US5161922A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic micro-stop/tool failure monitor
Assignee: Boeing Co
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Filing: 1990-12-11
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Granted: 1992-11-10
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Expires: 2010-12-11
Abstract
Abstract Electronic measuring and control of countersinking depth and/or failure of a drilling tool. Eddy current proximity detecting means is utilized for stopping and retracting the countersink drilling process after a pre-selected depth is achieved wherein a visual indication of the countersink depth is provided by way of sequentially lit LED segments through structure for detecting a surface up and away from the working end of the tool thereby avoiding contamination problems. Further, detection of vibration or chatter in the workpiece is shown as a means for detecting tool defects.
Inventors
- 👤 Joseph P. Malloy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:13
CPC Classifications
B; B23; B23Q; B23Q15/00; B23Q15/20; B23Q15/22; B23Q15/24; B23B; B23B49/00; B23B49/001; B23B49/003; B23B49/006; B23B2270/00; B23B2270/32; G; G05; G05B; G05B2219/00; G05B2219/30; G05B2219/35; G05B2219/35512; G05B2219/37; G05B2219/37245; G05B2219/37292; G05B2219/37425; G05B2219/45; G05B2219/45129; Y; Y10; Y10T; Y10T408/00; Y10T408/18; Y10T408/21
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
86 words
A system for controlling countersink depth comprising in combination: a threaded adjusted micro-stop having a rotating shaft and a non-rotating base; a disk disposed perpendicular to said rotating shaft; an eddy current device positioned on said non-rotating base of said micro-stop for sensing the advancing position of said disk during countersinking; a set point controller and relay circuit responsive to the output of said eddy current device; said set point controller triggering at a predetermined countersink depth for causing a drill feed to stop and retract.
Claim 2
Independent Claim
86 words
A system for controlling countersink depth comprising in combination: a threaded adjusted micro-stop having a rotating shaft and a non-rotating base; a disk disposed perpendicular to said rotating shaft; an eddy current device positioned on said non-rotating base of said micro-stop for sensing the advancing position of said disk during countersinking; a set point controller and relay circuit responsive to the output of said eddy current device; said set point controller triggering at a predetermined countersink depth for causing a drill feed to stop and retract.
Claim 3
Dependent Claim
16 words
The system of claim 1 further including a visual indicator device responsive to the countersink depth.
Claim 4
Dependent Claim
30 words
The system of claim 2 wherein said indicator device includes a plurality of LED segments which are illuminated when said predetermined depth is reached providing visual feedback to an operator.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-11-10 | 1996-05-11 | 1996-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-11-10 | 2000-05-11 | 2000-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-11-10 | 2004-05-11 | 2004-11-10 | $7700.00 | Window Closed / Lapsed |