US132213A - Improvement in spiral springs for railroad cars - Google Patents
Improvement in spiral springs for railroad cars Download PDFInfo
- Publication number
- US132213A US132213A US132213DA US132213A US 132213 A US132213 A US 132213A US 132213D A US132213D A US 132213DA US 132213 A US132213 A US 132213A
- Authority
- US
- United States
- Prior art keywords
- spring
- improvement
- railroad cars
- spiral springs
- spiral
- 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
- 239000002184 metal Substances 0.000 description 6
- 241000252141 Semionotiformes Species 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000002349 favourable Effects 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F1/00—Springs
- F16F1/02—Springs made of steel or other material having low internal friction; Wound, torsion, leaf, cup, ring or the like springs, the material of the spring not being relevant
- F16F1/04—Wound springs
- F16F1/06—Wound springs with turns lying in cylindrical surfaces
Definitions
- the spring when the spring is made of a round rod, or one having a circular sectional area, which on many accounts is the preferable shape, the flattening or tapering of the ends, so as to give the spring the desired surface at right angles to the axis ofthe spring, can be done only after the spring is coiled, as the natural tendency of a rod to twist in the act of coiling would make it altogether uncerof metal, or one having a circular sectional area, the ends of which are conically tapered before ceiling, so that while the ⁇ rod is left free to twist, as it has a tendency to do in the act of coiling, the terminal coils of the spring will always present a bearingsurface at right angles to the axis of the spring, and of course obviating the necessity of filing or grinding the ends after coiling, for the purpose of getting such a surface-an operation that is eX- pensive .and
- the spring is formed of a round rod, A, of steel or other suitable metal, that is coiled into a spiral in the ordinary manner, and by means in common use. Before being coiled the ends c c are conically tapered. This may be done by rolling with rolls suitably constructed, by grinding, or in any manner, at the option of the manufacturer. The taper should extend far enough back upon the rod to give a i'lat bearing upon the whole, or nearly the whole, of the terminal coils.
- a spiral spring formed of a round rod or bar of metal,with conically-tapered ends, substantially as and for the purposes specified'.
Description
J. MURRAY.
Improvement in Spiral-Springs for Railroad Cars.
No. 2,213. Patented Oct.15,1872.
UNITED STATES PATENT OFFICE.
JOHN MURRAY, OF NEW YORK, N. Y.
IMPROVEMENT IN SPIRAL SPRINGS FOR RAILROAD CARS.
Specification forming part of Letters Patent No! 132,213, dated October 15, 1872.
To all Vwhom it may concern:
Be it known that I, JOHN MURRAY, of the city, county, and State of New York, have invented a new' and useful Improvement in Spiral Springs for Railway Gars and other purposes, of which the following is a specification, reference being had to the accompanying drawing, which represents an elevation of a spring embodying my invention.
It is necessary that a spiral'spring, which is designed to sustain pressure at opposite endsapplied as, for example, the bearing or buffer springs of railway carsshould have such pressure `applied to the surface of the entire terminal coils in order to secure the most favorable action of the spring. This result is secured sometimes by providing spirallygroovecl seats for the endsof the spring; but this is attended with certain inconveniences and objections, and the more recent plan has been to grind away or taper the ends of the spring so as to give them surfaces at right angles to the axis of the spring. When the spring is formed of a flat or square rod, and having an angular sectional area, the proper taper may be given to one side or edge ofthe rod before the operation of coiling, as the angular shape of the rod will. enable it to be so held while being coiled, as to present the tapered side or edge squarely at the end of the spring when coiled; but when the spring is made of a round rod, or one having a circular sectional area, which on many accounts is the preferable shape, the flattening or tapering of the ends, so as to give the spring the desired surface at right angles to the axis ofthe spring, can be done only after the spring is coiled, as the natural tendency of a rod to twist in the act of coiling would make it altogether uncerof metal, or one having a circular sectional area, the ends of which are conically tapered before ceiling, so that while the `rod is left free to twist, as it has a tendency to do in the act of coiling, the terminal coils of the spring will always present a bearingsurface at right angles to the axis of the spring, and of course obviating the necessity of filing or grinding the ends after coiling, for the purpose of getting such a surface-an operation that is eX- pensive .and troublesome.
The spring is formed of a round rod, A, of steel or other suitable metal, that is coiled into a spiral in the ordinary manner, and by means in common use. Before being coiled the ends c c are conically tapered. This may be done by rolling with rolls suitably constructed, by grinding, or in any manner, at the option of the manufacturer. The taper should extend far enough back upon the rod to give a i'lat bearing upon the whole, or nearly the whole, of the terminal coils.
What I claim as my invention, and desire to secure by Letters Patent, is-
A spiral spring formed of a round rod or bar of metal,with conically-tapered ends, substantially as and for the purposes specified'.
In testimony whereof l have hereto subscribed my n'ame to this specification this 19th day of July, 1870, before two subscribing witnesses.
witnesses: JOHN MURRAY.
CUERAN DINsMoEE, R. R. Woon.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US132213A true US132213A (en) | 1872-10-15 |
Family
ID=2201630
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US132213D Expired - Lifetime US132213A (en) | Improvement in spiral springs for railroad cars |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US132213A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2586007A (en) * | 1947-03-20 | 1952-02-19 | Heli Coil Corp | Wire coil insert with tapered end |
| US20040123769A1 (en) * | 2002-10-30 | 2004-07-01 | Kawasaki Jukogyo Kabushiki Kaisha | Nonlinear characteristic spring and radius arm type truck using the same |
| US20040219492A1 (en) * | 2003-05-01 | 2004-11-04 | International Business Machines Corporation | Method, system and program product for designing an educational program and providing educational content |
| US20050196732A1 (en) * | 2001-09-26 | 2005-09-08 | Scientific Learning Corporation | Method and apparatus for automated training of language learning skills |
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0
- US US132213D patent/US132213A/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2586007A (en) * | 1947-03-20 | 1952-02-19 | Heli Coil Corp | Wire coil insert with tapered end |
| US20050196732A1 (en) * | 2001-09-26 | 2005-09-08 | Scientific Learning Corporation | Method and apparatus for automated training of language learning skills |
| US20040123769A1 (en) * | 2002-10-30 | 2004-07-01 | Kawasaki Jukogyo Kabushiki Kaisha | Nonlinear characteristic spring and radius arm type truck using the same |
| US20040219492A1 (en) * | 2003-05-01 | 2004-11-04 | International Business Machines Corporation | Method, system and program product for designing an educational program and providing educational content |
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