US194157A - Improvement in spiral springs - Google Patents

Improvement in spiral springs Download PDF

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US194157A
US194157A US194157DA US194157A US 194157 A US194157 A US 194157A US 194157D A US194157D A US 194157DA US 194157 A US194157 A US 194157A
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improvement
bar
spiral springs
spiral
flattened
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    • 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 object being to so dispose the metal of which the spring is made as to utilize it to the fullest extent, and also to economize space.
  • Fig. 1,A is a spiral spring, made from a bar of steel having a peculiar form, which is fully shown in the enlarged section, Fig. 2.
  • This bar difl'ersfrom a round bar in having its inner surface flattened at B, and having the projecting rounded cornersaat opposite sides of the flattened portion, and in extending the side b, which is opposite the flattened-side B.
  • the idea of the plan on which the bar is made is to bring the vertical diametrical line of a round bar nearer the axis of the spiral.
  • To accomplish thisthe natural method would be to make one side of the bar flat, and add to the diameter of the bar to compensate for the deficiency in material due to flattening the side. object; but it is more efl'ectively accomplished by adding to the bar at the point a a and b, rendering it almond-shaped.
  • the transverse section of the bar has the general form of a triangle having two similar curved sides and a right base, and having all of the corners rounded.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Developing Agents For Electrophotography (AREA)
  • Adornments (AREA)
  • Springs (AREA)

Description

J. LUDLUM. SPIRAL-SPRINGS.
No. 194,157. Patented Aug.14,1877.
[Ky/Z ATTORNEYS.
UNITED STATES PATENT OFFICE.
JAMES LUDLUM, OF POMPTON, NEW JERSEY.
IMPROVEMENT IN SPIRAL SPRINGS.
Specification forming part of Letters Patent No. 194,157, dated August 14, 1877; application filed May 28, 1877.
- into any required relation to the axis of the spiral; .the object being to so dispose the metal of which the spring is made as to utilize it to the fullest extent, and also to economize space.
In Fig. 1,A is a spiral spring, made from a bar of steel having a peculiar form, which is fully shown in the enlarged section, Fig. 2. This bardifl'ersfrom a round bar in having its inner surface flattened at B, and having the projecting rounded cornersaat opposite sides of the flattened portion, and in extending the side b, which is opposite the flattened-side B.
The idea of the plan on which the bar is made is to bring the vertical diametrical line of a round bar nearer the axis of the spiral. To accomplish thisthe natural method would be to make one side of the bar flat, and add to the diameter of the bar to compensate for the deficiency in material due to flattening the side. object; but it is more efl'ectively accomplished by adding to the bar at the point a a and b, rendering it almond-shaped. The transverse section of the bar has the general form of a triangle having two similar curved sides and a right base, and having all of the corners rounded.
Having thus described my invention, I claim as new and desire to secure by Letters Patent- A spiral spring consisting of a coiled steel bar having convex sides and flattened on one of its edges, substantially as shown and described, for the purpose specified.
JAMES LUDL'UM.
Witnesses: I
O. SEDGWICK, ALEX. F. ROBERTS.
This plan partly accomplishes the
US194157D Improvement in spiral springs Expired - Lifetime US194157A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030033285A1 (en) * 1999-02-18 2003-02-13 Neema Jalali Mechanism to efficiently index structured data that provides hierarchical access in a relational database system
US20040060600A1 (en) * 2001-06-19 2004-04-01 Choate Jeremy R. Safety relief valve having a low blow-down value and spring therefore

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030033285A1 (en) * 1999-02-18 2003-02-13 Neema Jalali Mechanism to efficiently index structured data that provides hierarchical access in a relational database system
US20040060600A1 (en) * 2001-06-19 2004-04-01 Choate Jeremy R. Safety relief valve having a low blow-down value and spring therefore
US20060090796A1 (en) * 2001-06-19 2006-05-04 Mercer Valve Company, Inc. Safety relief valve having a low blow-down value and spring therefore
US20080017257A1 (en) * 2001-06-19 2008-01-24 Mercer Valve Company, Inc. Safety relief valve having a low blow-down value and spring therefore
US7337796B2 (en) * 2001-06-19 2008-03-04 Mercer Valve Company, Inc. Safety relief valve having a low blow-down value and spring therefore
US7628169B2 (en) 2001-06-19 2009-12-08 Mercer Valve Company, Inc. Safety relief valve having a low blow-down value and spring therefore
US7744071B2 (en) 2001-06-19 2010-06-29 Mercer Valve Company, Inc. Safety relief valve having a low blow-down value and spring therefore

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