Patent US3214677A successfully refreshed from Google Patents.
US3236451A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermocouple indication and control apparatus
Assignee: Honeywell Inc
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Filing: 1963-05-08
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Granted: 1966-02-22
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Expires: 1983-05-08
Abstract
No abstract record available.
Inventors
- 👤 Harold C Josephs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:16
CPC Classifications
G; G01; G01K; G01K7/00; G01K7/02; G01K7/026; G01K7/021
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
140 words
A THERMOCOUPLE TEMPERATURE INDICATING AND CONTROL APPARATUS; A THERMOCOUPLE HOT JUNCTION ADAPTED TO BE SUBJECTED TO THE TEMPERATURE WHICH IS TO BE INDICATED AND TO BE CONTROLLED; A SOURCE OF D.C. VOLTAGE; A TEMPERATURE SENSITIVE BRIDGE NETWORK INCLUDING A TEMPERATURE SENSITIVE ELEMENT FORMING AN AMBIENT TEMPERATURE COMPENSATED COLD JUNCTION HAVING FIRST AND SECOND VOLTAGE DIVIDERS CONNECTED IN PARALLEL TO SAID SOURCE OF VOLTAGE; FIRST AMPLIFIER MEANS HAVING AN INPUT AND AN OUTPUT; CYCLING SWITCH MEANS CONNECTED TO THE INPUT AND TO THE OUTPUT OF SAID FIRST AMPLIFIER MEANS TO SYNCHRONOUSLY CHOP THE INPUT AND OUTPUT; A D.C. TEMPERATURE INDICATING METER CONNECTED TO THE OUTPUT OF SAID FIRST AMPLIFIER MEANS; CIRCUIT MEANS CONNECTING THE INPUT OF SAID FIRST AMPLIFIER MEANS TO A FIXED TERMINAL ON SAID FIRST VOLTAGE DIVIDER AND THROUGH SAID HOT THERMOCOUPLE JUNCTION TO A FIXED TERMINAL ON SAID
Claim 2
Dependent Claim
140 words
A THERMOCOUPLE TEMPERATURE INDICATING AND CONTROL APPARATUS; A THERMOCOUPLE HOT JUNCTION ADAPTED TO BE SUBJECTED TO THE TEMPERATURE WHICH IS TO BE INDICATED AND TO BE CONTROLLED; A SOURCE OF D.C. VOLTAGE; A TEMPERATURE SENSITIVE BRIDGE NETWORK INCLUDING A TEMPERATURE SENSITIVE ELEMENT FORMING AN AMBIENT TEMPERATURE COMPENSATED COLD JUNCTION HAVING FIRST AND SECOND VOLTAGE DIVIDERS CONNECTED IN PARALLEL TO SAID SOURCE OF VOLTAGE; FIRST AMPLIFIER MEANS HAVING AN INPUT AND AN OUTPUT; CYCLING SWITCH MEANS CONNECTED TO THE INPUT AND TO THE OUTPUT OF SAID FIRST AMPLIFIER MEANS TO SYNCHRONOUSLY CHOP THE INPUT AND OUTPUT; A D.C. TEMPERATURE INDICATING METER CONNECTED TO THE OUTPUT OF SAID FIRST AMPLIFIER MEANS; CIRCUIT MEANS CONNECTING THE INPUT OF SAID FIRST AMPLIFIER MEANS TO A FIXED TERMINAL ON SAID FIRST VOLTAGE DIVIDER AND THROUGH SAID HOT THERMOCOUPLE JUNCTION TO A FIXED TERMINAL ON SAID
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) | 1969-02-21 | 1969-08-23 | 1970-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-21 | 1973-08-23 | 1974-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-21 | 1977-08-23 | 1978-02-22 | $7700.00 | Window Closed / Lapsed |