US3633527A - Toy sewing machine capable of switching between zigzag stitch forming and straight stitch forming operations - Google Patents
Toy sewing machine capable of switching between zigzag stitch forming and straight stitch forming operations Download PDFInfo
- Publication number
- US3633527A US3633527A US47671A US3633527DA US3633527A US 3633527 A US3633527 A US 3633527A US 47671 A US47671 A US 47671A US 3633527D A US3633527D A US 3633527DA US 3633527 A US3633527 A US 3633527A
- Authority
- US
- United States
- Prior art keywords
- bar
- actuation
- stitch forming
- reciprocating motion
- pin
- 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
Links
Images
Classifications
-
- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B19/00—Programme-controlled sewing machines
Definitions
- Altorne vStevens, Davis, Miller & Mosher ABSTRACT A toy sewing machine capable of switching between zigzag stitch forming and straight stitch forming operations comprising a machine body, a rotary main shaft, a needle bar mounting a sewing needle and connected to said rotary main shaft for reciprocating motion in a vertical plane, a pivotal member connected to said machine body for pivotal motion in a horizontal plane and formed with an axial center bore for permitting said needle bar to loosely extend therethrough, an actuation bar connected to said pivotal member for reciprocating motion in a horizontal plane, oscillating mechanism for causing said actuation bar to move in reciprocating motion in a horizontal plane in conjunction with the reciprocating motion of said needle bar, a mechanism for switching between a zigzag stitch forming operation and a straight by controlling the engagement of said actuation bar with said oscillating mechanism, a swinging mechanism connected to said actuation bar for repeated angular rotation to right and left as said actuation bar moved in reciprocating motion in a horizontal plane,
- This invention relates to toy sewing machines which are capable of switching between zigzag stitch forming and straight stitch forming operations. More particularly, the invention is concerned with a toy sewing machine which is provided with means for switching between a zigzag stitch forming operation and a straight stitch forming operation, and means for synchronizing the operation of an elevational needle bar and a looper.
- An object of this invention is to provide a toy sewing machine which is provided with a mechanism for switching between zigzag stitch forming and straight stitch forming operations comprising a pivotal member pivotally movable in a horizontal plane and formed with an axial center bore through which loosely extends an elevational needle bar connected to a rotary main shaft and adapted to move in reciprocating motion in a vertical plane, an actuation bar con nected at one end thereof to a free end of the pivotal member and capable of moving in reciprocating motion in a horizontal plane parallel to the machine body, said actuation bar being urged to move in one direction in a horizontal plane by a spring and adapted to engage at the other end thereof an oscillating member coupled to the rotary main shaft for oscillating motion so as to permit the actuation bar to move in reciprocating motion in a horizontal plane, and means for controlling the engagement of the other end of the actuation bar with the oscillating member.
- Another object of the invention is to provide a toy sewing machine provided with means for synchronizing the operations of the elevational needle bar and a looper which permits a looper shaft to operate in synchronism with the operation of the actuation bar adapted to move in reciprocating motion in a horizontal plane in conjunction with the reciprocating motion of the elevational needle bar.
- FIG. I is a schematic side view of the toy sewing machine according to this invention in explanation thereof;
- FIG. 2 is a plan view of the toy sewing machine of FIG. 1;
- FIG. 3 is a sectional view along the line IIIIII ofFIG. l.
- the toy sewing machine as shown in the drawings comprises a machine body 1 which mounts a main shaft 2 driven by a suitable drive means for rotation in a predetermined direction.
- a needle bar 4 Connected to one end of the main shaft 2 through a crank mechanism 3 is a needle bar 4 which is adapted to move in reciprocating motion in a vertical plane with respect to the machine body 1.
- the needle bar 4 is loosely fitted in a vertical axial center bore formed in a pivotal member 6 supported by a supporting shaft 5 secured to the machine body 1 for pivotal motion in a horizontal plane.
- the pivotal member 6 is formed on one side thereof with a projection which serves as a connecting portion 7 for pivotally supporting, through a pin 9, one end of an actuation bar 8 mounted in parallel relation with the main shaft 2.
- the actuation bar 8 is supported near the other end thereof by an oscillating member 10.
- the oscillating member 10 which is supported by a shaft 11 secured to the machine body I for oscillating motion in a horizontal plane is formed in its central portion with a cam opening 12 which receives therein an eccentric cam 13 supported by the shaft of a gear 14 which is maintained in meshing engagement with a crown gear 15 mounted on the main shaft 2.
- the guide opening 17 consists of an opening section 17' for a straight stitch forming operation which has a major dimension portion extending axially or in a direction of horizontal reciprocating motion of the actuation bar 8 and curved slightly arcuately to conform to the locus of movement of the pin 16, and an opening section 17 for a zigzag stitch forming operation which has a major dimension portion disposed at right angles to the longitudinal axis of the actuation bar on one side of the opening section 17' and contiguous therewith, the opening sections 17' and 17" being arranged substantially in T-shape.
- a spring 18 connected at one end to the machine body 1 is connected at the other end to one side of the actuation bar 8 so as to normally urge the actuation bar 8 to rotate about the shaft 9 in the direction of an arrow 19.
- the actuation bar 8 is formed on the other side of the other end thereof with a concaved surface portion 20, convexed surface portion 21 and beveled surface portion 22 interposed between the two surface portions 20 and 21.
- the three surface portions function as switching operation surfaces.
- a switching cam 24 rotatably supported by a shaft secured to the machine body 1 and provided with a knob 23 is disposed against the surfaces 20, 21 and 22.
- a swinging shaft 25 which supports at its upper end one end of an oscillating plate 26 which is adapted to move in oscillating motion in a horizontal plane.
- a pin 27 which is received in a slot 28 formed in the actuation bar 8 and arranged with its major dimension portion disposed at right angles to the longitudinal axis of the actuation bar 8.
- crank member 29 which is formed with a projection 29' engageably received in a groove 31' of a grooved pulley 31 firmly secured to a looper rotating shaft 30 mounted below the machine body 1 for reciprocating motion in a horizontal direction.
- the shaft 30 is connected to the main shaft 2 through a gear train, consisting of gears 32, 34, 36, 38 to be driven thereby.
- the pin 16 provided on the oscillating member 10 is normally received in the opening section 17" of the guide opening 17 because the operation bar 8 is urged to move in the direction of the arrow 19 by the biasing force of the spring 18.
- the switching cam 24 is maintained in engagement with the concaved surface portion 20 of the actuation bar 8.
- the needle bar 4 is caused by the crank 3 to move in reciprocating motion in a vertical plane with respect to the machine body 1 while loosely extending through the axial center bore formed in the pivotal member 6.
- the rotation of the main shaft 2 is transmitted through the crown gear 15 to the eccentric cam 13 which presses against the inner wall of the cam opening 12, so that the oscillating member 10 moves in oscillating motion about the shaft 11, thereby causing the actua tion bar 8 to move in reciprocating motion in a horizontal plane in a predetermined stroke.
- the reciprocating movements of the actuation bar 8 cause the pivotal member 6 connected to the actuation bar to move in pivotal motion about the supporting shaft 5 in a horizontal plane. This permits the needle bar 4, which is moving in reciprocating motion in a vertical plane, to move simultaneously in pivotal motion such that it causes the needle to form zigzag stitches instead of straight stitches.
- the oscillating plate 26 moves in oscillating motion about the swinging shaft 25 so as to cause the swinging shaft 25 to rotate angularly to right and left repeatedly in synchronism with the reciprocating motion of the actuation bar 8.
- the crank member 29 at the lower end of the shaft 25 causes the looper shaft 30 to move in reciprocating motion to right and left in FIG. 1 in a horizontal plane.
- the present invention makes it possible to maintain the needle and looper at proper relative positions at all times since means is provided to bring the reciprocating movements of the actuation bar or the oscillating movements of the needle bar for permitting the needle bar to perform a zigzag stitch forming operation into synchronism with the reciprocating movements of the looper shaft.
- the synchronizing means of this invention is highly efficient and yet simple construction for use with toy zigzag sewing machines.
- a sewing machine especially suited as a toy sewing machine, capable of forming straight or zigzag stitching, comprising: a main rotary drive shaft drivingly engaged with a reciprocating needle bar, a rotary looper shaft for cooperating with said needle bar to sew stitches, said drive shaft being arranged to rotate said looper shaft and to reciprocate said needle bar synchronously with each other, and oscillatory means to oscillate said needle bar in a plane perpendicular to its direction of reciprocation and to correspondingly oscillate said looper shaft so as to sew zigzag stitches, said oscillatory means comprising a rotary cam driven by said main shaft, a first member adapted to be acted on by said cam to oscillate in a said plane and connected to said needle bar and also to said looper shaft so as to correspondingly oscillate said needle bar and looper shaft, a single actuation means for selectively effectively connecting of disconnecting said first member relative to said cam whereby actuation of said single actuation means by the operator renders operable or inopera
- a toy sewing machine capable of switching between zigzag stitch forming and straight stitch forming operations comprising a machine body, a rotary main shaft rotatably secured to said machine body, a needle bar mounting a sewing needle at its forward end and connected to said rotary main shaft for reciprocating motion in a vertical plane with respect to said machine body, a pivotal member connected to said machine body for pivotal motion in a horizontal plane and formed with an axial center bore for permitting said needle bar to loosely extend therethrough, an actuation bar connected at one end thereof to the free end of said pivotal member for oscillating motion of said pivotal member in a horizontal plane, oscillating mechanism for causing said actuation bar to move in reciprocating motion in a horizontal plane along its longitudinal axis in conjunction with the reciprocating motion of said needle bar in a vertical plane, a mechanism for switching between a zigzag stitch forming operation and a straight stitch forming operation by controlling the engagement of said actuation bar with said oscillating mechanism, a swinging mechanism connected to said actuation
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Sewing Machines And Sewing (AREA)
Abstract
A toy sewing machine capable of switching between zigzag stitch forming and straight stitch forming operations comprising a machine body, a rotary main shaft, a needle bar mounting a sewing needle and connected to said rotary main shaft for reciprocating motion in a vertical plane, a pivotal member connected to said machine body for pivotal motion in a horizontal plane and formed with an axial center bore for permitting said needle bar to loosely extend therethrough, an actuation bar connected to said pivotal member for reciprocating motion in a horizontal plane, oscillating mechanism for causing said actuation bar to move in reciprocating motion in a horizontal plane in conjunction with the reciprocating motion of said needle bar, a mechanism for switching between a zigzag stitch forming operation and a straight by controlling the engagement of said actuation bar with said oscillating mechanism, a swinging mechanism connected to said actuation bar for repeated angular rotation to right and left as said actuation bar moved in reciprocating motion in a horizontal plane, a looper shaft connected to said swinging mechanism for reciprocating motion in a horizontal plane as said swinging mechanism repeatedly rotates angularly and a looper mounted at said looper shaft for cooperation with said needle.
Description
United States Patent [72] Inventor Sakae Kasai Nakakoma-gun, Japan [21] AppLNo. 47,671 i [22] Filed June 19, 1970 [45] Patented Jan. 11, 1972 73] Assignee Crystal Sewing Machine Ind. Co., Ltd.
Tokyo, Japan [32] Priorities June 26, 1969 [33] Japan June 26, 1969, Japan, No. 44/60011 [54] TOY SEWING MACHINE CAPABLE OF SWITCHING BETWEEN ZIGZAG STITCH FORMING AND STRAIGHT STITCH FORMING OPERATIONS 2 Claims, 3 Drawing Figs.
[52] US. Cl 112/159 [50] Field ofSearch 112/159 [56] References Cited UNITED STATES PATENTS 986,354 3/1911 Brown 112/159 2,028,016 1/1936 Schweiger... 112/159 2,045,340 6/1936 Bolter 112/159 2,690,723 10/1954 Sudo Primary Examiner-Richard J. Scanlan, Jr. Altorne vStevens, Davis, Miller & Mosher ABSTRACT: A toy sewing machine capable of switching between zigzag stitch forming and straight stitch forming operations comprising a machine body, a rotary main shaft, a needle bar mounting a sewing needle and connected to said rotary main shaft for reciprocating motion in a vertical plane, a pivotal member connected to said machine body for pivotal motion in a horizontal plane and formed with an axial center bore for permitting said needle bar to loosely extend therethrough, an actuation bar connected to said pivotal member for reciprocating motion in a horizontal plane, oscillating mechanism for causing said actuation bar to move in reciprocating motion in a horizontal plane in conjunction with the reciprocating motion of said needle bar, a mechanism for switching between a zigzag stitch forming operation and a straight by controlling the engagement of said actuation bar with said oscillating mechanism, a swinging mechanism connected to said actuation bar for repeated angular rotation to right and left as said actuation bar moved in reciprocating motion in a horizontal plane, a looper shaft connected to said swinging mechanism for reciprocating motion in a horizontal plane as said swinging mechanism repeatedly rotates angularly and a looper mounted at said looper shaft for cooperation with said needle.
2Q w 34 Ezra 4 j so 3 I m 32 PATENTED JAN! 1 I972 A TTORNE Y 5 TOY SEWING MACHINE CAPABLE OF SWITCHING BETWEEN ZIGZAG STITCH FORMING AND STRAIGHT STITCH FORMING OPERATIONS This invention relates to toy sewing machines which are capable of switching between zigzag stitch forming and straight stitch forming operations. More particularly, the invention is concerned with a toy sewing machine which is provided with means for switching between a zigzag stitch forming operation and a straight stitch forming operation, and means for synchronizing the operation of an elevational needle bar and a looper.
An object of this invention is to provide a toy sewing machine which is provided with a mechanism for switching between zigzag stitch forming and straight stitch forming operations comprising a pivotal member pivotally movable in a horizontal plane and formed with an axial center bore through which loosely extends an elevational needle bar connected to a rotary main shaft and adapted to move in reciprocating motion in a vertical plane, an actuation bar con nected at one end thereof to a free end of the pivotal member and capable of moving in reciprocating motion in a horizontal plane parallel to the machine body, said actuation bar being urged to move in one direction in a horizontal plane by a spring and adapted to engage at the other end thereof an oscillating member coupled to the rotary main shaft for oscillating motion so as to permit the actuation bar to move in reciprocating motion in a horizontal plane, and means for controlling the engagement of the other end of the actuation bar with the oscillating member.
Another object of the invention is to provide a toy sewing machine provided with means for synchronizing the operations of the elevational needle bar and a looper which permits a looper shaft to operate in synchronism with the operation of the actuation bar adapted to move in reciprocating motion in a horizontal plane in conjunction with the reciprocating motion of the elevational needle bar.
Additional objects as well as features and advantages of the present invention will become evident from the description set forth hereinafter when considered in conjunction with the accompanying drawings, wherein:
FIG. I is a schematic side view of the toy sewing machine according to this invention in explanation thereof;
FIG. 2 is a plan view of the toy sewing machine of FIG. 1; and
FIG. 3 is a sectional view along the line IIIIII ofFIG. l.
The toy sewing machine as shown in the drawings comprises a machine body 1 which mounts a main shaft 2 driven by a suitable drive means for rotation in a predetermined direction. Connected to one end of the main shaft 2 through a crank mechanism 3 is a needle bar 4 which is adapted to move in reciprocating motion in a vertical plane with respect to the machine body 1. The needle bar 4 is loosely fitted in a vertical axial center bore formed in a pivotal member 6 supported by a supporting shaft 5 secured to the machine body 1 for pivotal motion in a horizontal plane. The pivotal member 6 is formed on one side thereof with a projection which serves as a connecting portion 7 for pivotally supporting, through a pin 9, one end of an actuation bar 8 mounted in parallel relation with the main shaft 2. The actuation bar 8 is supported near the other end thereof by an oscillating member 10.
The oscillating member 10 which is supported by a shaft 11 secured to the machine body I for oscillating motion in a horizontal plane is formed in its central portion with a cam opening 12 which receives therein an eccentric cam 13 supported by the shaft of a gear 14 which is maintained in meshing engagement with a crown gear 15 mounted on the main shaft 2.
Provided on the upper surface of the end portion of the oscillating member 10 which supports the actuation bar 8 near the other end thereof is a pin 16 which is received in a guide opening 17 formed in the actuation bar 8 near the other end thereof. The guide opening 17 consists of an opening section 17' for a straight stitch forming operation which has a major dimension portion extending axially or in a direction of horizontal reciprocating motion of the actuation bar 8 and curved slightly arcuately to conform to the locus of movement of the pin 16, and an opening section 17 for a zigzag stitch forming operation which has a major dimension portion disposed at right angles to the longitudinal axis of the actuation bar on one side of the opening section 17' and contiguous therewith, the opening sections 17' and 17" being arranged substantially in T-shape.
A spring 18 connected at one end to the machine body 1 is connected at the other end to one side of the actuation bar 8 so as to normally urge the actuation bar 8 to rotate about the shaft 9 in the direction of an arrow 19.
The actuation bar 8 is formed on the other side of the other end thereof with a concaved surface portion 20, convexed surface portion 21 and beveled surface portion 22 interposed between the two surface portions 20 and 21. The three surface portions function as switching operation surfaces.
A switching cam 24 rotatably supported by a shaft secured to the machine body 1 and provided with a knob 23 is disposed against the surfaces 20, 21 and 22.'Mounted to the machine body 1 is a swinging shaft 25 which supports at its upper end one end of an oscillating plate 26 which is adapted to move in oscillating motion in a horizontal plane. Provided on the upper surface of the other end of the oscillating plate 26 is a pin 27 which is received in a slot 28 formed in the actuation bar 8 and arranged with its major dimension portion disposed at right angles to the longitudinal axis of the actuation bar 8. Provided at the lower end portion of the swinging shaft 25 is a crank member 29 which is formed with a projection 29' engageably received in a groove 31' of a grooved pulley 31 firmly secured to a looper rotating shaft 30 mounted below the machine body 1 for reciprocating motion in a horizontal direction. The shaft 30 is connected to the main shaft 2 through a gear train, consisting of gears 32, 34, 36, 38 to be driven thereby.
The operation of the present invention will now be described. As shown in FIG. 2, the pin 16 provided on the oscillating member 10 is normally received in the opening section 17" of the guide opening 17 because the operation bar 8 is urged to move in the direction of the arrow 19 by the biasing force of the spring 18. The switching cam 24 is maintained in engagement with the concaved surface portion 20 of the actuation bar 8.
If the main shaft 2 is rotated at this time, the needle bar 4 is caused by the crank 3 to move in reciprocating motion in a vertical plane with respect to the machine body 1 while loosely extending through the axial center bore formed in the pivotal member 6. At the same time, the rotation of the main shaft 2 is transmitted through the crown gear 15 to the eccentric cam 13 which presses against the inner wall of the cam opening 12, so that the oscillating member 10 moves in oscillating motion about the shaft 11, thereby causing the actua tion bar 8 to move in reciprocating motion in a horizontal plane in a predetermined stroke. The reciprocating movements of the actuation bar 8 cause the pivotal member 6 connected to the actuation bar to move in pivotal motion about the supporting shaft 5 in a horizontal plane. This permits the needle bar 4, which is moving in reciprocating motion in a vertical plane, to move simultaneously in pivotal motion such that it causes the needle to form zigzag stitches instead of straight stitches.
Simultaneously as the actuation bar 8 moves in reciprocating motion, the oscillating plate 26 moves in oscillating motion about the swinging shaft 25 so as to cause the swinging shaft 25 to rotate angularly to right and left repeatedly in synchronism with the reciprocating motion of the actuation bar 8. The crank member 29 at the lower end of the shaft 25 causes the looper shaft 30 to move in reciprocating motion to right and left in FIG. 1 in a horizontal plane. It will thus be evident that the elevational needle bar 4 and the looper shaft 30 are moved in synchronism with the reciprocating motion of the needle bar 4 such that the forward end of the looper 33 crosses the needle 34 on the needle bar 4 at the same position at all times, thereby permitting to form zigzag stitches in the most appropriate manner.
The operation of switching from zigzag stitch forming to straight stitch forming will now be explained. If the knob 23 is operated to shift the switching cam 24 from a position in which it is in engagement with the concave portion through the beveled surface portion 22 to a position in which it is maintained in engagement with the convexed surface portion 21, then the actuation bar 8 moves in pivotal motion about the supporting shaft 9 in a direction opposite to the direction of the arrow 19 against the biasing force of the spring 18, thereby bringing the pin 16 on the oscillating member 10 into engagement in the opening section 17' whose major dimension portion is disposed parallel to the longitudinal axis of the actuation bar 8. Accordingly, when the oscillating member 10 moves in oscillating motion, the pin 16 moves in idling motion, so that no motion is transmitted to the actuation bar 8 in spite of the oscillating movements of the oscillating member 10. This results in the needle bar 4 merely moving in a reciprocating motion in a vertical plane permitting the needle 34 to form straight stitches.
From the foregoing description, it will be appreciated that the present invention makes it possible to maintain the needle and looper at proper relative positions at all times since means is provided to bring the reciprocating movements of the actuation bar or the oscillating movements of the needle bar for permitting the needle bar to perform a zigzag stitch forming operation into synchronism with the reciprocating movements of the looper shaft. The synchronizing means of this invention is highly efficient and yet simple construction for use with toy zigzag sewing machines.
What is claimed is:
1. A sewing machine, especially suited as a toy sewing machine, capable of forming straight or zigzag stitching, comprising: a main rotary drive shaft drivingly engaged with a reciprocating needle bar, a rotary looper shaft for cooperating with said needle bar to sew stitches, said drive shaft being arranged to rotate said looper shaft and to reciprocate said needle bar synchronously with each other, and oscillatory means to oscillate said needle bar in a plane perpendicular to its direction of reciprocation and to correspondingly oscillate said looper shaft so as to sew zigzag stitches, said oscillatory means comprising a rotary cam driven by said main shaft, a first member adapted to be acted on by said cam to oscillate in a said plane and connected to said needle bar and also to said looper shaft so as to correspondingly oscillate said needle bar and looper shaft, a single actuation means for selectively effectively connecting of disconnecting said first member relative to said cam whereby actuation of said single actuation means by the operator renders operable or inoperable said oscillatory means simultaneously relative to said needle bar and said looper shaft, said oscillatory means including a T- shaped slot and a pin, said first member being connected to said cam by means of said pin engaging said T-shaped slot, said actuation means being adapted to shift said first member relative to said pin so that said pin is engaged in one or the other legs forming said T-shaped slot, one of said legs extending parallel to said plane of oscillatory movement whereby no movement is transmitted to said first member by said cam when said pin is engaged in said one leg, and the other leg extending perpendicular to said plane of oscillatory movement whereby movement is transmitted form said cam to said first member when said pin is engaged in said other leg.
2. A toy sewing machine capable of switching between zigzag stitch forming and straight stitch forming operations comprising a machine body, a rotary main shaft rotatably secured to said machine body, a needle bar mounting a sewing needle at its forward end and connected to said rotary main shaft for reciprocating motion in a vertical plane with respect to said machine body, a pivotal member connected to said machine body for pivotal motion in a horizontal plane and formed with an axial center bore for permitting said needle bar to loosely extend therethrough, an actuation bar connected at one end thereof to the free end of said pivotal member for oscillating motion of said pivotal member in a horizontal plane, oscillating mechanism for causing said actuation bar to move in reciprocating motion in a horizontal plane along its longitudinal axis in conjunction with the reciprocating motion of said needle bar in a vertical plane, a mechanism for switching between a zigzag stitch forming operation and a straight stitch forming operation by controlling the engagement of said actuation bar with said oscillating mechanism, a swinging mechanism connected to said actuation bar near the other end thereof for repeated angular rotation to right and left as said actuation bar moves in reciprocating motion in a horizontal plane, a looper shaft mounted below the machine body and connected to said swinging mechanism for reciprocating in a horizontal plane as said swinging mechanism repeatedly rotates angularly to right and left, and a looper mounted at the forward end of said needle bar, wherein said mechanism for switching between a zigzag stitch forming operation and a straight stitch forming operation by controlling the engagement of said actuation bar with said oscillating mechanism comprises an oscillating member and a spring, said spring urging said actuation bar to move in a horizontal direction transverse of its reciprocating motion; by its biasing force, a pin provided on said oscillating member a T-shaped opening formed in said actuation bar near said free end thereof and consisting of a first opening section with its major dimension portion extending along the longitudinal axis of the actuation bar and a second opening section with its major dimension portion extending at right angles to the longitudinal axis of the actuation bar, said two opening sections being adapted to receive said pin selectively, an engaging surface formed on one side of the free and portion of said actuation bar and consisting of a concaved surface portion, beveled surface portion and convexed surface portion, and switching cam adapted to move said actuation bar against said spring biasing force and relative to said pin by engaging one of said concaved and con-,
vexed surface portions thereby to selectively cause said pin to be received in said first or said second opening section.
k =l t
Claims (2)
1. A sewing machine, especially suited as a toy sewing machine, capable of forming straight or zigzag stitching, comprising: a main rotary drive shaft drivingly engaged with a reciprocating needle bar, a rotary looper shaft for cooperating with said needle bar to sew stitches, said drive shaft being arranged to rotate said looper shaft and to reciprocate said needle bar synchronously with each other, and oscillatory means to oscillate said needle bar in a plane perpendicular to its direction of reciprocation and to correspondingly oscillate said looper shaft so as to sew zigzag stitches, said oscillatory means comprising a rotary cam driven by said main shaft, a first member adapted to be acted on by said cam to oscillate in a said plane and connected to said needle bar and also to said looper shaft so as to correspondingly oscillate said needle bar and looper shaft, a single actuation means for selectively effectively connecting of disconnecting said first member relative to said cam whereby actuation of said single actuation means by the operator renders operable or inoperable said oscillatory means simultaneously relative to said needle bar and said looper shaft, said oscillatory means including a T-shaped slot and a pin, said first member being connected to said cam by means of said pin engaging said T-shaped slot, said actuation means being adapted to shift said first member relative to said pin so that said pin is engaged in one or the other legs forming said T-shaped slot, one of said legs extending parallel to said plane of oscillatory movement whereby no movement is transmitted to said first member by said cam when said pin is engaged in said one leg, and the other leg extending perpendicular to said plane of oscillatory movement whereby movement is transmitted form said cam to said first member when said pin is engaged in said other leg.
2. A toy sewing machine capable of switching between zigzag stitch forming and straight stitch forming operations comprising a machine body, a rotary main shaft rotatably secured to said machine body, a needle bar mounting a sewing needle at its forward end and connected to said rotary main shaft for reciprocating motion in a vertical plane with respect to said machine body, a pivotal member connected to said machine body for pivotal motion in a horizontal plane and formed with an axial center bore for permitting said needle bar to loosely extend therethrough, an actuation bar connected at one end thereof to the free end of said pivotal member for oscillating motion of said pivotal member in a horizontal plane, oscillating mechanism for causing said actuation bar to move in reciprocating motion in a horizontal plane along its longitudinal axis in conjunction with the reciprocating motion of said needle bar in a vertical plane, a mechanism for switching between a zigzag stitch forming operation and a straight stitch forming operation by controlling the engagement of said actuation bar with said oscillating mechanism, a swinging mechanism connected to said actuation bar near the other end thereof for repeated angular rotation to right and left as said actuation bar moves in reciprocating motion in a horizontal plane, a looper shaft mounted below the machine body and connected to said swinging mechanism for reciprocating in a horizontal plane as said swinging mechanism repeatedly rotates angularly to right and left, and a looper mounted at the forward end of said needle bar, wherein said mechanism for switching between a zigzag stitch forming operation and a straight stitch forming operation by controlling the engagement of said actuation bar with said oscillating mechanism comprises an oscillating member and a spring, said spring urging said actuation bar to move in a horizontal direction transverse of its reciprocating motion; by its biasing force, a pin provided on said oscillating member a T-shaped opening formed in said actuation bar near said free end thereof and consisting of a first opening section with its major diMension portion extending along the longitudinal axis of the actuation bar and a second opening section with its major dimension portion extending at right angles to the longitudinal axis of the actuation bar, said two opening sections being adapted to receive said pin selectively, an engaging surface formed on one side of the free and portion of said actuation bar and consisting of a concaved surface portion, beveled surface portion and convexed surface portion, and switching cam adapted to move said actuation bar against said spring biasing force and relative to said pin by engaging one of said concaved and convexed surface portions thereby to selectively cause said pin to be received in said first or said second opening section.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6001169 | 1969-06-26 | ||
| JP6001069 | 1969-06-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US3633527A true US3633527A (en) | 1972-01-11 |
Family
ID=26401078
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US47671A Expired - Lifetime US3633527A (en) | 1969-06-26 | 1970-06-19 | Toy sewing machine capable of switching between zigzag stitch forming and straight stitch forming operations |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US3633527A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2540144A1 (en) * | 1983-01-28 | 1984-08-03 | Singer Co | CONTROLLING POSITIONING AND NEEDLE "MOWING" MOVEMENT FOR SEWING MACHINES |
| CZ302244B6 (en) * | 1999-05-06 | 2011-01-05 | Juki Corporation | Device for turning sewing part of a sewing machine |
| US20160348290A1 (en) * | 2015-05-25 | 2016-12-01 | Janome Sewing Machine Co., Ltd. | Sewing machine including needle bar turning apparatus |
| CH719451A1 (en) * | 2022-02-25 | 2023-08-31 | Ssm Schaerer Schweiter Mettler Ag | Swivel drive for a winding device. |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US986354A (en) * | 1909-08-24 | 1911-03-07 | Robert Brown | Sewing-machine for fancy stitch and embroidery work. |
| US2028016A (en) * | 1933-09-20 | 1936-01-14 | Schweiger Curt Wilhelm | Sewing machine |
| US2045340A (en) * | 1933-11-23 | 1936-06-23 | Anker Werke Ag | Zigzag stitching machine |
| US2690723A (en) * | 1950-04-04 | 1954-10-05 | Sudo Hidenori | Zigzag sewing mechanism of doublethread sewing machine |
-
1970
- 1970-06-19 US US47671A patent/US3633527A/en not_active Expired - Lifetime
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US986354A (en) * | 1909-08-24 | 1911-03-07 | Robert Brown | Sewing-machine for fancy stitch and embroidery work. |
| US2028016A (en) * | 1933-09-20 | 1936-01-14 | Schweiger Curt Wilhelm | Sewing machine |
| US2045340A (en) * | 1933-11-23 | 1936-06-23 | Anker Werke Ag | Zigzag stitching machine |
| US2690723A (en) * | 1950-04-04 | 1954-10-05 | Sudo Hidenori | Zigzag sewing mechanism of doublethread sewing machine |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2540144A1 (en) * | 1983-01-28 | 1984-08-03 | Singer Co | CONTROLLING POSITIONING AND NEEDLE "MOWING" MOVEMENT FOR SEWING MACHINES |
| CZ302244B6 (en) * | 1999-05-06 | 2011-01-05 | Juki Corporation | Device for turning sewing part of a sewing machine |
| US20160348290A1 (en) * | 2015-05-25 | 2016-12-01 | Janome Sewing Machine Co., Ltd. | Sewing machine including needle bar turning apparatus |
| CN106192240A (en) * | 2015-05-25 | 2016-12-07 | 蛇目缝纫机工业株式会社 | Possesses the sewing machine of shank rotary apparatus |
| US9822472B2 (en) * | 2015-05-25 | 2017-11-21 | Janome Sewing Machine Co., Ltd. | Sewing machine including needle bar turning apparatus |
| CN106192240B (en) * | 2015-05-25 | 2018-08-31 | 蛇目缝纫机工业株式会社 | Has the sewing machine of shank rotating device |
| CH719451A1 (en) * | 2022-02-25 | 2023-08-31 | Ssm Schaerer Schweiter Mettler Ag | Swivel drive for a winding device. |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109487454B (en) | Presser foot device is lifted to sewing machine's trimming | |
| US2684649A (en) | Device for embroidering automatically with zigzag sewing machines | |
| GB911337A (en) | Improvements in or relating to sewing machines | |
| US3633527A (en) | Toy sewing machine capable of switching between zigzag stitch forming and straight stitch forming operations | |
| US4616585A (en) | Device providing for three sewing machine needle strokes | |
| US2864327A (en) | Sewing machine | |
| JP4435379B2 (en) | Cloth cutting device for hole sewing machine | |
| US4736699A (en) | Method of sewing corners of a double seam, with a two-needle sewing machine | |
| US2594534A (en) | Miniature lock stitch sewing machine | |
| US4848254A (en) | Sewing machine with multidirectional upper and lower feed devices | |
| US3835716A (en) | Crank-driven reciprocating mechanisms | |
| US3216381A (en) | Buttonhole sewing machine | |
| US3217677A (en) | Ornamental stitch sewing machine | |
| US3844234A (en) | Work clamp feeding mechanism for sewing machines | |
| US3522781A (en) | Sewing machine | |
| US3082720A (en) | Device for sewing designs on zigzag sewing machines | |
| US3139051A (en) | Sewing machine universal feed arrangement | |
| US3610187A (en) | Overedge sewing machine apparatus | |
| GB1078796A (en) | Sewing machines | |
| US3428006A (en) | Buttonhole sewing machine which automatically forms barring and covering stitches | |
| JPH027677B2 (en) | ||
| US2253731A (en) | Sewing machine and attachment therefor | |
| US3089444A (en) | Zig-zag sewing machines | |
| US3242890A (en) | Sewing machine for sewing decorative stitches | |
| JPH03500730A (en) | sewing machine |