US3719925A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic control for machine tools and the like
Assignee: Westinghouse Electric Corp
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Filing: 1971-02-11
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Granted: 1973-03-06
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Expires: 1991-02-11
Abstract
Abstract An electronic control having a plurality of electronic circuit cards for controlling the operation of various elements of a machine in accordance with commands received from transducers such as limit switches on the machine. One or more interface circuit cards receive AC signals from the transducers on the machine and convert these signals to DC output signals which are in turn supplied to a control card. The control card comprises a DC logic circuit which is responsive to the DC signals supplied by the interface cards to provide a DC control signal. The control card further includes a DC-AC converter which is responsive exclusively to the DC control signal for supplying an AC control signal to an electromechanical control device for controlling the particular operation of a particular machine element with which that control card is associated. Because this electromechanical control device is responsive only to this particular AC control signal, the entire logic circuitry for controlling that particular operation of that particular machine element is contained on a single circuit card. The circuit cards are also provided with indicating lamps which display the electrical status of the control to facilitate trouble shooting whenever there is a malfunction.
Inventors
- 👤 A Vinch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:23
CPC Classifications
G; G05; G05B; G05B19/00; G05B19/02; G05B19/04; G05B19/08
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
298 words
In an electronic control of the circuit card type for controlling the operation of an element of a machine in predetermined relationship to the operation of other elements of the machine, the combination comprising at least one interface circuit card comprising a plurality of input terminals adapted to be electrically connected to selected transducers which supply AC signals in response to the operation of selected machine elements, a plurality of output terminals and means for converting an AC signal at each of its input terminals to a DC output signal at a corresponding output terminal, a control circuit card comprising a solid state DC logic circuit and a plurality of input terminals electrically connected with said logic circuit and means for electrically connecting selected input terminals on said control card with selected output terminals on said interface card, said logic circuit comprising a plurality of electronic logic elements arranged to respond to the DC output signals at said selected output terminals of said interface card to which said logic circuit is electrically connected for providing a DC control signal, said control circuit card further comprising means responsive to said DC control signal for supplying an AC control signal to control the operation of said machine element, said AC control signal being the sole AC control signal supplied by said electronic control for controlling the operation of said machine element, said means for supplying said AC control signal being exclusively responsive to said DC control signal, said DC control signal being derived exclusively from the response of the DC logic circuitry on said control card to the DC output signals at said selected output terminals of said interface card, whereby the entire logic circuit for controlling the operation of said machine element is provided on a single circuit card.
Claim 2
Dependent Claim
298 words
In an electronic control of the circuit card type for controlling the operation of an element of a machine in predetermined relationship to the operation of other elements of the machine, the combination comprising at least one interface circuit card comprising a plurality of input terminals adapted to be electrically connected to selected transducers which supply AC signals in response to the operation of selected machine elements, a plurality of output terminals and means for converting an AC signal at each of its input terminals to a DC output signal at a corresponding output terminal, a control circuit card comprising a solid state DC logic circuit and a plurality of input terminals electrically connected with said logic circuit and means for electrically connecting selected input terminals on said control card with selected output terminals on said interface card, said logic circuit comprising a plurality of electronic logic elements arranged to respond to the DC output signals at said selected output terminals of said interface card to which said logic circuit is electrically connected for providing a DC control signal, said control circuit card further comprising means responsive to said DC control signal for supplying an AC control signal to control the operation of said machine element, said AC control signal being the sole AC control signal supplied by said electronic control for controlling the operation of said machine element, said means for supplying said AC control signal being exclusively responsive to said DC control signal, said DC control signal being derived exclusively from the response of the DC logic circuitry on said control card to the DC output signals at said selected output terminals of said interface card, whereby the entire logic circuit for controlling the operation of said machine element is provided on a single circuit card.
Claim 3
Dependent Claim
298 words
In an electronic control of the circuit card type for controlling the operation of an element of a machine in predetermined relationship to the operation of other elements of the machine, the combination comprising at least one interface circuit card comprising a plurality of input terminals adapted to be electrically connected to selected transducers which supply AC signals in response to the operation of selected machine elements, a plurality of output terminals and means for converting an AC signal at each of its input terminals to a DC output signal at a corresponding output terminal, a control circuit card comprising a solid state DC logic circuit and a plurality of input terminals electrically connected with said logic circuit and means for electrically connecting selected input terminals on said control card with selected output terminals on said interface card, said logic circuit comprising a plurality of electronic logic elements arranged to respond to the DC output signals at said selected output terminals of said interface card to which said logic circuit is electrically connected for providing a DC control signal, said control circuit card further comprising means responsive to said DC control signal for supplying an AC control signal to control the operation of said machine element, said AC control signal being the sole AC control signal supplied by said electronic control for controlling the operation of said machine element, said means for supplying said AC control signal being exclusively responsive to said DC control signal, said DC control signal being derived exclusively from the response of the DC logic circuitry on said control card to the DC output signals at said selected output terminals of said interface card, whereby the entire logic circuit for controlling the operation of said machine element is provided on a single circuit card.
Claim 4
Dependent Claim
298 words
In an electronic control of the circuit card type for controlling the operation of an element of a machine in predetermined relationship to the operation of other elements of the machine, the combination comprising at least one interface circuit card comprising a plurality of input terminals adapted to be electrically connected to selected transducers which supply AC signals in response to the operation of selected machine elements, a plurality of output terminals and means for converting an AC signal at each of its input terminals to a DC output signal at a corresponding output terminal, a control circuit card comprising a solid state DC logic circuit and a plurality of input terminals electrically connected with said logic circuit and means for electrically connecting selected input terminals on said control card with selected output terminals on said interface card, said logic circuit comprising a plurality of electronic logic elements arranged to respond to the DC output signals at said selected output terminals of said interface card to which said logic circuit is electrically connected for providing a DC control signal, said control circuit card further comprising means responsive to said DC control signal for supplying an AC control signal to control the operation of said machine element, said AC control signal being the sole AC control signal supplied by said electronic control for controlling the operation of said machine element, said means for supplying said AC control signal being exclusively responsive to said DC control signal, said DC control signal being derived exclusively from the response of the DC logic circuitry on said control card to the DC output signals at said selected output terminals of said interface card, whereby the entire logic circuit for controlling the operation of said machine element is provided on a single circuit card.
Claim 5
Dependent Claim
339 words
In combination an electronic control of the circuit card type, a machine, and means for electrically connecting said control to said machine, said machine comprising a plurality of operative machine elements, electromechanical control means for controlling the operation of one of said machine elements in response to an AC electrical control signal from said electronic control and a plurality of transducers for supplying AC signals to said electronic control in response to the operation of selected machine elements, said electronic control comprising at least one interface circuit card, a control circuit card and means for electrically connecting said two cards, said interface circuit card comprising a plurality of input terminals electrically connected to selected transducers, a plurality of output terminals and means for converting an AC signal at each of its input terminals to a DC output signal at a corresponding output terminal, said control circuit card comprising a solid state DC logic circuit and a plurality of Input terminals electrically connected with said logic circuit, selected input terminals on said control card being electrically connected with selected output terminals on said interface card, said logic circuit comprising a plurality of electronic logic elements arranged to respond to the DC output signals at said selected output terminals of said interface card to which said logic circuit is electrically connected for providing a DC control signal, said control circuit card further comprising means responsive to said DC control signal for providing said AC control signal, said AC control signal being the sole AC control signal supplied by said electronic control to which said electromechanical control means is responsive, said means for providing said AC control signal being exclusively responsive to said DC control signal, said DC control signal being derived exclusively from the response of the DC logic circuitry on said control card to the DC output signals at said selected output terminals of said interface cards, whereby the entire logic circuit for controlling the operation of said one of said machine elements is provided on a single circuit card.
Claim 6
Dependent Claim
339 words
In combination an electronic control of the circuit card type, a machine, and means for electrically connecting said control to said machine, said machine comprising a plurality of operative machine elements, electromechanical control means for controlling the operation of one of said machine elements in response to an AC electrical control signal from said electronic control and a plurality of transducers for supplying AC signals to said electronic control in response to the operation of selected machine elements, said electronic control comprising at least one interface circuit card, a control circuit card and means for electrically connecting said two cards, said interface circuit card comprising a plurality of input terminals electrically connected to selected transducers, a plurality of output terminals and means for converting an AC signal at each of its input terminals to a DC output signal at a corresponding output terminal, said control circuit card comprising a solid state DC logic circuit and a plurality of Input terminals electrically connected with said logic circuit, selected input terminals on said control card being electrically connected with selected output terminals on said interface card, said logic circuit comprising a plurality of electronic logic elements arranged to respond to the DC output signals at said selected output terminals of said interface card to which said logic circuit is electrically connected for providing a DC control signal, said control circuit card further comprising means responsive to said DC control signal for providing said AC control signal, said AC control signal being the sole AC control signal supplied by said electronic control to which said electromechanical control means is responsive, said means for providing said AC control signal being exclusively responsive to said DC control signal, said DC control signal being derived exclusively from the response of the DC logic circuitry on said control card to the DC output signals at said selected output terminals of said interface cards, whereby the entire logic circuit for controlling the operation of said one of said machine elements is provided on a single circuit card.
Claim 7
Dependent Claim
66 words
The combination called for in claim 2 including indicating means on at least one of said cards having indicia on selected portions thereof and lighting means electrically connected with the circuitry on said one of said cards for selectively lighting said selected portions in response to the electrical status of the circuitry on said one of said cards to which said lighting means is electrically connected.
Claim 8
Dependent Claim
68 words
The combination called for in claim 2 including indicating means on said at least one interface circuit card having indicia on a selected portion thereof comprising a representation of one of said selected transducers and lighting means electrically connected with said one transducer for lighting said indicia in response to actuation of said one transducer whereby a visual indication of the actuation of said one transducer is provided.
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) | 1976-03-05 | 1976-09-04 | 1977-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-05 | 1980-09-04 | 1981-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-05 | 1984-09-04 | 1985-03-06 | $7700.00 | Window Closed / Lapsed |