Abstract: A single-piece side wheel attachment member for removably attaching an auxiliary side wheel to a bicycle is provided. The attachment member has a single-piece molded structure, including an upper vertical portion and a lower substantially horizontal spindle portion connected through a C-shaped compliant structure for allowing the spindle portion to move vertically when subjected to force. In its natural unbiased condition, the vertical and horizontal portions of the member extend generally perpendicular to one another. The upper vertical portion includes a projection and at least one through-hole for insertion on the rear wheel axle of the bicycle. The horizontal spindle portion is rotatably engaged by the auxiliary side wheel, therefore acting as its axle. Both ends of the attachment member can angularly move relative to one another due to the C-shaped compliant structure.

Abstract: This invention is a single-piece side wheel attachment member for removably attaching an auxiliary side wheel to a bicycle. The attachment member comprises a single-piece molded structure, including an upper vertical portion and a lower substantially horizontal spindle portion connected to said vertical portion through a C-shape compliant structure for allowing said spindle portion to move vertically when subjected to force. In its natural unbiased condition, the vertical and horizontal portions of the member extend generally perpendicular to one another. The upper vertical portion includes a projection and at least one through-hole for insertion on the rear wheel axle of the bicycle. The horizontal spindle portion is rotatably engaged by the auxiliary side wheel, therefore acting as its axle. Both ends of the attachment member can angularly move relative to one another due to the C-shape compliant structure.

Abstract: This invention is a side wheel attachment for removably attaching an auxiliary side wheel to a bicycle. The side wheel attachment comprises a single structural rod which is folded in the desired shape, i.e. forms a helical torsion spring. In natural unbiased condition, the first and second ends of the spring rod extend generally perpendicularly to one another. The first end of the spring is inversely U-shaped and tangentially engages by its web the rear axle of the bicycle where it can be fixed after adjusting its vertical position relative to the bicycle. The second end of the spring rod is rotatably engaged by the auxiliary side wheel, therefore acting as its axle. Both ends can angularly move relative to one another due to the helical spring. Therefore, in use, both auxiliary side wheels (installed on one side and the other of the rear bicycle wheel) and the rear bicycle wheel loaded by a bicycle rider, always stay in contact with the ground so as to accomplish their respective tasks.

Abstract: This invention is a side wheel attachment for removably attaching an auxiliary side wheel to a bicycle. The side wheel attachment comprises a single structural rod which is folded in the desired shape, i.e. forms a helical torsion spring. In natural unbiased condition, the first and second ends of the spring rod extend generally perpendicularly to one another. The first end of the spring is inversely U-shaped and tangentially engages by its web the rear axle of the bicycle where it can be fixed after adjusting its vertical position relative to the bicycle. The second end of the spring rod is rotatably engaged by the auxiliary side wheel, therefore acting as its axle. Both ends can angularly move relative to one another due to the helical spring. Therefore, in use, both auxiliary side wheels (installed on one side and the other of the rear bicycle wheel) and the rear bicycle wheel loaded by a bicycle rider, always stay in contact with the ground so as to accomplish their respective tasks.

Abstract: A coin whirling device for use in a coin-operated arcade game machine, the arcade game machine being of the type having a housing provided with a coin intake slit, for feeding discoid money coins into the enclosure defined within the housing and about a first plane, and a coin processor, located within the housing enclosure and operatively connected to the coin intake slit. The coin whirling device consists of a vertical cylinder, for capturing a coin fed into the housing. An axial slit in the cylinder opens into an upper end recess, being made up of two downwardly inclined oblique surfaces orthogonal to one another on opposite sides of the slit. These top leading surfaces will bias an incoming coin, oriented transversely thereof, to spin upon strike from the first plane to a second plane at right angle to the above-noted first plane. The coin whirling device provides compactness to the arcade game machine housing with respect to its dimensions along the first-mentioned plane, namely, its width.

Abstract: An envelope opener is formed of a rectangular casing having a central transverse guide slot, two cutting disks project into the slot from either side and have mutually interfacing edge portions thereat. A spring resiliently maintains the edge portions of the disks in constant contact in the slot. The guide slot has an upwardly convex bottom surface to reduce friction of an envelope being guided through the slot.