US57124A - Improvement in taps and dies - Google Patents
Improvement in taps and dies Download PDFInfo
- Publication number
- US57124A US57124A US57124DA US57124A US 57124 A US57124 A US 57124A US 57124D A US57124D A US 57124DA US 57124 A US57124 A US 57124A
- Authority
- US
- United States
- Prior art keywords
- dies
- taps
- improvement
- hardening
- steel
- 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
- 229910000831 Steel Inorganic materials 0.000 description 14
- 239000010959 steel Substances 0.000 description 14
- 239000000463 material Substances 0.000 description 12
- 229910000754 Wrought iron Inorganic materials 0.000 description 10
- CWYNVVGOOAEACU-UHFFFAOYSA-N fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 10
- 238000000034 method Methods 0.000 description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- 210000001513 Elbow Anatomy 0.000 description 2
- 230000001808 coupling Effects 0.000 description 2
- 230000001747 exhibiting Effects 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 239000010985 leather Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 239000011780 sodium chloride Substances 0.000 description 2
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
- B23P15/28—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass cutting tools
- B23P15/48—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass cutting tools threading tools
Definitions
- My invention consists in a process to enable the employment of wrought-iron as a substitute for steel in the manufacture of taps and dies, by case-hardening the taps and dies to so great a depth as to answer all the purposes of the best steel taps and dies in cutting threads, and possess greater toughness vthan the latter.
- My invention also lessens the first cost of taps and dies, by using a much cheaper material than steel, and a material that can be worked into the required form in a shorter time.
- the taps and dies I have manufactured have been used for months and show no signs of wear, and are apparently equal in hardness and superior in toughness to those 0f steel.
- a tap of sufficient size for one and one-half pipe-elbows of the case-hardened wrought-iron Will cost in manufacture and material but oneifth the cost of the customary steel taps of the same size.
- the articles p being forged, turned, and chased I prepare my case-hardening material by burning leather to a crisp, and finely pulverize the same, and mix with each gallon thereof one quart of dry sand and one quart of salt. The articles are then embedded iu the powder wit-hin a close box, and kept at a red heat for three hours, or lou ger, if necessary.
- iron 1s easy to procure of any size, and does not need to be jumped or stove endwise in order to get the required thickness, au operation that is liable to injure the steel.
- the case-hardening material being already partially burnt, and being applied in the form of powder, enables it to enter minutely all the chinlrs and corners of the die.
- Figure l is a side view of a tap as used for pipe elbows and couplings.
- Fig. 2 1s au axial section of my case-hardened wrought-iron tap, exhibiting the depth to which the hardening is extended, A being the body ofthe tap, and B the case-hardening.
- Fig. 3 is a perspective View of a pair of dies casehardened, the portion sectioned showing the depth ot' hardening, C being the body of the die, and D the case-hardened surface.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Forging (AREA)
Description
UNITED STATES PATENT OEEICE.
FRANKLIN S. GREGG, OF CINCINNATI, OHIO.
IMPROVEMENT IN TAPS AND DIES.
Specification forming part of Letters Patent No. 57,124, dated August 14, 1866.
To all whom it may concern:
Be it known that I, FRANKLIN S. GREGG, of Cincinnati, Hamilton county, State of Ohio, have invented a certain new and useful Improvement in Taps and Dies; and I do hereby declare the following to be a full, clear, and exact description thereof, reference being had to the accompanying drawings, making part of' this specification.
My invention consists in a process to enable the employment of wrought-iron as a substitute for steel in the manufacture of taps and dies, by case-hardening the taps and dies to so great a depth as to answer all the purposes of the best steel taps and dies in cutting threads, and possess greater toughness vthan the latter.
My invention also lessens the first cost of taps and dies, by using a much cheaper material than steel, and a material that can be worked into the required form in a shorter time. I have succeeded, by using somewhat different materials for ease-hardening than heretofore known, and by exposing the taps and dies a greater length ot' time to the pro cess, in producing wrought-iron taps and dies that are fully equal to the best made steel taps and dies in ability to cut screws, while they exceed them in toughness and durability.
The taps and dies I have manufactured have been used for months and show no signs of wear, and are apparently equal in hardness and superior in toughness to those 0f steel.
A tap of sufficient size for one and one-half pipe-elbows of the case-hardened wrought-iron Will cost in manufacture and material but oneifth the cost of the customary steel taps of the same size.
The articles p being forged, turned, and chased, I prepare my case-hardening material by burning leather to a crisp, and finely pulverize the same, and mix with each gallon thereof one quart of dry sand and one quart of salt. The articles are then embedded iu the powder wit-hin a close box, and kept at a red heat for three hours, or lou ger, if necessary.
One advantage of the use of iron is, that it 1s easy to procure of any size, and does not need to be jumped or stove endwise in order to get the required thickness, au operation that is liable to injure the steel. The case-hardening material being already partially burnt, and being applied in the form of powder, enables it to enter minutely all the chinlrs and corners of the die.
Figure l is a side view of a tap as used for pipe elbows and couplings. Fig. 2 1s au axial section of my case-hardened wrought-iron tap, exhibiting the depth to which the hardening is extended, A being the body ofthe tap, and B the case-hardening. Fig. 3 is a perspective View of a pair of dies casehardened, the portion sectioned showing the depth ot' hardening, C being the body of the die, and D the case-hardened surface.
I claim herein as new and of my invention- The process of manufacturingcase-hardened wrought-iron taps and dies, substantially as described.
In testimony of which invention I hereunto set myhand.
FRANKLIN S. GREGG.
Witnesses:
GEO. H. KNIGHT, JAMES H. LAYMAN.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US57124A true US57124A (en) | 1866-08-14 |
Family
ID=2126664
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US57124D Expired - Lifetime US57124A (en) | Improvement in taps and dies |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US57124A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5664915A (en) * | 1996-03-22 | 1997-09-09 | Hawke; Terrence C. | Tap and method of making a tap with selected size limits |
| US5865847A (en) * | 1997-03-06 | 1999-02-02 | Sulzer Spine-Tech Inc. | Lordotic spinal implant |
-
0
- US US57124D patent/US57124A/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5664915A (en) * | 1996-03-22 | 1997-09-09 | Hawke; Terrence C. | Tap and method of making a tap with selected size limits |
| US5865847A (en) * | 1997-03-06 | 1999-02-02 | Sulzer Spine-Tech Inc. | Lordotic spinal implant |
| US5897593A (en) * | 1997-03-06 | 1999-04-27 | Sulzer Spine-Tech Inc. | Lordotic spinal implant |
| US6120506A (en) * | 1997-03-06 | 2000-09-19 | Sulzer Spine-Tech Inc. | Lordotic spinal implant |
| US6740091B2 (en) | 1997-03-06 | 2004-05-25 | Sulzer Spine-Tech Inc. | Lordotic spinal implant |
| US20040249460A1 (en) * | 1997-03-06 | 2004-12-09 | Sulzer Spine-Tech Inc. | Lordotic spinal implant |
| US7267689B2 (en) | 1997-03-06 | 2007-09-11 | Zimmer Spine, Inc. | Lordotic spinal implant |
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