Abstract: A regenerative room air exchanger for use in a house has a first vertically disposed conduit through which room air flows to be exhausted, the first conduit including a first set of vertically disposed channels, a second vertically disposed conduit through which fresh air flows to the room, the second conduit including a second set of vertically disposed channels with the first and second sets of channels being interdigitated and in counterflow heat exchange relationship with each other, and a jacket surrounding and spaced from the interdigitated channels to form a third vertically disposed conduit between the jacket and the channels, the third conduit being in fluid communication with the first conduit. An exhaust blower is in fluid communication with the first conduit and an inlet blower is in fluid communication with the second conduit.

Abstract: A bed which is movable between a horizontal open position and a vertical closed position wherein a counterbalancing mechanism comprising two levers and gas springs are placed at the foot of the bed in order to provide a lifting moment for help in closing the bed and a gravitational restraint when opening the bed.

Abstract: The disclosure is directed to a water-powered toothbrush appliance or the like wherein the water-powered motor for driving the toothbrush is mounted in a hand held housing. A valve for controlling fluid flow to the water-powered motor is mounted in the housing and a valve control portion is rotatably mounted by the housing at an area thereof which generally underlies the thumb of a hand holding the appliance. The valve control portion is rotatable by the user's thumb to actuate the valve. In order to efficiently utilize the space within the housing, while maintaining optimum proportions thereof for convenient handling by the human hand, the valve is mounted within the housing on the side of the motor more distant from the valve control portion and the valve control portion is mechanically connected to the valve by an actuator which is arranged to pass directly through the nutating action motor.