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US29994A - Improvement in treadle-connections for machinery - Google Patents

Improvement in treadle-connections for machinery Download PDF

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Publication number
US29994A
US29994A US29994DA US29994A US 29994 A US29994 A US 29994A US 29994D A US29994D A US 29994DA US 29994 A US29994 A US 29994A
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Prior art keywords
treadle
spring
machinery
connections
improvement
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H21/00Gearings comprising primarily only links or levers, with or without slides
    • F16H21/10Gearings comprising primarily only links or levers, with or without slides all movement being in, or parallel to, a single plane
    • F16H21/16Gearings comprising primarily only links or levers, with or without slides all movement being in, or parallel to, a single plane for interconverting rotary motion and reciprocating motion
    • F16H21/18Crank gearings; Eccentric gearings
    • F16H21/38Crank gearings; Eccentric gearings with means for temporary energy accumulation, e.g. to overcome dead-centre positions
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00Machine element or mechanism
    • Y10T74/18Mechanical movements
    • Y10T74/18056Rotary to or from reciprocating or oscillating
    • Y10T74/18144Overcoming dead center

Definitions

  • My invention is more especially intended to be applied to sewing-machines, but is applicable with the same advantage to other machines worked by treadles.
  • A is the crank-shaft, carrying the ily-wheel B, to which is secured the crank-pin a.
  • C is the treadle, working on the fulcrum I).
  • D is the rocking bar or lever, arranged some distance above the treadle, and moving upon a fulcrum, c.
  • E isa rigid connecting-rod'eonnected by a pin-j oint, cl,.with the treadle, and by another pin-joint, e, with the rocking bar or lever D.
  • F is another connecting-rod, having at or near its upper end a hole or box to iitthe crank-pin a, and having its lower end connected by a curved spring, G, of the bow kind, with the rocking bar or lever D, the said spring having a rigid attachment both to the said rocking bar and to the rod F.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sewing Machines And Sewing (AREA)

Description

UNITED STATES PATENT OFFICE.
ALFRED A. RAYMOND, OF SALEM, MASSACHUSETTS.
IMPROVEMENT IN TREADLE-CONNECTIONS `FOR MACHINERY.
Specification forming part of Letters Patent No, 29,994, dated September' 11, 1860.
To all whom, it may concern:
Be it known that I, ALFRED A. RAYMOND, of Salem, in the countyoi' Essex and State of Massachusetts, have invented a new and useful Improvement in Treadle-Connections for Machinery; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawing, which represents a side view of my invention.
My invention is more especially intended to be applied to sewing-machines, but is applicable with the same advantage to other machines worked by treadles.
It consists in a novel connection of a spring, a rocking bar or lever, and two connectingrods, for transmitting motion from a treadle to its crank, whereby the crank is caused to be helped past its centers when in motion, thus rendering the operation of treading less laborious, and is prevented stopping on the centers, thus obviating all difficulty in starting it.
To enable others to make and use my invention, I will proceed to describe its construction and operation.
A is the crank-shaft, carrying the ily-wheel B, to which is secured the crank-pin a. C is the treadle, working on the fulcrum I). D is the rocking bar or lever, arranged some distance above the treadle, and moving upon a fulcrum, c. E isa rigid connecting-rod'eonnected by a pin-j oint, cl,.with the treadle, and by another pin-joint, e, with the rocking bar or lever D. F is another connecting-rod, having at or near its upper end a hole or box to iitthe crank-pin a, and having its lower end connected by a curved spring, G, of the bow kind, with the rocking bar or lever D, the said spring having a rigid attachment both to the said rocking bar and to the rod F.
bar D is constantly changing, and in consequence the curvature of the spring G is constantly varying, and the said spring can only be -in its normal condition at two nearly-opposite points in the revolution of the crankpin. rlhe fulcrum c should be so adjusted relatively to the shaft A and the curvature of the spring that the normal condition of the spring occurs just after the crank-pin has passed its centers, and hence the adjustment will depend upon the desired direction of the revolution. Vith such adjustment the spring `G in approaching either center is so strained that as soon as it arrives very near or at the center the elastic force thus developed tends to throw it past. In the example represented the parts are arranged to produce the rotary motion in the direction ofthe arrow shown near the wheel.
I do not claim, broadly, the employment, in a treadle-connection, of a spring so applied as to help the crank past the centers; but
Vhat I claim as my invention, and desire to secure by Letters Patent, is
The combination, with the treadl'e and crank-pin, of the rod E, rocking bar or lever D, spring G, and rod F, the whole applied and operating substantially as and for the purpose herein set forth.
ALFRED A. RAYMOND.
VVitnesses:
Tnos. S. JnwErr, Giras. E. SYMoNDs.
US29994D Improvement in treadle-connections for machinery Expired - Lifetime US29994A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100249148A1 (en) * 2007-03-13 2010-09-30 Kowa Company, Ltd. Novel pyrimidine compounds having benzyl (heterocyclic methyl) amine structure and medicament comprising the same

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100249148A1 (en) * 2007-03-13 2010-09-30 Kowa Company, Ltd. Novel pyrimidine compounds having benzyl (heterocyclic methyl) amine structure and medicament comprising the same

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