A training device for developing a golfers swing based on a principle of driving a spike fixed to the sweet spot of a striking surface of a golf club, into the flat target surface of a slab of material selected to permit penetration and fixation of the spike in the target surface. The slab is preferably styrofoam and is supported by a stake inserted through the slab and into the ground. In an alternative arrangement, the slab is temporarily supported in its erect position by inserting its lower ...

An electric swinging gate assembly comprises a gate section hingably mounted onto a vertical post of the fence. An electric motor having a horizontal drive shaft is mounted onto the gate section, wherein a first pulley member is mounted on the free end of the horizontal drive shaft. A second pulley member and a large wheel are mounted on a horizontal axle rod, wherein the ends of the rod are rotatably contained in bearing assembly mounted on the bottom ends of vertical bars of the gate section. ...

There is disclosed a latchbolt assembly which replaces conventional rectilinear latchbolt movement with dual direction swinging movement to reduce binding forces and which uses two independently operable dead latches in association with the dual swinging motions of the latchbolt. To facilitate release, as by key or panic bar actuation, the load of the latchbolt mass and friction is substantially eliminated by coupling the release system to one of the dead latches and thereafter utilizing camming...

A swinging bucket centrifuge rotor has a plurality of peripheral cavities each adapted to seat a swinging bucket suspended from a fixed hanger. The hanger defines a hook which is adapted to support a cross-pin located in each bucket cap. Each bucket cap in turn is formed such that the shaft supporting the cross-pin is spring-loaded to permit its movement along the axis of the bucket. In this manner, a single rotor may accommodate different weight sets of buckets simply by varying the spring cons...

A fluid motor for a backhoe or the like. A hollow motor cylinder is provided with upper and lower end plates to define a motor chamber through which a generally vertical shaft extends. The shaft is journalled for relative rotation and a first vane is located within the motor chamber and is secured to the shaft and sealingly engages the cylinder and the end plates. A second vane is located within the motor chamber and is secured to the cylinder and sealingly engages the shaft. Ports of a first se...

A golf club swinging guide releasably attachable to a lower end of a golf club shaft. The guide includes a housing having a stationary member with an alignment portion which is adjustably alignable perpendicular to the striking face of the golf club head. A wind vane is connected for free rotation to the housing about an upright axis of rotation oriented generally parallel to the club shaft. The wind vane, being responsive to movement of air, thereby visually aligns itself to the direction that ...

A door swinging device for automatically swinging a door hinged to a door supporting frame so as to be angularly movable about a vertical axis. The door swinging device includes: (a) a mechanism for rotating; (b) an arm member adapted to be attached at one end thereof to the rotating mechanism so as to be rotated in a plane; (c) a slider rotatably connected to the other end of the arm member; and (d) a guiding mechanism, adapted to be attached to one of the door and the door supporting frame, fo...

The present invention relates to a propulsion device for a boat. A manually powered ship wherein a wing-like fin whose front edge is round and rear edge is sharp is mounted on a shaft provided in a direction parallel to the longitudinal axis of a ship so that the fin is positioned in water below a hull, and the shaft is rotated reciprocally by human power to thereby swing the fin to obtain a propelling force.

An amusement ride 10 including a tower 12 that pivotably supports an elongated boom 16 that includes an extended end 20 and a pivot 18. A passenger carriage 28 is pivotably attached to the extended end of the boom. The shorter end of the boom includes a moveable counterweight 26 that is operable for raising the boom. The boom is then locked, the counterweight is moved, and the boom is released to swing freely. The movable counterweight includes first and second storage tanks 34 and 35, a counter...

A compact polishing apparatus requires less operating space than a conventional polishing apparatus generally used for polishing semiconductor wafers. The present apparatus has a swing shaft to provide a swing motion to a pressing device including a top ring member. There are three ranges of swing motion, i.e. a polishing range which is a small motion range used for polishing a wafer within the confined area of a turntable, a receiving range which is a medium motion range used for loading/unload...