US4389709A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Programmable indicator system
Assignee: Mobil Oil AS
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Filing: 1980-10-08
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Granted: 1983-06-21
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Expires: 2000-10-08
Abstract
Abstract A system is described for indicating the appropriate time to perform preventive maintenance operations upon a machine tool. The system includes a signal generator which is to be connected to the machine tool to generate signals whenever the tool is in operation. These signals are integrated and a threshold sensitive detector responsive to the output of the integrator produces a control signal. The control signal is then applied to a audio/visual indicating means to notify operators of the advent of a particular preventive maintenance operation to be performed upon the machine tool.
Inventors
- 👤 Ernst Knibiehler
- 👤 Georg Hirmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:38
CPC Classifications
F; F16; F16N; F16N29/00; F16N29/04; G; G07; G07C; G07C3/00; G07C3/02
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
106 words
A programmable system for indicating the expiration of appropriate time spans to perform preventive maintenance operations upon a machine tool comprising: a signal generator adapted to be connected to the machine tool to generate signals whenever the tool is in operation, integrating means connected to said generator to accumulate said signals with at least two threshold sensitive outputs, at least two respectively resettable storage means inter-connected between said outputs and at least two respectively indicator means for indicating the advent of the particular maintenance operations, a programming unit comprising a plurality of switches to selectively connect said indicator means via said storage means to said outputs.
Claim 2
Dependent Claim
106 words
A programmable system for indicating the expiration of appropriate time spans to perform preventive maintenance operations upon a machine tool comprising: a signal generator adapted to be connected to the machine tool to generate signals whenever the tool is in operation, integrating means connected to said generator to accumulate said signals with at least two threshold sensitive outputs, at least two respectively resettable storage means inter-connected between said outputs and at least two respectively indicator means for indicating the advent of the particular maintenance operations, a programming unit comprising a plurality of switches to selectively connect said indicator means via said storage means to said outputs.
Claim 3
Dependent Claim
13 words
The system of claim 1 wherein said integrating means is a pulse counter.
Claim 4
Dependent Claim
14 words
The system of claim 2 wherein said pulse counter is a binary ripple counter.
References Cited (Backward Citations)
US2946646A
Cited
US3275987A
Cited
US3603880A
Cited
US3546693A
Cited
US3559188A
Cited
US3864560A
Cited
US3938128A
Cited
US4237371A
Cited
US4135246A
Cited
US4245316A
Cited
US4276468A
Cited
US4159531A
Cited
US4260986A
Cited
US4208718A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-06-20 | 1986-12-20 | 1987-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-06-20 | 1990-12-20 | 1991-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-06-20 | 1994-12-20 | 1995-06-21 | $7700.00 | Window Closed / Lapsed |