US3614543A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of actuating magnetic valves and circuit for carrying out said method
Assignee: Voith Getriebe KG
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Filing: 1969-11-03
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Granted: 1971-10-19
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Expires: 1989-11-03
Abstract
Abstract The specification discloses a control circuit for electromagnetic devices and a method of operating such devices in which a higher voltage is supplied for actuating the devices to pull the armatures thereof to attracted position, while a lower voltage is supplied to hold the armatures in attracted position. In the circuit the coils of the electromagnetic devices are connected across a line in series with a voltage-dropping resistor and a bypass around the voltage-dropping resistor is closed automatically when a switch pertaining to a coil to be energized is moved to coil-engaging position.
Inventors
- 👤 Heinrich Dick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:05
CPC Classifications
H; H03; H03K; H03K17/00; H03K17/08; H03K17/28; H03K17/51; H03K17/56; H03K17/60
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
180 words
In a direct current system for controlling the supply of energy to the coil of electromagnetic means having moveable armature means, a supply of direct current voltage, a voltagedropping resistor in series with said coil means across said supply, a normally open line bypassing said voltage-dropping resistor, a voltage sensitive control element in said line responsive to a supply of voltage thereto to bring about closing of said line, switch means between said voltage dropping resistor and said coil means adapted to be actuated between opened and closed positions, circuit means including delay elements in the form of a first resistor and a first capacitor in series therewith operatively connecting said switch means to said control element and operable in response to actuation of said switch means to supply voltage to said control element for a predetermined period of time commencing with the actuation of said switch means, said period of time being determined by the value of said delay elements, said control element having a connection to the said first resistor near the end thereof opposite said first capacitor.
Claim 2
Dependent Claim
180 words
In a direct current system for controlling the supply of energy to the coil of electromagnetic means having moveable armature means, a supply of direct current voltage, a voltagedropping resistor in series with said coil means across said supply, a normally open line bypassing said voltage-dropping resistor, a voltage sensitive control element in said line responsive to a supply of voltage thereto to bring about closing of said line, switch means between said voltage dropping resistor and said coil means adapted to be actuated between opened and closed positions, circuit means including delay elements in the form of a first resistor and a first capacitor in series therewith operatively connecting said switch means to said control element and operable in response to actuation of said switch means to supply voltage to said control element for a predetermined period of time commencing with the actuation of said switch means, said period of time being determined by the value of said delay elements, said control element having a connection to the said first resistor near the end thereof opposite said first capacitor.
Claim 3
Dependent Claim
38 words
A direct current system according to claim 1, in which said control element includes transistor means including at least one transistor having the base thereof connected to the said resistor near the end thereof opposite to the capacitor.
Claim 4
Dependent Claim
57 words
A direct current system according to claim 2, in which said transistor means further includes a power transistor having its collector-emitter connected in parallel with said voltage-dropping resistor, and an amplifying transistor having its collector-emitter circuit connected to the base of said power transistor and having its base connected to the collector-emitter circuit of said one transistor.
Claim 5
Dependent Claim
177 words
A direct current system according to claim 3, in which said coil means comprise the coils of a plurality of magnetic valves for a multispeed transmission, each coil having one end connected to the negative side of said source and the other end connected to a respective switch contact, a bus bar, switchblades connected to the bus bar and adapted to close on said contacts, said voltage-droPping resistor connecting said bus bar to the positive side of said source, said first capacitor and first resistor being connected in series in the order named between said bus bar and the negative side of said source, a first PNP transistor having the base thereof connected to the said resistor near the end thereof opposite to the capacitor, a power transistor having its collector-emitter path connected between said bus bar and the positive side of said source, and an amplifying transistor connected between the collector-emitter path of said first transistor and the base of said power transistor and operable to make the latter conductive when said first transistor goes conductive.
Claim 6
Dependent Claim
38 words
A direct current system according to claim 4, in which, during a transmission shifting operation, at least one coil has the current supply thereto interrupted and thereafter at least one other coil has the current supply thereto established.
Claim 7
Dependent Claim
40 words
A direct current system according to claim 4, in which the time constant of the serially arranged first capacitor and first resistor is selected to provide a delay corresponding to the time required to attract an armature to attracted position.
Claim 8
Dependent Claim
71 words
A direct current system according to claim 4, which includes a further resistor between said bus bar and the said contact pertaining to one of said coils, said further resistor having about the same ohmic resistance as said voltage-dropping resistor, and the time constant of said serially arranged first capacitor and first resistor being selected to provide a delay greater than the time required to attract an armature to attracted position.
Claim 9
Dependent Claim
144 words
A direct current system according to claim 4, which includes a further resistor between said bus bar and the said contact pertaining to one of said coils, said further resistor having about the same ohmic resistance as said voltage-dropping resistor, a second contact on which the switchblade pertaining to the last-mentioned contact is adapted to close, and a further capacitor connected between said second contact and the resistor side of said first capacitor, the time constant of said first capacitor and first resistor alone providing for a delay no greater than the time for an armature to move to attracted position and the time constant thereof when said switchblade is closed on said second contact so as to connect said further capacitor in circuit with said first capacitor providing for a delay greater than the time for an armature to move to attracted position.
Claim 10
Dependent Claim
88 words
A direct current system according to claim 8, which includes a further coil having a respectively said contact and a further coil having a respective said contact and a respective switchblade connected to said bus bar and closeable on the contact, a third capacitor connected between the last-mentioned contact and said first resistor near the capacitor end thereof, and a diode poled toward said first resistor and interposed between said first capacitor and the connecting point of said third resistor to the capacitor end of said first resistor.
Claim 11
Dependent Claim
34 words
A direct current system according to claim 4, which includes a diode connected from the negative side of said source to the resistor side of said first capacitor and poled toward said first capacitor.
Claim 12
Dependent Claim
125 words
A circuit for controlling the supply of energy to the coil of electromagnetic means having a moveable armature; a direct current voltage source, a first resistor and a first switch in series with said coil across said source, a second switch actuatable to bypass said first resistor, said circuit also comprising a delay circuit for controlling said second switch, said delay circuit comprising a condenser and a second resistor in series therewith, a transistor having the collector-emitter path connected in controlling relation to said second switch, said capacitor and said second resistor and the base emitter path of said transistor forming a series circuit connected in parallel with said coil, said transistor being operable upon conduction of Said collector-emitter path to actuate said second switch.
Claim 13
Dependent Claim
125 words
A circuit for controlling the supply of energy to the coil of electromagnetic means having a moveable armature; a direct current voltage source, a first resistor and a first switch in series with said coil across said source, a second switch actuatable to bypass said first resistor, said circuit also comprising a delay circuit for controlling said second switch, said delay circuit comprising a condenser and a second resistor in series therewith, a transistor having the collector-emitter path connected in controlling relation to said second switch, said capacitor and said second resistor and the base emitter path of said transistor forming a series circuit connected in parallel with said coil, said transistor being operable upon conduction of Said collector-emitter path to actuate said second switch.
Claim 14
Dependent Claim
68 words
A circuit according to claim 11 in which said transistor is the input stage of a current amplifier circuit, said current amplifier circuit also including an output transistor having its collector-emitter path connected in parallel with said first resistor, an amplifier transistor having the collector-emitter path connected to the base of said output transistor and having a base connected to the collector-emitter path of said first mentioned transistor.
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) | 1974-10-18 | 1975-04-19 | 1975-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-18 | 1979-04-19 | 1979-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-18 | 1983-04-19 | 1983-10-19 | $7700.00 | Window Closed / Lapsed |