Programmable hour meter for recording elapsed operation time

Details Programmable hour meter for recording elapsed operation time Programmable hour meter for recording elapsed operation time

1988-09-13

1990-07-10

Roskoski, Bernard

Horology: time measuring systems or devices

Controlled by a disparate device

Vehicle or vehicle part

368 5, 371 66, G04F 800

Patent

active

049411365

ABSTRACT:
A completely electronic programmable hour meter is disclosed. The hour meter accumulates and displays run time of the device being measured. The hour meter can also count pulses. The meter can be preprogrammed with a maintenance timer limit which is compared to the accumulated run time. If the accumulated run time equals or exceeds the preprogrammed time limit an alarm display flashes. The hour meter will store the accumulated run time for up to 5 years if power is interrupted. This memory retention occurs without use of a battery. The elapsed time is stored in a plurality of registers such that no register is written to more than a preselected number of times, nominally ten thousand, until all the registers have been updated the preselected number of times.

REFERENCES:
patent: 2604940 (1952-07-01), Heptinstall
patent: 3758756 (1973-09-01), Johns
patent: 4501005 (1985-02-01), Miller
patent: 4630292 (1986-12-01), Juricich et al.
patent: 4701858 (1987-10-01), Stokes et al.
patent: 4951782 (1986-05-01), Germer

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