US3766550A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solid-state process control module with indicia to associate output signal with terminal
Assignee: EAGLE SIGNAL CONTROLS CORP A CORP OF DE
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Filing: 1971-03-04
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Granted: 1973-10-16
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Expires: 1991-03-04
Abstract
Abstract There is provided a process control system including a plurality of functional modules for sequencing a plurality of operations of a machine, such as a plastic molding machine, wherein the functional modules include a static electrical control circuit. The static control circuit is comprised of an input circuit for receiving alternating-current signals; static direct-current logic means for performing an electrical function and then providing a direct-current output signal; static direct current to alternating current converter means, such as a triac switching circuit, coupled to the logic means for providing an alternatingcurrent output signal from the direct-current signal; and, actuatable means such as a solenoid controlled valve, coupled to the converter means, for upon energization, providing at least one of the plurality of machine operations.
Inventors
- 👤 J Vandemore
- 👤 D Henry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:26
CPC Classifications
B; B29; B29C; B29C45/00; B29C45/17; B29C45/76; G; G05; G05B; G05B19/00; G05B19/02; G05B19/04; G05B19/07; G05B2219/00; G05B2219/20; G05B2219/25; G05B2219/25263; G05B2219/25315
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
249 words
A module for use in a process control apparatus of the type having a selectively operable alternating current output and an alternating current input having active and inactive conditions said module comprising: a circuit board having a solid-state electrical control circuit mounted thereon; said electrical control circuit including first converter means for converting said alternating current input to a direct current signal when said alternative current input is in said active condition, a direct current logic circuit means including means for creating a first binary logic output signal when said direct current signal exists and means for creating a second binary logic output signal at times other than when said direct current signal exists, second converter means for converting said direct current signal into said alternating current output, said second converter means including means for inhibiting said second converter means and means responsive to one of said logic output signals for operating said inhibiting means of said second converter means; a first set of terminal means on said circuit board and means for connecting said first set of terminal means to said first converter means: a second set of terminal means on said circuit board, and means for connecting said second set of terminal means to said alternating current output: and, said circuit board including a member adjacent said second set of terminal means and indicia means on said member for visually indicating the state of said alternating current output for a selected condition of said alternating current input.
Claim 2
Dependent Claim
249 words
A module for use in a process control apparatus of the type having a selectively operable alternating current output and an alternating current input having active and inactive conditions said module comprising: a circuit board having a solid-state electrical control circuit mounted thereon; said electrical control circuit including first converter means for converting said alternating current input to a direct current signal when said alternative current input is in said active condition, a direct current logic circuit means including means for creating a first binary logic output signal when said direct current signal exists and means for creating a second binary logic output signal at times other than when said direct current signal exists, second converter means for converting said direct current signal into said alternating current output, said second converter means including means for inhibiting said second converter means and means responsive to one of said logic output signals for operating said inhibiting means of said second converter means; a first set of terminal means on said circuit board and means for connecting said first set of terminal means to said first converter means: a second set of terminal means on said circuit board, and means for connecting said second set of terminal means to said alternating current output: and, said circuit board including a member adjacent said second set of terminal means and indicia means on said member for visually indicating the state of said alternating current output for a selected condition of said alternating current input.
Claim 3
Dependent Claim
29 words
A module as defined in claim 1 including means for causing a time delay before said logic circuit means creates at least one of said binary logic output signals.
Claim 4
Dependent Claim
116 words
A module as defined in claim 2 wherein said time delay means includes coded means for creating a first set of successive binary bits in said first binary logic output signal and a second set of successive binary bits in said first binary logic output signal, said coded means includes a third set of terminal means on said board for selecting said first set of successive binary bits and a fourth set of terminal means on said board for selecting said second set of successive bits and indicia means on said board and adjacent each of said third and fourth terminal means for indicating the respective successive bits controlled by said third and fourth terminal means.
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) | 1976-10-15 | 1977-04-16 | 1977-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-15 | 1981-04-16 | 1981-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-15 | 1985-04-16 | 1985-10-16 | $7700.00 | Window Closed / Lapsed |