US1129587A - Sewing-machine. - Google Patents

Description

L. ONDERDONK.

SEWING MACHINE. APPLICATION FILED SEPT. 10, 1907.

1,1 29,587. Patented Feb 23, 1915; 7

I 5 SHEETS-SHEET 1.

L. ONDERDONK.

SEWING MACHINE.

APBLIOATION EILED SEPT. 10, 1907.

6 SHEETS-SHEET 2.

WITNESSES: INVENTOR Alto may L. ONDERDONK.

SEWING MACHINE.

WITNESSES: ,./42 [NVENTOA Aflorzlcy S L. ONDERDONK.

SEWING MACHINE. APPLIOATION FILED SEPT. 10, 1907.

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SEWING MACHINE.

APPLICATION FILED SEPT. 10, 1907.

Patented Feb.23,1915.

5 SHEETS-SHEET 5.

lzag. J.

WITNESSES Alfomeys STATS I LANSING ONDERDONIL OF NEW YORK, N. Y., ASSIGNOR TO UNION SPECIAL MACHINE COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

SEWING-MACHINE.

To all whom may concern:

Be it known that I, LANSING a citizen of the United States, read]? it New York city, in the county of New State of New York, have invented certain.

new and useful Improvements in Sewing- Machines, of which the following is a description, reference being had to the accompanying drawing, and to the letters and figures of reference marked thereon.

My invention relates to new and useful improvements in that class of sewing machines having a walking presser foot or upper feeding mechanism.

The object of my invention is to provide a walking presser foot or upper feeding mechanism that shall be positive in its movements, durable in construction, and ei'licient in operation.

A further object of my invention is to provide a walking presser foot of the above character with a regulatingmeans which is readily accessible to the operator.

My invention consists 1n the parts, arrangements and improvements hereinafter shown, described and set forth in the claims.

In the drawings which show by way of illustration one embodiment of my invention; Figure 1 is a front sectional view of a sewing machine embodying my improvements, the looper mechanism being omitted for the sake of clearness. Fig. 2 is a front end elevation partlyin section, and with certain parts removed, of the same. Fig. 3 is a sectional view of the head of the machine on the line 33, of Fig. 1, looking in the direction of the arrow. Fig. 4 is a rear view of a sectional view of a hanging arm. Fig. .7 is a detail view showing means for raising and lowering the upper feeding member. Fig. (3 is a detail view, showing the means for moving the upper feeding member back and forth. Fig. 7 is a detail View, showing the needle thread controller in plan. Fig. 8 is a detail view in side elevation, of the parts shownin Fig 7. Fig. 9 is a detail view showing the connection of the rock lever 51 to the presser'ban. Fig. 10 is a detail showing a modification of the connection between the rock lever 5land the presser bar. Fig. 11 shows a modified form of presser foot and feeding foot.

Specification of Letters Patent.

ONDERDONK, I

Patented Feb. 23,1915.

Application filed September 10, 1907. Serial No. 382,203.-

my machine are operated from the main.

shaft 5, mounted in suitable bearings 6, 7 and 8 in the overhanging arm. A similar shaft 9, is mounted in bearings 10, 11 and 12 in the bed of the machine, and is rotated f continuously by a belt 13 running over pulleys 14 and 15, carried by .the shaft 5, and

the shaft 9 respectively.

A needle bar 16 reciprocates in the overhanging arm and carries at its lower end the usual needle 17. [Said needle bar .16 is reciprocated by a link 18, which is pivoted to a suitable collar carried by the needle bar at one end, and to a crank 19 mounted on the end of the main shaft 5. Said needle bar carries a thread guide 20 at its upper end. I

A thread controlling arm 21 is secured to an elf set 22, formed on the link 18. A thread guide 23 is preferably attached to the face plate of the machine, and the thread 2% is led from. the supply through a thread eye or a guide 25, at the front end of the machine, then through the thread guides 20, 23 to the controlling arm 21 and then to the needle.

The means for controlling the needle thread forms no part of the present invention and will not need further description in this connection.

The complemental stitch forming mechanism cooperating with the needle to form the stitches, forms no part of the present invention, and has been omitted for the sake of clearness. I

The work supporting post 2, has mounted therein, a feeding mechanism, which derives its entire movements from the shaft 9, mounted in the bed plate and extending into said post at its lower end. Said feeding mechanism comprises a feed dog 26, mounted at the upper end of a feed bar 27. Said feed bar 27 is pivoted at its lower end by a suitable pivotal connection 28, to a yoke 29, which in turn is .pivoted at 30 to the bed plate of the machine. Said yoke 29, carries an arm 31, between which and the body of the yoke is located an eccentric 32, secured to the lower shaft 9. It will be obvious that as said shaft is rotated, the eccentric 32 will cause the yoke 29 to swing about its pivot and'to give to the feed bar, its raising and falling movements whereby it is brought into engagement with the material. Said feed bar 27 receives its back and forward movement from a lever 33, which is connected at its upper end by a link 34, to the feed bar. Said lever at its lower end, encircles an eccentric 35 from which it receives its movement. The lever 33 is pivotally connected between its ends to a link 36 which in turn is pivoted to a rock lever 37 secured to a bracket 38 on the work supporting post, and held normally stationary by a link 39 pivoted to a regulating lever 40. Said regulating lever 40-is pivoted to the work supporting post, and is secured in its adjusted positions by a thumb nut 41.

It will be obvious that as the main shaft rotates, the eccentric 35 will cause the lever 33, to swing about its pivotal support and cause the feed dog 26 to move back and forth. When it is desired to adjust the throw of the feed dog, the thumb nut 41 is loosened and the regulating lever 4.0, is turned about its pivot which swings the rock shaft 37 about its pivotal support and thus changes the relative position of the pivotal support for the link 36. The shifting of the pivotal support of the link 36, varies the amount of throw given to the feed dog by the lever 33. A presser foot 42, carried by a presser bar 43, operates to hold the material on the work support, while the same is stitched. Said presser bar 43 extends through the overhanging arm of the machine and is held in engagement with the material by a suitable spring44, mounted upon the head of the machine in the usual manner and extending through an opening in a collar 45 clamped to said presser bar.

A thread eye 25, is formed in the end of the lever 46, which is pivotally connected to a supporting post 47, mounted in the head of the machlne and said lever at its rear end is connected by means of a link 48 to the collar 45, secured to the presser bar.

It will be obvious from the above construction, that all the movements of the presser bar owing to various thicknesses of fabric, willbe communicated to the lever 46, and the position of the thread eye 25 relative to the thread guide 20 varied in accordance with the thickness of the work.

The supporting post 47 may be adjusted vertically and the position of the thread eye 25 relative to the thread guide 20 varied when desired. The walking presser foot or upper feeding device consists of a foot 49 preferably having a smooth surface at its lower side and with feed teeth at its forward up turned end, which assist said foot in climbing over seams and the like although it is obvious that said foot may be the presser or feeding foot 49 will be raised and lowered. The 'movement of the rock lever 51 is suflicient so that as the feed foot is lowered uponthe material, the rock lever 51 will turn about the pivotal connection 54 between said rock lever and the presser bar 50 and lift the presser foot 42 from the material. The rock lever 51 receives its movements through a link 55 which is pivoted at 56 to said rock lever 51 and at its other end 57, to the arm 58' secured to the forward end of a rock shaft 59 (see Fig. 4) mounted in suitable brackets 60, 61 projecting from the rear side of the overhanging arm. Said rock shaft 59 is provided with a crank 62 at its rear end, to which is pivotally connected an eccentric 63 coiiperating with an eccentric 64, on the main shaft 5. As said shaft 5 is rotated, the eccentric strap 63, will oscillate the rock shaft 59, which will in turn rock the lever 51 and cause first the presser foot 42 and then the feeding foot 49 to be raised from the material. Said feeding foot 49, receives its back and forth movement from a lever 65 (see Figs. 2 and 6), which is fulcrumed upon a link 66 at 67 which link in turn has a pivotal support 68. The lever 65 at its lower end, is connected to the presser member 50 by a link 69. The lever 65 at its upper end is pivotally connected at 70 to an arm 71. Said arm 71 is carried by a' set 73 whereby the arm extends back of the of the movements of the shaft 59 and the vibrating movements of said collar will be imparted to the lever 65 and in turn imparted to the presser member 50, which will cause the feed foot 49 to move back and forth.

The pivotal connection 68 of the link 66 is carried by an arm 77 fixed to the regulating lever 78. Said regulating lever 78 is provided with an operating handle 79 which extends underneath the overhanging arm and along side of the needle head whereby the same is readily accessible to the operator. The regulating lever 78 is formed integral with the cars 80, 81 which carry adjustable screws 82, 83. Said: screws: are so heated relative to the overhang'ng arm that as the regulating lever 78 is oscillated, one screw or the other will! be brought into contact with the head of the machine,

By adjusting the screws 82: and 83 the ex,- treme. positions of movement of the regulating lever may be predetermined. When the regulating lever is in the position. shown in Figs. 3. and 6, the movements of the rock lever Z1 will. cause the 66 to move down wardand backward. as shown. in dotted lines in Fig. 6.,and through the-link 69 moves the feed foot. 19. When however, the pivotal support 68 is moved. to theposition. shown in dotted lines in Fig. 3, then the movement of the fulcrum 67 carried by the link 66 will be.- practically in. a vertical line and no move.-

' ment whatever will. be imparted by the levear 65 to the. feed foot 49.

It will be obvious that instead of using a feed. foot of the, form shown in the illustrated embodiment call my invention that I may use any other. form of. feed or or a feeding finger. By manipulati ng the lever 79, the feed foot. 43 may be caused to vibrate or to be thrown out of vibration.

Theadjustments of the lever '19 may be accomplished while the machine in op eration. By placing the lever 7.9- by-which the feed is adjusted on the needle head, I

locate said lever in a position whereby it is readily viewed by the operator at the same time the operator is watching the progress of the stitching. 1

' The throw of the lower feeding mechanism and the throw of the upper-feeding mechanism are independently adj ustablle and therefore, I am able to. regulate the feeding of my machine so that either the. upper or lower feed may be moved faster than the other or slower than the other and said feeds may also be moved in unisor s 'llhen again by the manipulation of the lever 79., the upper feeding mechanism may be thrown into and out of operation whenever desired without in any way altering the movements of the lower feeding device.

' Where the lever 51 is mounted upon a collar such as shown in Fig. 9 of the drawing, 1 find that there is considerable torsional strain upon the presser bar. In orderto avoid this strain, I have provided as shown in Fig. 10 a guide rod 84: in addition to the usual guide rod 85, which is mounted in suitable bearings in the overhanging arm, and connected to the main presser bar 43 by clamping collars 86.

The guide rod 84 has a. collar 85 at its upper end which is disposed opposite the collar 52 'on the prcsser bar and the rock lever 51 is pivotedto a stud connected to said collars. 52, and 85.

Theguide rods 84 and 85. move up and down with the presser bar and the torsional strain due to. the lifting of the presser bar and the feed foot 49 is distributed between the guide rod '84: and the presser bar 43.

The operation of, my feeding device is as follows: The lower feed bar 36 is raised into engagement with the fabric by means of the eccentric 32, and theeccentric 35 operates to give said feed her its movements to feed the material. I The eccentric 32 is soset on the shaft, relative to the eccentric 35, that the feed dog; is practically raised into engagement with the material for the purpose of feeding thesame before the eccentric 35 operates through the lever 33 to move said feed dog to give thereto its feeding movements. As the eccentric 32 is rotated, the yoke 29 will be oscillated about its center 30. The tendency of the upward os cillation of the yoke 29 about the center 30 is to move the lower end of the feed bar 27 to the right, as viewed in Fig. 2. At the same time, however, that the feed bar 36 is raised by said yoke, the link 34 is turned about its pivotal connection with the lever 33- and the resultant movement of the feed bar is practically a bodily movement upward and slightly toward the front of the machine, into engagement with the material. As soon as the feed dog engages the material, the same is moved to feed the fabric by the eccentric 35. There are three essential elements which cooperate in giving to this feed dog its feeding movements:

First, the eccentric 35 as it rotates with the shaft 3, tends to move the lower end of the lever 33 when in engagement with the materialto the right, swinging the same about its fulcrum point. This movement of the lever 33 will give to the feed dog a feeding movement.

Second, as the lever 33 is lifted by means of the eccentric, the link 33 is swung about its. pivotal connection with the rock lever 37, which carries the upper end of the lever 33, to the. lefi, as. viewed in Fig. 2, also givllzfi to the feed dog a movement to feed the f ,ric. Third", as the lever 33 is lifted by the eccentric, the link 34 is turned about its pivotal'connection with the feed bar, and owing to the fact that the feed bar is practica y stationary ertically at this time, this movement. of sairf link will also move the feed dog to give still an additional movement thereto.

These three active elements in the movement of the feed dog, combine to give to said feed dog a very quick feeding movement, and likewise a very quick backward .movement when disengaged from the material. I

It will be noted that the eccentric 32 engages the yoke 29 at a greater distance from the pivotal point- 8 in lifting the feed dog,

than when lowering the feed dog. For this reason, the feed dog is slow in its first movements into engagement with the fabric, and is also quick in leaving the fabric, and, therefore, the needle is given time to reach a point well above the work plate before the feed dog is operated to feed the material.

The upper feed dog is brought into engagement with the material by the eccentric 64. As this eccentric is rotated, starting with the parts as in Fig. 2, the rock lever .51 is turned about the pivot point 53, and the feeding foot 49 lowered into engagement with the material to be operated upon. A further movement of the eccentric 64 then causes the rock lever 51 to turn about the pivotal point 54 as a center, and lift the presser foot 42 clear of the material. These parts are preferably so timed relative to the lower feed, that the foot 49 is brought into contact with the material and the presser foot 42 lifted ready for the feeding operation at the same time the feed dog is lifted by the yoke 29 and eccentric 32 into contact with the material, ready for its feeding movement. However, said upper feeding foot may be timed so as to contact with the material in advance of the lower feed dog, or at a later period.

There are two essential features which combine to give the feeding foot 49 its feeding movement:

First, the eccentric 76 rocks the lever 71, which moves the lever downward. This downward movement of the lever 65 causes the link 66 to swing about the fulcrum point 68, and vibrate the lower end of said lever 65 laterally, and through the link 69 move the feed foot.

Second, the arm of the rock shaft supporting the lever 65 moves from substantially a horizontal position downward, thus carrying the upper end of the lever 65 to the right, as viewed in Fig. 6. This movement of the arm swings the lever 65 about the fulcrum 67, and gives an additional movement to the feeding foot 49.

.These two features combineto give a very quick forward movement to the feeding foot 49, and also a quick return movement when out of engagement with the material.

By my arrangement of parts, I have provided a feeding mechanism which may be operated to clamp the material and move the same quickly to position said material for the next stitch. Also by my arrangement of parts, the feeding movements may be given the material after the needle is well above the fabric.

One of the many advantages of delaying the feed operation until the needle is well above the work plate, is, that I am thereby enabled to stitch very thick material, and to pass over'readily thick seams, as the needle is well up out of the material before the feeding action takes place, and is completed 9 before the needle has descended far enough to enter the work.

As above noted, the feeding stroke of the feed foot 49 may be quickly decreased by turning the regulating lever 7 9 or the movements of this foot to feed the material stopped at any time and without stopping the machine. On the other hand, the feeding movements of the feed foot 49 may be increased so as to move in advance of the lower feed and thus full in or gather the upper of a plurality of layers of material, if desired. The feeding foot will be varied in form, of course, to best adapt the same for the character of work desired to be accomplished.

In Fig. 11 I have shown'a modified form of feeding foot and presser foot which are especially adapted for climbing over seams and abrupt increased thickness of material. The presser foot is formed at its forward end with a substantially rectangular notch 42 forming a projecting toe 42. The feeding foot 49 is provided with a similarly shaped notch 49, forming a projecting toe 49". In a machine of the type herein disclosed, it is advantageous to lift the presser foot for the movement of the material and the feeding foot for its return stroke a limited distance relative to each other. The greater the distance these parts are moved relative to each other, the greater the work required of the machine, as the presser foot is necessarily held down by a heavy spring.

Furthermore, where these parts are given considerable vertical movement more or less pounding or jarring occurs in this operation. With my improved form of notched presser foot and feeding foot, I am enabled to give these parts a very limited movement and still climb over abrupt changes in the thickness of the material, as above noted.

The operation is as follows: When the feeding foot 49 is operating to move the material, the ,foot 42 is lifted to allow the work to pass underneath the same. It is not necessary to lift the foot 42 so that the seam or increased thickness will pass underneath the bottom of the foot, but only suflicient so that said seam will pass underneath theprojecting toe into the recess 42'. The foot is now lowered on to the material until the projecting toe engages the seam, and this will determine the lowest position of said foot relative to the work support. The feeding foot 49 is now lifted the usual distance above the under surface of the foot 42, and as said foot 42 is held by the seam raised above its previous position, the feeding foot will be lifted further from the work support than on the previous stroke. Likewise as the foot 49 moves forward to engage the material, if the seam or other abrupt 1ncrease in thickness of material is above the plane of the under surface of said feeding foot in its raised position, still the projection 49 will move over the top of the seam, and be lowered onto the same. The seam holding the feeding foot at a greater distance from the work support than on the previous stroke, will cause the foot 42 to be lifted higher, so that the seam will be carried under the toe 42.

It is obvious that minor changes may be made in details of construction and the arrangement of parts, without departing from the spirit of my invention.

Having thus particularly described my invention, what I claim as new and desire to secure by Letters Patent is 1. A sewing machine including in combination, a bed plate, a work supporting post rising therefrom, an overhanging arm carried by said bed plate, feeding mechanism mountedin said work supporting post, a presser bar mounted in said overhanging arm, carrying a presser foot at its lower end, a feeding mechanism carried by said overhanging arm, comprising a feed foot, a supporting member therefor, a rock lever pivoted to said presser bar, and connected to said supporting member at the upper end thereof, means for vibrating said rock lever, a lever pivoted to said overhanging arm, a link connecting said lever to said supporting member at a point intermediate its ends, and means for oscillating said lever whereby said feed foot is moved back and forth.

2. A sewing machine including in combination a bed plate, a work supporting post rising therefrom, an overhanging arm carried by said bed plate, feeding mechanism mounted in said work supporting post, a presser bar mounted in said overhanging arm and carrying a presser foot at its lower end, a feeding mechanism carried by said overhanging arm, comprising a feed foot, a supporting member therefor, a rock lever pivoted to said presser bar and connected to said supporting member at the upper end thereof, means for vibrating said rock lever, a lever pivoted to said overhanging arm, a link connecting said lever to said supporting member at a point intermediate its ends, and means for oscillating said lever whereby said feed foot is moved back and forth, and means for adjusting the effective throw of said lever.

3. A sewing machine including in combination, a work support, an overhanging arm, a feeding mechanism carried thereby, comprising a feed foot, a supporting member therefor, means for raising and lowering said supporting member, a lever pivoted to the overhanging arm, a link for connecting said lever to said supporting mem- .ber and lying substantially parallel to the path of movement of said feeding member, means for vibrating said lever and devices for rendering the movements of said lever effective or ineffective for vibrating said supporting member laterally.

4. A sewing machine including in combinationa work support, an overhanging arm, a feeding mechanism carried by said overhanging arm and comprising a feed foot, a supporting member therefor, means for raising and lowering said supporting member, a lever, a link connecting said lever to said supporting member and lying substantially parallel to the path of movement of said feeding member, means for vibrating said lever, and a pivoted link on which said lever is fulcrumed.

5. A sewing machine including in combination a work support, an overhanging arm, a feeding mechanism, carried by said overhanging arm and comprising a feed foot, a supporting member therefor, means for raising and lowering said supporting member, a lever, a link connecting said lever to said supporting member and lying substan tially parallel to the path of movement of 'said feeding member, means for vibrating said lever, a pivoted link on which said lever is fulcrumed, and means for adjusting the pivotal support of said last named link.

6. A sewing machine including in combination a work support, an overhanging arm, a feeding mechanism carried by said overhanging arm and comprising a feed foot, a supporting member therefor, means for raising and lowering said supporting member, a lever, a link connecting said lever to said supporting member, means for vibrating said lever and a pivot link on which said lever is fulcrumed, means for adjusting the. pivotal support of said last named link, and devices for determining the position to which said pivotal support is to be adjusted.

7. A sewing machine including in combination a feeding member, a feed foot carried thereby, a presser bar, a presser foot carried thereby, a rock lever, an auxiliary bar connected to said presser bar and reciprocating therewith, said rock lever being pivoted between said presser bar and said auxiliary bar and having one of its arms connected to the feed member and means connected to the other arm of said rock lever for vibrating the same.

In testimony whereof I ailix my signature, in presence of two witnesses.

LANSING ONDER-DONK.

Witnesses WALTER HARTLEY, FRANKLIN H. CHILTON.

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