Abstract: This invention provides a compact, efficient and well-designed circular fluorescent lamp with high output power. The circular fluorescent lamp has less non-luminant region and good characteristics of luminous intensity distribution, and keeps high level of lamp lumen output. Circular arc tubes are disposed concentrically on the same plane. Electrodes are attached to the tube-end parts of the one side of the circular arc tubes respectively, and the other tube-end parts of non-electrode side are sealed. The circular arc tubes are joined each other near the tube-end parts of the non-electrode side with a bridge-jointed portion, so that a discharge path is formed between the electrodes inside the arc tubes. The tube outer diameter of the circular arc tubes is 14 mm, the circle outer diameter of the outer circular arc tube is 150 mm, and the circle inner diameter of the inner arc tube is 90 mm.

Abstract: The device is used for exercising in a doorframe for mainly developing triceps and biceps muscles. The device comprises a pair of independent handles and at least one pair of brace members secured to vertical sides of the doorframe. The brace members of each pair are connected to opposite vertical sides and are substantially facing each other. Each brace member comprises a boss provided with a bore for removably receiving a holding portion of a corresponding handle. The exercising device leaves to a suitable space for the upper body of the user during the exercises. It is also removable quickly and easily from the doorframe once the workout is finished for getting the handles out of the way.

Abstract: A tunnel excavation apparatus comprises a frame mounted on crawler tracks and provided with pistons comprising stabilizer feet, a power unit, a working unit, and auxiliary movement and positioning services. The working unit is arranged on an arm mounted on one end of telescopic uprights, which are hinged at their other ends to the frame about an axis substantially parallel to the longitudinal direction of the machine, and consists of a rectilinear rigid structure, at the perimeter of which excavation tools are arranged on a chain, to circulate along the side and front of the structure. The tools are hinged to a caisson open on the side opposite the hinged side and provided with apparatus for conveying concrete into its interior.

Abstract: Disclosed is a composite masonry block comprising a substantially rectangular body having a bevelled surface and an interlocking flange. Also disclosed are structure made form the masonry block and methods of making the block.

Abstract: A dough rounding machine with a drum rotatable about a vertical axis, a frame disposed around the drum and a trough which is formed between the drum jacket and a number of trough elements mounted on the frame and extending helically adjacent the jacket. Each trough element has a rail fixedly mounted in the frame and abutting the drum, and a wall portion positioned on the rail and displaceable relative to the jacket. The dough rounding machine further comprises a control unit for adjusting the width of the trough, the unit comprising rotatable rods extending from the lower part to the upper part of the drum and substantially parallel to the drum jacket, and link means interconnecting the rods and the wall portions.

Abstract: An improved, simply operable, self-servicing vending system for wheeled vehicles, particularly of the hand-operated cart-type. A vending island is designed to guide and retainably hold a plurality of wheeled carts in consecutive alignment. The vending island includes a platform for holding the carts having vehicle handling receiving and dispensing terminals. Carts are irremovably accepted to the platform at the receiving terminal by a receiver apparatus that is positioned to engage and controllably guide in the receiving direction a support wheel of the cart being received. The receiver apparatus enables a coin refund unit to eject therefrom a predetermined monetary amount upon complete acceptance of the cart by the receiver apparatus to the platform. Carts are dispensed from the platform at the dispensing terminal by a dispenser apparatus.