Patent US3875468A successfully refreshed from Google Patents.
US3875468A
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System for working cylinders along a line of intersection
Assignee: Yaskawa Electric Corp
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Filing: 1973-09-13
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Granted: 1975-04-01
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Expires: 1993-09-13
Abstract
Abstract In a system for working two cylinders (A and B) along a line of intersection thereof, a position (x) to which a working tool is driven in an axial direction of the cylinder (A) to be worked is attained, as functions of an angle of rotation ( omega t) of the cylinder (A) in a direction perpendicular to the axis thereof and an angle of rotation ( Alpha ) obtained by shifting the angle of rotation ( omega t) to the cylinder (B), from a diameter (d) of the cylinder (A), a diameter (D) of the cylinder (B) and a connecting angle ( theta ) formed by the axis of the cylinders (A and B) by a static electrical digital operation performing a servo-operation, or a feed-back comparison operation, of an equation d.sin omega t D.sin Alpha with the aid of digital differential analyzers.
Inventors
- 👤 Takashi Yagi
- 👤 Sadaaki Nanai
- 👤 Souji Ouhara
- 👤 Yukihiro Shirakawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 19:46
CPC Classifications
G; G05; G05B; G05B19/00; G05B19/02; G05B19/18; G05B19/182; B; B23; B23K; B23K7/00; B23K7/005; B23K7/006; B23K7/007; G06; G06F; G06F7/00; G06F7/60; G06F7/64; G06F7/66
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
313 words
In a system for working along a line of intersection between first and second cylinders whose axes intersect, the combination of means adjustable to produce electrical signals (d), (D), and ( theta ) which represent, respectively, the diameters of the first and second cylinders and the angle of intersection of their axes, means responsive to the rotation of the first cylinder about its axis to produce a corresponding electrical signal ( omega t), an electrical oscillator operative to generate a series of accurately spaced electrical impulses, first integrator means connected to receive said electrical impulses and said electrical signal ( omega t) and to produce delta modulation pulses representative of the values ( Delta sin omega t) and ( Delta cos omega t), second integrator means connected to receive the electrical signal (d) and the delta modulation pulses ( Delta sin omega t) and to produce delta modulation pulses (d. Delta sin omega t) in response thereto, third integrator means connected to receive the electrical signal (D) and feedback signals, and to produce delta modulation pulses (D. Delta sin Alpha ), first comparator means connected to receive the delta modulation pulses (d. Delta sin omega t) on the one hand and the delta modulation pulses (D. Delta sin Alpha ) on the other hand, the output of said first comparator being connected to supply said feedback signals to sAid third integrator means for operating same in a servo mode to produce a delta modulation signal (D. Delta sin Alpha ) where ( Alpha ) is the angle of rotation obtained when the angle of rotation ( omega t) of the first cylinder is shifted onto the second cylinder, second comparator means connected to receive the delta modulated signals and to produce working tool driving signals in response thereto and means for driving a working tool in response to said working tool driving signals.
Claim 2
Dependent Claim
313 words
In a system for working along a line of intersection between first and second cylinders whose axes intersect, the combination of means adjustable to produce electrical signals (d), (D), and ( theta ) which represent, respectively, the diameters of the first and second cylinders and the angle of intersection of their axes, means responsive to the rotation of the first cylinder about its axis to produce a corresponding electrical signal ( omega t), an electrical oscillator operative to generate a series of accurately spaced electrical impulses, first integrator means connected to receive said electrical impulses and said electrical signal ( omega t) and to produce delta modulation pulses representative of the values ( Delta sin omega t) and ( Delta cos omega t), second integrator means connected to receive the electrical signal (d) and the delta modulation pulses ( Delta sin omega t) and to produce delta modulation pulses (d. Delta sin omega t) in response thereto, third integrator means connected to receive the electrical signal (D) and feedback signals, and to produce delta modulation pulses (D. Delta sin Alpha ), first comparator means connected to receive the delta modulation pulses (d. Delta sin omega t) on the one hand and the delta modulation pulses (D. Delta sin Alpha ) on the other hand, the output of said first comparator being connected to supply said feedback signals to sAid third integrator means for operating same in a servo mode to produce a delta modulation signal (D. Delta sin Alpha ) where ( Alpha ) is the angle of rotation obtained when the angle of rotation ( omega t) of the first cylinder is shifted onto the second cylinder, second comparator means connected to receive the delta modulated signals and to produce working tool driving signals in response thereto and means for driving a working tool in response to said working tool driving signals.
Claim 3
Dependent Claim
256 words
A system according to claim 1 wherein said second comparator means comprises fourth integrator means comprising a third comparator connected to receive the electrical signals ( theta ) and a comparator feedback signal, said third comparator being operative to produce delta modulated pulses ( Delta theta ), a half integrator and first and second integrators, said half integrator being connected to receive said delta modulated pulses ( Delta theta ) and to produce said comparator feedback signals, a feedback loop connecting the output of said half integrator to an input of said third comparator, means connecting the output of said third comparator to said first and second integrators, said second integrator being operative to produce signals corresponding to the value (sin theta ) in response to the application thereto of delta modulated pulses corresponding to ( Delta sin theta ) and ( Delta theta ) and operative further to produce a feedback output comprising delta modulated pulses corresponding to the value (- Delta cos theta ), a feedback loop connecting the feedback output of the second integrator to the first integrator, said first integrator being operative to produce signals corresponding to the value (cos theta ) in response to the application thereto of said feedback output and said delta modulated pulses corresponding to ( Delta theta ), said first integrator being operative to produce further output signals comprising delta modulated pulses corresponding to the value ( Delta sin theta ) and means for applying said further output signals from said first integrator to said second integrator.
Claim 4
Dependent Claim
220 words
A system according to claim 1 wherein said second comparator means comprises fourth integrator means connected to receive the electrical signals ( theta ) and to produce signals representative of the values (sin theta ) and (cos theta ), fifth integrator means connected to said third integrator means to receive therefrom delta modulation pulses (D. Delta sin Alpha ) and to produce signals representative of the value (D. Delta cos Alpha ), sixth integrator means connected to said second integrator means to receive therefrom delta modulation pulses (d. Delta sin omega t) and to produce signals representative of the value (d. Delta cos omega t), a comparator connected to receive the outputs of said fifth and sixth integrator means and a further feedback signal and to produce a comparator output signal corresponding to the comparison of said outputs of said fifth and sixth integrator means and said further feedback signal, seventh integrator means connected to receive said comparator output signal and the signal (sin theta ) from said fourth integrator means and to produce said further feedback signal, eighth integrator means also connected to receive said comparator output signal and to produce a delta modulated driving command signal, a register connected to receive said delta modulated command signal and working tool driving means connected to receive outputs from said register.
Claim 5
Dependent Claim
107 words
A system according to claim 3 wherein said sixth integrator means is also connected to the output of said fourth integrator means to receive signals representative of the value (cos theta ) and is operable to produce output signals representative of the value (d. Delta cos omega t cos theta ) wherein said fifth integrator means is also connected to receive a signal representative of the value (1 ), wherein there is provided a ninth integrator means connected to receive said electrical signal ( omega t), said ninth integrator means being operative to produce a delta modulated driving command signal corresponding to rotation of the first cylinder.
Claim 6
Dependent Claim
110 words
A system according to claim 3 wherein said sixth integrator means is also connected to receive a signal representative of the value (1), wherein said fifth integrator means is also connected to the output of said fourth integrator means to receive signals representative of the value (cos theta ) and is operable to produce signals representative of the value (D. Delta cos Alpha . cos theta ) and wherein there is provided a ninth integrator means connected to receive delta modulated outputs corresponding to the value ( Delta Alpha ) from said first comparator and to produce a delta modulated driving command signal corresponding to rotation of the second cylinder.
Claim 7
Dependent Claim
121 words
A system according to claim 3 wherein said sixth integrator means is also connected to the output of said fourth integrator means to receive signals representative of the value (cos theta ) and is operable to produce output signals representative of the value (d. Delta cos omega t cos theta ), wherein said fifth integrator means is also connected to receive a signal representative of the value (0) and to produce an output of value zero in response thereto, and wherein there is provided a ninth integrator means connected to receive the delta modulated electrical signals ( Delta omega t), said ninth integrator means being operative to produce a delta modulated driving command signal corresponding to rotation of the first cylinder.
Claim 8
Dependent Claim
112 words
A system according to claim 3 wherein there is provided an adjustable frequency oscillator operable to produce electrical pulses at different repetition rates, a control comparator connected to receive the pulses from said adjustable frequency oscillator and to receive working tool driving signals, said control comparator being operative to produce a stop producing signal when the repetition rate of working tool driving signals applied thereto is greater than that of the electrical pulses produced by said electrical frequency oscillator, and means for directing said stop signals from said control comparator to first and second comparator means to stop their operation until the occurance of a subsequent pulse from said adjustable frequency oscillator.
Claim 9
Dependent Claim
19 words
A system according to claim 7 wherein said control comparator is connected to receive first outputs from said register.
Claim 10
Dependent Claim
35 words
A system according to claim 8 wherein said control comparator is connected to receive additional outputs from a further register connected to process signals corresponding to the rotation of the first cylinder about its axis.
Claim 11
Dependent Claim
23 words
A system according to claim 9 wherein said first and additional outputs are applied to said control comparator via a logical sum circuit.
References Cited (Backward Citations)
US3441817A
Cited
US3786331A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-31 | 1978-09-30 | 1979-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-31 | 1982-09-30 | 1983-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-31 | 1986-09-30 | 1987-04-01 | $7700.00 | Window Closed / Lapsed |