US115073A - Improvement in auxiliary springs for treadles - Google Patents

Improvement in auxiliary springs for treadles Download PDF

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Publication number
US115073A
US115073A US115073DA US115073A US 115073 A US115073 A US 115073A US 115073D A US115073D A US 115073DA US 115073 A US115073 A US 115073A
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Prior art keywords
improvement
treadles
crank
auxiliary springs
spring
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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

Description

H. LULL. lmprove'ment in Auxiliary Springs for Tre'adles. No. 115,073.
Patented May 23, i871.
- @nvmtur: v gtturuzgx.
Wxtmm PATENT Drrrou HARVEY LULL, OF HOBOKEN, NEW JERSEY.
IMPROVEMENT IN AUXILIARY SPRINGS FOR TREADLES.
Specification forming part of Letters Patent No. 115,073, dated May 23, 1871.
To all whom it may concern:
Be it known that I, HARVEY LULL, of Hoboken, in the county of Hudson and State of New Jersey, have invented a new and useful Improvement in Auxiliary Springs; and I do hereby declare that the following is a full, clear, and exact description thereof, which will enable others skilled in the art to make and use the same, reference being had to the accompanyin g drawing forming part of this specification.
My invention consists in improving that class of hand or foot crank mechanisms which employs a spring to store up the power and to take the crank over the dead-point.
The accompanying drawing illustrates my invention.
Similar letters of reference indicate corresponding parts.
A is the crank fly-wheel. B is the pitman. O is the bar, to which power may be applied for revolving the wheel and shaft, to which the wheel is attached. In the application of this device to a sewing-machine this bar would represent the treadle. Dis the spring, which, in this example of my invention, is a spiral spring; but I do not confine myself to any I particular kind of spring-a flat or a bow spring may be applied. A weight may, perhaps, be used to good advantage for assisting the crank as proposed. This spiral spring is confined in the tube E,around the rod I The tube E is pivoted at the point G, and the rod F ispivoted to the end of the pitman, as seen at H. The rod is thus given the required play to allow the crank to revolve, and is so arranged in regard to the position of the crank that the spring is made to act upon the crank while the latter is passing the centers and so that the crank will not stop on a dead-center.
When applied to a sewing-machine both hands of the operator are left free, the usual handling of the fly-wheel to throw the crank off the center and start the machine not being necessary.
I am aware of patent 922, granted some years ago, and desire distinctly to disclaim all that is set forth therein; but
What I do esteem to be new, as an improvement thereon, and desire to protect by Letters Patent, is-
The pivoted tube E and spring D therein, combined with arm F and pitman B, pivoted together at H, all arranged as and for the purpose specified.
. HARVEY LULL,
Witnesses GEo. W. MABEE, ALEX. F. ROBERTS.
US115073D Improvement in auxiliary springs for treadles Expired - Lifetime US115073A (en)

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US115073A true US115073A (en) 1871-05-23

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2480273A (en) * 1944-11-13 1949-08-30 Gerda Tisell Crank motion for steam engines and the like
US2506241A (en) * 1946-01-16 1950-05-02 Constance Karries Sendoykas Mechanical movement
US3139761A (en) * 1962-07-31 1964-07-07 Electronic Specialty Co Quick reversing mechanism

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2480273A (en) * 1944-11-13 1949-08-30 Gerda Tisell Crank motion for steam engines and the like
US2506241A (en) * 1946-01-16 1950-05-02 Constance Karries Sendoykas Mechanical movement
US3139761A (en) * 1962-07-31 1964-07-07 Electronic Specialty Co Quick reversing mechanism

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