Abstract: A detachable electric drive unit for a wheelchair is provided. The detachable electric drive unit includes a housing having an interior volume and two guide rails disposed on opposing sides of the housing. Each guide rail includes a channel to receive a wheelchair wheel and has at least two wheels attached to opposing ends of each guide rail. A roller assembly is disposed within the channels of each guide rail. An electric motor is coupled to the roller assembly in each guide rail. The electric motor drives the roller assembly imparting rotational motion to the wheelchair wheels supported within each channel.

Abstract: A detachable electric drive unit for a wheelchair is provided. The detachable electric drive unit includes a housing having an interior volume and two guide rails disposed on opposing sides of the housing. Each guide rail includes a channel to receive a wheelchair wheel and has at least two wheels attached to opposing ends of each guide rail. A roller assembly is disposed within the channels of each guide rail. An electric motor is coupled to the roller assembly in each guide rail. The electric motor drives the roller assembly imparting rotational motion to the wheelchair wheels supported within each channel.

Abstract: A device is provided to protect one's fingers from abrasion and paper cuts whenever forming a creasing line. The device consists of a pair of hinged, open-ended laterally-positioned elongated arms which are capable of providing a controllable creasing pressure at inwardly-facing opposed creasing surfaces. One of the arms is provided with a finger-gripping means to enable firmly holding the device against slippage during use. The finger-gripping means can also be provided with a stiletto-type letter opener. One form of the device can be made to stand upright on a desk for ready grasping in the identical position in which it will be used, and also has outwardly-facing surfaces carrying an advertising message or logo which are easily readable when the device is placed in such upright position.

Abstract: A method and device are provided to protect one's fingers from abrasion and paper cuts whenever forming a creasing line. The device consists of a pair of laterally-positioned elongated arms which are capable of providing a controllable creasing pressure at inwardly-facing opposed creasing surfaces. One of the arms is provided with a finger-gripping means to enable achieving a firm hold on the device during use as well as to prevent slippage of one's fingers from the device as it is moved while the crease is being formed. A stiletto-type letter opener and a sheet comber can also be provided with the device. The device can be made to stand upright on a desk for ready grasping in the identical position in which it will be used, and also has surfaces which are capable of carrying an advertising message or logo which are easily readable when the device is placed in such upright position.

Abstract: The anchor utilizes a pair of horizontally-offset male/female connections between the base and the anchor, the outer one of which connections is adjacent the outer edges of the base so as to minimize the effects of torque applied as when a player slides into a base while attempting a "steal". The horizontal surface area of the anchor is relatively large to enable a dirt-covered anchor to be easily located. Important advantages of the design are to avoid anchor obstruction of dragging equipment when the bases are removed, protecting both the equipment and the anchors, and to minimize risk to a player stepping over an anchor which does not have a base covering it.