Abstract: A rail apparatus that is attachable to a support surface such as a set of telescoping bleachers and is capable of remaining attached when the support structure is in either an extended, open position or a retracted, closed position. The rail apparatus has a P-shaped handle portion integral with a shaft element that is connected to the support surface through a mounting system having a support socket and spring system. The mounting system is connected to the support surface either on the front, top or side thereof. The spring system is inside the lower portion of the shaft and provides a force that keeps the handle portion of the rail apparatus in place within the support socket, yet allows for the handle portion to be rotated to various other positions if desired.

Abstract: A modular electrical system (10) supplies power to and controls a plurality of electric motors (M.sub.1, M.sub.2, M.sub.3, M.sub.4) associated with a plurality of drive units folding or extending rows in a telescopic seating system, comprising the motors (M.sub.1, M.sub.2, M.sub.3, M.sub.4), a control panel (12) removably communicating with the motors (M.sub.1, M.sub.2, M.sub.3, M.sub.4) directing incoming current to drive the motors (M.sub.1, M.sub.2, M.sub.3, M.sub.4) in a predetermined direction, a dual receptacle (18) communicating with the control panel (12), and a switch (26) terminating in a plug (30) removably communicating with the dual receptacle (18).

Abstract: A drive unit (10) is provided for extending or retracting a telescopic seating system and includes a frame (14) into which a front axle (24) and a rear axle (26) are journaled, a plurality of transversely spaced wheels (28) mounted on the front axle (24) and on the rear axle (26), drive means supported by the frame (14) for imparting rotation to the axles, preferably powered by a reversible electric motor (32), and a mounting assembly temporarily attaching the drive unit (10) to a row (92) of the telescopic seating system, the mounting assembly preferably including upright connectors (80, 82, 84, 86) fastened to the row (92) proximate their upper ends and fixed at their lower ends to longitudinal beams (76, 78) detachably interconnected to the frame (14) through threaded spacers (66). The unit (10) may be additionally provided with weight support brackets (94) supporting an external weight (122) to increase traction between the wheels (28) and a floor upon which the unit (10) travels.

Abstract: A modular electrical system (10) supplies power to and controls a plurality of electric motors (M.sub.1, M.sub.2, M.sub.3, M.sub.4) associated with a plurality of drive units folding or extending rows in a telescopic seating system, comprising the motors (M.sub.1, M.sub.2, M.sub.3, M.sub.4), a control panel (12) removably communicating with the motors (M.sub.1, M.sub.2, M.sub.3, M.sub.4) directing incoming current to drive the motors (M.sub.1, M.sub.2, M.sub.3, M.sub.4) in a predetermined direction, a dual receptacle (18) communicating with the control panel (12), and a switch (26) terminating in a plug (30) removably communicating with the dual receptacle (18).