Patent US3822658A successfully refreshed from Google Patents.
US3822658A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Punch-tape-controlled sewing apparatus
Assignee: Stahl Urban Co
•
Filing: 1973-04-27
•
Granted: 1974-07-09
•
Expires: 1993-04-27
Abstract
Abstract Apparatus for automatically controlling movement of material for sewing by a sewing machine in response to a pattern determined by a punch tape. A positioning device whose movement is controlled along respective axes by a pair of stepping motors effects relative movement of the material to be sewed with respect to the sewing machine. Each of the stepping motors is of the type having a plurality of windings producing stepwise movement of the motor shaft when energized with alternate changes in polarity. A punchtape reader detects uncoded perforations progressively arranged in a predetermined sequence in channels of a punch tape with two channels controlling each axis of movement. Solid state control circuitry for each stepping motor is interconnected with the tape reader. The circuit includes a first flip-flop responsive to detection of certain perforations in the two tape channels to alternately be switched between two stable states, a pair of flip-flops adapted for energizing the windings of one of the stepping motors, and a steering means including a plurality of AND gates interconnecting the first flip-flop to the pair of flip-flops. The arrangement provides automatic sewing of the material at high speed according to the predetermined pattern.
Inventors
- 👤 W Conner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:20
CPC Classifications
D; D05; D05B; D05B39/00; D05D; D05D2207/00; D05D2207/02; D05D2207/05; D05D2207/06; G; G05; G05B; G05B2219/00; G05B2219/30; G05B2219/36; G05B2219/36383
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
462 words
Punch-tape controlled sewing apparatus comprising: a sewing machine; positioning means for effective relative movement of material with respect to said sewing machine along at least two possible axes of movement for sewing of said material by said sewing machine; first and second stepping motors each having a plurality of windings and a shaft interconnected with said positioning means and adapted to rotate with stepwise movements when the windings are energized with successive sequential changes in polarity, each shaft controlling movement of said positioning means along a corresponding one of said axes of movement; a punch-tape reader for detecting uncoded perforations progressively arranged in a predetermined sequence in a plurality of channels of a punch tape, said perforations defining a predetermined pattern of movement by said positioning means, there being a pair of said channels corresponding to each of said axes of movement; and control means for each of said stepping motors interconnected with said tape reader, each said control means comprising a first flip-flop responsive to detection of certain of said perforations in said pair of tape channels to alternately be switched between two stable states and a pair of flip-flops adapted for energizing the windings of a respective one of said stepping motors, each of said pair of flip-flops having two stable states for maintaining a respective winding of each respective motor energized, said pair of flip-flops being connected with the first flip-flop through a steering means, each of said pair of flip-flops having a pair of output terminals each delivering a signal which is a function of the state of the respective flip-flop, said pair of flip-flops being adapted to alternately change the polarity with which the windings of the respective motor are energized by a switching of energization at a respective pair of output terminals thereof, said steering means comprising a plurality of AND gates interconnected between said first flip-flop and said pair of flip-flops and adapted to sense the state of energization of the respective output terminals of said pair of flip-flops and further adapted to prevent a second switching of energization at said output terminals of one of said pair of flip-flops due to the response of said first flip-flop to certain perforations in said respective pair of tape channels without an intervening switching of energization at the output terminals of the other one of said paIr of flip-flops, said pair of flip-flops alternately changing the polarity of said windings in response to switching of the first flip-flop whereby successive stepwise positioning movements of each motor shaft are controlled by said punch tape reader and the shafts of each motor are held stationary except during stepping and whereby said material is automatically and accurately sewed at high speed by the sewing machine according to said predetermined pattern.
Claim 2
Dependent Claim
462 words
Punch-tape controlled sewing apparatus comprising: a sewing machine; positioning means for effective relative movement of material with respect to said sewing machine along at least two possible axes of movement for sewing of said material by said sewing machine; first and second stepping motors each having a plurality of windings and a shaft interconnected with said positioning means and adapted to rotate with stepwise movements when the windings are energized with successive sequential changes in polarity, each shaft controlling movement of said positioning means along a corresponding one of said axes of movement; a punch-tape reader for detecting uncoded perforations progressively arranged in a predetermined sequence in a plurality of channels of a punch tape, said perforations defining a predetermined pattern of movement by said positioning means, there being a pair of said channels corresponding to each of said axes of movement; and control means for each of said stepping motors interconnected with said tape reader, each said control means comprising a first flip-flop responsive to detection of certain of said perforations in said pair of tape channels to alternately be switched between two stable states and a pair of flip-flops adapted for energizing the windings of a respective one of said stepping motors, each of said pair of flip-flops having two stable states for maintaining a respective winding of each respective motor energized, said pair of flip-flops being connected with the first flip-flop through a steering means, each of said pair of flip-flops having a pair of output terminals each delivering a signal which is a function of the state of the respective flip-flop, said pair of flip-flops being adapted to alternately change the polarity with which the windings of the respective motor are energized by a switching of energization at a respective pair of output terminals thereof, said steering means comprising a plurality of AND gates interconnected between said first flip-flop and said pair of flip-flops and adapted to sense the state of energization of the respective output terminals of said pair of flip-flops and further adapted to prevent a second switching of energization at said output terminals of one of said pair of flip-flops due to the response of said first flip-flop to certain perforations in said respective pair of tape channels without an intervening switching of energization at the output terminals of the other one of said paIr of flip-flops, said pair of flip-flops alternately changing the polarity of said windings in response to switching of the first flip-flop whereby successive stepwise positioning movements of each motor shaft are controlled by said punch tape reader and the shafts of each motor are held stationary except during stepping and whereby said material is automatically and accurately sewed at high speed by the sewing machine according to said predetermined pattern.
Claim 3
Dependent Claim
231 words
Sewing apparatus as set forth in claim 1 wherein each of said stepping motors includes two windings each winding having two sections for opposite polarization of the respective winding; wherein each of said plurality of AND gates has a pair of inputs and a single output; wherein each of said pair of flip-flops has a pair of inputs; wherein the said first flip-flop has a pair of outputs each delivering a signal which is a function of the state of said first flip-flop; wherein one output of said first flip-flop is connected to one respective pair of inputs of one pair of said AND gates, said one pair of AND gates having their respective outputs connected to the inputs of one of said pair of flip-flops and having their other respective inputs connected to both the outputs of the other of said pair of flip-flops and respective winding sections of one of said windings; and wherein the other output of said first flip-flop is connected to one respective pair of inputs of the other pair of said AND gates, said other pair of AND gates having their respective outputs connected to the inputs of the other of said pair of flip-flops and having their other respective inputs connected to both the outputs of said one of said pair of flip-flops and respective winding sections of the other one of said windings.
Claim 4
Dependent Claim
110 words
Sewing apparatus as set forth in claim 2 further comprising reversing means for causing reversal of each of said stepping motors, each reversing means including an additional flip-flop responsive to detection of certain other perforations in said respective pair of tape channels to alternately be switched between two stable states and a multiplex switching circuit responsive to said additional flip-flop interconnected with one of said pair of flip-flops and a respective winding of a respective motor, said multiplex switching circuit adapted to energize one winding of said stepping motor twice in sequence without intervening energization of the other of said windings by the other one of said pair of flip-flops.
Claim 5
Dependent Claim
40 words
Sewing apparatus as set forth in claim 3 wherein said control means further includes a plurality of switching amplifiers interconnected between a respective one of said output terminals of said pair of flip-flops and a respective stepping motor winding section.
Claim 6
Dependent Claim
106 words
Sewing apparatus as set forth in claim 4 further comprising slew means for causing slewing operation of a least one of said stepping motors for producing slewing movement of the positioning means independently of operation of said tape reader, said slew means including an oscillator and a further flip-flop adapted for switching alternately between each of two stable states in response to operation of said oscillator, and an additional pair of flip-flops adapted for interconnection with the windings of a stepping motor, said further flip-flop being toggled in response to an output signal from said oscillator, said further flip-flop alternately toggling said additional pair of flip-flops.
Claim 7
Dependent Claim
41 words
Sewing apparatus as set forth in claim 5, said slew means further comprising a Schmitt trigger interconnected between said oscillator and said further flip-flop, and multiplex switching means for selectively interconnecting said additional pair of flip-flops with the stepping motor windings.
Claim 8
Dependent Claim
185 words
Sewing apparatus as set forth in claim 6 further comprising means interconnected with said sewing machine for causing a punch tape to pass through said punch tape reader at a speed which varies as a predetermined functIon of the speed of the sewing machine, and wherein said positioning means comprises a clamp for clamping said material for sewing by said sewing machine, first drive means interconnected with the shaft of the first stepping motor for effecting transverse movement of the clamp, and second drive means interconnected with the shaft of the second stepping motor for effecting longitudinal movement of the clamp, and wherein said clamp comprises a table for supporting the material to be sewn and clamp elements for clamping the material against said table, and wherein said first and second drive means each comprise a linear bearing surface, slider means, a belt interconnected with said slider means and driven by the respective shaft of said first and second stepping motors for effecting linear sliding movement of said slider means along said linear bearing surface in response to rotation of the respective stepping motor shaft.
References Cited (Backward Citations)
US2837046A
Cited
US3112433A
Cited
US3355644A
Cited
US3329109A
Cited
US3385245A
Cited
US3614580A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-07-08 | 1978-01-07 | 1978-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-08 | 1982-01-07 | 1982-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-08 | 1986-01-07 | 1986-07-09 | $7700.00 | Window Closed / Lapsed |