Abstract: A wheelchair having a hand operated steering mechanism that can be easily mounted and/or dismounted from the chair. The mechanism involves a steering rod having a center section cojoined to an upper section and a lower section by means of a pair of universal joints. The lower section of the shaft is slidably secured to the fork of one of the chair casters and the top section is rotatably mounted in a bearing block which is, in turn, secured to the front column of one of the chair arms. A crank arm is slidably received in the top section of the steering rod to provide sufficient leverage by which the chair occupant can turn the caster. An adjustable locking mechanism is also operably associated with the shaft for holding the caster at a desired position to prevent the chair from moving in an uncontrollable manner.

Abstract: Apparatus for retarding the momentum of a treadmill including a flywheel operatively associated with the belt of the treadmill, a brake arranged to move into and out of engagement with the flywheel and a manually operated lever for operating the brake whereby a person on the treadmill can, at his or her option, retard or stop the motion of the treadmill.

Abstract: Control apparatus for regulating the operation of a warm air furnace having a conventional thermostat control arranged to turn the furnace burner on and off. Circuit means are arranged to override the thermostat to turn the burner off when the temperature of the flue gases leaving the furnace are above a first level and to hold the burner inactive until the flue temperature drops to a second lower level. A bypass circuit is also provided to hold the burner in operation anytime conditioned air returned to the furnace from the comfort zone falls below a predetermined temperature.

Abstract: An invalid cart and lift, designed primarily for use in hospitals and the like, is comprised of a horizontally disposed frame movable on two back wheels and a front steering wheel. A steering shaft, extending vertically from the front steering wheel, has at its upper end a drop down handle by which this cart it pulled and steered. A housing extending vertically from the frame supports a vertically movable seat. A manual crank operates through a mitre gear and a ball nut-screw combination to raise and lower the seat. A friction brake when engaged holds the seat at a desired level. A sanitary chin and chest rest adjustable to the invalid's height raises and lowers with the seat. A safety belt with a positive lock prevents the invalid from falling from the seat.