A geometrical instrument useful as a building tool has a T-square with a protractor head revolubly mounted on a stub shaft projecting from an adjacent rectangular panel, the blade of the T-square depending from the mounting. Stop means are combined with the shaft for selectively locking the T-square to the panel.

A dish rack has a wire frame base, a horizontal wire segment coupled to the wire frame base, and a swinging arm pivotably coupled to the horizontal wire segment. The swinging arm has a plurality of holders and a lock mechanism that removably engages the swinging arm with a portion of the wire frame base.

An electromechanical energy converter for a gaseous or vaporous medium comprising a stator (1) with two pot-shaped stator members (1a, 1b), each open at one end face and adjoining each other at these end faces, the stator members surrounding a working space (12) and forming a common magnetically permeated air gap (7) in which a coreless armature coil (25) is displaceably arranged. Arranged in the working space (12) is a freely oscillating piston (14) linked to the armature coil (25). Furthermore...

An actuator particularly for accomplishing the swinging motion of a swinging arm comprises two cylinders using a pressurized medium, the piston rods of the cylinders being connected to a structure rotatable in relation to the swinging arm for the purpose of rotating the swinging arm around a rotation axis by the effect of movements of the pistons of the cylinders. The actuator comprises two control valves, of which one control valve is arranged to guide the pressurized medium either to both cyli...

An ergonomically correct swinging chair assembly has a body support cooperating with a foot rest; which footrest may be moved in order to simplify a seating process while a person is being seated, and then returned to a proper position when desired or after the person is seated.

A swinging device for a wheel set includes a center tube, an axle pipe and a restrictor. The center tube has round plates at the rear section. The round plates comprise lugs thereon. The axle pipe has a curved receiving base with a pair of fins extending from respective sides of the receiving base. The fins comprise through holes for insertion of bolts. The restrictor is pivotally connected to the rear section of the center tube and comprises ditches corresponding in position to the round plates...

On a switch cover attached to a switch body incorporating a switching mechanism and a regulating mechanism from above, an opening is provided to expose a part of an operation knob and to allow the operation knob to be swung. A through hole is provided on the switch body so as to vertically penetrate through the same in a position of the switch body in communication with the opening. Thus, fine sand that has entered through the opening can be discharged to the outside.

A gate apparatus comprising a first frame, a second frame and a plurality of rails, wherein each of the first and second frames comprises a vertical post and a plurality of cross-bars, and wherein the cross-bars of the first frame increase in length from the top cross-bar to the bottom cross-bar, and the difference in length between each cross-bar and the one below it is at least equal to the width of each rail, and wherein the cross-bars of the second frame increase in length from the bottom cr...

A swinging lawn sprinkler including a sprinkling control unit with a gear-operated transmission mechanism attached to one side of a sprinkler mount. A limiting connector having a water outlet connector engaged at one side is correspondingly matched to the gear-operated transmission mechanism and a spraying member. A main driving wheel, an adjusting seat, and a water inlet connector are sequentially coupled at the other end of the gear-operated transmission mechanism. The adjusting seat is equipp...

A rake is described, having wheels mounted rotatably thereto which enable the rake to be moved easily from place to place without lifting the rake from the ground. When the rake is pulled towards the user, the comb is locked such that its teeth are in the conventional operative position, i.e. pointing downwardly, but when the rake is pushed away, the comb rotates out of the way to permit the rake to be pushed easily, even over piles of debris just raked.