Fluke Corporation

Leviton Manufacturing Company, Inc.

William J Lauby

Steven W Fisher

Charles R Bragg

Howard T Voorheis

Brian Stanley Aikins

Dean S Lipke

Michael F Gallavan

Monte R Washburn

Jennifer Yanni

Dennis Lamb

Craig P Chamberlain

Charles R Jensen

Charles A Bublitz

Ryan Moore

Dean Lipke

Charles Bragg

A multimeter having an elongated housing with a fixed recess for receiving a current-carrying conductor is provided. The multimeter is adapted to measure various parameters including a.c. and d.c. voltage, resistance, and a.c. current. On one end of the elongated housing of the multimeter is a C-shaped current sensor mounted around the fixed recess for measuring a.c. current in the current-carrying conductor and on the other end is a pair of test leads for measuring resistance, a.c. voltage, and d.c. voltage. The current sensor and the test leads provide input signals to an analog-to-digital converter (ADC) to obtain digital samples which are displayed as measurement results according to the selected measurement mode.

Multimeter with current sensor

A voltage measurement instrument such as a digital multimeter is provided with transient overvoltage input protection. Internal walls are integrally molded with the instrument case and disposed in close proximity to the input receptacles and terminals to separate conductive surfaces and provide transient overvoltage barriers. Top and bottom wall portions are fitted together in tongue-and-groove fashion to increase the creepage and clearance path without increasing the linear distance between conductive surfaces. This arrangement also allows the instrument to maintain a low profile.

Voltage measurement instrument having transient overvoltage input

A battery pack includes a generally rectangular case formed by a bottom wall and a generally planar top wall. The top and bottom walls are separated by a pair of parallel side walls that are substantially normal to the top and bottom walls, and by first and second parallel end walls that are substantially normal to the top, bottom, and side walls. A portion of one end wall overhangs the remaining portion of the end wall, and the overhanging portion contains electrical contacts for the battery pack. The electrical contacts are recessed below the outer surface of the battery pack to reduce the likelihood of inadvertent short circuitry of the contacts. The battery pack includes a plurality of battery cells interconnected with circuit components to protect the battery pack during use and recharging.

Compact, shock resistant battery pack

Growing community of inventors

Mukilteo, WA, United States of America

William J Lauby