초록 ▼

A portable electric tool vacuum cleaner control to permit use of a vacuum cleaner independent of and in conjunction with a portable electric tool is disclosed. The vacuum cleaner control includes a motor control circuit and a motor for operating the vacuum cleaner. An electrical outlet is provided o

A portable electric tool vacuum cleaner control to permit use of a vacuum cleaner independent of and in conjunction with a portable electric tool is disclosed. The vacuum cleaner control includes a motor control circuit and a motor for operating the vacuum cleaner. An electrical outlet is provided on the vacuum cleaner, which is connected to the vacuum cleaner motor control circuit, to enable a portable electric tool to be plugged into the vacuum cleaner electrical outlet. A three position on/off/automatic switch is provided on the vacuum cleaner for operating the vacuum cleaner motor control circuit to enable independent operation of the vacuum cleaner or joint operation of the portable electric tool in conjunction with the vacuum cleaner, as desired.

대표청구항 ▼

[ What is claimed is:] [1.] A vacuum assembly adapted for use with an electric tool, the vacuum assembly comprising:a vacuum motor having a first motor terminal adapted to be coupled to a source of AC power and a second terminal;a gated bi-directional semiconductor switch having a first terminal cou

[ What is claimed is:] [1.] A vacuum assembly adapted for use with an electric tool, the vacuum assembly comprising:a vacuum motor having a first motor terminal adapted to be coupled to a source of AC power and a second terminal;a gated bi-directional semiconductor switch having a first terminal coupled to the second terminal of the vacuum motor and a second terminal adapted to be coupled to the source of AC power so as to provide a path for current to flow from the source of AC power through the vacuum motor when the switch is rendered conductive in response to the application of a current pulse to the gate of the switch;a current sensor for detecting the flow of electric current to the electric tool and generating a DC voltage signal having a magnitude corresponding to the magnitude of the current flowing to the electric tool; andcircuitry for applying the current pulse to the gate of the switch to render the switch conductive while the DC voltage signal exceeds a predetermined value, wherein the current providing the current pulse flows through the vacuum motor.