinging door in a closed position, permitting the door to open a predetermined angular displacement, or permitting the door to open freely. The latch includes a bracket with a projecting portion offset from the door, and a pivotable bar capable of limited vertical displacement, and having a slot with a long first portion of predetermined width abruptly expanding to a short second portion of greater width. The projecting portion is...

A swinging chuck for turning machines such as lathes or the like comprising a chuck body and chuck jaws mounted on radial pivot axes, means for pivoting the chuck jaws around the pivot axes and means for locking the chuck jaws at the desired pivot position, and axially movable actuation means for causing radial reciprocation of the jaws.