US2941489A - Movable thread cutter for electric sewing machines - Google Patents

Movable thread cutter for electric sewing machines Download PDF

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Publication number
US2941489A
US2941489A US644137A US64413757A US2941489A US 2941489 A US2941489 A US 2941489A US 644137 A US644137 A US 644137A US 64413757 A US64413757 A US 64413757A US 2941489 A US2941489 A US 2941489A
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blade
cutter
movable
electric sewing
throat plate
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Expired - Lifetime
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US644137A
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Fischbein Dave
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Fischbein Dave
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    • DTEXTILES; PAPER
    • D05SEWING; EMBROIDERING; TUFTING
    • D05BSEWING
    • D05B65/00Devices for severing the needle or lower thread
    • DTEXTILES; PAPER
    • D05SEWING; EMBROIDERING; TUFTING
    • D05BSEWING
    • D05B73/00Casings
    • D05B73/04Lower casings
    • D05B73/12Slides; Needle plates

Description

June 21, 1960 D. FISCHBEIN 2,941,489

MOVABLE THREAD CUTTER FOR ELECTRIC SEWING MACHINES Filed March 5, 1957 INVENTOR. UulrB Fisuhhuir;

F g. Jun/1r K AT TORNEY United States Patent MOVABLE THREAD CUTTER FOR ELECTRIC SEWING MACHINES Dave Fischbein, 2720 30th Ave. S., Minneapolis, Minn. Filed Mar. 5, 1957, Ser. No. 644,137 3 Claims. (Cl. 112-252) My present invention relates to improvements in electric sewing machines and, more particularly, to a movable thread cutter therefor acting in conjunction with and mounted on the feed dog carrier block and throat plate of the sewing mechanism to facilitate the cutting of the sewing thread as required.

It may be well to state here that this present invention is in the nature of an improvement of the stationary thread cutter as is disclosed in United States Letters Patent No. 2,484,495 issued to me as patentee and assigned to the Dave Fischbein Co. of Minneapolis, Minnesota.

The principal object of this invention is to provide a movable thread or chain stitch cutter that will automatically sever the thread or chain at the end of a given sewing operation.

Another object of this invention is to provide a movable thread or chain stitch cutter wherein the cooperating cutter blades of the cutter assembly are detachably mounted in their respective stations to facilitate the replacement or resharpening thereof.

In the accompanying drawings, which illustrate the invention, like characters indicate like parts throughout the several views Referring to the drawings:

Fig. 1 is a side elevational view partly in plan and partly in section of a portion of the sewing machine diagrammatically showing the feed dog carrier block and slide and its mounted components, the presser foot and the needle, with the invention shown mounted, by heavy solid lines;

Fig. 2 is a rear elevation of the feed dog carrier block and the throat plate showing the invention mounted thereon;

Fig. 3 isa bottom plan view thereof;

Fig. 4 is a perspective view of the invention showing the means for detachably securing the movable blade and mount the one to the other; and

Fig. 5 is a fragmentary bottom plan view of the throat plate showing the mounting of the stationary cutter blade.

For the purpose of this application and in the interest of brevity and clarity, the following components are conventional but pertinent parts of the electric sewing machine disclosed in the above identified United States patent and are named herein to show the relationship of said parts as they affect the instant application, to wit: the reciprocating feed dog carrier block and slide 6, feed dog 7, looper 8, throat plate 9, presser foot 10, and the needle and needle bar assembly 11.

The numeral 12 is directed to a spring steel mounting bracket for a movable cutter blade 13 that is detachably secured thereto to afford means for easy removal thereof for replacement or sharpening of said cutter member, as presently will be described.

The mounting bracket 12 is formed of spring steel to impart a resiliency to the entire movable cutter assembly to thus afford the proper frictional engagement between 2,941,489 Patented June 21, 1960 the movable cutter blade 13 mounted thereon and a stationary cutter blade 14 that is detachably secured for replacement .or sharpening purposes, to the under surface of the throat plate at the rear end marginal edge portion thereof, see Figs. 3 and 4.

The mounting bracket 12 is formed of a single piece of spring steel and comprises a base portion 15 having a pair of longitudinally disposed countersunk screw holes for a pair of attaching screws 16 which have screwthreaded engagement with the base of the feed dog carrier block and slide 6, by which the mount .12 is rigidly but detachably secured to said feed dog carrier block and slide 6, and an upstanding end portion 17 bent at right angles to the base portion. In end elevation, this section 17 of the mounting bracket 12 is laterally offset and notched to provide for necessary clearance and its upper end portion is terminated in a pair of upstanding prongs 18 that afford a mounting station for the movable cutter blade assembly 13, as will presently be described. A secondary spring 19 in the form of an upwardly and outwardly extended arm is rigidly attached to the section 17 of the mounting bracket 12 and is transversely centered between the upstanding prongs 18. This secondary spring is terminated at its outer end portion to form a shoe 20 that rides against the lower surface of the detachable cutter blade 13 to further insure proper frictional engagement between the movable cutter blade 13 and its cooperating stationary blade 14. The detachable cutter blade 13 is also formed of a single piece of mate rial which, after fabrication, is hardened to hold a sharp cutting edge. This detachable member 13 comprises a backing plate 21, a pair of parallel vertically disposed guide rails or channels 22 and the cutting blade section 23 that is formed by bending the material rearwardly at right angles to the rails 22. The outer end portion thereof is finish ground to a substantially semicircular radius and ground and honed to a keen cutting edge. The guide rails or channels 22 have endwise sliding engagement with the prongs .18 and have a relatively tight working fit, the one upon the other.

It will thus be seen that when the guide rails or channels 22 engage the prongs 18 to their full working depth, the shoe 20 forming the cutter end portion of the secondary spring 22, impinges the under surface of the blade section 23 to further maintain proper working tension between the movable blade 13 and the stationary blade 14, the latter of which is rigidly but detachably secured to the under side of the rear end portion of the throat plate 9. This stationary blade 14 is dimensioned to engage with endwise sliding movements at V bed machined in said throat plate 9 in its underside, and a set screw 25 has screw-threaded engagement with the throat plate to rigidly position and hold the blade 14 in proper operational position. Obviously, by removing the set screw and endwise sliding the blade 14 rearwardly in its V bed 24, the blade 14 can be removed and replaced at will. A central longitudinally disposed slot 26 is formed in the sections 21 and 23 of the cutting member 13 to afford a guide having longitudinal engagement with a guide rail 27 on the throat plate 9. I

As has been stated in the objects of this invention, this movable cutter blade assembly takes the place of the heretofore used stationary blade alone, which required the manual cutting of the chaining or thread by drawing said chaining or thread against the sole cutting blade mounted in the throat plate. In using the present invention in conjunction with the sewing operation, when it is desired to cut the chaining or thread, it is only necessary while the machine is in operation, to guide the chaining or thread into engagement with the stationary blade 14 mounted in the throat plate 9 where the same will be easily cut by the cooperating movements of the blades 13 and 14, respectively.

While there are herein disclosed but a limited number of embodiments of the structure, process and product of the invention herein presented, it is possible to produce still other embodiments without departing from the inventive concept herein disclosed, and it is vdesired, there fore, that only such limitations be imposed on the appended claims as are stated herein or required by the prior art.

What I claim is:

1. An automatic movable threadcutter mechanism for electric sewing machines having a throat plate and a reciprocating feed .dog carrier block comprising in combination, a mounting bracket adapted .to be detachably secured to the feed dog carrier blockot an electric sewing machine, a cutter blade reciprocably mounted on said mounting bracket, a stationary cutter blade adapted to be detachably mounted on the throat plate of an electric sewing machine positioned for close working engagement with the reciprocable cutter blade, spring means rigidly mounted on the said mounting bracket to impart tension to the reciprocable cutter blade against the cooperating stationary cutter blade, andpowered means imparting reciprocating motion to the reciprooable cutter blade.

2. An automatic movable thread cutter mechanism for electric sewing machines having a throat plate and a reciprocating feed 10g carrier .block comprising in combination, a mounting bracket adapted to be detachably secured to the reciprocating feed dog carrier block of an electric sewing machine, said mounting bracket having a horizontally disposed base section and a vertically disposed offset blade mounting section, said blade mounting section having a pair of parallel upstanding prongs, a removable cutter blade having a horizontally disposed cutting edge portion, and a pair of parallel spaced integral guide rails or channels having endwise slidable engagement with the said prongs of said mounting bracket, an upwardly and outwardly projected flat spring terminating in a shoe having frictional engagement with the lower horizontal surface of the cutter blade, a stationary cutting blade mounted in the under surface of the throat plate of an electric sewing machine and having cooperating action with the movable cutter "blade, the opposing surfaces of said movable blade and stationary blade being held to close frictional engagement by tension imparted by said spring means on the mounting bracket, and powered means imparting reciprocating motion to the mounting bracket and sl-idable blade.

3. The structure defined in cl m 2, further including detachable means adapted to secure the stationary cutting blade to the throat plate of an electric sewing machine,

and thread-engaging means in said throat plate whereby the thread or chaining is severed automatically while the sewingmachine is in operation by cooperating cutting action of the slidable and stationary blades.

References Cited in the tile of this patent UNITED STATES PATENTS 1,170,349 Seymour Feb. 1, 1916 2,432,545 Sigoda Dec. 16, 1947 2,712,805 Peterson et al. July 12, 1955

US644137A 1957-03-05 1957-03-05 Movable thread cutter for electric sewing machines Expired - Lifetime US2941489A (en)

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Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040092964A1 (en) * 1999-03-04 2004-05-13 Modesitt D. Bruce Articulating suturing device and method
US7462188B2 (en) 2003-09-26 2008-12-09 Abbott Laboratories Device and method for suturing intracardiac defects
US7837696B2 (en) 1999-03-04 2010-11-23 Abbott Laboratories Articulating suturing device and method
US7842048B2 (en) 2006-08-18 2010-11-30 Abbott Laboratories Articulating suture device and method
US7842049B2 (en) 2002-12-31 2010-11-30 Abbott Laboratories Systems for anchoring a medical device in a body lumen
US7846170B2 (en) 1999-03-04 2010-12-07 Abbott Laboratories Articulating suturing device and method
US7883517B2 (en) 2005-08-08 2011-02-08 Abbott Laboratories Vascular suturing device
US8038688B2 (en) 1999-03-04 2011-10-18 Abbott Laboratories Articulating suturing device and method
US8048108B2 (en) 2005-08-24 2011-11-01 Abbott Vascular Inc. Vascular closure methods and apparatuses
US8083754B2 (en) 2005-08-08 2011-12-27 Abbott Laboratories Vascular suturing device with needle capture
US8137364B2 (en) * 2003-09-11 2012-03-20 Abbott Laboratories Articulating suturing device and method
US8267947B2 (en) 2005-08-08 2012-09-18 Abbott Laboratories Vascular suturing device
US8419753B2 (en) 2003-12-23 2013-04-16 Abbott Laboratories Suturing device with split arm and method of suturing tissue
US8574244B2 (en) 2007-06-25 2013-11-05 Abbott Laboratories System for closing a puncture in a vessel wall
US8663252B2 (en) 2010-09-01 2014-03-04 Abbott Cardiovascular Systems, Inc. Suturing devices and methods
US8858573B2 (en) 2012-04-10 2014-10-14 Abbott Cardiovascular Systems, Inc. Apparatus and method for suturing body lumens
US8864778B2 (en) 2012-04-10 2014-10-21 Abbott Cardiovascular Systems, Inc. Apparatus and method for suturing body lumens
US8920442B2 (en) 2005-08-24 2014-12-30 Abbott Vascular Inc. Vascular opening edge eversion methods and apparatuses
US9241707B2 (en) 2012-05-31 2016-01-26 Abbott Cardiovascular Systems, Inc. Systems, methods, and devices for closing holes in body lumens
US9370353B2 (en) 2010-09-01 2016-06-21 Abbott Cardiovascular Systems, Inc. Suturing devices and methods
US9456811B2 (en) 2005-08-24 2016-10-04 Abbott Vascular Inc. Vascular closure methods and apparatuses

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1170349A (en) * 1910-01-06 1916-02-01 Union Special Machine Co Chain-severing mechanism for sewing-machines.
US2432545A (en) * 1942-03-23 1947-12-16 Man Sew Corp Cutting device
US2712805A (en) * 1952-07-22 1955-07-12 Union Special Machine Co Feed-off-the-arm sewing machine

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1170349A (en) * 1910-01-06 1916-02-01 Union Special Machine Co Chain-severing mechanism for sewing-machines.
US2432545A (en) * 1942-03-23 1947-12-16 Man Sew Corp Cutting device
US2712805A (en) * 1952-07-22 1955-07-12 Union Special Machine Co Feed-off-the-arm sewing machine

Cited By (47)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9301747B2 (en) 1999-03-04 2016-04-05 Abbott Laboratories Articulating suturing device and method
US8038688B2 (en) 1999-03-04 2011-10-18 Abbott Laboratories Articulating suturing device and method
US7837696B2 (en) 1999-03-04 2010-11-23 Abbott Laboratories Articulating suturing device and method
US9993237B2 (en) 1999-03-04 2018-06-12 Abbott Laboratories Articulating suturing device and method
US7842047B2 (en) 1999-03-04 2010-11-30 Abbott Laboratories Articulating suturing device and method
US20040092964A1 (en) * 1999-03-04 2004-05-13 Modesitt D. Bruce Articulating suturing device and method
US7846170B2 (en) 1999-03-04 2010-12-07 Abbott Laboratories Articulating suturing device and method
US7850701B2 (en) 1999-03-04 2010-12-14 Abbott Laboratories Articulating suturing device and method
US8172860B2 (en) 1999-03-04 2012-05-08 Abbott Laboratories Articulating suturing device and method
US8323298B2 (en) 1999-03-04 2012-12-04 Abbott Laboratories Articulating suturing device and method
US9282960B2 (en) 1999-03-04 2016-03-15 Abbott Laboratories Articulating suturing device and method
US8048092B2 (en) 1999-03-04 2011-11-01 Abbott Laboratories Articulating suturing device and method
US8663248B2 (en) 1999-03-04 2014-03-04 Abbott Laboratories Articulating suturing device and method
US8057491B2 (en) 1999-03-04 2011-11-15 Abbott Laboratories Articulating suturing device and method
US7842049B2 (en) 2002-12-31 2010-11-30 Abbott Laboratories Systems for anchoring a medical device in a body lumen
US20110071472A1 (en) * 2002-12-31 2011-03-24 Abbott Laboratories Systems for anchoring a medical device in a body lumen
US9889276B2 (en) 2002-12-31 2018-02-13 Abbott Laboratories Systems for anchoring a medical device in a body lumen
US8202281B2 (en) 2002-12-31 2012-06-19 Abbott Laboratories Systems for anchoring a medical device in a body lumen
US8998932B2 (en) 2002-12-31 2015-04-07 Abbott Laboratories Systems for anchoring a medical device in a body lumen
US8137364B2 (en) * 2003-09-11 2012-03-20 Abbott Laboratories Articulating suturing device and method
US10245022B2 (en) 2003-09-26 2019-04-02 Abbott Laboratories Device and method for suturing intracardiac defects
US9155535B2 (en) 2003-09-26 2015-10-13 Abbott Laboratories Device and method for suturing intracardiac defects
US8257368B2 (en) 2003-09-26 2012-09-04 Abbott Laboratories Device for suturing intracardiac defects
US7462188B2 (en) 2003-09-26 2008-12-09 Abbott Laboratories Device and method for suturing intracardiac defects
US8361088B2 (en) 2003-09-26 2013-01-29 Abbott Laboratories Device and method for suturing intracardiac defects
US8211122B2 (en) 2003-09-26 2012-07-03 Abbott Laboratories Device for suturing intracardiac defects
US9375211B2 (en) 2003-12-23 2016-06-28 Abbott Laboratories Suturing device with split arm and method of suturing tissue
US8597309B2 (en) 2003-12-23 2013-12-03 Abbott Laboratories Suturing device with split arm and method of suturing tissue
US8419753B2 (en) 2003-12-23 2013-04-16 Abbott Laboratories Suturing device with split arm and method of suturing tissue
US8267947B2 (en) 2005-08-08 2012-09-18 Abbott Laboratories Vascular suturing device
US7883517B2 (en) 2005-08-08 2011-02-08 Abbott Laboratories Vascular suturing device
US9592038B2 (en) 2005-08-08 2017-03-14 Abbott Laboratories Vascular suturing device
US8313498B2 (en) 2005-08-08 2012-11-20 Abbott Laboratories Vascular suturing device
US8083754B2 (en) 2005-08-08 2011-12-27 Abbott Laboratories Vascular suturing device with needle capture
US8920442B2 (en) 2005-08-24 2014-12-30 Abbott Vascular Inc. Vascular opening edge eversion methods and apparatuses
US9456811B2 (en) 2005-08-24 2016-10-04 Abbott Vascular Inc. Vascular closure methods and apparatuses
US8048108B2 (en) 2005-08-24 2011-11-01 Abbott Vascular Inc. Vascular closure methods and apparatuses
US7842048B2 (en) 2006-08-18 2010-11-30 Abbott Laboratories Articulating suture device and method
US8252008B2 (en) 2006-08-18 2012-08-28 Abbott Laboratories Articulating suturing device and method
US8430893B2 (en) 2006-08-18 2013-04-30 Abbott Laboratories Articulating suturing device and method
US8574244B2 (en) 2007-06-25 2013-11-05 Abbott Laboratories System for closing a puncture in a vessel wall
US9370353B2 (en) 2010-09-01 2016-06-21 Abbott Cardiovascular Systems, Inc. Suturing devices and methods
US8663252B2 (en) 2010-09-01 2014-03-04 Abbott Cardiovascular Systems, Inc. Suturing devices and methods
US8864778B2 (en) 2012-04-10 2014-10-21 Abbott Cardiovascular Systems, Inc. Apparatus and method for suturing body lumens
US8858573B2 (en) 2012-04-10 2014-10-14 Abbott Cardiovascular Systems, Inc. Apparatus and method for suturing body lumens
US10111653B2 (en) 2012-05-31 2018-10-30 Abbott Cardiovascular Systems, Inc. Systems, methods, and devices for closing holes in body lumens
US9241707B2 (en) 2012-05-31 2016-01-26 Abbott Cardiovascular Systems, Inc. Systems, methods, and devices for closing holes in body lumens

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