US2644414A - Sewing machine with drive and support therefor - Google Patents

Description

y 1953 Q G. SAUER ETAL 2,644,414

I SEWING MACHINE WITH DRIVE AND SUPPORT THEREFOR Filed May 14, 1949* 7 Sheets-Sheet 1 IN VEN TORS.

GEORGE SAUER .BY ALBERT M. SCHWEDA ATTORNE July 7, 1953 G. SAUER ET AL 2,644,414

SEWING MACHINE WITH DRIVE ANi) SUPPORT THEREFOR 7 Sheets-Sheet 2 Filed May 14, 1949 INVENTORS. GEORGE SAUER y ALBERT M. SCHWEDA ATTORNEY.

July 7, 1953 G. sAuER ETAL SEWING MACHINE WITH DRIVE AND SUPPORT THEREFOR 7 Sheets-Sheet 3 Filed May 14, 1949 INVENTORS;

GEORGE SAUER y ALBERT M. SCHWEDA ATTORNE July 7 1 5 G. SAUER ETAL- SEWING MACHINE WITH DR'IvE AND SUPPORT THEREFOR 7 Sheets-Sheet 4 Filed May 14, @949 INVENTORS. GEORGE SAUER y ALBERT M. SCHWEDA ATTORNEY.

SEWING MACHINE WITH DRIVE AND SUPPORT THEREFOR GEORG SAUER y ALBERT M. scHwEoA' ATTORNEY.

y 7, 1953 G. SAUER ETAL 2,644,414

SEWING MACHINE WITH DRIVE AND SUPPORT THEREFOR Filed May 14, 1949 '7 Sheets-Sheet 6 INVENTORS.

GEORGE SAUER BY ALBERT M. SCHWEDA QJZM/ ATTORNEY.

y 7, 1953 G. SAUER rm 2,644,414

SEWING MACHINE WITH AND SUPPORT THEREFOR Filed May 14, 1949 7 Sheets-Sheet 7 GEORGE SAUER y ALBERT M. SCHWEDA ATTORNEY.

Patented July 7, 1953 UNITED STATES PATENT OFFICE SEWING MACHINE WITH DRIVE AND e SUPPORT THEREFOR George SauergBerwyn, and Albert Schweda,

Chicago, Ill., assignors to Union Special Ma-' chine Company, Chicago, 111., a corporation of Illinois Application May 14, 1949,, Serial No. 93,346

9 Claims." (01. 112-258) 1 This invention relates to sewing unitsiof the type including a sewing machine, an individual drive therefor and a readily shiftable supporting structure. More particularly it relates to a unit of this character in which the sewing machine and its drive are mounted upon a pedestal or columnoextending upwardly from a large floor engaging base which provides a steady and sturdy support but is free to be shifted about to facilitate rearrangement of a series of machines forming a sewing line. 4 I

A primary objectof the invention has been to provide a mounting for the ma chine which enables easy adjustment of the machine on its support in a variety of different ways and directions to accommodate the unit to different operators and for the performance of different operations, to best advantage.

An important specific object has been to provide a pedestal type of support which will permit tilting of the sewing machine to any desired extent toward or away from the operator in order to present the work supporting surface at the most advantageous angle for a particular operation and one most convenient fora particular operator. v

Another object has been to provide a support of the character indicated which will perm-it simple and easy adjustment of the machine in both a vertical and a horizontal direction so as to position the machine mostadvantageously in relation to the supporting column for any selected operator and operation. I

A further object has been to provide a sewing unit having the foregoing capabilities with simple and effective control means, adapted for convenient operation by the operator, for throwing the machine into and out of operation and for liftin the presser foot, and the like.

The foregoing objects have been attained in relation to sewing machines of different types, such as a feed-oiT-th'e-arm machine and a flatbed machine. Certain special features have been devised in relation to eachof these types of machines and it will be understood that the inven-, tion may be readily adapted for machines of other types.

An outstanding advantage of the invention is that'it enables the production of certain standard units which may readily be adapted, as indicated above, for most convenient use by difierent operators of diiferent stature and personal preferences, and for use in performing different operations. In certain operations it is important to look down upon the work in a direction substan- I tially normal to the work support and in such operations it is desirable to tilt the machine forwardly toward the operator so that the work support is inclined upwardly at a suitable angle away from the operator. In other operations it is importantto observe more closely the manner in which the work approaches the stitching point and is fed under and past the presser foot. For such operations it is desirable to tilt the machine rearwardly away from the operator to incline the work supports downwardly at an appropriate angle away. from the operator. Different oper ators moreover, according to the preferences, find it desirable to assume difierent angular positions in relation to the work support for a particular operation and because of their varying heights and other characteristics find it desirable to vary the height of the machine and its position horizontally in relation to the treadles and supporting column. The present invention provides the necessary adjustment for all 'of these purposes.

Other objects, features and advantages of the invention will appearfrom the detailed description of certain illustrative forms of the same which will now be given in conjunction with the accompanying drawings, in which:

Fig. 1 is an elevational view showing one form of sewing unit embodying the invention, parts bein broken away to condense the view and to show normally concealed parts;

Fig. 2 is a detail view on an enlarged scale showing the collar provided at the upper end of the pedestal column;

Fig. 3 is a plan view of the sewing unit with parts broken away to disclose more clearly certain concealed parts of the structure;

Fig. 4 is a detail view in plan showing a support member embodied in the unit of Fig. 1;

Fig. 5 is a plan view of the collar shown in Fig. 2;

Fig. 6 is a view, partly in plan and partly in horizontal section, taken substantially along the line 6-5 of Fig. 1;

Fig. 7 is a front elevational view of a modified form of sewin unit embodying a flat bed sewing machine, a portion of the power drive being broken away;

- Fig. 8 is an end elevational view of the unit of Fig. 7, taken from the right in Fig. 7

Fig. 9 is a plan view of the unit of Fig. 7; and

Fig. 10 is an end elevational view of the upper portion of the unit of Fig. 7 showing the sewing machine and its drive in a tilted position.

Referring now to Figs. 1 to 6 of the drawings, there is illustrated, as one embodiment of the invention, a unit having a feed-off-the-arm type of sewing machine similar to that disclosed in the Christensen, et a1. Patent No. 1,741,095, granted December 24, 1929. It is also illustrated, in modified form, in Christensen Patent No. 2,374,731, granted May 1, 1945, and in the Sauer application, Serial No. 602,198 filed June 29, 1945. The unit as a whole is similar in many respects to that disclosed in the Christensen, et al. application Serial No. 704,322, filed October 22, 1946. Many features and adjuncts disclosed in the last mentioned application may be incorporated in the new construction, though they are not herein specifically shown and described.

The improved sewing unit comprises a pedestal support havin a floor engaging member Ill provided with downwardly extending bosses I forming feet adapted to engage the floor and retain the unit in any set position simply by frictional coaction with the floor. Adjacent one end of'the' member ID there is provided a vertically ext-ending split collar l2 adapted to receive the lower end of a tubular column I3. The. latter is held by a series of clamping screws |4 adapted to squeeze the split collar together around the column. The total height of the pedestal may be varied somewhat by adjusting the extent to which the-column is inserted in the collar |2. Adjacent its upper end the column |3 carries a split collar [5 having, in plan, the configuration illustrated in Fig. 5. Clamping screws [6 serve to tighten the collar upon the upper end of the column to hold it in place. The collar may be adjusted both axially and angularly in relation to the column to vary the height of the sewing machine above the floor and to vary its angular relation to the floor engaging member ID. A separate split collar ll, secured to the column by a screw 13, may be provided beneath the collar 15 to assist in maintaining its vertical position on the column.

As best shown in Figs. 2and 5, the collar I5 is provided with a relatively broad, flat face l9 from which projects a trunnion or stud 20. The latter is adapted to carry, pivotally, a main support member designated generally by reference character 2|. lvfember 2! has a downwardly extendingvertical flange portion 22 carrying a hublike extension 23 adapted to fit snugly over the trunnion 25. The inner face of the flan e 22 is flat and arranged to lie against the surface IQ of the collar. Arcuate slots 24, extending through the flange 22, are disposed at opposite sides of the hub 23 and are curved about the axis of the latter. These slots are adapted to receive the shanks of a pair of bolts 25 which have screw threaded engagement with openings 26 in the collar IS. The latter is also provided with a series of holes 2? arranged in an are about the center of the trunnion 25 in a region below the latter. A large headed pin 28, carried by the flange 22 and passing through a suitable opening in the latter, is adapted to cooperate with one or another of the holes 21. Pin 28 is urged inwardly by a flat spring element 29, which is secured to the flange 22 and forked to straddle a reduced portion of the pin. It will be apparent from the foregoing that when it is desired to change the angular relation between the support member 2| and the collar l5, it is simply necessary to loosen the screws 25 and to withdraw the pin 28 from the engaged hole 21. The member 2|, with all of the parts carried thereby, to be explained hereinafter, may then be tilted either forwardly or backwardly to a new position and the pin 32 extending downwardly from the power unit are adapted to cooperate with elongated slots 33 in the portion 30 of the support member and may serve to clamp the power unit to the latter. Provision of the elongated slots 33 makes it possible to adjust the position of the power unit laterally on the support member, at right angles to the axis of the unit, for belt tightening purposes, as will presently appear.

An extension 31 of the support member 2| is provided with a flat surface 38 against which may be placed a corresponding surface on the frame 39 of the sewing machine 40 of the feed-off-thearm type indicated above. Suitable bolts or screws may be employed for attaching the sewing machine frame to the extension 37. It will be understood that the sewing machine embodies all of the usual mechanisms for stitch formation, feeding of the work, control of the thread, and the like. It is provided with a work arm 4| which is normally disposed horizontally, that is when the support member 2| is in its normal or central position. By tilting the member 2| forwardly toward the operator or backwardly away from the operator, the arm 4| may be inclined either upwardly or downwardly from the horizontal, as desired. A combined hand wheel and pulley 42 is provided to supply power to the sewing machine for driving the latter, this pulley being connected by a belt 43 with the pulley 36 of the power unit.

A bracket 44 having a split collar or hub adapted to surround and grip a sleeve forming part of the clutch of the power unit, in a manner well known in the art and as is more fully disclosed in the abovementioned Christensen, et a1. application, has a laterally extending arm 45 which is connected by a bolt 45 with the upper end of a rod 47. The latter is connected by a coupling 48 with another vertically extending rod 49. Rods 4'! and 49 are in effect a single rod which may be lengthened or shortened by varying the extent to which they overlap at the coupling 48. This rod extends downwardly through the column to its lower end and there is swivelly connected by a bolt 50 with the end of a curved arm 5|. This, at its opposite end, carries or is secured to a hub 52 keyed to a rock shaft 53 mounted in bearings 54, 55, and 56 in the member ID. A treadle 51, Fig. 1, is secured to the rock shaft 53 by means of downwardly extending arms 58 and 59 of the treadle which are keyed to the shaft. It will be seen that, through the foregoing connections, rocking of the treadle in a clockwise direction, as viewed from the right in Fig. 6, will draw the rod 49 downwardly and correspondingly rock the bracket 44 and the connected sleeve, thereby causing the engagement of the clutch in a well known manner. At the same time another laterally extending arm SI of the bracket 44 may serve to operate a lubricant pump through a connection 62 with an arm 63 associated with the pump. The latter is not herein disclosed, but for further details regardin it, reference may support member 2|. shaft I3 adjacent the bearing lis connected by 64 carries a" diagonally disposed rod 61 which'extends beneath the lower end of the column I3 and is-th'ere connected by a bolt 68 with a rod 69 that extends upwardly throughthe column. At its upper end the rod 69 has an enlarged head I0 (Fig. 1), which has a ball joint construction by a bolt II (Fig. 3),, with an arm I2 secured to-a rock shaft 13. The latter is journalled' at its opposite ends in-bearings I4 and-15 carried by the An arm'16 secured to the a link'IGa with an arm I! which is, in turn, connectedby a link 'IIawith an arm 18. This, as.

disclosed in the above mentioned patentsand pending applications, is arranged to lift the presser bar of the sewing machine.

. I 6 I As in the first form,the height. of-thegcolumn may be varied to some extent by varying thedise, tance to which the column 88 is inserted inthe hub- 81. Adjacent its upper end the column 8.8..is

provided with a collar 90,, whichhasits .lower portion split verticallyqand providedwith. clamp.-

' ing screws 9| to -attaoh,.-the same firmly to the column, Further vvertical adjustment, of 1 the overall height of the support is provided by varying the vertical location of the collar 90 in re-: lation, tothe column. A separate collar 92 of split constructio clamped to the column88'by The upper end of the presser bar, indicated at I9 in Fig. 3,

isv engaged by a spring 80 which normally urges the bar downwardly to engage its presserfoot with the work. Rocking of the treadle 64 serves to lift the presser bar. and presser foot through the connections described. It will be understood that springs are suitably provided for urging the parts, operated bythe treadles 51 and 64 into a normal inactive position. These springs are not disclosed herein, but are shown in said Christensen, et a1. application.

7 Any or all of the features and adjuncts disclosed in the above mentioned patents and pending, applications, such as the thread controlling means and the like, may be incorporated in the present construction; .'.By the provision of the pivotal supporting member 2|, it is possible to tilt the sewing machine either into the position illustrated in Fig. 1 or in the opposite direction,

as best suited forthe particular operator and the operation involved. At the same time provision is made for various other adjustments. Thus bylifting or turning the collar I5 in relation to the-column [3 the position of the work arm 4| may be suitably varied in relation to the treadles, both as to height and horizontal angular position. Tightening of the belt 43 may. be effected by adjusting the power unit laterally on the member 2!. All of the various adjustments described are permitted by the operating connections in-* volved. The, forward orrearward tilting of; the. support member 2| may be accomplished without altering the ,connectionsfrom the 'treadles. but

provision may be made for varying the length of these connections whenever desired, as when the collar I5 is raised or lowered. Suitable means for this purpose'will be described in relation to corresponding connections provided for the second embodiment of the invention to be presently described.

v Referring now to-Figs. '7 to 10 inclusive, there is shown another embodiment of the invention in which a flat bed sewing machine is mounted ,upon a pedestal support with the capability of tilting the machine either forwardly or backwardly to suit a particular operator and a particular operation to be performed. As in the first embodiment, the pedestal comprises a floor engaging member 85 having footlike projections 86 adapted to frictionally engage the floor. Rising vertically from the member 85,, toward one end of the latter, is a split hub or;sleeve 81 adapted to receive "a hollow column 88 The latter is clamped in the hub by means of screws 89.

and I02. v

To the upper surface of the support member;

mounted on the ztrunnions by suitable bearing or clamping means. For this purpose. a pro-.-.

'jection 91, which extends downwardly from the:

memberfifi, is provided witha bearing surface adapted to cooperate with the trunnion 94. A lower cap as completesthe bearing, this cap being secured to the projection by screws 99.. The are rangement is preferably such that the two sections of the bearing may. be clamped tightly about the trunnion to assist in holding the sup-- port in any position to which it maybe adjusted. Similarly, a downward extension IGIlof the support member 96 has a bearing engagement with the trunnion and this bearing is completed by a lower cap I0! securedby means of screws I02. These parts may likewise assist in retainingthe support in, any adjusted position by tightly clamping the trunnion 95.

Trunnion 95 is provided withworm wheel'teeth,

I03 arounda, portion of its circumference." If desired, theseteeth may be provided complete-' 1y around. the trunnion. Cooperating with the. teeth IE3 is a worm portion I04 on a rotatable stud I05. The latter has an enlarged, knurled head I06 at one end by which it may be readily rotated. At its opposite end the stud hasfixed thereon a collar. I01 which serves. to hold. it in place. Upon loosening the screws .99 and1l02,

to unclamp the support from the trunnions,.and

then rotating the knurled head IGt, the'support. member 96 vmay be caused to-revolye bodily around the. supporting ,trunnions in one direc-.-

tion or they other depending upon the direction of rotation of the stud I05. rearwardly, for example, into the position indicated in Figure 10, or it may be tilted forwardly of its central, horizontal position. When the support member has'been tilted to the desired position, it is. held by the coaction of the: worm and worm wheel teeth, but it is preferably clamped more firmly by tightening'the screwsz99 96 is secured a table board I08, this-being attached in any suitable way,,as by means of bolts:

' of the lockstitch type. Support member 96 is also formed to provide an opening for the down-' .ward extension I I I of the sewing machine frame.-

It may be tilted:

7 II3 and 'Il4 parallel withthe "front and back surfaces of the portion III of the sewing machine. The sewing machine is prefrablysupported directly by the i member 96- atthe four points designated H5 in Fig. 9. To eliminate noise and deaden vibration, sections of felt:or similar material are preferably placed between the bottom of the sewingmachine and the surfaces of the member 96 on which themachine rests. v

w i The base of the sewing machine is preferably hingedly supported by the-table top I88 and for this purpose hinges H6 and Ill of conventional form, may-be provided. This enables tilting of the sewing machine backwardly to expose the bottom'of the machine for servicing and inspection.- A pin '8 extending upwardly from the table top is adapted to engage the frame of the machine-as it is in its rearwardly tilted position and support the same in such position. It will be understood that the sewing machine may be of any desired construction and may, for example, be of the type disclosed in Patent No. 2,446,245, granted to Charles F. Rubel on August 3; 1948. It has an overhanging arm H9 which carries a needle head at its outer end for supporting a reciprocating needle bar, a presser bar, and the like; a rotary hook, work feeding devices and the like are provided in the base I I I. Further description of the details of the sewing machineis believed to be unnecessary. It may suitably be driven through a combined hand- Wheel and pulley I20 mounted on a shaft which extends longitudinally of the arm IE9 and projects beyond the frame of the machine. This pulley is connected by a belt I2I with a pulley I22 on a power drive unit indicated generally at 123.

' The power drive may be of the same type as described in connection with Fig. 1, consisting of an electric motor and a clutch. It is suspended from an extension I24 of the support member 86. This extension is providedwith a plurality of elongated slots I25, I26, and I2! adapted to receive bolts I28, which may be either solid or hollow, extending upwardly from the power unit when positioned as shown. Noise and vibration isolating pads or elements I29 are preferably employed between the various metallic surfaces, as

best shown in Fig. 8. These pads may be in the form of felt or rubber washers or the like, surrounding the bolts I28. They may also, if desired, be provided with sleeves or collars of re-- duced diameter to cooperate with-the openings in the support member and the frame of the power unit to hold the bolts spacedfrom-the The clutch of the power walls'of these openings. unit may be of the type having a rockable and axially shiftable sleeve providing a bearing for the 'driven shaft which carries the pulley I22. This sleeve, as is well known in the art, is adapted to be rocked in order to bring about engagement of the clutch. An arm I30 secured to the sleeve adjacent one end is provided with an eyeurges a washer I38 against the undersurfaceoff the eyelet-and-cooperates at its opposite end with a collar I39secured to the rod I33.- In

Spring I34, preferably of conicalorder to permit lengthening orshortening of the rod in accordance with adjustment of the collar 90,11; is formed in two sections, the lower section being designated I48. The two sections may be clamped togetherfin' any desired position by means'of a clamping collar I40a. At its lower end the rod I40 is connected, preferably by a ball joint, with the outer end of an arm I4I secured to arock shaft I42 (Figs. 7 and 8). This rock shaftis mounted in suitable bearings carried by the portion 85 of the pedestal and has secured to it, at a convenient point, a foot treadle I43. Throughthe: connections described the power drive maybe thrown into and out of operation by rocking of the treadle I43.

Another treadle I44,'pivotally mounted at its forward end by a shaft I45 in suitable bearings carried by the base portion 85 of the pedestal, has a laterally extending stud I46 adjacent its opposite end. This stud is connected by a rod' I41 with a second rod I48 through a coupling or clamping collar I49. Rod I4'I has a swivelled or ball connection with the stud I46. The upper end-of rod I48 is connected indirectly, through a rock'lever (not shown), carried by the sewing machine frame, with another rod I48a which as best shown in Figs. 8 and 10, is connected with an arm I58 extending rearwardly from the sewing machine frame. This arm, as will be understood, is connected with suitable means for lifting the presser bar of the sewing machine. The means for this purpose may be of the type disclosed in the patent to Quist No. 2,414,168, granted on January 14, 1947. However, the rock 1ever mentioned will so connect the rods I48 and I48a as to cause these to move in the same direction. Provision of this rock lever enables tilting of the sewing machine on its hinges, as explained, without disconnecting the rods I41, I48 and I48a. If desired, however, therod I48 may be connected directly with arm I50 and provision made for disconnecting the rod from the arm when the machine is to be tilted rearwardly on its hinges, or .the rods I48 and MM may simply be connected by a suitable swivel joint for the purpose.

As in the first embodiment, the support 96 and the various parts carried by it may be readily adjusted in a variety of different ways to suit a particular operator and type of operation. It may be elevated-or lowered; it may be shifted angularly about the axis of the column 88, if desired, and it may be tilted to any desired angle from the horizontal, either forwardly or rearwardly. The power unit may be shifted laterally of the support for belt tightening purposes.

-While several embodiments of the invention have been disclosed in considerable detail, it will beunderstood that itmay be embodied in a varietyof other forms. Certain features disclosed in connection with one embodiment may, if desired, be incorporated in the other. Various other changes may be made without departing from the general principles and scope of the invention.

What we claim is:

l. A sewing unit comprising a supporting structure having a floor engaging portion and a vertically extending column carried thereby at one side of the center thereof, a collar mounted on said column adjacent its upper end, a substantially flat support carried by said collar in a substantially horizontal position, horizontal pivot means securing said support to said collar, said means andmeans connecting said power unit with said machine for driving the latter,

2. A sewing unit comprising a supporting structure having a floor engaging portion and a vertically extending column carried thereby at one side of the center thereof, a-collar mounted on said column adjacent its upper end, a substantially flat support carried by said collar in a substantially horizontal position, horizontal pivot means securing said support to said collar, said means enabling angular adjustment of said support about a horizontal axis on said collar for upward and downward inclination to the horizontal, means serving to retain said support in set posi tion on said collar, a sewing machine secured to said support for adjustment therewith, said machine having a work supporting member substantially parallel with said support, a power unit also secured to said support for adjustment therewith, means connecting said power unit with said machine for driving the latter, a'treadle carried by said floor engaging portion of said supporting structure, and connections from said treadle for controlling the operation of said machine by said power unit.

3. A sewing unit comprising a supporting structure having a'floor engaging portion and a column rising therefrom, a normally horizontal support member mounted on said column adjacent its upper end, said column and member being provided with cooperating means enabling tilting ,of said member in either direction from the horizontal about a horizontal axis, means for locking said member in the position to which it is adjusted, and a sewing machine secured to said member, said sewing machine having a work supporting surface substantially parallel with said support member and arranged to be inclined upwardly or downwardly in a direction away from the position assumed by the operator thereof upon the angular adjustment of said member.

4. A sewing unit comprising a supporting structure having a floor engaging portion and a column rising therefrom, a normally horizontal support member mounted on said column adjacent its upper end, said column and member being provided lel with said support member and arranged to be inclined upwardly or downwardly in a direction away from the position assumed by the operator thereof upon the angular adjustment of said member.

'5. A sewing unit comprising a supporting structure having a floor engaging portion and a column rising therefrom, a normally horizontal support member mounted on said column adjacent its up- I per end, said column and member being provided with cooperating means enabling tilting of said member in either direction'from the horizontal about a horizontal axis, means for locking said member in the position .to which it i sailfish,

a sewing machine secured to said member,,,said

- sewing machine having a work supportingsurface substantially parallel with -jsaid support member and arranged to be inclined upwardly or downwardly in a'direction away from the position assumed by the operator thereof uponthepangular adjustment of said member,.a driving unit also secured to said member, and means for connecting said driving unit with said sewing machine.

6. A sewing unit comprising a supporting structure havinga floor engaging portion and a column rising therefrom, a normallyhorizontal support member mounted on said column adjacentits upper end, saidcolumn and member being provided with cooperating means enabling tilting of said member in either direction from the horizontal about a horizontal axis, means for locking said member in the position to which it is adjusted, a

sewing machine secu to said member, said sewing machine having a work supporting sur-- face substantially parallel with said support member and arranged to be inclined upwardly or downwardly in a direction away from the position comprising a motor and a clutch having driving and driven elementsmeans connecting the driven elementof the clutch with said sewing machine, an arm connected with said clutch for controlling the engagement and disengagement thereof, said armextending to a point over the upper end of said column, a treadle carried by said floor engaging portion, and connections from said treadle to said arm including a rod extending upwardly through said column. I

'7. A sewing unit comprising a supporting structure having a floor engaging portion and a column rising therefrom, a normally horizontal support member mounted on said column adjacent its upper end, said column and 'member being provided with cooperating means enabling tilting of said member in either direction from the horizontal about a horizontal axis, means for locking said member in the position to which it is unit, a belt connecting said unit-with said sewing machine and means for securing said driving unit to said member, said securing means en-- abling lateral adjustment of said driving unit on said member for belt tightening purposes.

8. A sewing unit comprising a supporting structure having a floor engaging portion and a vertically extending column carried thereby at one side of the center thereof, a collar mounted on said column adjacent its upper end, a substantially fiat support carried by said collar in a substantially horizontal position, horizontal pivot means securing said support to said collar, and means enabling angular adjustment of said support about a horizontal axis on said collar, means serving to retain said support in set'position on said collar, a sewing machine secured to said support for adjustment therewith, said sewing machine being of the feed-off-the-arm type and having a work arm with its axis disposed substantially perpendicular to the vertical plane containing said horizontal axis when said support is in its 1 1 central position, a power unit also secured to said support for adjustment therewith, and means connecting said power unit with said machine for driving the latter.

9. A sewing unit comprising a supporting structure having a floor engaging portion and a vertically extending column carried thereby at one side of the center thereof, a collar mounted on said column adjacent its upper end, said collar having a trunnion projecting horizontally therefrom, a support having a portion which is nor mally disposed horizontally and a part having a bearing engagement with said trunnion for tilting of said support in opposite directions from trunnion, a, sewing machine and a power drive unit secured to said support, said sewing machine having a Work supporting surface substantially parallel with said support, and means for connecting said power drive unit with said sewing machine for driving the latter,

GEORGE SAUER. ALBERT M. SCHWEDA.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 1,424,698 Webb Aug. 1, 1922 2,474,331 Sauer June 28, 1949 2,511,047 Christensen et a1. June 13, 1950

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