US157304A - Improvement in railway-ties - Google Patents
Improvement in railway-ties Download PDFInfo
- Publication number
- US157304A US157304A US157304DA US157304A US 157304 A US157304 A US 157304A US 157304D A US157304D A US 157304DA US 157304 A US157304 A US 157304A
- Authority
- US
- United States
- Prior art keywords
- railway
- improvement
- ties
- sleeper
- blocks
- 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
- 241001669679 Eleotris Species 0.000 description 12
- 239000011121 hardwood Substances 0.000 description 8
- 238000000034 method Methods 0.000 description 6
- 235000011194 food seasoning agent Nutrition 0.000 description 4
- 238000003780 insertion Methods 0.000 description 4
- 238000009740 moulding (composite fabrication) Methods 0.000 description 4
- 239000002023 wood Substances 0.000 description 4
- 238000005336 cracking Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000009877 rendering Methods 0.000 description 2
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B3/00—Transverse or longitudinal sleepers; Other means resting directly on the ballastway for supporting rails
- E01B3/46—Transverse or longitudinal sleepers; Other means resting directly on the ballastway for supporting rails made from different materials
Definitions
- the purpose of this invention is still further to increase the. durability, first, by securing greater density and specific gravity, and second by preventing the surface cracking. To accomplish this I make use of the following process:
- the wood to be treated is passed either in the form of blocks or of planks from which the blocksare cut, between two rollers, weighted sufficiently to give the requisite pressure, each roller being uted or grooved in the line of the axis, or diagonally in relation to the axis.
- the blocks are corrugated upon both the upper and lower surfaces, and at the same time compressed and compacted, giving greater solidity and strength, thus rendering them more capable of resisting pressure, and the changes of climate, and the process of seasoning.
- the railway-sleeper prepared by the insertion of blocks of hard wood, corrugated and compressed as herein described, for the purposes set forth.
Description
F. H. WHITMAN.
Railway-Ties.
N0 \57,304,' PatentedvDecJW-SM.
M 2 ya?" l UNITED STATES PATENT OFFICEo FRANCIS H. WHITMAN, OF HARRISON, MAINE.
IMPROVEMENT IN RAILWAY-TIES.
Specification forming part of Letters Patent No. 157,304, dated December 1, 1874 application filed October 19, 1874.
To all lwhom it may concern Be it known that l, FRANCIS H. WHITMAN, of Harrison, in the county of Cumberland and State of Maine, have invented certain new and useful Improvements in Railway-Sleepers; and I do hereby declare that the following is a full, clear, and exact description thereof, that will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings form-ing a part of this specification, in which is shown a side view of my improved sleeper.
Letters Patent of the United States No. 91,893, dated June 29, 1869, have been granted to E. H. Woodsum and myself for an improvement in railwaysleepers, the improvement consisting in the insertion of rectangular blocks of hard wood into the softer wood ofthe sleeper, whereby the durability of the sleeper was greatly increased, the block of hard wood resisting the pressure and action of the rail, which had before rendered the sleeper useless in a comparatively short space of time..
All desired elasticity was obtained for the sleeper thus constructed by the vblocks inserted acting as an air-cushion; the harder and stronger the piece inserted the less motive power is absorbed, and al longer and better service is obtained in proportion to the solidity, strength, and durability of the block.
lt is found, in practice, that the blocks of hard wood, when exposed to heat while seasoning, or while drying after being wet, are liable to crack upon the surface, thereby impairing to some degree the usefulness and durability of the sleeper.
The purpose of this invention is still further to increase the. durability, first, by securing greater density and specific gravity, and second by preventing the surface cracking. To accomplish this I make use of the following process:
The wood to be treated is passed either in the form of blocks or of planks from which the blocksare cut, between two rollers, weighted sufficiently to give the requisite pressure, each roller being uted or grooved in the line of the axis, or diagonally in relation to the axis.
- By this process the blocks are corrugated upon both the upper and lower surfaces, and at the same time compressed and compacted, giving greater solidity and strength, thus rendering them more capable of resisting pressure, and the changes of climate, and the process of seasoning.
What I claim as my invention, and desire to secure by Letters Patent of the United States, is-
The railway-sleeper, prepared by the insertion of blocks of hard wood, corrugated and compressed as herein described, for the purposes set forth. y
In testimony that I claim the foregoing I have hereunto set my hand this 25th day ot' September, 1874.
A FRANCIS H. WHITMAN.
Witnesses GEC. E. BIRD, ARTHUR 1. BIRD.
Publications (1)
Publication Number | Publication Date |
---|---|
US157304A true US157304A (en) | 1874-12-01 |
Family
ID=2226714
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US157304D Expired - Lifetime US157304A (en) | Improvement in railway-ties |
Country Status (1)
Country | Link |
---|---|
US (1) | US157304A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2631784A (en) * | 1950-06-30 | 1953-03-17 | Carl G Anderson | Cinder and cement railroad tie with cushioning means |
-
0
- US US157304D patent/US157304A/en not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2631784A (en) * | 1950-06-30 | 1953-03-17 | Carl G Anderson | Cinder and cement railroad tie with cushioning means |
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