US139487A - Improvement in drill-gages - Google Patents
Improvement in drill-gages Download PDFInfo
- Publication number
- US139487A US139487A US139487DA US139487A US 139487 A US139487 A US 139487A US 139487D A US139487D A US 139487DA US 139487 A US139487 A US 139487A
- Authority
- US
- United States
- Prior art keywords
- drill
- gages
- improvement
- gage
- point
- 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 - Lifetime
Links
- 238000004519 manufacturing process Methods 0.000 description 6
- MJBPUQUGJNAPAZ-AWEZNQCLSA-N butin Chemical compound C1([C@@H]2CC(=O)C3=CC=C(C=C3O2)O)=CC=C(O)C(O)=C1 MJBPUQUGJNAPAZ-AWEZNQCLSA-N 0.000 description 4
- 230000001154 acute Effects 0.000 description 2
- 230000001105 regulatory Effects 0.000 description 2
- 238000005476 soldering Methods 0.000 description 2
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q17/00—Arrangements for observing, indicating or measuring on machine tools
- B23Q17/09—Arrangements for observing, indicating or measuring on machine tools for indicating or measuring cutting pressure or for determining cutting-tool condition, e.g. cutting ability, load on tool
- B23Q17/0904—Arrangements for observing, indicating or measuring on machine tools for indicating or measuring cutting pressure or for determining cutting-tool condition, e.g. cutting ability, load on tool before or after machining
- B23Q17/0919—Arrangements for measuring or adjusting cutting-tool geometry in presetting devices
- B23Q17/0938—Cutting angles of drills
Definitions
- This invention relates to the production, as a new article of manufacture, of an improved gage for assisting mechanics in correctly grinding twist-drills.
- 'Ihe object of'my invention is to remedy these evils by producing a drill-gage the parts of which are al1 stationary, and so arranged that a drill of any'size below and including that of the maximum width of the centeringtrough may be centered andgaged by the same instrument with great accuracy without necessitating any experience ou the part of or otherwise connected.
- C D are two plates,
- These plates C D are, by preference, arranged at an angle of one hundred and twenty degrees, (but this angle may be varied according to the requirements of the machinist,) and at E are firmly connected together by soldering or other suitable means, and at F they are provided with extensions ⁇ which are similarly aiixed to the sides A B of the trough.
- the plates C D are so affixed that the bevel of their respective faces shall be equal, and the line of their juncture F shall be perpendicular to and central with the line of the point of juncture of the plates A B.
- drill-gages I By thus constructing drill-gages I obtain a permanent gage, and am able, by means of the trough A B, to center any size of drill, and, by means of the end gage, C D, to insure the "proper angle and equality of bevel, together with a perfectly central point. ⁇ It will also be found that the most inexperienced hands can use this gage with ease 'and accuracy.
- a drillgage constructed with a centering-trough, composed of two plates, A B, connected together at right angles, and a bevel-regulating gage, composed of two plates, C D, connected together and permanently affixed to the centering-trough A B, substantially as shown, and for the purposes described.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Drilling Tools (AREA)
Description
UNITED STATES PATENT OFFICE ALVAH C. TRAFTON, OF WORCESTER, MASSACHUSETTS.
IMPROVEMEN'I, IN DRILL-GAGES.
Specification forming part of nLetters Patent No. 139,487, dated June 3, 1873 application filed March 10, 1873. i
To all whom it may concern:
Be it known that I, ALVAH C. TRAFTON, of Worcester, in the county of Worcester and the Commonwealth of Massachusetts, have invented certain Improvements in DrillGages, of which the following is a speciiication:
`This invention relates to the production, as a new article of manufacture, of an improved gage for assisting mechanics in correctly grinding twist-drills.
In grinding twist-drills great difficulty is experienced in obtaining equally-beveled sides at the point, from the fact that it is necessary that the proper angle shall be given to the drill at the point, and that the sides shall be equally beveled, in order that the drill may run truly. It is almost impossible in practice to grind drills correctly by the eye alone, and even if the bevels are correctly obtained and the point is central, the angle at the point is often either too obtuse or too acute, and consequently the drill will not do its work as well and truly as if the same were ground correctly. In other cases, the bevels on the sides are frequently not alike, and the point is not central, in which case the drill will not cut properly, and will run to one side. From the fact of these diiculties constantly arising, few machinists are able to grind their own` drills properly, and, in consequence, a considerable prejudice has arisen against this tool, and in many cases machinists have f abandoned the use of the same, on'account of the great cost, arisingironij. the constant breaking of drills, owing tot-improper grinding and the difficulty and delay experienced inreplacing the same in many parts of the country. f
I am aware that attempts have been made to produce gages to assistineclranics in grinding drills; butin all cases such gages have been constructed with movable and adjustable guides, regulated by screws or other means, such parts having to be shifted for each size of drill ground; and, as a consequence, considerable experience is required before a mechanic can become so acquainted with the device as to use the same correctly.
'Ihe object of'my invention is to remedy these evils by producing a drill-gage the parts of which are al1 stationary, and so arranged that a drill of any'size below and including that of the maximum width of the centeringtrough may be centered andgaged by the same instrument with great accuracy without necessitating any experience ou the part of or otherwise connected. C D are two plates,
forming the gage. These plates C D are, by preference, arranged at an angle of one hundred and twenty degrees, (but this angle may be varied according to the requirements of the machinist,) and at E are firmly connected together by soldering or other suitable means, and at F they are provided with extensions `which are similarly aiixed to the sides A B of the trough. The plates C D are so affixed that the bevel of their respective faces shall be equal, and the line of their juncture F shall be perpendicular to and central with the line of the point of juncture of the plates A B.
By thus constructing drill-gages I obtain a permanent gage, and am able, by means of the trough A B, to center any size of drill, and, by means of the end gage, C D, to insure the "proper angle and equality of bevel, together with a perfectly central point. `It will also be found that the most inexperienced hands can use this gage with ease 'and accuracy.
Having thus described my invention, what l claim, and desire to secure by Letters Patent, is-
As a new article of manufacture, a drillgage, constructed with a centering-trough, composed of two plates, A B, connected together at right angles, and a bevel-regulating gage, composed of two plates, C D, connected together and permanently affixed to the centering-trough A B, substantially as shown, and for the purposes described.
ALVAH C. TRAFTON.
Witnesses:
JOSEPH B. GARDINER. NATHAN B. GooDNow.
Publications (1)
Publication Number | Publication Date |
---|---|
US139487A true US139487A (en) | 1873-06-03 |
Family
ID=2208901
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US139487D Expired - Lifetime US139487A (en) | Improvement in drill-gages |
Country Status (1)
Country | Link |
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US (1) | US139487A (en) |
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0
- US US139487D patent/US139487A/en not_active Expired - Lifetime
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