US1410413A - Needle guard for sewing machines - Google Patents

Needle guard for sewing machines Download PDF

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US1410413A
US1410413A US366282A US36628220A US1410413A US 1410413 A US1410413 A US 1410413A US 366282 A US366282 A US 366282A US 36628220 A US36628220 A US 36628220A US 1410413 A US1410413 A US 1410413A
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needle
guard
presser foot
members
bar
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US366282A
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Seaman Charles
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    • DTEXTILES; PAPER
    • D05SEWING; EMBROIDERING; TUFTING
    • D05BSEWING
    • D05B83/00Guards or like devices for preventing injury to operator

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  • My invention relates to needle guards for sewing machines, and the main object of the invention is effectually to prevent the operator from getting her finger under the needle, and to accomplish this result without interfering-with the usual normal operation of the sewing machine.
  • a more particular object of the invention is to provide such a guard device adapted for use upon different makes and types of sewing machines employing a variety of styles of presser feet, sometimes four or five different styles of presser feet being employed upon a single machine.
  • Figure 1 is a side elevation of the needle guard of my invention in operative position upon the presser foot bar of a sewing machine.
  • the presser foot may be of a different'eonstruction and that it may be secured to the presser foot bar in a different way, as is commonly the case, these matters having nothing whatsoever to do with my invention, other than that the guard device of my invention is adapted to be employed in connection with any style of presser foot.
  • the needle bar such as 2
  • the presser foot 5 is provided with 'a transversely elongated opening or slot 9.
  • the operator will get her finger under the needle more often in zigzag stitching than when the stitching is in a straight line, this probably being due to the greater width of the space or double path in which the needle alternately reciprocates.
  • the needle guard embodying my invention shown in the drawings comprises a supporting member in the form of a split clamp 10 ada ted by means of a screw ll to be clampe firmly upon the presser foot bar 4 above the shank 7 of the presser foot 5.
  • guard members 14 are so shaped and disposed as effectively to exersise their guarding functionwhile freely admitting light and permitting unobscured vision of the work at the stitching point.
  • the'sheet metal guard members 14 extend forward and downward on. substantially a semicircular curve to a point just above and inward from the forwardly projecting upturned toes of the presser foot 5, as is shown in full lines in the drawings. 1
  • each guard member 14 is provided, as shown in Figure 4, with a square upper corner 16, which in this elevated position of the guard member comes into contact. ,with the abutment stop 15, therebyefiectively assuring the' return of the guard members 14 to the guarding position by reason of their own weight;
  • coiled retractile springs 17 areconnected to the pivot lugs 12 at theloweredges and forward ends there of and extend forward and downward and are connected tothecurved guard members 14, the arrangement being such, as is clear from the drawings, particularly from Figure 4, that these springs 17 will be adapted .to assist gravity in 'returningthe guardmembers 14'fron1 the elevated position thereof indicated in Figure 4 to the guarding posi tion shownin full lines in all'of thefi-gures of the "drawings, and these springs '17 will maintain these guardmembers 14 securely at this guarding position and will. prevent their bouncing up or vibrating when the .stantially triangular shape, providing, as
  • a front guard bar a a lower guard bar 6, and a rear guard bar 0, within which is formed a substantially triangular light-achnitting opening 18.
  • the sheet metal guard memhers'14 are bowed laterally. outward, as is clearly shown in Figures2 and3, for thereby providin g a clear view of the work at the stitching point, by the operator.
  • the lower ends of the guard members 14 at the front are curved inward and brought sufliciently close together to prevent the entrance between them of the finger of the operator, and are also brought close enough down-to the work and to the prongs of the presser foot 5 to prevent the entrance ofthe finger of the operator beneath the guard members at this point. It is to be noted that the operator has a clear view jof the work as it moves forward to the stitchguarding position.
  • the ,widened lower ends of the guard members 14 at .the rear thereof (thatisto say, at the lower rear rounded corner formed at the junction of the lower guard bar 7) and the rear guard barc) are spaced apart both for the purpose of providing clear and extendedvision by the operator and. also to provide plenty of room. for the needle bar 2 and needle 3,- particularly, as in the machine shown in the drawings, when the needle bar 2 together with the needle 3carried thereby is adapted to have a lateral throw, as .above mentioned, for making a zigzag "stitch, thisspacing apart of the guard membersat this point being clearly shown in the drawings in Figures 2 and'3.
  • the general shape of the curved sheet metal outwardly bowed guardpmembers 14 is such that the space between these members flares both'upwardly and to the front, thereby providing the operator a better, view. of the work without in any respect interfering with the safety or guarding function of these members, and as will be clear by comparing Fig ures 2 and 3 of the drawings.
  • guard members 14 The shape or contour of the guard members 14 is such, as above described, and as clearly illustrated in the drawings, that these members while eifectively performing their safety or guarding function, at the same time do'not in any manner interfere with the light nor with the vision of the operator, nor in any manner interfere with her operation of the machine, nor annoy her, as has been the case with guard devices heretofore.
  • the large substantially triangular opening 18 is of particular utility in freely admitting light to the work at the stitching point. No matter from what direction the light may come, the construction of the guard members 14 is such that no shadow will be cast upon the work at or adjacent to the stitching point.
  • the needle 8 sometimes is to be threaded from one side, sometimes from the other, sometimes from the front, sometimes from the back, and the independently movable guard mem bers 14: provide for conveniently threading the needle in any way, according to the style of the machine.
  • a free open space is provided between the upper ends of the guard members 14 all the way forward from the adjacent thin band part of the supporting clamp 10, this free space being of importance in view of the fact that in some sewing machines the needle bar, such as 2, may be much closer to the presser foot bar, such as 4, than is the case in the particular machine illustrated in the drawings and also in view of the further fact that in some machines other de vices belonging to the machine occupy this space, such for example, as a thread takeup, sometimes carried by the presser foot bar and extending forward to a point adjacent to the needle.
  • a needle guard for sewing machines comprising a support adapted to be clamped to the presser foot bar, guard members pivoted to said supporting member and adapted to be moved to needle threading and to needle guarding positions, each of said guard members being so constructed as to present an edge which is outwardly and downwardly curved from the pivotal connection between the guard members and the support, and spring tension means tending to resist the movement of the guard members to needle threading position and serving to retain the same normally in needle guarding position.

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

Description

C. SEAMAN.
NEEDLE GUARD FOR SEWINGMACHINES. APPLICATI'ON man mm 16. 1920.
' 1,410,413. Patented Mar. 21, 1922;
INVENTOR MW A TTORNEYS UNITED STATES CHARLES SEAMAN, OF BROOKLYN, NEW YORK.
NEEDLE GUARD FOR SEWING MACHINES.
Specification of Letters Patent.
Patented Mar. 21,1922.
Application filed March 16, 1920. Serial No. 366,282. I
To all whom it may concern:
Be it known that I, CHARLES SEAMAN, a citizen of the United States, and a resident of the borough of Brooklyn, county of Kings, and State of New York, have invented certain new and useful Improvements in Needle Guards for Sewing Machines, of which the following is a specification.
My invention relates to needle guards for sewing machines, and the main object of the invention is effectually to prevent the operator from getting her finger under the needle, and to accomplish this result without interfering-with the usual normal operation of the sewing machine. Heretofore, so far as I am aware, or have found in an extensive factory experience, no needle guard of a practical nature has been proposed or has appeared upon the market. A more particular object of the invention is to provide such a guard device adapted for use upon different makes and types of sewing machines employing a variety of styles of presser feet, sometimes four or five different styles of presser feet being employed upon a single machine. Other objects of the invention are to provide unobstructed vision and plenty of lighten the work, together with the effective guarding of the needle against the possibility of the finger of the operator getting in its path. Other objects are that the guard device be independent of the presser foot, to provide that the needleguarding members may be moved away from their needle-guarding position for access to the needle, but at the same time assuring their automatic return to the guarding position so as to prevent the possibility of the needle being left unguarded. Other objects and advantages of my invention will hereinafter appear. I
My invention includes features of construction and combinations of parts as will appear from the following description.
I shall now describe the needle guard embodying my invention illustrated in the accompanying drawings and shall thereafter point out my invention in the appended claim.
Figure 1 is a side elevation of the needle guard of my invention in operative position upon the presser foot bar of a sewing machine.
although other types are in use, and comprises a head 1, a needle bar 2, a needle 3, a presser foot bar 4 and a presser foot 5 pivoted by means of a pivot pin 6 upon the lower end of a fiat presser foot shank 7, the upper-end part of which is removably secured in the bifurcated lower end of the pressure foot bar 4: by means of a retaining screw 8. It IS understood of course that the presser foot may be of a different'eonstruction and that it may be secured to the presser foot bar in a different way, as is commonly the case, these matters having nothing whatsoever to do with my invention, other than that the guard device of my invention is adapted to be employed in connection with any style of presser foot. And also it is to be understood that the needle bar, such as 2, may be spaced more or less from the presser foot bar 4 and that either a single needle, as shown, or a plurality of needles, as is well known in the art, may be employed. The particular sewing machine shown in the drawings is adapted for either straight or zigzag stitching,and therefore, to provide for the lateral movement or throw of the needle in zigzag stitching, the presser foot 5 is provided with 'a transversely elongated opening or slot 9. In practice it has been found that the operator will get her finger under the needle more often in zigzag stitching than when the stitching is in a straight line, this probably being due to the greater width of the space or double path in which the needle alternately reciprocates.
The needle guard embodying my invention shown in the drawings comprises a supporting member in the form of a split clamp 10 ada ted by means of a screw ll to be clampe firmly upon the presser foot bar 4 above the shank 7 of the presser foot 5. The
supporting clamp 10 at the front thereofis provided with projecting lugs 12, to which are loosely pivoted by means of rivets 13, the upper ends of a pair of sheet metal guard members 14 for free pivotal movement upon the pivots 13. Asa feature of my invention these guard members 14 are so shaped and disposed as effectively to exersise their guarding functionwhile freely admitting light and permitting unobscured vision of the work at the stitching point. Along their forward edges the'sheet metal guard members 14 extend forward and downward on. substantially a semicircular curve to a point just above and inward from the forwardly projecting upturned toes of the presser foot 5, as is shown in full lines in the drawings. 1
This is the operative or guarding position of the guard members 14, and they are prevented from dropping belowthis position into contact with the presser foot 5 or into contact withthe work which moves beneath the presser foot, by means .of flange lilre abutment projections 15 formed iupon-the inner sides adjacent to the lower edges of the respective pivot lugs; 12 of the supporting clamp 10, as shown in Figure 4. When a guard member 14 is raised,'as shown in broken'lines in Figure 4, for the purpose of gaining access tothe needle for threading the needle or for changing needles, this guard member 14 is prevented from being turned over too far towards the back, in which case it might remain in that position. The upper-end of each guard member 14is provided, as shown in Figure 4, with a square upper corner 16, which in this elevated position of the guard member comes into contact. ,with the abutment stop 15, therebyefiectively assuring the' return of the guard members 14 to the guarding position by reason of their own weight;
F or further assuringthe return and the maintaining of the guard members 14 at the guarding position and effectively-to prevent their up and down jumping or vibratory movement, which otherwise would take -place owing to the vibration of the sewing machine in operation, coiled retractile springs 17 areconnected to the pivot lugs 12 at theloweredges and forward ends there of and extend forward and downward and are connected tothecurved guard members 14, the arrangement being such, as is clear from the drawings, particularly from Figure 4, that these springs 17 will be adapted .to assist gravity in 'returningthe guardmembers 14'fron1 the elevated position thereof indicated in Figure 4 to the guarding posi tion shownin full lines in all'of thefi-gures of the "drawings, and these springs '17 will maintain these guardmembers 14 securely at this guarding position and will. prevent their bouncing up or vibrating when the .stantially triangular shape, providing, as
shown in the drawings, a front guard bar a, a lower guard bar 6, and a rear guard bar 0, within which is formed a substantially triangular light-achnitting opening 18. 'Be tween their ends or at intermediate points thereof, the sheet metal guard memhers'14 are bowed laterally. outward, as is clearly shown in Figures2 and3, for thereby providin g a clear view of the work at the stitching point, by the operator. The lower ends of the guard members 14 at the front (that is, at the rounded corner formed by the guard bars a and b) are curved inward and brought sufliciently close together to prevent the entrance between them of the finger of the operator, and are also brought close enough down-to the work and to the prongs of the presser foot 5 to prevent the entrance ofthe finger of the operator beneath the guard members at this point. It is to be noted that the operator has a clear view jof the work as it moves forward to the stitchguarding position.
. The ,widened lower ends of the guard members 14 at .the rear thereof (thatisto say, at the lower rear rounded corner formed at the junction of the lower guard bar 7) and the rear guard barc) are spaced apart both for the purpose of providing clear and extendedvision by the operator and. also to provide plenty of room. for the needle bar 2 and needle 3,- particularly, as in the machine shown in the drawings, when the needle bar 2 together with the needle 3carried thereby is adapted to have a lateral throw, as .above mentioned, for making a zigzag "stitch, thisspacing apart of the guard membersat this point being clearly shown in the drawings in Figures 2 and'3. The general shape of the curved sheet metal outwardly bowed guardpmembers 14 is such that the space between these members flares both'upwardly and to the front, thereby providing the operator a better, view. of the work without in any respect interfering with the safety or guarding function of these members, and as will be clear by comparing Fig ures 2 and 3 of the drawings. It 'i's"'to""be noted that the gradual forward and downward curve of the forward and upper edges of the guard members 15 present an even and smooth surface to the eye of the operator without any sharp corners or points projecting towards her, it having been found by QXPBIIGHCG that such projection of ends or points, which has sometimes been present in other guard devices, has had the effect of disconcerting, annoying and irritating the operator, by the effect produced upon her eyes as she looks at the work, and has caused the operator to refuse to use the guard device, but instead to remove it or to push it to one side. The shape or contour of the guard members 14 is such, as above described, and as clearly illustrated in the drawings, that these members while eifectively performing their safety or guarding function, at the same time do'not in any manner interfere with the light nor with the vision of the operator, nor in any manner interfere with her operation of the machine, nor annoy her, as has been the case with guard devices heretofore. The large substantially triangular opening 18 is of particular utility in freely admitting light to the work at the stitching point. No matter from what direction the light may come, the construction of the guard members 14 is such that no shadow will be cast upon the work at or adjacent to the stitching point. For threading the needle or changing the needle it is usually only necessary to raise up one of the guard members let at a time, and of course both of them may be elevated at once if desired. Depending upon the particular style of the sewing machine, the needle 8 sometimes is to be threaded from one side, sometimes from the other, sometimes from the front, sometimes from the back, and the independently movable guard mem bers 14: provide for conveniently threading the needle in any way, according to the style of the machine. It is to be noted that a free open space is provided between the upper ends of the guard members 14 all the way forward from the adjacent thin band part of the supporting clamp 10, this free space being of importance in view of the fact that in some sewing machines the needle bar, such as 2, may be much closer to the presser foot bar, such as 4, than is the case in the particular machine illustrated in the drawings and also in view of the further fact that in some machines other de vices belonging to the machine occupy this space, such for example, as a thread takeup, sometimes carried by the presser foot bar and extending forward to a point adjacent to the needle. The complete physical separation, and consequent adaptability for independent movement, of the pivoted guard members 14: therefore is seen to be of.substantial advantage.
It is obvious that various modifications may be made in the construction shown in the drawings and above particularly described within the principle and scope of my invention.
I claim:
A needle guard for sewing machines, comprising a support adapted to be clamped to the presser foot bar, guard members pivoted to said supporting member and adapted to be moved to needle threading and to needle guarding positions, each of said guard members being so constructed as to present an edge which is outwardly and downwardly curved from the pivotal connection between the guard members and the support, and spring tension means tending to resist the movement of the guard members to needle threading position and serving to retain the same normally in needle guarding position.
In testimony whereof, I have ailixed my signature to this specification.
CHARLES SEAMAN.
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2690150A (en) * 1952-02-23 1954-09-28 Charles L Mollis Needle guard for portable sewing machines
US2840023A (en) * 1955-09-28 1958-06-24 Interrante Michael Needle guard

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2690150A (en) * 1952-02-23 1954-09-28 Charles L Mollis Needle guard for portable sewing machines
US2840023A (en) * 1955-09-28 1958-06-24 Interrante Michael Needle guard

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