US3214996A - Cam assembly - Google Patents

Cam assembly Download PDF

Info

Publication number
US3214996A
US3214996A US279436A US27943663A US3214996A US 3214996 A US3214996 A US 3214996A US 279436 A US279436 A US 279436A US 27943663 A US27943663 A US 27943663A US 3214996 A US3214996 A US 3214996A
Authority
US
United States
Prior art keywords
bushing
cams
retaining ring
key
shoulder
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
Application number
US279436A
Other languages
English (en)
Inventor
Bono Luigi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Necchi SpA
Original Assignee
Necchi SpA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Necchi SpA filed Critical Necchi SpA
Application granted granted Critical
Publication of US3214996A publication Critical patent/US3214996A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B19/00—Programme-controlled sewing machines
    • 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
    • F16H—GEARING
    • F16H53/00—Cams or cam-followers, e.g. rollers for gearing mechanisms
    • F16H53/02—Single-track cams for single-revolution cycles; Camshafts with such cams
    • F16H53/04—Adjustable cams
    • 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
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B2200/00—Constructional details of connections not covered for in other groups of this subclass
    • F16B2200/40—Clamping arrangements where clamping parts are received in recesses of elements to be connected
    • F16B2200/406—Clamping parts being collars, bushings or wedges
    • 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
    • Y10T403/00—Joints and connections
    • Y10T403/33—Transverse rod to spaced plate surfaces
    • 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
    • Y10T403/00—Joints and connections
    • Y10T403/70—Interfitted members
    • Y10T403/7098—Non-circular rod section is joint component
    • 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
    • Y10T74/2101—Cams
    • Y10T74/2102—Adjustable

Definitions

  • Modern sewing machines are provided with control cams to effect either the semi-automatic operation or the automatic operation thereof.
  • a sewing machine is provided with a plurality of such control cams and the control cams are positioned in the sewing machine in accordance with the desired type and pattern of stitching to be accomplished.
  • This invention has as a primary object the provision of a support for control cams on which the control cams may be readily positioned and from which the control cams may be readily removed whereby the replacement of control cams may be readily accomplished.
  • Another object of this invention is to provide a novel support for the feeding control cams of a sewing machine, the support being provided with a retaining ring which, in one position, prevents the ready replacement of control cams, and in a second position securely holds the control cams in place.
  • th support is provided with an axial key adapted to engage a keyway of the interchangeable cams and carries a retaining ring having a similar key portion, the retaining ring being freely rotatable on the support in such a manner that when the key and key portion are aligned, the application or removal of the control cams is possible while otherwise the control cams are locked between the key portion of the retaining ring and a shoulder on the support.
  • FIGURE 1 is a perspective View of the control cam support and shows generally the details thereof in a position for the reception of cams.
  • FIGURE 2 is a perspective view similar to FIGURE 1 and shows the support with control cams positioned thereon and locked in place, portions of the control cams being broken away and shown in section in order to clearly illustrate the relationship of the control cams to the support.
  • FIGURE 3 is an exploded perspective View of the support in its disassembled condition and shows associated therewith a drive shaft for the support and the control cams to be positioned on the support.
  • the support for the interchangeable cams is formed of a bushing, generally referred to by the numeral 1.
  • the bushing 1 has an axial hole extending up through the lower portion thereof and terminating at the top of the bushing in a rectangular slot 2.
  • the bushing 1 is received over an end of a drive shaft 3 which terminates at its upper end in a key 4.
  • the key 4 is received within the rectangular slot 2 to drivingly connect the bushing 1 to the shaft 3.
  • the bushing 1 is provided at its lower end with a shoulder 5 and above the shoulder 5, the bushing has a cylindrical surface 6.
  • a pair of axially extending keys 7 and 3,214,996 Patented Nov.-2, 1965 8 project from the surface 6 in diametrically opposite relations.
  • the cylindrical surface 6 terminates short of the upper end of the bushing 1 and the upper portion of the bushing 1 includes a cylindrical surface 9 of a reduced cross section as compared to the cylindrical section 6.
  • a retaining ring 10 is mounted on the cylindrical surface 9 and is freely rotatable with respect to the bushing 1.
  • the retaining ring 10 has an outer cylindrical surface which is of the same diameter as the cylindrical surface 6 and which is aligned with the cylindrical surface 6 when the retaining ring 10 is mounted on the bushing 1.
  • the retaining ring 10 is retained on the bushing 1 by means of a resilient retainer 11.
  • the retainer 11 is formed of a resilient wire and includes a generally C- shaped central portion 20 and a pair of outer arcuate wings 21 'which are axially displaced from the C- shaped portion 20.
  • the extreme upper part of the bushing 1 is provided with a circumferential groove 12 in which the C-shaped portion 20 of the retainer 11 is received.
  • the upper end of the retaining ring 10 is recessed, as at 22, to receive the wings 21 of the retainer 11. It will be readily apparent that the retainer 11 elastically opposes axial displacement of the retaining ring along the bushing 1.
  • the retaining ring 10 carries a pair of key portions 13 and 14 which are in diametrical opposite relation and which project from the outer surface of the retaining ring 10.
  • the key portions 13 and 14 correspond generally to the keys 7 and 8 and terminate at their lower ends in projecting detents 15.
  • the upper ends of the keys 7 and 8 are of a cross section complementary to the detents 15 to define sockets 16 in which the detents 15 may seat.
  • FIGURES 2 and 3 A plurality of interchangeable cams 17 are shown in FIGURES 2 and 3.
  • Each of the cams 17 is of a conventional construction and has a central opening therethrough for receiving the bushing 1.
  • each of the earns 17 is provided with a pair of diametrically opposite keyways 18 for engagement over the keys 7 and 8.
  • each cam 17 is provided with a central portion 19 of a slightly greater thickness.
  • FIGURE 1 it will be seen that when the retaining ring 10 is recessed at an end so that the key portions 13 and 14 thereof are aligned with the keys 7 and 8, the key portions 13 and 14 are interlocked with the keys 7 and 8 so as to retain the retaining ring 10 in this position. At this time the key portions 13 and 14 form extensions of the keys 7 and 8, respectively.
  • the retaining ring 10 is retained in this position, it is possible to freely position earns 17 on the bushing 1 or to remove the cams therefrom.
  • the particular bushing illustrated in the drawings is adapted to receive three cams 17, although the length of the bushing 1 may be varied to accommodate any desired number of cams in accordance with the requirements of the sewing machine.
  • the retaining ring 10 is rotated to a position wherein the key portions 13 and 14 ar out of alignment with the keys 7 and 8, as is shown in FIGURE 2.
  • the detents 15 of the key portions 13 and 14 now rest upon the uppermost cam 17 and serve to resiliently urge the earns 17 towards the shoulder 5 whereby the cams 17 are securely locked on the bushing 1 for rotation therewith.
  • the sewing machine of which other portions thereof have not been illustrated, will be provided with suitable feelers or followers for engaging the cams 17 to control the operation of the sewing machine.
  • This is conventional and not shown in the drawing.
  • the drive shaft 3 is a conventional part of a sewing machine and may be driven in any manner, including through a clutch which has not been shown.
  • a cam holder for cams having keyways therein said cam holder comprising a bushing having a drive shaft receiving bore and a cam retaining shoulder adjacent one end, an axial key on the outer surface of said bushing for interlocking engagement with cams, and a reduced cylindrical portion remote from said shoulder, and a retaining ring rotatably journalled on said cylindrical portion, said retaining ring having an outer diameter equal to the outer diameter of said bushing for the passage of cams thereover and a key portion for locking cams on said bushing.
  • a replaceable cam assembly for a sewing machine comprising a bushing having a drive shaft receiving bore and a cam retaining shoulder at one end, an axial external key on said bushing, a plurality of interchangeable cams telescoped over said bushing and having keyways receiving said key, said cams being seated on said shoulder, said bushing having a reduced cylindrical portion adjacent said cams remote from said shoulder, a retaining ring rotatably journalled on said cylindrical portion, said retaining ring having an outer diameter equal to the outer diameter of the bushing for the passage of cams thereover and having a key portion alignable with said bushing key and normally being misaligned and bearing against said cams, and a resilient retainer carried on the upper end of said bushing and which resiliently biases said retaining ring against said bushing, holding said retaining ring on said bushing with said key portion in pressure contact with an adjacent one of said cams.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
US279436A 1962-05-16 1963-05-10 Cam assembly Expired - Lifetime US3214996A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT969562 1962-05-16

Publications (1)

Publication Number Publication Date
US3214996A true US3214996A (en) 1965-11-02

Family

ID=11133091

Family Applications (1)

Application Number Title Priority Date Filing Date
US279436A Expired - Lifetime US3214996A (en) 1962-05-16 1963-05-10 Cam assembly

Country Status (5)

Country Link
US (1) US3214996A (en, 2012)
BE (1) BE631330A (en, 2012)
CH (1) CH392225A (en, 2012)
DE (1) DE1198180B (en, 2012)
GB (1) GB1025226A (en, 2012)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3585876A (en) * 1969-05-26 1971-06-22 Singer Co Fancy stitch zigzag sewing machines
US3656369A (en) * 1971-01-06 1972-04-18 Singer Co Replaceable pattern cam for sewing machines
US4091486A (en) * 1976-02-20 1978-05-30 Kalt Manufacturing Company Punch knock-out mechanism for header
US4178863A (en) * 1978-12-20 1979-12-18 The Singer Company Feed cam rephasing device
US4664290A (en) * 1985-02-25 1987-05-12 Deere & Company Method and apparatus for precise positioning of a seed disk in a seed meter
US4858835A (en) * 1987-11-26 1989-08-22 Axis S.P.A. Equipment for the actuation of needles for the realization of electric motors field windings
US20080035355A1 (en) * 2006-08-08 2008-02-14 First Products, Inc. Turf slicer with vertical oscillator

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3807329A (en) * 1972-11-29 1974-04-30 Singer Co Integrated sewing machine controls
IT8422251V0 (it) * 1984-06-12 1984-06-12 Singer Stabilimento Ind Dispositivo di bloccaggio per camme estraibili di comando per macchine da cucire.

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2999471A (en) * 1956-10-09 1961-09-12 Pfaff Ag G M Adjustable guiding cam mechanism

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3034462A (en) * 1959-11-04 1962-05-15 Koyo Seiko Company Ltd Ornamental stitch sewing machine
CH385609A (it) * 1961-01-26 1964-12-15 Necchi Spa Macchina per cucire a zig-zag con dispositivo di comando dell'esecuzione di motivi di cucitura

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2999471A (en) * 1956-10-09 1961-09-12 Pfaff Ag G M Adjustable guiding cam mechanism

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3585876A (en) * 1969-05-26 1971-06-22 Singer Co Fancy stitch zigzag sewing machines
US3656369A (en) * 1971-01-06 1972-04-18 Singer Co Replaceable pattern cam for sewing machines
US4091486A (en) * 1976-02-20 1978-05-30 Kalt Manufacturing Company Punch knock-out mechanism for header
US4178863A (en) * 1978-12-20 1979-12-18 The Singer Company Feed cam rephasing device
US4664290A (en) * 1985-02-25 1987-05-12 Deere & Company Method and apparatus for precise positioning of a seed disk in a seed meter
US4858835A (en) * 1987-11-26 1989-08-22 Axis S.P.A. Equipment for the actuation of needles for the realization of electric motors field windings
US20080035355A1 (en) * 2006-08-08 2008-02-14 First Products, Inc. Turf slicer with vertical oscillator
US7677324B2 (en) * 2006-08-08 2010-03-16 First Products, Inc. Turf slicer with vertical oscillator

Also Published As

Publication number Publication date
CH392225A (it) 1965-05-15
GB1025226A (en) 1966-04-06
DE1198180B (de) 1965-08-05
BE631330A (en, 2012) 1900-01-01

Similar Documents

Publication Publication Date Title
US3214996A (en) Cam assembly
US2731273A (en) Tool holders
US2741907A (en) Locksmithing tool
US3988911A (en) Cylinder lock
US5934120A (en) Lock with a resettable combination
US7647798B1 (en) Lock having variably-spaced side pins
US3667264A (en) Lock core
US3963361A (en) Shaft attachment assembly
EP0297929B1 (en) Pin-tumbler lock
US4191036A (en) Axial split-pin tumbler-type lock mechanism and key therefor
US3003773A (en) Coupling assembly with positive lock
US2629615A (en) Removable guide pin
US5110240A (en) Apparatus for coupling tool holders
US3344761A (en) Screwless needle-clamps
US4532784A (en) Combination lock
DE2640767A1 (de) Werkzeughalter an einer handwerkzeugmaschine
US3744286A (en) Tubular key
US2784573A (en) Universal joints and adjustments
US3022099A (en) Adjustable coupling
US4708540A (en) Wire lock liner
US3886780A (en) Method of making a tubular key construction
US20200238395A1 (en) Tool holder for a machine tool
SU1087269A1 (ru) Устройство дл закреплени инструмента
US3016031A (en) Needle clamps for sewing machines
US3897691A (en) Gear changing mechanism