US3796924A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric control system for actuating in a predetermined sequence a plurality of electro-magnetic relays
Assignee: Redon Trust
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Filing: 1972-12-29
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Granted: 1974-03-12
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Expires: 1992-12-29
Abstract
Abstract An electric control device for activating, according to a predetermined sequence, a plurality of electromagnetic relays, comprising an electronic program-switch connected to the relays by means of only three conductors only, two of which provide control signals and the other being a common return. Suitable change-over switches are included, so that the electric pulses alternatively sent through the program-switch onto the two control conductors, give rise to the sequential activation of said relays. The program-switch comprises: a transistor electronic circuit for generating controlling the frequency, duration and stability of the pulses, and a rotary relay, which when energized by a servo-relay, switches the pulses, alternatively, between the two control conductors. The programswitch also includes too a secondary electronic circuit for the control of the connection of the relays to the program-switch, and for adjusting the operation of the relays, each relay being connected to the return conductor through a change-over switch acted on by the preceding relay.
Inventors
- 👤 L Fontana
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:13
CPC Classifications
G; G05; G05B; G05B19/00; G05B19/02; G05B19/04; G05B19/07; H; H01; H01H; H01H47/00; H01H47/001
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
136 words
An electronic control device for activating a plurality of relays in a predetermined sequence, comprising: a program switch connected to said relays by means of only three conductors, two of which couple control pulses to said relays, and the other of which provides a common return; said program switch including: a transistor circuit for generating and controlling the frequency, duration and stability of a train of pulses; a rotary relay for alternately coupling said pulses to one or the other of said two conductors; means, including a servo-relay, for coupling said transistor circuit to said rotary relay; means, including a secondary electronic circuit, for controlling the connection of said relays to said program switch and for adjusting the function of said relays; and means associated with each relay for activating the next relay in said sequence.
Claim 2
Dependent Claim
136 words
An electronic control device for activating a plurality of relays in a predetermined sequence, comprising: a program switch connected to said relays by means of only three conductors, two of which couple control pulses to said relays, and the other of which provides a common return; said program switch including: a transistor circuit for generating and controlling the frequency, duration and stability of a train of pulses; a rotary relay for alternately coupling said pulses to one or the other of said two conductors; means, including a servo-relay, for coupling said transistor circuit to said rotary relay; means, including a secondary electronic circuit, for controlling the connection of said relays to said program switch and for adjusting the function of said relays; and means associated with each relay for activating the next relay in said sequence.
Claim 3
Dependent Claim
50 words
A control device, as claimed in claim 1, characterized in that the last relay in said sequence of the apparatus acts upon a change-over switch which inserts into the common return conductor a resistor fit to control a transistor in said secondary circuit which signals the end of the sequence.
Claim 4
Dependent Claim
23 words
A control device, as claimed in claim 1, characterized in that the program-switch includes means for varying the frequency of said pulse train.
Claim 5
Dependent Claim
42 words
A device as claimed in claim 6 characterized in that the rotary relay of the program-switch comprises two auxiliary electric contacts placed in such a manner that the start pulse, transmitted from the program-switch is always coupled onto the same control conductor.
Claim 6
Dependent Claim
35 words
A control device as claimed in claim 6, characterized in that the program-switch includes means having an electronic circuit for signalling whether the relays are connected to the program-switch and whether the sequence has ended.
Claim 7
Dependent Claim
127 words
A control system for successively actuating a plurality of electromagnetic relays, comprising an array of relays, a program switching circuit for generating control pulses, three and only three conductors connecting said switching circuit to said relays, two of said conductors coupling the control pulses from said switching circuit to said relays, the third conductor serving as a common return, each of said relays having transfer switch means for successively connecting each of said relays to said return conductor, said switching circuit generating and stabilizing and transmitting a train of control pulses to one or both of said two conductors so that successive control pulses activate a different one of said relays, said switching circuit including means for monitoring the connection between said switching circuit and said relays.
Claim 8
Dependent Claim
127 words
A control system for successively actuating a plurality of electromagnetic relays, comprising an array of relays, a program switching circuit for generating control pulses, three and only three conductors connecting said switching circuit to said relays, two of said conductors coupling the control pulses from said switching circuit to said relays, the third conductor serving as a common return, each of said relays having transfer switch means for successively connecting each of said relays to said return conductor, said switching circuit generating and stabilizing and transmitting a train of control pulses to one or both of said two conductors so that successive control pulses activate a different one of said relays, said switching circuit including means for monitoring the connection between said switching circuit and said relays.
Claim 9
Dependent Claim
40 words
The control system as in claim 6, further comprising a resistor and a lamp, the transfer switch means of the last of the successively actuated relays connecting said resistor to said return conductor and causing said lamp to be illuminated.
Claim 10
Dependent Claim
24 words
The control system as in claim 6, wherein said program switching circuit includes means for varying the pulse rate of said control pulse train.
Claim 11
Dependent Claim
26 words
The system as in claim 6, wherein said program switch includes means for alternately applying control pulses to one or the other of the two conductors.
Claim 12
Dependent Claim
31 words
The system as in claim 6, wherein said program switch includes means for monitoring the operation of said relays and for indicating that proper operation of said relays has taken place.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-03-11 | 1977-09-10 | 1978-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-11 | 1981-09-10 | 1982-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-11 | 1985-09-10 | 1986-03-12 | $7700.00 | Window Closed / Lapsed |