US3677210A - Sewing machine with base extension - Google Patents

Abstract

A base member for converting a cylindrical base sewing machine into one having a flat base, said member including a built-in accessory drawer.

Description

United States Patent Perlino 1 July 18, 1972 [s41 SEWING MACHINE WITH BASE [56] References Clted EXTENSION UNITED STATES PATEN'IS r 3,013,514 12/1961 Stanton ..112/260 [72] Inventor: Silvano Perlino, Pavia, Italy 343,774 6/1886 Moore ..312/330 X [73] Assignee: Necchl S.p.A., Pavia, Italy FOREIGN PATENTS ORAPPLlCATlONS [22] Filed: July 6,1970 1,189,988 4/1970 Great Britain ..312/330 195,047 3/1938 Switzerland ...l12/260 [21] APPI- 52,427 990,050 4/1965 Great Britain ..112/260 Primary Examiner-Jordan Franklin [30] Foreign A lj fl m m Data Assistant Examiner-George H. Krizmanich Attorney-Stevens, Davis, Miller & Mosher July 21, 1969 Italy ..32415 A [57] ABSTRACT A base member for converting a cylindrical base sewing mac nemto one avlnga at ase,sa1 mem rlncu mga [52] US Cl 112/258 hi h n b be l E Int. Cl- ..D05b builbin accessory drawer.

Field oISearch ..112/258, 260, 217.1; 312/330,

JIIII/JIIHIII 5 Claims, 8 Drawing Figures Patented July 18, 1972 3,677,210

3 Sheets-Sheet l "INN" INVENTOR SILVANO PERLINO WQ MM ATTORNEYS Patented July 18, 1972 3,677,210

3 Sheets-Sheet 5 19 g9 as 41 5 v .31 29 20 29 .30 J5 J3 J4 5 SEWING MACHINE WITH BASE EXTENSION The present invention relates to cylindrical base type sewing machines and specifically to a base extension therefor whereby the cylindrical base is converted into a flat base.

An object of the invention is the realization of a simple and economical means for realizing the aforementioned conversion and also for providing an accessory drawer in such a sewing machine.

V A specific advantage of the base member according to this invention is its simplicity of construction and consequent low cost relative to heretofore known analogous base members.

The objects of this invention generally are realized through the expedient of using a bent sheet material upon which are provided guide and locking means for a drawer. Further, said guide and locking means are realized through bending and shearing operations performed upon the sheet material.

In order to form the base member from a plate member upon which shearing operations have been performed, successive bending operations are effected to obtain:

a base having an upper wall which in turn has a first portion adapted to come laterally adjacent to the upper wall of the sewing machine cylindrical base;

the base upper wall having a second portion adapted to register with the free end of said cylindrical base, this second portion having a width equal to the width of the first portion combined with the width of the upper wall of the cylindrical base;

a vertical surface connected with said upper wall and having a guide groove along its entire lower lengthwise extent, for an accessory drawer;

a second vertical surface as long as said upper wall second portion;

a lower horizontal wall as long as said upper wall second portion of which it is a continuation;

a T-shaped groove centrally in said lower horizontal wall, previously formed by a shearing operation, which groove serves as a further guide and as a locking means for the accessory drawer which is fitted through the free end of the base member into the space defined between the vertical and horizontal walls of said member, a vertical wall of said drawer thereby closing the open end of said base member.

Not mentioned advantages and objects of the invention will be clearly seen from the following description which is referred to the accompanying drawings, wherein:

FIG. 1 is an isometric view of a sewing machine having the inventive base attachment applied thereto;

FIG. 2 is an end elevation view of the inventive base attachment;

FIG. 3 is a plan view of the inventive base attachment showing the guide and locking means for the drawer;

FIG. 4 illustrates the drawer in its position for being removed from the base attachment;

FIG. 5 illustrates the position of the drawer so that it may be pulled out to an open position without being detached from the base member;

FIGS. 6, 7, and 8 are respective detail views showing different positions of the guide means and the cooperating means on the drawer, corresponding respectively to the working positions illustrated in FIGS. 3, 4, and 5.

Referring to the drawings, the machine base plate 10 supports the machine 11 which comprises in usual fashion a cylindrical horizontal base 12 from which vertically extends a standard 13 which in turn supports a horizontal upper arm 14 generally parallel to base 12. A sewing head 15 at the free end of arm 14 encloses the members which drive needle bar 16 and presser bar 17.

The present invention refers specifically to base attachment member 18 which serves as a base extension member for converting the cylindrical base l2 to a flat or planar base. Accessory drawer I9 is incorporated within said extension member 18.

According to the preferred mode of realization as illustrated in the drawings, the member 18 is of a plate material which has undergone successive bending operations to present (see FIGS. 1 and 2) an upper wall 20 having two portions 21 and 22 of difierent width, a vertical wall 27, a lower wall 31, and a second vertical wall 32.

Side 23 of smaller width portion 21 lies adjacent to side 24 of the cylindrical base I2 when the base member is in working position, while the side 25 of the larger width portion 22 lies adjacent to end wall 26 of the base 12. Portion 22 is equal to the combined widths of base 12 and portion 21. A retaining element 40, in a known and not shown manner, locks the base member 18 to the base 12.

Vertical wall 27 (FIGS. 2, 3, 4, and 5) is faired into upper wall 20 and includes a guide channel 28 along its entire lower lengthwise extent, in which channel a sliding member 29 is engaged. The sliding drawer member 29 is located along the lower portion of the drawer l9 and forms a continuation of the drawer vertical wall 30.

The other vertical wall 32 of the base member, which also is faired into upper wall 20, continues along its lower extent to form the lower wall 31 parallel to upper wall 20. Said lower wall 31 includes a T-shaped groove 33 which serves as a further guide means and locking means for the drawer l9. Said groove 33 is engaged by a first projection 34 on the lower wall 35 of the drawer I9 and further by a rectangular second projection 36 in said lower wall 35.

Said first projection 34 (FIGS. 3 to 8) comprises a rectangular web 37 ending in a larger rectangular wing portion 38. Said root 37 and said second projection 36 are both of lesser width than the groove 33 while the wing portion 38 is wider than the groove normally provided therefore, a means adapted to couple drawer 19 to base member 18.

The wing portion 38, however, is smaller in cross-section than the enlarged end opening 39 of groove 33 so that the wing portion 38 can be disengaged from the groove to enable complete detachment and removal of the drawer from the base member 18, as illustrated in FIGS. 4 and 8.

The second projection 36, which is longitudinally aligned with the groove 33, falls into said groove and abuts against first wall 42 thereof when the drawer is fully inserted into base member 18, and serves to prevent unwanted opening of said drawer, as by vibration during operation of the machine. In the fully closed position, end wall 41 of drawer 19 serves to close the open end of the base member 18. In order to open the drawer it is only necessary to first lift the front end thereof, as shown in FIG. 5, so as to lift projection 36 out of groove 33.

In order to completely detach and remove the drawer, it is only necessary to push it in all the way and to lift the rear end thereof, as shown in FIG. 4, so as to lift the wing portion 38 out of opening 39 in groove 33. The drawer may then be pulled outwardly avoiding, however, any interference between projection 36 and the groove 33.

When the base member 18 is mounted on the sewing machine, the latching means 40 engages a suitable, not shown, seat on cylindrical base 12 while side 25 of upper wall portion 21 comes to rest against edge 24 of the base 12, and finally the entire lengthwise extent of channel 28 rests against the upper surface of the machine base plate 10. v

Various details presented herein are of course merely exemplary of the possible modes of realizing the inventive concept which can be realized and applied to structural arrangements other than that illustrated herein.

I claim:

1. A sewing machine having a cylinder type horizontal base from which upwardly extends the machine standard, a flat base plate, said cylindrical base being supported upon the upper surface of flat base plate, an extension member mountable upon said base plate and shaped so as to complement the contours of said cylindrical base, the upper surface of said extension member forming a flat complementary surface extent of said cylindrical base, guide means formed in said extension member and a drawer slidably mounted on said means, said extension member being formed of a bendable sheet material and including successive walls bent perpendicularly to each other, and defining an opening at one end of the member, said guide means comprising a channel formed along the longitudinal extent of the corner formed between two mutually perpendicular walls of said extension member, a'first projection on said drawer fitted within said channel to slide therealong pursuant to sliding of said drawer in said extension member, said guide means further comprising a longitudinally extending slot cut out of said sheet material, a second projection on said drawer lockingly engaged in said slot, said drawer including an outer verticalwall whose periphery conforms to that of said opening defined at an end of said extension member and through which said drawer is inserted into said member.

2. The machine of claim 1, a third projection on said drawer in longitudinal alignment with said slot and engageable therewith and abuttable against an end wall thereof when the drawer is in fully closed position, the drawer being liftable to discharge the third projection from said slot whereby said drawer may be pulled outwardly from said extension member.

3. The machine of claim 1, said second projection being T- shaped, the web portion thereof being smaller than the width of said slot and the wing portion thereof being larger than the width of said slot whereby said second projection is free to slide longitudinally along said slot but is arrested from vertical movement relative to said slot by said wing portion abutting against the sides defining said slot.

4. The member of claim 3, one end ofsaid slot including an opening large enough to permit vertical withdrawal of said second projection wing portion therethrough, the drawer being liftable in said member so as to lift said wing portion out of said slot through said opening.

5. The extension member of claim 4, said first projection comprising a longitudinally extending channel bent formed in said plate along a corner at which two walls of said member perpendicularly meet each other, said drawer including a projection means slidably engageable in said channel.

Claims (5)

1. A sewing machine having a cylinder type horizontal base from which upwardly extends the machine standard, a flat base plate, said cylindrical base being supported upon the upper surface of flat base plate, an extension member mountable upon said base plate and shaped so as to complement the contours of said cylindrical base, the upper surface of said extension member forming a flat complementary surface extent of said cylindrical base, guide means formed in said extension member and a drawer slidably mounted on said means, said extension member being formed of a bendable sheet material and including successive walls bent perpendicularly to each other, and defining an opening at one end of the member, said guide means comprising a channel formed along the longitudinal extent of the corner formed between two mutually perpendicular walls of said extension member, a first projection on said drawer fitted within said channel to slide therealong pursuant to sliding of said drawer in said extension member, said guide means further comprising a longitudinally extending slot cut out of said sheet material, a second projection on said drawer lockingly engaged in said slot, said drawer including an outer vertical wall whose periphery conforms to that of said opening defined at an end of said extension member and through which said drawer is inserted into said member.

2. The machine of claim 1, a third projection on said drawer in longitudinal alignment with said slot and engageable therewith and abuttable against an end wall thereof when the drawer is in fully closed position, the drawer being liftable to discharge the third projection from said slot whereby said drawer may be pulled outwardly from said extension member.

3. The machine of claim 1, said second projection being T-shaped, the web portion thereof being smaller than the width of said slot and the wing portion thereof being larger than the width of said slot whereby said second projection is free to slide longitudinally along said slot but is arrested from vertical movement relative to said slot by said wing portion abutting against the sides defining said slot.

4. The member of claim 3, one end of said slot including an opening large enough to permit vertical withdrawal of said second projection wing portion therethrough, the drawer being liftable in said member so as to lift said wing portion out of said slot through said opening.

5. The extension member of claim 4, said first projection comprising a longitudinally extending channel bent formed in said plate along a corner at which two walls of said member perpendicularly meet each other, said drawer including a projection means slidably engageable in said channel.

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