Patent US3697776A successfully refreshed from Google Patents.
US3697776A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plural channel system wherein the input signals are unaltered if within standard limits, but are averaged, if outside limits
Assignee: Bodenseewerk Geratetechnik GmbH
•
Filing: 1970-12-15
•
Granted: 1972-10-10
•
Expires: 1990-12-15
Abstract
Abstract A control apparatus has redundant input signals from which an output signal is produced. In part it comprises three inputs to which the respective input signals are applied and three outputs. There are three resistors of known value with each connecting a respective input and a respective output. There are six resistance devices each connecting a respective input with one of the remaining outputs between which there is not one of the resistors. The resistance devices comprise a voltage sensitive double-pole whose resistance substantially equals said known value below a selected threshold voltage but which becomes very great above said threshold voltage. The threshold voltage is selected to be sufficiently greater than the normal input voltage to represent a malfunction situation.
Inventors
- 👤 Edgar Matejka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:11
CPC Classifications
G; G05; G05D; G05D1/00; G05D1/0055; G05D1/0077; G06; G06G; G06G7/00; G06G7/12; G06G7/14; G06G7/25
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
147 words
In an apparatus for forming the mean value of several input voltages in synchronizing signals in redundant systems including a plurality of system inputs and a plurality of system outputs, and a plurality of branches each having an individual input and having a common output with resistor means in each branch, there being one of said branches between each system input and each system output respectively, the improvement comprising: a first of the branches connected to each one of the system inputs having a said resistor means comprising a voltage insensitive resistor of a given magnitude, each said first branch connecting a respective system input with a respective system output, the remaining branches connected to each system output each comprising a voltage sensitive double-pole whose resistance value becomes very great above a predetermined voltage threshold and below said voltage threshold is substantially equal to said given magnitude.
Claim 2
Dependent Claim
147 words
In an apparatus for forming the mean value of several input voltages in synchronizing signals in redundant systems including a plurality of system inputs and a plurality of system outputs, and a plurality of branches each having an individual input and having a common output with resistor means in each branch, there being one of said branches between each system input and each system output respectively, the improvement comprising: a first of the branches connected to each one of the system inputs having a said resistor means comprising a voltage insensitive resistor of a given magnitude, each said first branch connecting a respective system input with a respective system output, the remaining branches connected to each system output each comprising a voltage sensitive double-pole whose resistance value becomes very great above a predetermined voltage threshold and below said voltage threshold is substantially equal to said given magnitude.
Claim 3
Dependent Claim
97 words
In an apparatus as set forth in claim 1, wherein each voltage sensitive double-pole includes a field effect transistor having three connections a first of which is a base connection, a diode and a resistor connected in series between the first and a second of the transistor connections with a first juncture therebetween, a diode and a resistor connected in series between the first and a third of the transistor connections with a second juncture therebetween, a balancing resistor, said junctures and said balancing resistor being connected in series between the branch output and the branch input.
Claim 4
Dependent Claim
65 words
In an apparatus as set forth in claim 2 including an operational amplifier having an input and an output connected in the series circuit between the branch input and output, the amplifier output being connected to the first juncture, a negative feedback circuit including a resistor connecting the second juncture with the amplifier input, and a resistor connecting the amplifier input to the branch input.
Claim 5
Dependent Claim
43 words
In an apparatus as set forth in claim 1, wherein each voltage sensitive double-pole includes a pair of field effect transistors conNected back-to-back by a pair of resistors and in series with a balancing resistor between the branch input and the branch output.
Claim 6
Dependent Claim
16 words
In an apparatus as set forth in claim 1, wherein the double-pole includes a cold conductor.
Claim 7
Dependent Claim
119 words
In an apparatus for forming the mean value of several input voltages and comprising a plurality of signal inputs, a common signal output, resistor means connected between each of said signal inputs and said common signal output and having a substantially linear resistance characteristic in the normal operating range, and a load resistor connected to said common output, whereby the signal obtained at said common signal output under normal operating conditions is proportional to the arithmetic mean value of said input voltages, the improvement comprising: at least all but one of said resistor means having a voltage sensitive over-all resistance, which becomes very large above a predetermined voltage threshold defined by the upper end of said normal operating range.
Claim 8
Dependent Claim
119 words
In an apparatus for forming the mean value of several input voltages and comprising a plurality of signal inputs, a common signal output, resistor means connected between each of said signal inputs and said common signal output and having a substantially linear resistance characteristic in the normal operating range, and a load resistor connected to said common output, whereby the signal obtained at said common signal output under normal operating conditions is proportional to the arithmetic mean value of said input voltages, the improvement comprising: at least all but one of said resistor means having a voltage sensitive over-all resistance, which becomes very large above a predetermined voltage threshold defined by the upper end of said normal operating range.
Claim 9
Dependent Claim
24 words
In an apparatus as set forth in claim 6, wherein said all but one of said resistor means is a voltage sensitive double pole.
Claim 10
Dependent Claim
97 words
In an apparatus as set forth in claim 7, wherein each voltage sensitive double-pole includes a field effect transistor having three connections a first of which is a base connection, a diode and a resistor connected in series between the first and a second of the transistor connections with a first juncture therebetween, a diode and a resistor connected in series between the first and a third of the transistor connections with a second juncture therebetween, a balancing resistor, said junctures and said balancing resistor being connected in series between the branch output and the branch input.
Claim 11
Dependent Claim
65 words
In an apparatus as set forth in claim 8 including an operational amplifier having an input and an output connected in the series circuit between the branch input and output, the amplifier output being connected to the first juncture, a negative feedback circuit including a resistor connecting the second juncture with the amplifier input, and a resistor connecting the amplifier input to the branch input.
Claim 12
Dependent Claim
43 words
In an apparatus as set forth in claim 7, wherein each voltage sensitive double-pole includes a pair of field effect transistors connected back-to-back by a pair of resistors and in series with a balancing resistor between the branch input and the branch output.
Claim 13
Dependent Claim
16 words
In an apparatus as set forth in claim 7, wherein the double-pole includes a cold conductor.
References Cited (Backward Citations)
US3243585A
Cited
US3333180A
Cited
US3492588A
Cited
US3369129A
Cited
US3489889A
Cited
US3551824A
Cited
US3521087A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-10 | 1976-04-10 | 1976-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-10 | 1980-04-10 | 1980-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-10 | 1984-04-10 | 1984-10-10 | $7700.00 | Window Closed / Lapsed |