GB793873A - Means for detecting tool breakage in machines - Google Patents
Means for detecting tool breakage in machinesInfo
- Publication number
- GB793873A GB793873A GB1682455A GB1682455A GB793873A GB 793873 A GB793873 A GB 793873A GB 1682455 A GB1682455 A GB 1682455A GB 1682455 A GB1682455 A GB 1682455A GB 793873 A GB793873 A GB 793873A
- Authority
- GB
- United Kingdom
- Prior art keywords
- drill
- coil
- tool
- machine
- bias
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B49/00—Measuring or gauging equipment on boring machines for positioning or guiding the drill; Devices for indicating failure of drills during boring; Centering devices for holes to be bored
- B23B49/001—Devices for detecting or indicating failure of drills
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Machine Tool Sensing Apparatuses (AREA)
Abstract
793,873. Drilling-machine &c. details. AUSTIN MOTOR CO., Ltd., HIGHFIELD, F. W. W., and BRIERLEY, R. W. June 4, 1956 [June 10, 1955], No. 16824/55. Class 83 (3). [Also in Groups XXXVI and XL (c)] Means for stopping a machine when the tool 10, e.g. a drill, reamer, boring bar, tap, &c., breaks, comprises an inductance-coil L1 encircling the tool and connected to an oscillatory valve-circuit including a relay A controlling a switch for stopping the machine, the presence of the tool in the field of the coil preventing the circuit from oscillating, so that automatic grid-leak-bias is absent and the valve V1 is fully conducting to maintain the relay energized, whilst upon the tool breaking and becoming removed from the field of the coil, the circuit oscillates, a negative-grid-bias is automatically produced, and the resulting decrease in valve-current de-energizes the relay A to stop the machine, and preferably also operates a visible or audible signal or both. The impedance of the coil L1, which may be shrouded from the influence of adjacent metal objects (other than the drill 10), and incorporated in the drill-jig 11, is reduced and the oscillatory voltage developed across it falls as the drill &c., is fed towards the work, until the voltage is insufficient to maintain oscillation and the grid-bias disappears.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1682455A GB793873A (en) | 1955-06-10 | 1955-06-10 | Means for detecting tool breakage in machines |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1682455A GB793873A (en) | 1955-06-10 | 1955-06-10 | Means for detecting tool breakage in machines |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB793873A true GB793873A (en) | 1958-04-23 |
Family
ID=10084351
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1682455A Expired GB793873A (en) | 1955-06-10 | 1955-06-10 | Means for detecting tool breakage in machines |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB793873A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116329598A (en) * | 2023-03-20 | 2023-06-27 | 东莞市腾信精密仪器有限公司 | Precise deep hole numerical control machining equipment for stainless steel parts |
-
1955
- 1955-06-10 GB GB1682455A patent/GB793873A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116329598A (en) * | 2023-03-20 | 2023-06-27 | 东莞市腾信精密仪器有限公司 | Precise deep hole numerical control machining equipment for stainless steel parts |
| CN116329598B (en) * | 2023-03-20 | 2023-12-05 | 东莞市腾信精密仪器有限公司 | Precise deep hole numerical control machining equipment for stainless steel parts |
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