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US3253564A - Casing for sewing machine - Google Patents

Casing for sewing machine Download PDF

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Publication number
US3253564A
US3253564A US294703A US29470363A US3253564A US 3253564 A US3253564 A US 3253564A US 294703 A US294703 A US 294703A US 29470363 A US29470363 A US 29470363A US 3253564 A US3253564 A US 3253564A
Authority
US
United States
Prior art keywords
casing
base
pillar
sewing machine
web
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US294703A
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English (en)
Inventor
Gustin Giuliano
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fratelli Borletti SpA
Borletti SpA
Original Assignee
Borletti SpA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Borletti SpA filed Critical Borletti SpA
Application granted granted Critical
Publication of US3253564A publication Critical patent/US3253564A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B73/00—Casings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/06—Permanent moulds for shaped castings

Definitions

  • the casings of sewing machines are, as is known, made in a single-piece casting, the molten m-aterial from which the casing is to be made being teemed into a mold formed lfrom two mold halves interconnected along the medial longitudinal plane of the casing, with an internal core which reproduces the cavity of the casing.
  • This mode of procedure gives rise to the formation on the molded surfaces of lines of 'burring which need to be removed by accurate and expensive finishing operations 'before the casing is given a finishing treatment such as enamelling or varnishing.
  • these casings are also subjected to precise machining at some points in their interior, to provide pivots for bearings for elements of the mechanism of the sewing machine intended to be mounted within the casing. This treatment varies in accordance with the type of mechanism adopted.
  • the object of the present invention is to provide a casing that serves exclusively to support and interconnect the actual supports of various portions of the mechanism, eliminating any necessity for internal treatment, and, owing to the use of a special press in its manufacture, also eliminating the necessity for external finishing operations.
  • the casing can be passed direct to the finishing stage, e.g. for enamelling or varnishing, as soon as it'has been made.
  • the casing according to the invention is characterised by the features that it comprises a pillar which isl substantially of double T-form with the upright disposed transversely to the medial longitudinal plane and the arms diverging slightly from one another in the direction of the hand-wheel, the mounting being connected at its lower part with a base and at its upper part with an arm having at least one pair of adjacent surfaces which diverge only slightly in the direction of the hand-wheel with respect to the associated longitudinal axes, in such manner as to form two conical members projecting from the mounting and tapering towards their free ends.
  • the base terminates at its free end in a locating seat for the assembly comprising the feeding and hook mechanism, whilst the upper arm terminates at its free end in a ilange for the attachment of the head of the needle bar.
  • a mold constituted essentially by two parts that can inter-penetrate along the longitudinal axis of the casing and which define respectively the external and internal configurations of the casing.
  • withdrawal is effected by withdrawing in opposite senses the two principal parts of the press along a line that forms both with the horizontal working plane and with the medial longitudinal plane an angle half of that which is formed between the two facing, divergent and corresponding surfaces of the -base and of the arm.
  • FIG. l is a longitudinal section of a casing according to the invention of the type having a cylindrical base, along the line I-I of FIG. 4;
  • FIG. 2 is a similar section of the said casing contained within the mold, prior to withdrawal;
  • FIG. 2a illustrates the same parts of FIG. 2 after withdrawal, with the mold open
  • FIG. 3 is a view of the head of the casing from the handwheel side
  • FIG. 4 is another view of the head'from the opposite side
  • FIG. 5 is a sectional view of the casing on the line V-V of FIG. l;
  • FIGS. 6 to 10 are similar views corresponding respectively to FIGS. l, 2a and 3 to 5, of a modified form of casing with a ilat base, FIG. 10 being a sectional view of the casing on the line X-X of FIG. 6.
  • the pillar of the casing is substantially of double T section, the upright of which is constituted by a flat web 1 disposed transversely to the longitudinal axis of the casing and the two arms of which are asymmetrical with respect to the upright and constitute the two flat sides 2, 2. of the pillar, these diverging slightly from one another towards the side where the hand-wheel is intended to be arranged.
  • the upper arm 3 terminates in a flange 5 provided with a central aperture 6 for the passage of the control members of the needle bar and with four holes 7 for the attachment of the upper head.
  • Its upper surface 8 is horizontal, whilsty its lower surface 9 is inclined at an angle a so as to converge towards the upper surface in the direction of the flange 5.
  • the two lateral faces 1i) and Ill also converge towards one another in the direction of the flange 5, -but whilst the rear face 11 (relative to the operator of the sewing machine) is oblique relative to a perpendicular to the flange 5, the front face 10 is perpendicular to the flange 5.
  • the said faces are parallel respectively to the sides 2 and 2 of the pillar.
  • the base yd has an upper face 12 or working surface which is horizontal and a lower face 13 at least a part of which is oblique and converges towards the upper face in the direction of the free end of the base, whilst of the lateral faces 14 and 15 which converge -towards one another in the case of FIGS. l to 5 in the direction of the said free end, one of them, viz. the front face 14 is parallel and the'other, viz. the rear face 15, is inclined so that they are parallel respectively to the sides 2, 2 of the pillar, whereas they are substantially parallel to each other in the case of FIGS. 6 to 10.
  • the casing comprises in its general configuration tapered portions, an upper one 3 and a lower one 4, connected together by two sides 2, 2 which with the web 1 associated with them constitute the pillar of the machine.
  • the web 1 has an extension which is reduced in height relative to the sides 2, 2 and limited to the interval between the lower face 9 of the arm 3 and the upper face 12 of the base 4. These two faces terminate in their turn at a certain distance from the web 1 so as to leave between them and the diaphragm two passages for the connecting members of the mechanisms situated respectively in the base 4 and in the upper arm 3.
  • the working surface 12 is interrupted towards the free end of the arm 4 by a vertical wall 16 which delimits, with the lateral faces and the floor of the base, a seating 17 open at the 4free end of the arm and intended for the reception of the assembly associated with the feeding mechanism and the hook, the control members of Which pass through the aperture 18 provided in the wall 16.
  • the said Hoor is formed, in the case of FIGS. 1 to 5, by a part 20 which is level internally so as to be horizontal, of the lower inclined face 13 of the base, whilst in the case of FIGS. 6 to 10 it is formed by a horizontal portion 13 of the lower face, which is provided externally with reinforcing ribs 21.
  • the face 13 has, substantially beneath the web 1, a step 22 provided with holes 23 which together with perforated bosses 24 on the web 1 serve for the fixing of the driving members in the casing, whilst the holes 25 in the web 1 serve for the fixing of the automatic control ⁇ members and for supporting the members that connect the mechanisms of the arms to those of the base.
  • the embodiment of FIGS. 1 to 5 alsocomprises four holes 26 for the attachment of a lower supporting plate (not illustrated) for the machine.
  • the holes 26, like the holes 7, 19, 23, 2S, the perforated bosses 24 and the apertures 6 and 18 are formed in the casting operation and do not require any special manufacturing step.
  • a mold constituted by two parts only (FIGS. 2 and 2a) viz. a part 27 on which are reproduced all the external contours of the casting and the external fixing surfaces, and a part 28 which defines the whole of the internal cavity of the casting and the inner fixing surfaces. Withdrawal for the purpose of separating these two parts takes place in a longitudinal direction x-x which is inclined at an angle ot/2 both in a vertical plane and in a horizontal plane relative to the longitudinal axis of the casing.
  • a mold in which in addition to the part 2S (FIG. 7) that defines the internal cavity and the internal fixing surfaces, there are provided two -parts ⁇ 29 and 30 of which the first part 29 defines the whole of the external configuration and the external fixing surfaces situated above the lower face of the base, and the other part 30 defines the lower face of the base with the ribs 21 and the step 22.
  • a casing for a sewing machine comprising a base, a pillar extending vertically from the right-hand side of the base, the pillar having .a cross section in a horizontal plane which is substantially of I shape, an upper arm projecting laterally from the left-hand side of the pillar and overlying the base, the I section of the pillar comprising a web and two flanges, the web transecting a medial longitudinal vertical plane of the casing and said flanges being disposed on opposite sides of said plane and diverging from one another toward the right-hand side of the pillar, said base and said upper arm having opposite faces that diverge from each other toward the right-hand side of the pillar whereby said base and said upper arm taper toward the left toward their free ends, the divergent outer surfaces of said iianges and opposite faces having bisecting lines that are substantially parallel to each other.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
US294703A 1962-07-12 1963-07-12 Casing for sewing machine Expired - Lifetime US3253564A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT1397062 1962-07-12

Publications (1)

Publication Number Publication Date
US3253564A true US3253564A (en) 1966-05-31

Family

ID=11144752

Family Applications (1)

Application Number Title Priority Date Filing Date
US294703A Expired - Lifetime US3253564A (en) 1962-07-12 1963-07-12 Casing for sewing machine

Country Status (4)

Country Link
US (1) US3253564A (it)
CH (1) CH406808A (it)
FR (1) FR1361818A (it)
GB (1) GB1043188A (it)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4193361A (en) * 1978-12-21 1980-03-18 The Singer Company Sewing machine construction utilizing subassemblies
DE2839090A1 (de) * 1978-09-08 1980-03-20 Dorina Naehmasch Naehmaschinengehaeuse
US4628845A (en) * 1984-12-22 1986-12-16 Maruzen Sewing Machine Co., Ltd. Assembly construction for sewing machine
US4651661A (en) * 1984-12-22 1987-03-24 Maruzen Sewing Machine Co., Ltd. Assembly construction for sewing machine
CN102784884A (zh) * 2012-09-05 2012-11-21 襄汾县荣世达机械制造有限公司 缝纫机连体化铸造方法

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1641923A (en) * 1925-09-18 1927-09-06 Davis George Howlett Molding apparatus and method
US1748250A (en) * 1924-08-18 1930-02-25 Ferdinand J Spang Molding device
US2411459A (en) * 1943-02-23 1946-11-19 Singer Mfg Co Sewing machine frame
US2526481A (en) * 1948-04-06 1950-10-17 Richard K Hohmann Sewing-machine frame
US2658465A (en) * 1950-01-28 1953-11-10 Stehr George Sewing machine housing
US2724355A (en) * 1952-03-05 1955-11-22 Pfaff Ag G M Sewing machine heads
US2879734A (en) * 1955-09-09 1959-03-31 Singer Mfg Co Portable bases for miniature sewing machines
US3012532A (en) * 1958-02-03 1961-12-12 Leslie Ivan Alexander Sewing machines

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1748250A (en) * 1924-08-18 1930-02-25 Ferdinand J Spang Molding device
US1641923A (en) * 1925-09-18 1927-09-06 Davis George Howlett Molding apparatus and method
US2411459A (en) * 1943-02-23 1946-11-19 Singer Mfg Co Sewing machine frame
US2526481A (en) * 1948-04-06 1950-10-17 Richard K Hohmann Sewing-machine frame
US2658465A (en) * 1950-01-28 1953-11-10 Stehr George Sewing machine housing
US2724355A (en) * 1952-03-05 1955-11-22 Pfaff Ag G M Sewing machine heads
US2879734A (en) * 1955-09-09 1959-03-31 Singer Mfg Co Portable bases for miniature sewing machines
US3012532A (en) * 1958-02-03 1961-12-12 Leslie Ivan Alexander Sewing machines

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2839090A1 (de) * 1978-09-08 1980-03-20 Dorina Naehmasch Naehmaschinengehaeuse
US4193361A (en) * 1978-12-21 1980-03-18 The Singer Company Sewing machine construction utilizing subassemblies
US4628845A (en) * 1984-12-22 1986-12-16 Maruzen Sewing Machine Co., Ltd. Assembly construction for sewing machine
US4651661A (en) * 1984-12-22 1987-03-24 Maruzen Sewing Machine Co., Ltd. Assembly construction for sewing machine
CN102784884A (zh) * 2012-09-05 2012-11-21 襄汾县荣世达机械制造有限公司 缝纫机连体化铸造方法

Also Published As

Publication number Publication date
CH406808A (it) 1966-01-31
FR1361818A (fr) 1964-05-22
GB1043188A (en) 1966-09-21

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