US2947271A - Supporting bases for cylinder bed machines - Google Patents

Description

2, 1960- M. R. PERLA 2,947,271

SUPPORTING BASES FOR CYLINDER BED MACHINES Filed Feb. 13, 1956 2 Sheets-Sheet 1 Q Q if-) 21 27 '51.} I

s i I 5 I I3 i l i n I I .';s;-1-{r-27 3o 25 mmvron Martin R. Per/a- WITNESS BY W g W% TTV:

Aug. 2, 1960 M. R. PERLA SUPPORTING BASES FOR CYLINDER BED MACHINES Filed Feb. 15. 1956 2 Sheets-Sheet 2 Manl'n R. Per/a A T TORNE Y WITNESS E Z Z Flg. 6.

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Filed Feb. 13, 1956, Ser. No. 565,122 7 Claims. (CL 112L260) This invention relates to sewing machines, and more particularly, to a novel base construction for supporting and Stabilizing a portable sewing machine during use.

Those sewing machines which are intended to-b'e portable 'in the sense that they are intended to be fully operative on any su portin surface such as a table top,

desk, counter-top or the like, present serious problems of support and stability, which problemsYare not encountered with sewing machineszmounted in supporting cabinets especially designed to receive the machine.

' These support and stability problems of portable sewing machines are particularly acute as they pertain 'tothe soij iiiii Patented Aug. 2, 1960 i 2 along 'a left end elevational view of the line 3-3 of Fig. 2 witha portion of the supporting base being "broken away to illustrate the fastening means.

Fig. 4 is a front elevational view of a portion of a sewing machine having a modified fonn or su porting base applied thereto. I

Fig.5 represents a bottom plan view of that portion of the sewing machine illustrated in Fig. ,4.

Fig, 6 is a cross sectional view takensubstantially along line 6-6 of Fig. 5 and V Fig. 7 is an enlarged cross sectional view taken substantially along the line 7-7 of Fig. 5.

Referring to the drawings, this invention .in preferred form is applied to a sewing machine having a free work supporting arm 11 or a cylinder bed as it is also commonly referred to in the art. The work supper'ting arin extends laterally outwardly from a machine base 12 of which a vertical continuation forms a standard 13 carrying a bracket arm 14 which overhangs the work supporting arm. ;As a matter of convenience of manufacture,

, the base and the standard may be fabricated separately,

but in any event the standard and base when assembled called cylinder bed sewing machine, thatfis, a sewing machine having a projecting work supporting arm provided with a free and adapted to accommodate tubular articles to be stitched.

In the usual cylinder bed machine, the base of the machine frame which constitutes a continuation of the machine standard, is insufficient in and of itself'to support the machine with proper stability since it is small in base area and offset to one side of the stitching point.

The various supporting structures known in the prior art for supplementing the base of the machine time in sup porting cylinder or free arm sewing r n'achines'are disable for the flo'w of work fabrics around or they makeit necessary that the free'ai in a superelevated position in order 0 v v V requisite clearance space, which abnorm'allyhigh pos'i advantageous in that they eithergtninimiz'e the space availtion not only makes the machine more diificult a aawk ward to use but also raises thecenter of gravity of the machine with consequent. tendency toward. greater in stability.

prov de the? g and3 of the drawings illustrate one preferred form of the supporting. base constructed in accordance with this-in- It is an object of this invention to provide anovel supporting base for a portable sewing'machine, which sup:

porting base is particularly well adapted for usewith a free arm type sewing machine' It is. also anobject of this invention to provide-a? supporting base for a free arm type 's'ewingWmachine which does not detractfrom the space avtail-ableforjhe flow of work between the free arm andthes'ur'face upon which the machine is supported so that the freear'm need not be superelevated to compensateifot any loss of workspace beneath the arm occasioned by the presence of the supporting base. i

' With the above and other objects and advantages in view as willthereinafter appear, this invention comprises are: locked together to form, an integral standard unit from which the work supporting arm extends.

"This invention is not concerned with the particular form of-stitch forming mechanism of the sewing machine,

andltherefore, any conventional type of "stitch for" ng bracket arm'14. The needle cooperates in the formation of stitches with stitch forming mechanism (not shown) cari iedinthe work supporting arm, thefwork fabrics being pressed against a work feeding dog 17 in the work supporting arm' by a presser foot 18 carried by a presser bar l 9 supported in the bracket arm.

40f q This invention i'elatesto a novel supporting base con strufction effective to provide a stable snpport'jer the sewing machine when placed directly upon 'any fiat surface, such'as a table top, j'desk, counter, 'ete. f Figs. 1,2

ventionand Figs. 4, 5, 6 and 7 illustrate a slightly iiio'dified form of construction. 7 3 Referring to Figs. 1, 2 and 3, the supporting base orn prises a continuous member 25 of subetantiatl'y'unifei-ni .cross lse'ctional configurationand formed into, a closed loop. "Apair; of cross braces 26-46 are welded for? otherwise secured across the loop provided by the support member 25, which braces accommodate fastening bolts 27--27I by whichthe support member is fastened to the base'of the machine'frame beneath the standard.

In the drawingsa tubular support member of "circular V cross sectional shape is shown. The tubular form is ad-.

.vantageous for its lightnefs's particularly 'as applied as a portable sewing machine, and the "circular cross sectional I shape isprefer'able since itprovides for an e'as'y'fiow of the devices, combinations, 'and arrangements of parts hereinafter described and illustrated in the accompanying drawings of preferred embodiments thereof in which:

Fig. 1 is a front elevational viewof a sewing machine having applied thereto a supporting base embodying my invention. Fig. 2 represents a cross sectional view taken substantially along line 2-2 of Fig. 1 and illustrating the top 7 plan view of'the work supporting arm and the supporting baseof the sewingmachine. u Fig. .3 is a cross sectional view taken substantially work fabrics over the supporting base and minimizes interfererice and catching of buttons and other objects which may be associated with the fabrics being stitched, 'It will be appreciated, however, that this invention'is not necessarily limited to this preferred form and crosssectional configuration inasmuch as a solid support themher of non-circular cross section might also be used" effectively.

The supporting member 25 is formed in a fiat l" "p; that is, its under surfaces are co-plana'i', so that 06' illfi ous engagement will be made with any flat surface u on which the sewing machine may be placed. A plurality V of pads 29-49 of flexible cushioning material such as rubber, felt, or the like may, however, be affixed beneath the support member to prevent marring or scratching of the table top or other surfaces upon which the sewing machine may be placed. As illustrated in Fig. 3, the cushion pads 29-49 are formed each with a shank '30 adapted to be forced into an aperture provided on the under surface of the support member 25. Expansion of the shank 30 within the tubular support member 25 'will lock the cushion pad 29 in place.

Since the support member has the form of a flat loop, the under surface of the cushioning pads 29-29 are coplanar and define a plane of support YY for the sewing machine. Should the pads 29-29 be disposed with, the plane of support would coincide with the under surface of the support member 25 and, in any event, the support member '25 since it carrys the pads 29-29 can be said to define the plane of support YY. Fig. 2 is a plan view of the work supporting arm 11 of the sewing machine together with the supporting member 25 taken normal to the plane of support Y Y. The work supporting arm 11 of the sewing machine corresponds in Fig. 2 to its projection normal to the plane of support YY, and as illustrated in Fig. 2, the support member 25 is disposed completely outside the projection of the work supporting arm normal to the plane'of support. The loop formed by the support member thus defines an aperture which contains the projection'of the work supporting arm normal to the plane of support. In terms of the results of this form of construction, a machine supporting base is provided which leaves clear the. space beneath the work supporting arm; that is, the clearance space of passage of work fabrics beneath the work supporting arm 11 of the sewing machins is unaffected by the presence of the support member 25 andwould be no greater were the support member 25 to be removed entirely.

' Referring to Figs. l and 3, the support member 25 is preferably disposed beneath the-level of the work supporting arm of the sewing machine so that the work fabrics in passing around the free arm need not follow a torturous path in which they are apt to catch, snag or be otherwise impeded, but in which they may flow freely thus provides both stability of support for the sewing machine as well as a maximum of clearance, facilitating passage of fabrics around the work supporting arm of a cylinder bed sewing machine.

Having thus set forth the nature of the invention, what I claim herein is:

1. In combination with a sewing machine having a standard, a free ended work-supporting cylinder bed extending from said standard and adapted to accommodate tubular articles, said cylinder bed having an upper worksupporting surface and an under surface, and stitch forming instrumentalities carried by said standard and said cylinder bed defining a stitching point on said cylinder bed, a supporting base comprising a loop-shaped member secured to said standard and defining a plane of support for said sewing machine beneath the under surface of said cylinder bed, said member extending from said standard and disposed wholly outside the projected area of said work-supporting cylinder bed normal to said plane of support, and said member outwardly of the stitching point toward the free end of said cylinder bed extending from the plane of support only a portion of the distance between said plane of support and the under surface of said cylinder bed.

'2. In combination with a sewing machine having a standard, a free ended work-supporting cylinder bed extending from said standard and adapted to accommodate tubular articles, and stitch forming instrumentalities carried by said standard and said cylinder bed defining a stitching point on said cylinder bed, a supporting base comprising a member secured to said standard and defining a plane of support for said sewing machine, beneath said cylinder-bed, said member being formed to define an aperture encompassing the projected area of said work-supporting cylinder bed normal to said plane of PP 3. In combination with a sewing machine having a standard, a free ended work-supporting cylinder bed extending from said standard and adapted to accommodate tubular articles, said cylinder bed having an upper worksupporting surface and an under surface, and stitch about the arm. The support member'25, 'as illustrated in'these figures, extends vertically from the plane of support YY only a portion of the distance between the plane of support and the work supporting arm of the sewing machine.

Figs. 4, 5, 6 and 7 illustrate a slightly modified' form V of construction embodying this invention. In the modified form, a support member 35 in the form of a continuous U-shaped loop is used., The support member is preferably of tubular material with uniform cross sectional shape, one free extremity of the U-shapedsupport member being secured beneath the front'of the'machine frame base or standard and the other free extremity being secured beneath the rear thereof by fastening bolts 36-36. As illustrated in Fig. 7, the tubular support member 35 is apertured to receive the fastening bolts 36 and a washer 37 is provided on each fastening bolt 36. The washers 37 are preferably formed with the contour of the bore of the tubular support member. I

Cushioning pads 39-39 may be secured to the support member '35, as in the construction illustrated in Figs. 1, 2 and 3. The cushioning pads beneath the machine base 12 may, if desired, be fitted directly to the machine base itself, as illustrated in Figs. 4 and 5.

As in theembodiment illustrated in Figs. 1, 2 and 3, the forrn'illustrated in Figs. 4, 5, 6 and 7 provides a machine supporting hese extending outside the projection of the work supporting arm 11 normal to a plane of support YY defined by the supporting base 35, and the supporting base 35 occupies only a portion of the vertical distance between the plane of support Y-Y and the work'supporting arm 11.

The supporting base in accordance with this invention forming instrumentalities' carried by said standard and said cylinder bed defining a stitching point on said cylinder bed, a supporting base comprising a member secured to said standardand defining a plane of support for said sewingmachine, said memebr being formed with a loopshaped portion of substantially uniform cross-sectional shape extending from said standard to define an aperture encompassing the projected area of said work-supporting cylinder bed normal to said plane of support, and said member extending upwardly from the plane of support only a portion of the distance between said plane of support and the under surface of said cylinder bed.

4. The combination set forth in claim 2 in which the supporting base comprises a member having the form of a U-shaped' loop with spaced free extremities, and means for securing'each free extremity of said loop beneath said standard to define said aperture encompassing said i projected area "of the Work-supporting cylinder bed.

' 5. The combination set forth in claim 3 in which the supporting basecomprises a member having the form of a U-shaped loop with spaced free extremities shaped to encompass on three sides a space as large as that occupiedby the projectedarea of said work-supporting cylinder bed normal to'said plane of'support, and means for securing each free extremity of said loop beneath said standard to define said aperture encompassing said projected area of the work-supporting cylinder bed.

6. The combination set forth in claim 2 in which the supporting base comprises a member having the-form of a closed loop shaped to enclose a space larger than the projected area of said work-supporting cylinder bed normal to said plane of support, and means for securing said closed loop shaped member beneath said standard with said enclosed space encompassing said projected area of the Work-supporting cylinder bed.

7. The combination set forth in claim 3 in which the supporting base comprises a member having the form of a closed continuous loop shaped to encompass on all sides a space larger than that occupied by said projected area of said work-supporting cylinder bed on said plane of support, and means for securing said closed loop shaped member beneath said standard with said enclosed space 6 encompassing said projected area of the Work-supporting cylinder bed.

References Cited in the file of this patent UNITED STATES PATENTS 1,716,132 Hodgkinson June, 4, 1929 2,247,383 Hohmann et a1. July 1, 1941 2,424,872 Zonis July 29, 1947 2,637,919 Buchanan May 12, 1953

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