US4356486A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Telemetering system for operating room and the like
Assignee: MEDIMETRIC Co
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Filing: 1980-03-24
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Granted: 1982-10-26
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Expires: 2000-03-24
Abstract
Abstract A system for telemetering data from a patient to a monitor permitting direct connection of patient's sensors and transducers to the monitor and permitting telemetering by radio or wire without requiring changes in transducer or monitor design or adjustment or calibration. A telemetering system which presents to the monitor a variable resistance identical to the varying resistance produced by a transducer at the patient. A temperature transmission channel wherein a thermistor resistance is connected in a bridge circuit which is balanced by successive trials of a set of resistors digitally selected by a counter and comparator. The code for the selected value which produces balance is transmitted to the monitor station where it is used to actuate an identical set of resistors to reproduce the input resistance value.
Inventors
- 👤 Bruce E. Mount
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:23
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/0002; A61B5/0004; A61B5/0008; G; G16; G16H; G16H40/00; G16H40/60; G16H40/63; G16H40/67; G16H10/00; G16H10/60; Y; Y10; Y10S; Y10S128/00; Y10S128/903
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
265 words
A telemetering system for transmitting temperature information between a temperature probe and a temperature monitor, said probe including a resistor with the resistance thereof varying as a function of its temperature, including in combination: a transmission link having transmitter and receiver; a bridge circuit including means for connecting said probe resistor in an arm of said bridge circuit; a plurality of resistors connected as a first resistor bank; first switch means for selectively connecting resistors of said first resistor bank in an arm of said bridge circuit; a counter for actuating said first switch means as a function of the count state of said counter; first storage means for storing the count state of said counter; comparator means for producing an output signal when said bridge circuit is balanced and fixing the count state in said first storage means; means for connecting said count state from said first storage means as one signal of said transmission link and representing said probe resistance; means for producing a reference signal for said counter; a plurality of resistors connected as a second resistor bank; second switch means for selectively connecting resistors of said second resistor bank as an input to said monitor; second storage means for actuating said second switch means as a function of the count state of said counter; and means for connecting said count state from said transmission link and said reference signal to said second storage means as inputs for fixing the switches in said second switch means to selectively connect said second resistor bank identically to the connection of said first resistor bank.
Claim 2
Dependent Claim
265 words
A telemetering system for transmitting temperature information between a temperature probe and a temperature monitor, said probe including a resistor with the resistance thereof varying as a function of its temperature, including in combination: a transmission link having transmitter and receiver; a bridge circuit including means for connecting said probe resistor in an arm of said bridge circuit; a plurality of resistors connected as a first resistor bank; first switch means for selectively connecting resistors of said first resistor bank in an arm of said bridge circuit; a counter for actuating said first switch means as a function of the count state of said counter; first storage means for storing the count state of said counter; comparator means for producing an output signal when said bridge circuit is balanced and fixing the count state in said first storage means; means for connecting said count state from said first storage means as one signal of said transmission link and representing said probe resistance; means for producing a reference signal for said counter; a plurality of resistors connected as a second resistor bank; second switch means for selectively connecting resistors of said second resistor bank as an input to said monitor; second storage means for actuating said second switch means as a function of the count state of said counter; and means for connecting said count state from said transmission link and said reference signal to said second storage means as inputs for fixing the switches in said second switch means to selectively connect said second resistor bank identically to the connection of said first resistor bank.
Claim 3
Dependent Claim
59 words
A system as defined in claim 1 wherein the contents of said first storage means continuously changes as said count state changes, and including: means for connecting said comparator means output signal to said counter for stopping counting; and means for transferring the contents of said first storage means to said transmission link after said counter has stopped counting.
Claim 4
Dependent Claim
36 words
A system as defined in claim 2 wherein said counter has a parallel output to said first switch means and first storage means, and said first storage means has a serial output to said transmission link.
Claim 5
Dependent Claim
457 words
A telemetering system for transmitting temperature information between first and second temperature probes and a temperature monitor, each of said probes including a resistor with the resistance thereof varying as a function of its temperature, including in combination: a multisignal transmission link having transmitter and receiver; a first bridge circuit including means for connecting said first probe resistor in an arm of said first bridge circuit; a plurality of resistors connected as a first resistor bank; first switch means for selectively connecting resistors of said first resistor bank in an arm of said first bridge circuit; a first counter for actuating said first switch means as a function of the count state of said first counter; first storage means for storing the count state of said first counter; first comparator means for producing an output signal when said first bridge circuit is balanced and fixing the count state in said first storage means; a second bridge circuit including means for connecting said second probe resistor in an arm of said second bridge circuit; means for producing a reference signal for said counter; a plurality of resistors connected as a second resistor bank; second switch means for selectively connecting resistors of said second resistor bank in an arm of said second bridge circuit; a second counter for actuating said second switch means as a function of the count state of said second counter; second storage means for storing the count state of said second counter; second comparator means for producing an output signal when said second bridge circuit is balanced and fixing the count state in said second storage means; means for connecting said count states from said first and second storage means as one signal of said transmission link and representing said first and second probe resistances; a plurality of resistors connected as a third resistor bank; third switch means for selectively connecting resistors of said third resistor bank as an input to said monitor; third storage means for actuating said third switch means as a function of the count state of said first counter; first means for connecting one count state from said transmission link and said reference signal to said third storage means as inputs for fixing the switches in said third switch means; a plurality of resistors connected as a fourth resistor bank; fourth switch means for selectively connecting resistors of said fourth resistor bank as an input to said monitor; fourth storage means for actuating said fourth switch means as a function of the count state of said second counter; and second means for connecting the other count state from said transmission link and said reference signal to said fourth storage means as inputs for fixing the switches in said fourth switch means.
Claim 6
Dependent Claim
457 words
A telemetering system for transmitting temperature information between first and second temperature probes and a temperature monitor, each of said probes including a resistor with the resistance thereof varying as a function of its temperature, including in combination: a multisignal transmission link having transmitter and receiver; a first bridge circuit including means for connecting said first probe resistor in an arm of said first bridge circuit; a plurality of resistors connected as a first resistor bank; first switch means for selectively connecting resistors of said first resistor bank in an arm of said first bridge circuit; a first counter for actuating said first switch means as a function of the count state of said first counter; first storage means for storing the count state of said first counter; first comparator means for producing an output signal when said first bridge circuit is balanced and fixing the count state in said first storage means; a second bridge circuit including means for connecting said second probe resistor in an arm of said second bridge circuit; means for producing a reference signal for said counter; a plurality of resistors connected as a second resistor bank; second switch means for selectively connecting resistors of said second resistor bank in an arm of said second bridge circuit; a second counter for actuating said second switch means as a function of the count state of said second counter; second storage means for storing the count state of said second counter; second comparator means for producing an output signal when said second bridge circuit is balanced and fixing the count state in said second storage means; means for connecting said count states from said first and second storage means as one signal of said transmission link and representing said first and second probe resistances; a plurality of resistors connected as a third resistor bank; third switch means for selectively connecting resistors of said third resistor bank as an input to said monitor; third storage means for actuating said third switch means as a function of the count state of said first counter; first means for connecting one count state from said transmission link and said reference signal to said third storage means as inputs for fixing the switches in said third switch means; a plurality of resistors connected as a fourth resistor bank; fourth switch means for selectively connecting resistors of said fourth resistor bank as an input to said monitor; fourth storage means for actuating said fourth switch means as a function of the count state of said second counter; and second means for connecting the other count state from said transmission link and said reference signal to said fourth storage means as inputs for fixing the switches in said fourth switch means.
Claim 7
Dependent Claim
212 words
A telemetering system for transmitting resistance values between a first variable resistor and a monitor, including in combination: a transmission link having transmitter and receiver; a bridge circuit including means for connecting said first variable resistor in an arm of said bridge circuit; second variable resistance means; first means for connecting said second variable resistance means in an arm of said bridge circuit; a counter for actuating said first means for connecting as a function of the count state of said counter; first storage means for storing the count state of said counter; comparator means for producing an output signal when said bridge circuit is balanced and fixing the count state in said first storage means; means for connecting said count state from said first storage means as one signal of said transmission link and representing said first variable resistor; means for producing a reference signal for said counter; third variable resistance means; second means for connecting said third variable resistance means as an input to said monitor; second storage means for actuating said second means for connecting as a function of the count state of said counter; and means for connecting said count state from said transmission link and said reference signal as inputs for fixing said third variable resistance means.
Claim 8
Dependent Claim
212 words
A telemetering system for transmitting resistance values between a first variable resistor and a monitor, including in combination: a transmission link having transmitter and receiver; a bridge circuit including means for connecting said first variable resistor in an arm of said bridge circuit; second variable resistance means; first means for connecting said second variable resistance means in an arm of said bridge circuit; a counter for actuating said first means for connecting as a function of the count state of said counter; first storage means for storing the count state of said counter; comparator means for producing an output signal when said bridge circuit is balanced and fixing the count state in said first storage means; means for connecting said count state from said first storage means as one signal of said transmission link and representing said first variable resistor; means for producing a reference signal for said counter; third variable resistance means; second means for connecting said third variable resistance means as an input to said monitor; second storage means for actuating said second means for connecting as a function of the count state of said counter; and means for connecting said count state from said transmission link and said reference signal as inputs for fixing said third variable resistance means.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-10-25 | 1986-04-26 | 1986-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-10-25 | 1990-04-26 | 1990-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-10-25 | 1994-04-26 | 1994-10-26 | $7700.00 | Window Closed / Lapsed |