US394007A - John pfeil - Google Patents
John pfeil Download PDFInfo
- Publication number
- US394007A US394007A US394007DA US394007A US 394007 A US394007 A US 394007A US 394007D A US394007D A US 394007DA US 394007 A US394007 A US 394007A
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- US
- United States
- Prior art keywords
- coils
- pfeil
- john
- center
- spring
- 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
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- 230000003247 decreasing Effects 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
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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
- F16F1/08—Wound springs with turns lying in mainly conical surfaces, i.e. characterised by varying diameter
Definitions
- WITNESSES fill/ N70 I w WM/H .2: HMS/V278? UNITED STATES PATENT OFFICE.
- JOHN PFEIL OF PITTSBURG, PENNSYLVANIA, ASSIGNOR OF ONE-HALF TO V. G. VILSON, OF SAME PLACE.
- My improved spring is made from a steel bar of uniform thickness throughout its length. It is coiled in such manner that the diameters of the coils at its center and ends, respectively, being equal, increase and de- 2o crease from both ends, respectively, toward its center, thus producing a spiral spring, both ends and center coils of which, being equal in diameter, are capable of greater resistance than the coils (which are greater in diameter) intermediate such points, respectively, so that whenever said spring is sulnnitted to ordinary pressure the coils intermediate its center and both ends, respectively, yielding more readily than the end and center-coils, are con'lpressed.
- 1 is a coil at one end of said 5 spring,the dian'leterof which continues to illcrease in the coils 2 and 3, respectively, until the maximum diameter of said spring has been attained in coil 4, after which the coils 5 and (5 respectively decrease in diameter correspondingly as the coils 2 and 3 res wctively 40 increase to the center coil, 7, again increasing in diameter in the coils 8 and H, respectively, to the coil to, and decreasing correspondingly in the coils ll and 12 to the other end coil, 13.
- a spiral spring having the coils at both ends and the middle thereof of equal diame- 5o ter, and with the intermediate coils between such end and middle coils increasing and decreasing at predetermined points, whereby the maximum diameter of the spring lies at points distant from each of its ends about one-fourth 5 of its length, substantially as described.
- a spiral spring made from a flat rectangular bar having the end and middle coils thereof equal in diameter, and with the coils of maximum diameter distant from each end about one-fourth of the length thereof and decreasing at predetermined points toward both the contracted middle and end coils, substantially as described.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Percussion Or Vibration Massage (AREA)
- Pistons, Piston Rings, And Cylinders (AREA)
- Developing Agents For Electrophotography (AREA)
Description
(No Model.)
J. PFEIL.
SPIRAL SPRING.
No. 394,007. Patented Dec. 4, 1888.
WITNESSES: fill/ N70 I w WM/H .2: HMS/V278? UNITED STATES PATENT OFFICE.
JOHN PFEIL, OF PITTSBURG, PENNSYLVANIA, ASSIGNOR OF ONE-HALF TO V. G. VILSON, OF SAME PLACE.
SPIRAL SPRING.
SPECIFICATION forming part of Letters Patent No. 394,007, dated December 4, 1888.
Application filed August 18, 1888. Serial No. 282,620. (No modeLl To all whom it may concern.-
l-le it known that I, JOHN PFEIL, a citizen of the l'nited States, residing at Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Spiral Springs; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art IO to which it pertains to make and use the same, relerei'lce being had to the a( companying drawing, which forms a part of this specilication, in which the figure shows an elevation of my improved spiral spring.
My improved spring is made from a steel bar of uniform thickness throughout its length. It is coiled in such manner that the diameters of the coils at its center and ends, respectively, being equal, increase and de- 2o crease from both ends, respectively, toward its center, thus producing a spiral spring, both ends and center coils of which, being equal in diameter, are capable of greater resistance than the coils (which are greater in diameter) intermediate such points, respectively, so that whenever said spring is sulnnitted to ordinary pressure the coils intermediate its center and both ends, respectively, yielding more readily than the end and center-coils, are con'lpressed.
' o (la-eater weight being applied, the end coils are compressed, the center coils still affording great elasticity even after the end coils have been considerably compressed.
In the drawing, 1 is a coil at one end of said 5 spring,the dian'leterof which continues to illcrease in the coils 2 and 3, respectively, until the maximum diameter of said spring has been attained in coil 4, after which the coils 5 and (5 respectively decrease in diameter correspondingly as the coils 2 and 3 res wctively 40 increase to the center coil, 7, again increasing in diameter in the coils 8 and H, respectively, to the coil to, and decreasing correspondingly in the coils ll and 12 to the other end coil, 13.
Having described my inventimi, what I claim, and desire to secure by Letters Patent, is
l. A spiral spring having the coils at both ends and the middle thereof of equal diame- 5o ter, and with the intermediate coils between such end and middle coils increasing and decreasing at predetermined points, whereby the maximum diameter of the spring lies at points distant from each of its ends about one-fourth 5 of its length, substantially as described.
2. A spiral spring made from a flat rectangular bar having the end and middle coils thereof equal in diameter, and with the coils of maximum diameter distant from each end about one-fourth of the length thereof and decreasing at predetermined points toward both the contracted middle and end coils, substantially as described.
In testimony that I claim the foregoing I hereunto aflix my signature this 9th day of August, A. I). 1888.
JOHN PFEIL. [1 3.
In presence of O. (1. LEE, V. G. WILSON.
Publications (1)
Publication Number | Publication Date |
---|---|
US394007A true US394007A (en) | 1888-12-04 |
Family
ID=2462976
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US394007D Expired - Lifetime US394007A (en) | John pfeil |
Country Status (1)
Country | Link |
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US (1) | US394007A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2929591A (en) * | 1956-12-03 | 1960-03-22 | Gen Motors Corp | Resilient mounting |
US5868383A (en) * | 1997-03-27 | 1999-02-09 | L&P Property Management Company | Multiple rate coil spring assembly |
US20160365785A1 (en) * | 2015-06-15 | 2016-12-15 | AAC Technologies Pte. Ltd. | Spiral spring and linear motor using same |
-
0
- US US394007D patent/US394007A/en not_active Expired - Lifetime
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2929591A (en) * | 1956-12-03 | 1960-03-22 | Gen Motors Corp | Resilient mounting |
US5868383A (en) * | 1997-03-27 | 1999-02-09 | L&P Property Management Company | Multiple rate coil spring assembly |
US20160365785A1 (en) * | 2015-06-15 | 2016-12-15 | AAC Technologies Pte. Ltd. | Spiral spring and linear motor using same |
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