US3670975A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Constant tension controller device for winder
Assignee: Panasonic Holdings Corp
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Filing: 1969-11-13
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Granted: 1972-06-20
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Expires: 1989-11-13
Abstract
Abstract A constant tension controller device for a winder which comprises a differential transformer for generating an output voltage in response to a vertically movable roller moved up and down according to the tension of a yarn, and a tacho-generator connected with a three-phase induction motor for driving a spool for rotation, whereby electric current in one of three power lines of the three-phase induction motor is controlled by a thyrister as a function of the difference between the output voltage of the tacho-generator and the output voltage of the differential transformer so that the yarn of nylon or like material are wound on the spool with a constant tension.
Inventors
- 👤 Yoshio Tomimatsu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:38
CPC Classifications
B; B65; B65H; B65H59/00; B65H59/38; B65H59/384; B65H59/385; B65H2701/00; B65H2701/30; B65H2701/31
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
328 words
A constant tension controller device for a winder comprising main control means (17) connected in series with one phase of a three-phase power source for controlling the flow of current therethrough, a three-phase induction motor (15) connected to said three-phase power source through said main control means (17) for driving a spool (6), a vertically movable roller (9) mounted on an arm (11) supported pivotally at supporting point (10), around which roller (9) yarn (7) is led from a supply reel through a fixed roll (8) to the spool (6), a differential transformer (12) having an iron core (42) mechanically connected with said vertically movable roller (9) and having secondary windings (37, 38), a rectifier (13), including diodes (43,44) and output resistors (47, 48) connected in series with said secondary windings (37,38) to produce across said series resistors (47, 48) a differential voltage in a predetermined direction depending upon the magnitude of the voltage produced in said secondary windings (37) and (38), the position of said iron core (42) being varied together with said roller (9) in accordance with the variation in the tension of said yarn (7) thereby producing a rectified d.c. output voltage at said output resistors (47, 48), a tacho-generator (18) coupled to said three-phase induction motor (15) and connected to an associated rectifier circuit (19) having an output resistor (50) to produce a d.c. output voltage corresponding to the rotational speed of said threephase induction motor, and, circuit means associated with said output resistors (47, 48) of said rectifier (13) and said output resistor (50) of said rectifier circuit and connected to said main control means (17) for producing the sum of said d.c. output voltage of said differential transformer (12) appearing at the output of said rectifier (13) and said d.c. output voltage of said tachogenerator (18) appearing at the output of said rectifier circuit, whereby the flow of current through said main control means (17) is controlled by the combined d.c. voltage.
Claim 2
Dependent Claim
328 words
A constant tension controller device for a winder comprising main control means (17) connected in series with one phase of a three-phase power source for controlling the flow of current therethrough, a three-phase induction motor (15) connected to said three-phase power source through said main control means (17) for driving a spool (6), a vertically movable roller (9) mounted on an arm (11) supported pivotally at supporting point (10), around which roller (9) yarn (7) is led from a supply reel through a fixed roll (8) to the spool (6), a differential transformer (12) having an iron core (42) mechanically connected with said vertically movable roller (9) and having secondary windings (37, 38), a rectifier (13), including diodes (43,44) and output resistors (47, 48) connected in series with said secondary windings (37,38) to produce across said series resistors (47, 48) a differential voltage in a predetermined direction depending upon the magnitude of the voltage produced in said secondary windings (37) and (38), the position of said iron core (42) being varied together with said roller (9) in accordance with the variation in the tension of said yarn (7) thereby producing a rectified d.c. output voltage at said output resistors (47, 48), a tacho-generator (18) coupled to said three-phase induction motor (15) and connected to an associated rectifier circuit (19) having an output resistor (50) to produce a d.c. output voltage corresponding to the rotational speed of said threephase induction motor, and, circuit means associated with said output resistors (47, 48) of said rectifier (13) and said output resistor (50) of said rectifier circuit and connected to said main control means (17) for producing the sum of said d.c. output voltage of said differential transformer (12) appearing at the output of said rectifier (13) and said d.c. output voltage of said tachogenerator (18) appearing at the output of said rectifier circuit, whereby the flow of current through said main control means (17) is controlled by the combined d.c. voltage.
Claim 3
Dependent Claim
130 words
A constant tension controller device for a winder according to claim 1, wherein said circuit means comprises a phase controlling transistor (56) connected to receive the d.c. outputs of said differential transformer (12) and said tacho-generator (18) a unijunction transistor (55) connected to receive the output of said phase controlling transistor (56), and a pulse transformer (59) connected to receive the output of said unijunction transistor (55) and having its secondary winding connected to the control terminal of said main control means (17), whereby when the flow of current to said phase controlling transistor (56) is controlled, the switching on of said unijunction transistor (55) is controlled so that the flow of current to said main control means (17) is controlled by the secondary output of said pulse transformer (59).
Claim 4
Dependent Claim
24 words
A constant tension controller device for a winder according to claim 2, wherein said main control means (17) is composed of a thyristor (51).
Claim 5
Dependent Claim
66 words
A constant tension controller device for a winder according to claim 2, wherein said main control means (17) is composed of a full-wave rectifier having its a.c. terminals connected in series with one phase of said three-phase power source and its d.c. terminals connected to a thyristor, whereby the flow of current through said full-wave rectifier is controlled by controlling the firing angle of said thyristor.
References Cited (Backward Citations)
US2275192A
Cited
US2353639A
Cited
US2509250A
Cited
US2571023A
Cited
US2571454A
Cited
US2752105A
Cited
US2844773A
Cited
US3210625A
Cited
US3180584A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-20 | 1975-12-20 | 1976-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-20 | 1979-12-20 | 1980-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-20 | 1983-12-20 | 1984-06-20 | $7700.00 | Window Closed / Lapsed |