Described briefly, according to a typical embodiment of the invention, a roller has a core comprising plurality of relatively hard and rigid segments fastened together in a stack and rotatably mounted to a shaft. The roller core has internal baffled passageways established by grooves in abutting faces of segments, so that, when paint is supplied to a cavity in the center of the stack, it will depart through these passageways in the roller in a controlled manner. A diaphragm seal assembly is prov...

A painting apparatus has a peristaltic pump having a pump cavity in a pump body and a pumping tube in the cavity. The cavity is provided with an elongate drain passage. A photoelectric sensor is arranged to receive light from a light source, both being associated with the drain passage to sense any leakage of paint from the pumping tube draining into the drain passage and to thereupon stop the pump. An alert light may be provided for signalling that paint leakage has stopped the pump. Preferably...

A brush holder mounted on a container of cleaning fluid includes clips engaging the handles of one or more brushes to support the brushes with the bristles thereof extending vertically into the cleaning fluid. Two vertically-spaced motor-driven cranks, rotatable in synchronism with each other about vertically spaced horizontal axes, have a horizontally extending crank pin, the lower crank pin being received in a hole in the brush holder, and the upper crank pin being received in a slot in the br...

A paint roller is provided with a removable sleeve receiving a cover having a pile on a stretchable flexible backing. A reversible, speed controllable pump on a hand cart provides paint to the roller from a supply under control of a switch at the roller handle. The roller handle contains a radio transmitter for transmission of pump control signals to a receiver in a pump housing mounted to the hand cart. A peristaltic pump is used for the pumping, and is reversible to facilitate draining of the ...

A paint roller is provided with a removable sleeve receiving a cover having a pile on a stretchable flexible backing and retained by end caps with a bayonet-type connection for convenient installation and removal of the cover. A reversible, speed controllable pump on a hand cart provides paint to the roller from a supply under control of a switch at the roller handle. The roller handle contains a radio transmitter for transmission of pump control signals to a receiver in a pump housing mounted t...

A method and apparatus for enhancing the operation of computer keyboards. The keyboard includes a plurality of keys, and code generation means for producing make and break codes when keys are depressed and released. The invention comprises a processor coupled to receive the generated codes. The processor detects a sequence of codes serially including a make code of a trigger key, a make code of a target key different from the trigger key, and a break code of the target key. A timer determines wh...

A method and apparatus for enhancing the operation of computer keyboards is disclosed. The invention allows touch-typing of nontouch-type keys by detecting a triggering sequence in the touch-type keys. For example, by holding down the Space Bar while depressing and releasing a second key and before release of the Space Bar, the Space Bar is seen to act as a Control key. Furthermore, the functions of nontouch-type keys may be superimposed upon touch-type keys and accessed in a similar manner. The...