Patent US2704705A successfully refreshed from Google Patents.
US2704705A
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US
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Method of making diamond laps
Assignee: Hamilton Watch Co
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Filing: 1952-05-27
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Granted: 1955-03-22
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Expires: 1972-05-27
Abstract
No abstract record available.
Inventors
- 👤 Gifford Harry Paxson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 09:50
CPC Classifications
B; B23; B23P; B23P5/00; B24; B24D; B24D18/00; Y; Y10; Y10S; Y10S76/00; Y10S76/12; Y10T; Y10T428/00; Y10T428/12; Y10T428/12014; Y10T428/12028; Y10T428/12063; Y10T428/12139
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
165 words
A METHOD OF MAKING A DIAMOND LAP, CONSISTING IN BORING A HOLE LONGITUDINALLY OF THE STEEL ROD OF THE EXACT DIAMETER AND TWICE THE LENGTH OF THE DESIRED ABRASIVE PORTION OF THE LAP, INTRODUCING SOLDER INTO THE BORE THUS FORMED AND FILLING THE BORE SLIGHTLY OVER HALF FULL WITH A HOMOGENEOUS MIXTURE OF DIAMOND POWDER AND METALLIC POWDER, INSERTING A PUNCH INTO THE BORE AND TAMPING THE POWDER, APPLYING HEAT TO A TEMPERATURE OF 1500* TO FULLY SINTER THE MIXTURE OF DIAMOND POWDER AND METALLIC POWDER TO FORM AN ABRASIVE SECTION, SUBJECTING SAID SECTION TO PRESSURE 70,000 POUNDS PER SQUARE INCH WHILE HOT, REMOVING THE MAJORITY OF SAID PUNCH IN THAT PART OF THE ROD WHICH PROJECTS BEYOND THE ABRASIVE SECTION, GRINDING THE END OF SAID ROD INCLUDING THE PUNCH UNTIL THE ABRASIVE SECTION IS EXPOSED, TURNING THE SIDE OF THE BORE FROM THE ABRASIVE SECTION UNTIL SAID ABRASIVE IS EXPOSED, AND UNDERCUTTING THAT PORTION OF THE STEEL ROD DIRECTLY CONNECTED TO THE ABRASIVE SECTION.
Claim 2
Independent Claim
165 words
A METHOD OF MAKING A DIAMOND LAP, CONSISTING IN BORING A HOLE LONGITUDINALLY OF THE STEEL ROD OF THE EXACT DIAMETER AND TWICE THE LENGTH OF THE DESIRED ABRASIVE PORTION OF THE LAP, INTRODUCING SOLDER INTO THE BORE THUS FORMED AND FILLING THE BORE SLIGHTLY OVER HALF FULL WITH A HOMOGENEOUS MIXTURE OF DIAMOND POWDER AND METALLIC POWDER, INSERTING A PUNCH INTO THE BORE AND TAMPING THE POWDER, APPLYING HEAT TO A TEMPERATURE OF 1500* TO FULLY SINTER THE MIXTURE OF DIAMOND POWDER AND METALLIC POWDER TO FORM AN ABRASIVE SECTION, SUBJECTING SAID SECTION TO PRESSURE 70,000 POUNDS PER SQUARE INCH WHILE HOT, REMOVING THE MAJORITY OF SAID PUNCH IN THAT PART OF THE ROD WHICH PROJECTS BEYOND THE ABRASIVE SECTION, GRINDING THE END OF SAID ROD INCLUDING THE PUNCH UNTIL THE ABRASIVE SECTION IS EXPOSED, TURNING THE SIDE OF THE BORE FROM THE ABRASIVE SECTION UNTIL SAID ABRASIVE IS EXPOSED, AND UNDERCUTTING THAT PORTION OF THE STEEL ROD DIRECTLY CONNECTED TO THE ABRASIVE SECTION.
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) | 1958-03-21 | 1958-09-20 | 1959-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-03-21 | 1962-09-20 | 1963-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-03-21 | 1966-09-20 | 1967-03-22 | $7700.00 | Window Closed / Lapsed |