Self contained multi-function engine monitor and timer for providing engine running time, job time, service time and tachometer functions

US5644491A · kind A · utility

Assignee

• Sendec Corporation · US

Inventors

• Kenton W. Fiske · Fairport, US
• Edward G. Reehil · Shortsville, US
• Herbert Ley · Wellsboro, US
• David L. Sestito · Fairport, US

Key dates

• Filing date: Jan 31, 1994
• Grant date: Jul 1, 1997
• Expiry date: Jan 31, 2014

Classification

• Technology area (CPC G): Physics
• CPC primary: G07C3/04
• WIPO field: Control
• WIPO sector: Instruments

Abstract

An engine monitor includes, in a self-contained preferably sealed unit, a spark sensor, inductively and capacitively coupled through the case to a spark pick up wire, a timer, and a running time detector, responsive to inputs from the spark pick up to provide total running time, job time, and service time metering. Preferably, storage means are included for storing maximum RPM and spark mode data, that is, data indicating the number of firings per RPM for the particular engine, as well as a preset service interval and one or more auxiliary timers.