US657540A - Work-clamp for buttonhole-sewing machines. - Google Patents

Work-clamp for buttonhole-sewing machines. Download PDF

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Publication number
US657540A
US657540A US736365A US1899736365A US657540A US 657540 A US657540 A US 657540A US 736365 A US736365 A US 736365A US 1899736365 A US1899736365 A US 1899736365A US 657540 A US657540 A US 657540A
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United States
Prior art keywords
clamp
work
buttonhole
sewing machines
lever
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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
US736365A
Inventor
James T Hogan
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.)
National Machine Co Inc
Original Assignee
National Machine Co Inc
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
Priority claimed from US64085797A external-priority patent/US649870A/en
Application filed by National Machine Co Inc filed Critical National Machine Co Inc
Priority to US736365A priority Critical patent/US657540A/en
Application granted granted Critical
Publication of US657540A publication Critical patent/US657540A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B3/00—Sewing apparatus or machines with mechanism for lateral movement of the needle or the work or both for making ornamental pattern seams, for sewing buttonholes, for reinforcing openings, or for fastening articles, e.g. buttons, by sewing
    • D05B3/06—Sewing apparatus or machines with mechanism for lateral movement of the needle or the work or both for making ornamental pattern seams, for sewing buttonholes, for reinforcing openings, or for fastening articles, e.g. buttons, by sewing for sewing buttonholes

Definitions

  • Figure 1 is a vertical section taken lengthwise of the work-clamp top and bottom plates.
  • Fig. 2 is an inverted plan or bottom view of the top plate of the work-clamp.
  • Fig. 3 is a top view of the bottom plate of the work-clamp.
  • Fig. 4 is a view similar to Fig. 1, illustratingaslight modification in the construction of the bottom plate of the work-clamp. 1
  • the work-clamp M comprisesatop plate'm', having a shank portion m and an enlarged end portion m in which is formed a large rectangular opening m
  • two serrated bars m each being at ornear its ends attached to or formed integral with resilient arms m", which are attached to the under side of the end portion m of the top plate of the clamp.
  • Ashereshowlnthearmsm areformed integral with the cross-bars Screws m serve to fasten the arms m to the top plate of the clamp.
  • the arms m of each bar a cross the other bar 001 and their resilience is such as to move the serrated bars downwardly with reference to the top plate of the clamp.
  • the bottom plate of the clamp has a shank portion m and an enlarged end portion m.
  • a recess m which is made in the shape of an arc of a cylinder and is provided along its central line with a slot on.
  • the serrated bars on coact with the bottom of this recess close to the sides of its slot..
  • the recess m instead of being made in the shape of an arc of a cylinder, may be provided with a shoulder on for coacting with the serrated bars m to make a more positive engagementof the fabric with the clamp.
  • the shank portion of the bottom plate is fastened to a bar 011 which bar may be attached to a. suitable feed mechanism, such as shown and described in my application, Serial No. 640,857, filed June 15, 1897, of which the present application is a division.
  • a lever 077 To the bar m is hinged a lever 077, which at its free end carries the shank portion m of the top plate m.
  • a stud 'm rises from the bar 011 through a hole in the lever m and has pivoted to its upper end a cam-lever m which serves to adjust the lever m, so that it'will depress the top plateof the Work-clam p or per- I [hit it to rise.
  • a spring T surrounding the stud m and hearing at itsupper end against the lever m raises the latter and the plate m when the cam-lever m is moved to release the lever m.
  • a sewing-machine work-clamp comprising a plate having an opening therein, two serrated bars crossing such opening, each of said serrated bars having at the ends resilient supporting-arms extending across the line of the other serrated bar, substantially as speci-- fied.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)

Description

No. 657,540., Patanted Sept. u, I900.
.L-T. HOGAN.
WORK CLAMP FOR BUTTONHOLESEWING MACHINES. (Applicsfloli filed Nov. 9, 1899.
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UNITED STAT S PATENT CFFICE.
JAMES T. HOGAN, OF JERSEY OITY, NEW JERSEY, ASSIGNOR TO THE NATIONAL MACHINE COMPANY, OF NEW YORK;
WORK-CLAMP VFORBUTTO-NHOLE-SEWING MACHINES.
SPECIFICATION forming part of Letters Patent No. 657,540, dated September 11, 1900.
Original application filed June 15,1897, Serial No. 540,857. Divided and this application filed November 9, 1899. Serial No, S 736,365. on model-J To all whom it may concern: 9
Be it known that I, JAMES T. HOGAN, a citizen of the United States, residing in Jersey City, in the county of Hudson and State of New Jersey, have invented a new and useful WVork-Glamp for Sewing-Machines, of which the following is a specification.
I will describe a work-clam p embodying my invention and then point out the novel features thereof in a claim.
In the accompanying drawings, which form part of my application, Figure 1 is a vertical section taken lengthwise of the work-clamp top and bottom plates. Fig. 2 is an inverted plan or bottom view of the top plate of the work-clamp. Fig. 3 is a top view of the bottom plate of the work-clamp. Fig. 4 is a view similar to Fig. 1, illustratingaslight modification in the construction of the bottom plate of the work-clamp. 1
Similar letters of reference designate corresponding parts in all of the figures.
The work-clamp M comprisesatop plate'm', having a shank portion m and an enlarged end portion m in which is formed a large rectangular opening m On the under side of the end portion m are fastened two serrated bars m each being at ornear its ends attached to or formed integral with resilient arms m", which are attached to the under side of the end portion m of the top plate of the clamp. Ashereshowlnthearmsm areformed integral with the cross-bars Screws m serve to fasten the arms m to the top plate of the clamp. The arms m of each bar a cross the other bar 001 and their resilience is such as to move the serrated bars downwardly with reference to the top plate of the clamp. Hence when the serrated bars m eetwithany considerable resistance the armsm willbe deflected upwardly,and thus will impart to. the serrated bars a movement away from each other. This movement will have the eifect. of spreading the fabric in the clamp. The large rectangular opening in thetop plate of the clamp givesthe operator an opportunity to see the serrated .bars and the fabric beneath them.
name to this specification in the two subscribing witnesses.
The bottom plate of the clamp has a shank portion m and an enlarged end portion m. In the top of the latter is a recess m which is made in the shape of an arc of a cylinder and is provided along its central line with a slot on. The serrated bars on coact with the bottom of this recess close to the sides of its slot.. The recess m instead of being made in the shape of an arc of a cylinder, may be provided with a shoulder on for coacting with the serrated bars m to make a more positive engagementof the fabric with the clamp.
The shank portion of the bottom plate is fastened to a bar 011 which bar may be attached to a. suitable feed mechanism, such as shown and described in my application, Serial No. 640,857, filed June 15, 1897, of which the present application is a division. To the bar m is hinged a lever 077, which at its free end carries the shank portion m of the top plate m. A stud 'm rises from the bar 011 through a hole in the lever m and has pivoted to its upper end a cam-lever m which serves to adjust the lever m, so that it'will depress the top plateof the Work-clam p or per- I [hit it to rise. A spring T, surrounding the stud m and hearing at itsupper end against the lever m raises the latter and the plate m when the cam-lever m is moved to release the lever m. i
What I clairmand desire to secure by Letters Patent, is
A sewing-machine work-clamp comprising a plate having an opening therein, two serrated bars crossing such opening, each of said serrated bars having at the ends resilient supporting-arms extending across the line of the other serrated bar, substantially as speci-- fied. i Y In testimony whereof I have signed my presence of JAMES? -T. HOGAN.
Witnesses: V GEO. ErORUsE, CHARLES S. JONES; v
US736365A 1897-06-15 1899-11-09 Work-clamp for buttonhole-sewing machines. Expired - Lifetime US657540A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US736365A US657540A (en) 1897-06-15 1899-11-09 Work-clamp for buttonhole-sewing machines.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US64085797A US649870A (en) 1897-06-15 1897-06-15 Buttonhole sewing and cutting machine.
US736365A US657540A (en) 1897-06-15 1899-11-09 Work-clamp for buttonhole-sewing machines.

Publications (1)

Publication Number Publication Date
US657540A true US657540A (en) 1900-09-11

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Family Applications (1)

Application Number Title Priority Date Filing Date
US736365A Expired - Lifetime US657540A (en) 1897-06-15 1899-11-09 Work-clamp for buttonhole-sewing machines.

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