US3782136A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pulse generator for an electrical control system of a machine
Assignee: H Stoll GmbH and Co KG
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Filing: 1972-07-31
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Granted: 1974-01-01
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Expires: 1992-07-31
Abstract
Abstract A pulse generator for an electrical control system of a machine having relatively movable parts such as for a programmed control system of a knitting machine. One machine part has a permanent magnet forming an air gap with at least one field plate in the air gap arranged such that the current therethrough depends on the nature of the magnetic field in the air gap. The other machine part has on it items to affect the nature of the magnetic field at the air gap upon relative movement of the machine parts, these items including a magnetically conductable body movable through the air gap and/or a magnetically conducting shunt body movable in the vicinity of the air gap. The magnetically conductable body may take the form of teeth on a soft iron comb, a soft iron plate with apertures, or separate soft iron pieces mounted separately for relative movement through the air gap.
Inventors
- 👤 J Ploppa
- 👤 W Hadam
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:32
CPC Classifications
H; H03; H03K; H03K17/00; H03K17/51; H03K17/90
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
189 words
A knitting machine having a carriage machine part movable relative to a needle bed machine part, a pulse generator having cooperating parts on said carriage and said needle bed machine parts, respectively, said generator comprising: a permanent magnet on the first machine part, said permanent magnet having an air gap disposed in the magnetic reaction circuit of the permanent magnet, at least one magnetic field plate arranged in said air gap such that the electrical resistance characteristics of the field plate depend on the magnetic flux within the air gap, means for passing an electrical current through the field plate, changes in the electrical resistance of said field plate changing the current therethrough so as to define the pulse, and at least one magnetically conducting body arranged on the other machine part such that upon relative movement of the machine parts, the permanent magnet and the magnetically conducting body are relatively movable such that at least one control area on the magnetically conducting body passes temporarily into the air gap to change the magnetic flux within the Air gap and hence change the electrical resistance through the field plate.
Claim 2
Dependent Claim
189 words
A knitting machine having a carriage machine part movable relative to a needle bed machine part, a pulse generator having cooperating parts on said carriage and said needle bed machine parts, respectively, said generator comprising: a permanent magnet on the first machine part, said permanent magnet having an air gap disposed in the magnetic reaction circuit of the permanent magnet, at least one magnetic field plate arranged in said air gap such that the electrical resistance characteristics of the field plate depend on the magnetic flux within the air gap, means for passing an electrical current through the field plate, changes in the electrical resistance of said field plate changing the current therethrough so as to define the pulse, and at least one magnetically conducting body arranged on the other machine part such that upon relative movement of the machine parts, the permanent magnet and the magnetically conducting body are relatively movable such that at least one control area on the magnetically conducting body passes temporarily into the air gap to change the magnetic flux within the Air gap and hence change the electrical resistance through the field plate.
Claim 3
Dependent Claim
44 words
A knitting machine according to claim 1, wherein the magnetically conducting body is in the form of a comb of soft iron having teeth, said teeth arranged to pass through the air gap during the said relative movement of the parts of the machine.
Claim 4
Dependent Claim
37 words
A knitting machine according to claim 1, wherein the magnetically conducting body is an apertured bar of soft iron having openings and intervening imperforate portions arranged to pass through the air gap during the said relative movement.
Claim 5
Dependent Claim
35 words
A knitting machine according to claim 1, which includes two magnetic field plates which are respectively arranged in two separate air gaps arranged parallel to one another in the reaction part of said permanent magnet.
Claim 6
Dependent Claim
81 words
A knitting machine according to claim 1, which includes two magnetic field plates which are arranged respectively in two separate air gaps arranged parallel to one another in the reaction part of said permanent magnet, and wherein the magnetically conducting body is an apertured bar of soft iron having two rows of openings and intervening imperforate portions, each of said rows corresponding to one of said air gaps and arranged to pass through its respective air gap during said relative movement.
Claim 7
Dependent Claim
44 words
A knitting machine according to claim 1, including a magnetically conducting shunt body attached to the said other machine parts so as to temporarily define an air gap in a shunt circuit of the permanent magnet upon said relative movement of the machine parts.
Claim 8
Dependent Claim
38 words
A knitting machine according to claim 1, including a magnetically conducting shunt body attached to the said other machine part so as to temporarily and completely bridge the said air gap upon relative movement of the machine parts.
Claim 9
Dependent Claim
44 words
A knitting machine according to claim 1, said permanent magnet and its respective field plate being mounted on a carrier which rotates about an axis, said magnetically conducting bodies being fixed about the path of movement of the air gap of the permanent magnet.
Claim 10
Dependent Claim
170 words
A pulse generator for an electrical control system of a machine of the type having first and second parts movable relative to each other, comprising: a permanent magnet on the first machine part, said permanent magnet having an air gap disposed in the magnetic reaction circuit of the permanent magnet, at least one magnetic field plate arranged in said air gap such that the electrical resistance characteristics of the field plate would depend on the magnetic flux within the air gap, and at least one magnetically conducting body arranged on the other machine part such that upon relative movement of the machine parts, the permanent magnet and the magnetically conducting body are relatively movable such that at least one control area on the magnetically conducting body passes temporarily into the air gap, and including a magnetically conducting shunt body attached to the said other machine parts so as to temporarily define an air gap in a shunt circuit of the permanent magnet upon said relative movement of the machine parts.
Claim 11
Dependent Claim
170 words
A pulse generator for an electrical control system of a machine of the type having first and second parts movable relative to each other, comprising: a permanent magnet on the first machine part, said permanent magnet having an air gap disposed in the magnetic reaction circuit of the permanent magnet, at least one magnetic field plate arranged in said air gap such that the electrical resistance characteristics of the field plate would depend on the magnetic flux within the air gap, and at least one magnetically conducting body arranged on the other machine part such that upon relative movement of the machine parts, the permanent magnet and the magnetically conducting body are relatively movable such that at least one control area on the magnetically conducting body passes temporarily into the air gap, and including a magnetically conducting shunt body attached to the said other machine parts so as to temporarily define an air gap in a shunt circuit of the permanent magnet upon said relative movement of the machine parts.
Claim 12
Dependent Claim
163 words
A pulse generator for an electrical control system of a machine of the type having first and second parts movable relative to each other, comprising: a permanent magnet on the first machine part, said permanent magnet having an air gap disposed in the magnetic reaction circuit of the permanent magnet, at least one magnetic field plate arranged in said air gap such that the electrical resistance characteristics of the field plate would depend on the magnetic flux within the air gap, and at least one magnetically-conducting body arranged on the other machine part such that upon relative movement of the machine parts, the permanent magnet and the magnetically conducting body are relatively movable such that at least one control area on the magnetically conducting body passes temporarily into the air gap, and including a magnetically conducting shunt body attached to the saiD other machine part so as to temporarily and completely bridge the said air gap upon relative movement of the machine parts.
Claim 13
Dependent Claim
163 words
A pulse generator for an electrical control system of a machine of the type having first and second parts movable relative to each other, comprising: a permanent magnet on the first machine part, said permanent magnet having an air gap disposed in the magnetic reaction circuit of the permanent magnet, at least one magnetic field plate arranged in said air gap such that the electrical resistance characteristics of the field plate would depend on the magnetic flux within the air gap, and at least one magnetically-conducting body arranged on the other machine part such that upon relative movement of the machine parts, the permanent magnet and the magnetically conducting body are relatively movable such that at least one control area on the magnetically conducting body passes temporarily into the air gap, and including a magnetically conducting shunt body attached to the saiD other machine part so as to temporarily and completely bridge the said air gap upon relative movement of the machine parts.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-31 | 1977-07-02 | 1978-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-31 | 1981-07-02 | 1982-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-31 | 1985-07-02 | 1986-01-01 | $7700.00 | Window Closed / Lapsed |