US484852A - Boiler-tube cutter - Google Patents
Boiler-tube cutter Download PDFInfo
- Publication number
- US484852A US484852A US484852DA US484852A US 484852 A US484852 A US 484852A US 484852D A US484852D A US 484852DA US 484852 A US484852 A US 484852A
- Authority
- US
- United States
- Prior art keywords
- boiler
- blocks
- tube
- cutters
- cutter
- 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
- 210000002832 Shoulder Anatomy 0.000 description 6
- 239000002184 metal Substances 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000000875 corresponding Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D49/00—Machines or devices for sawing with straight reciprocating saw blades, e.g. hacksaws
- B23D49/002—Machines or devices for sawing with straight reciprocating saw blades, e.g. hacksaws with means to attach the sawing device to the work
Definitions
- This invention relates to tools for cutting tubes of steam-boilers when it is desired to remove them from the boiler-heads.
- Boiler tubes or fines are generally secured to the heads by expanding them in the holes in the heads. This renders it very difficult to remove a tube.
- the tool devised by me is so constructed that it may be inserted in the end of a tube and the cutters expanded to cut through the tube close to the inner side of the boiler-head.
- Figure 1 is a longitudinal section of a tube-cutter embodying my invention.
- Fig. 2 is a plan view thereof.
- Fig. 3 is a front view.
- A design-ates cutter-blocks. These blocks are of segmental form, and as here shown are four in number; but it is to be understood that the number may be varied without departing from the spirit of my invention.
- the blocks when placed together form a cylinder with a longitudinal hole a,which has a taperfrom end to end, the smaller opening being at the front end of the cutter-blocks.
- the blocks are held in cylindrical position, but allowed to expand radially, when required, by means of collar A, of spring metal, such as steel, having its ends loosely lapped, as shown.
- the collar is seated in the annular recesses a in the blocks, so that it.will not slip longitudinally of the Serial No. 436,196. (No model.)
- each cutterblock is provided with aradially-extending integral cutter A and in the rear of the cutters each block A is provided with an integral shoulder A designed to bear against the outer side of the boiler-head and prevent the cutters from slipping too far into a tube.
- A designates an expander consisting of a metal bar having a taper corresponding to the taper of the hole a, so that when the expander is driven through the hole the blocks and cutters Will be expanded laterally.
- the cutter In operation the cutter is placed in a tube and the expander A is inserted. Then by driving the expander inward by striking on its outer end with a hammerthe cutter-blocks will be forced laterally outward and force the cutters through the wall of the pipe. Of course in the first cutting there will be uncut portions of pipe between adjacent ends of the cutters A but these portions are afterward cut by Withdrawing the expander A and turning the blocks to bring the cutters against these uncut portions and again driving in the expander.
Description
tNO Model.)
J. W.'FLE G.
BOILER TUBE BR! No. 484,852. Patented Oct. 25, 1892.
. g Y 2 H "14 till!" v IWIIWILZQ UNITED ST. TES
PATENT OF ICE.
JOHN WVILSON FLEMING, OF BROOKLYN, NEXV YORK.
BOILER-TUBE CUTTER.
SPECIFICATION forming part of Letters Patent No. 484,852, dated October 25, 1892.
Application filed June 10, 1892.
To all whom it may concern.-
Be it known that I, JOHN WILSON FLEMING, of Brooklyn, in the county of Kings and State of New York, have invented certain new and useful Improvements in Boiler-Tube Gutters, of which the following is a specification.
This invention relates to tools for cutting tubes of steam-boilers when it is desired to remove them from the boiler-heads.
Boiler tubes or fines are generally secured to the heads by expanding them in the holes in the heads. This renders it very difficult to remove a tube. The tool devised by me is so constructed that it may be inserted in the end of a tube and the cutters expanded to cut through the tube close to the inner side of the boiler-head.
In the accompanying drawings, Figure 1 is a longitudinal section of a tube-cutter embodying my invention. Fig. 2 is a plan view thereof. Fig. 3 is a front view.
In all the figures the cutters are shown as expanded.
Referring by letter to the drawings, A design-ates cutter-blocks. These blocks are of segmental form, and as here shown are four in number; but it is to be understood that the number may be varied without departing from the spirit of my invention. The blocks when placed together form a cylinder with a longitudinal hole a,which has a taperfrom end to end, the smaller opening being at the front end of the cutter-blocks. The blocks are held in cylindrical position, but allowed to expand radially, when required, by means of collar A, of spring metal, such as steel, having its ends loosely lapped, as shown. The collar is seated in the annular recesses a in the blocks, so that it.will not slip longitudinally of the Serial No. 436,196. (No model.)
blocks. The front portion of each cutterblock is provided with aradially-extending integral cutter A and in the rear of the cutters each block A is provided with an integral shoulder A designed to bear against the outer side of the boiler-head and prevent the cutters from slipping too far into a tube.
A designates an expander consisting of a metal bar having a taper corresponding to the taper of the hole a, so that when the expander is driven through the hole the blocks and cutters Will be expanded laterally.
In operation the cutter is placed in a tube and the expander A is inserted. Then by driving the expander inward by striking on its outer end witha hammerthe cutter-blocks will be forced laterally outward and force the cutters through the wall of the pipe. Of course in the first cutting there will be uncut portions of pipe between adjacent ends of the cutters A but these portions are afterward cut by Withdrawing the expander A and turning the blocks to bring the cutters against these uncut portions and again driving in the expander.
I-laving described my invention, what I claim is- The combination of the segmental blocks having the longitudinal taper-hole, the cutters integral with said blocks, the shoulders in the rear ofthe cutters and integral with the blocks, the spring-collar seated in the annular recesses in the rear of the shoulders, and the tapered expander, substantially as specified.
JOHN WILSON FLEMING.
Witnesses:
J AS. E. WARNER,
L. DUBOIS.
Publications (1)
Publication Number | Publication Date |
---|---|
US484852A true US484852A (en) | 1892-10-25 |
Family
ID=2553701
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US484852D Expired - Lifetime US484852A (en) | Boiler-tube cutter |
Country Status (1)
Country | Link |
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US (1) | US484852A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20070266567A1 (en) * | 2005-12-22 | 2007-11-22 | Michael Graybeal | Pipe Cutting Apparatus and Method |
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0
- US US484852D patent/US484852A/en not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20070266567A1 (en) * | 2005-12-22 | 2007-11-22 | Michael Graybeal | Pipe Cutting Apparatus and Method |
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