Hewlett-packard Development Company, L.p.

Other

Richard R Clark

Dennis J Schloeman

Hang Liao

Galen H Kawamoto

Bao Yeh

Daryl E Anderson

Scott A Linn

Mark Hunter

A firing circuit for a thermal inkjet-printing nozzle includes a heater resistor and a switch. The heater resistor heats ink to cause the ink to be ejected from the nozzle. The heater resistor has a first end and a second end, the second end connected to a ground. The switch controls activation of the heater resistor. The switch has a first end connected to a voltage source and a second end connected to the first end of the heater resistor. The switch operates in a constant current mode, such that an at least substantially constant current flows through the heater resistor upon activation.

Constant current mode firing circuit for thermal inkjet-printing nozzle

Embodiments of nozzle disable systems and methods are disclosed.

Disabling a nozzle

A system for sound generation and noise feedback is disclosed for attachment to a bicycle training wheel. The system includes a plurality of sound generators attachable by a means for fastening to a rotatable surface of the training wheel. As the sound generators rotate with the wheel, sound is generated in proportion to the speed of wheel rotation. The sound generation system further includes a sound generator attachable to the support frame of a bicycle wheel. A clapper is pivotably attachable proximal to the sound generator, for intermittent contact with the sound generator when the clapper is engaged by one or more projections connected to, and rotated by the wheel. The generation and feedback system further includes a light generator and an electrical circuit connected to the sound generator for intermittent generation of sound and light in proportion to the rotation of the training wheel.

Noise feedback for training wheels

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Corvallis, OR, United States of America

Richard R Clark