US2732730A - Sernaker - Google Patents

Sernaker Download PDF

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Publication number
US2732730A
US2732730A US2732730DA US2732730A US 2732730 A US2732730 A US 2732730A US 2732730D A US2732730D A US 2732730DA US 2732730 A US2732730 A US 2732730A
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United States
Prior art keywords
pawl
ratchet wheel
pin
spring
sernaker
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Expired - Lifetime
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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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D41/00—Freewheels or freewheel clutches
    • F16D41/12—Freewheels or freewheel clutches with hinged pawl co-operating with teeth, cogs, or the like
    • Y—GENERAL 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/21—Elements
    • Y10T74/2133—Pawls and ratchets
    • Y10T74/2136—Pivoted pawls

Definitions

  • the object of my invention is to provide a unique pawl and ratchet wheel for a flat embroidery machine wherein the take up rollers may be operated individually.
  • the drawing shows a view of a pawl and ratchet wheel embodying my invention.
  • a lifting pawl 20 is adapted to engage a ratchet wheel 22 which is mounted upon a shaft 12.
  • the lifting pawl 20 is pivotally mounted to a lever or link 24.
  • the lifting pawl 20, pivoted to the arm 24 by a pin 25 has an opening at one end to receive a coiled spring 26 made of music wire which presses against a free riding spring pin 28.
  • the pin 28 causes the spring 26 to exert a force against the ratchet wheel 22 so that pawl 20 will engage the ratchet wheel 22.
  • the holding pin 25 has a flat portion on its shaft flat in order that the flat-headed pin 28 will abut the flat surface in order to return to one position, which position is to keep the pawl against the ratchet.
  • a set screw through the link 24 abuts the pin 25 to hold it against the link or lever 24.
  • a pawl and ratchet wheel adapted for an embroidery machine comprising a pawl having an opening therein, teeth on said ratchet wheel, the free end of said pawl being adapted to engage the teeth on said ratchet wheel, a spring in said pawl opening, a spring pin abutting one end of said spring, and a pawl holding pin pivotally mounting said pawl having a fiat portion so that one end of said spring pin abuts against said flat portion of said spring pin in order to hold said pawl against said ratchet wheel.

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

Description

Jan. 31, 1956 c. SERNAKER 2,732,730
I PAWL AND RATCHET WHEEL Filed Jan. 18, 195] INVENTOR.
BY 2 I V62 ATTORNEY.
United States Patent ce PAWL AND RATCHET WHEEL Charles Sernaker, Philadelphia, Pa.
Application January 18, 1951, Serial No. 206,591
1 Claim. (Cl. 74-577) The object of my invention is to provide a unique pawl and ratchet wheel for a flat embroidery machine wherein the take up rollers may be operated individually.
Other objects of my invention are to provide in an embroidery machine, a mechanism of the character described, that is easily and economically produced, which is sturdy in construction and which is highly effective in operation.
With the above and related objects in view, my invention consists in the details of construction and combination of parts as will hereinafter he more fully understood when the following description is read in conjunction with the accompanying drawing, in which:
The drawing shows a view of a pawl and ratchet wheel embodying my invention.
A lifting pawl 20 is adapted to engage a ratchet wheel 22 which is mounted upon a shaft 12. The lifting pawl 20 is pivotally mounted to a lever or link 24.
The lifting pawl 20, pivoted to the arm 24 by a pin 25 has an opening at one end to receive a coiled spring 26 made of music wire which presses against a free riding spring pin 28. The pin 28 causes the spring 26 to exert a force against the ratchet wheel 22 so that pawl 20 will engage the ratchet wheel 22.
2,732,730 Patented Jan. 31, 1956 The holding pin 25 has a flat portion on its shaft flat in order that the flat-headed pin 28 will abut the flat surface in order to return to one position, which position is to keep the pawl against the ratchet.
A set screw through the link 24 abuts the pin 25 to hold it against the link or lever 24.
Although my invention has been described in considerable detail, such description is merely intended as illustrative, rather than limiting, and my invention may be variously embodied, and the scope of the invention is to be determined as claimed.
I claim as my invention:
A pawl and ratchet wheel adapted for an embroidery machine comprising a pawl having an opening therein, teeth on said ratchet wheel, the free end of said pawl being adapted to engage the teeth on said ratchet wheel, a spring in said pawl opening, a spring pin abutting one end of said spring, and a pawl holding pin pivotally mounting said pawl having a fiat portion so that one end of said spring pin abuts against said flat portion of said spring pin in order to hold said pawl against said ratchet wheel.
References Cited in the file of this patent UNITED STATES PATENTS 382,947 Brown May 15, 1888 416,331 Githens Dec. 3, 1889 454,737 Hochreutener June 23, 1891 669,986 Gore Mar. 19, 1901 1,268,243 Groebli June 4, 1918 1,314,735 Derby Sept. 2, 1919 1,772,798 Carlson Aug. 12, 1930 1,818,690 Carlson Aug. 11, 1931 2,253,380 Knowland et a1 Aug. 19, 1941 2,522,897 Rotter Sept. 19, 1950
US2732730D Sernaker Expired - Lifetime US2732730A (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2933580A (en) * 1958-05-06 1960-04-19 Joe Davidson Pivotally balanced members
US3064485A (en) * 1960-08-22 1962-11-20 Mitchell A Hall Cycle starting mechanism
US3144217A (en) * 1957-08-12 1964-08-11 Jr Garfield A Wood Fishing reel
EP0001799A1 (en) * 1977-10-28 1979-05-16 Contraves Ag Locking device for the antenna part of a spacecraft
US4267748A (en) * 1978-10-02 1981-05-19 Rite Hite Corporation Releasable lock mechanism
US20170138305A1 (en) * 2012-04-23 2017-05-18 Safran Electronics & Defense Actuating device for moving a movable cover of a thrust reverser

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US382947A (en) * 1888-05-15 Compound-lever punch
US416331A (en) * 1889-12-03 Pawl and ratchet
US454737A (en) * 1891-06-23 hochbeutener
US669986A (en) * 1900-03-16 1901-03-19 Daniel W Gore Pawl and ratchet.
US1268243A (en) * 1917-05-25 1918-06-04 Joseph A Groebli Embroidering-machine.
US1314735A (en) * 1919-09-02 Planoormi
US1772798A (en) * 1928-11-02 1930-08-12 E Ingraham Co Spring pawl for ratchet mechanisms
US1818690A (en) * 1929-05-15 1931-08-11 E Ingraham Co Pawl for ratchet-mechanisms
US2253380A (en) * 1939-07-25 1941-08-19 Bigelow Sanford Carpet Co Inc Fabric supporting and feeding apparatus
US2522897A (en) * 1947-08-05 1950-09-19 Jack H Rotter Protective cover for telescopic sight lenses

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US382947A (en) * 1888-05-15 Compound-lever punch
US416331A (en) * 1889-12-03 Pawl and ratchet
US454737A (en) * 1891-06-23 hochbeutener
US1314735A (en) * 1919-09-02 Planoormi
US669986A (en) * 1900-03-16 1901-03-19 Daniel W Gore Pawl and ratchet.
US1268243A (en) * 1917-05-25 1918-06-04 Joseph A Groebli Embroidering-machine.
US1772798A (en) * 1928-11-02 1930-08-12 E Ingraham Co Spring pawl for ratchet mechanisms
US1818690A (en) * 1929-05-15 1931-08-11 E Ingraham Co Pawl for ratchet-mechanisms
US2253380A (en) * 1939-07-25 1941-08-19 Bigelow Sanford Carpet Co Inc Fabric supporting and feeding apparatus
US2522897A (en) * 1947-08-05 1950-09-19 Jack H Rotter Protective cover for telescopic sight lenses

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3144217A (en) * 1957-08-12 1964-08-11 Jr Garfield A Wood Fishing reel
US2933580A (en) * 1958-05-06 1960-04-19 Joe Davidson Pivotally balanced members
US3064485A (en) * 1960-08-22 1962-11-20 Mitchell A Hall Cycle starting mechanism
EP0001799A1 (en) * 1977-10-28 1979-05-16 Contraves Ag Locking device for the antenna part of a spacecraft
US4267748A (en) * 1978-10-02 1981-05-19 Rite Hite Corporation Releasable lock mechanism
US20170138305A1 (en) * 2012-04-23 2017-05-18 Safran Electronics & Defense Actuating device for moving a movable cover of a thrust reverser
US10883446B2 (en) * 2012-04-23 2021-01-05 Safran Electronics & Defense Actuating device for moving a movable cover of a thrust reverser

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