BE654691A - - Google Patents
Info
- Publication number
- BE654691A BE654691A BE654691DA BE654691A BE 654691 A BE654691 A BE 654691A BE 654691D A BE654691D A BE 654691DA BE 654691 A BE654691 A BE 654691A
- Authority
- BE
- Belgium
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/10—Measuring sum, difference or ratio
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
- G01N33/0062—General constructional details of gas analysers, e.g. portable test equipment concerning the measuring method, e.g. intermittent, or the display, e.g. digital
- G01N33/0063—General constructional details of gas analysers, e.g. portable test equipment concerning the measuring method, e.g. intermittent, or the display, e.g. digital using a threshold to release an alarm or displaying means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R17/00—Measuring arrangements involving comparison with a reference value, e.g. bridge
- G01R17/10—AC or DC measuring bridges
- G01R17/16—AC or DC measuring bridges with discharge tubes or semiconductor devices in one or more arms of the bridge, e.g. voltmeter using a difference amplifier
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
- G01R19/16566—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533
- G01R19/16576—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533 comparing DC or AC voltage with one threshold
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB41585/63A GB1048426A (en) | 1963-10-22 | 1963-10-22 | Improvements relating to potential difference detecting arrangements |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE654691A true BE654691A (xx) | 1965-02-15 |
Family
ID=10420378
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE654691D BE654691A (xx) | 1963-10-22 | 1964-10-22 |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US3355729A (xx) |
| JP (1) | JPS4326560B1 (xx) |
| BE (1) | BE654691A (xx) |
| DE (1) | DE1256320B (xx) |
| FR (1) | FR1422918A (xx) |
| GB (1) | GB1048426A (xx) |
| NL (1) | NL6412297A (xx) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3548398A (en) * | 1968-01-11 | 1970-12-15 | Walter E Strimling | Switch position and continuity indicator for a pair of heating circuits |
| US3852734A (en) * | 1972-09-28 | 1974-12-03 | R Truax | Antenna insulation failure detector |
| US4025850A (en) * | 1975-10-01 | 1977-05-24 | Joseph Spiteri | Passive, solid state wide range voltage checker |
| FR2417764A1 (fr) * | 1978-02-15 | 1979-09-14 | Nudelmont Jean Claude | Systeme de surveillance du degre de pollution et du risque d'incendie |
| DE4221922C1 (de) * | 1992-07-03 | 1994-01-13 | Bosch Gmbh Robert | Wärmetönungssensor |
| US5953057A (en) * | 1996-09-03 | 1999-09-14 | Sensormatic Electronics Corporation | Video termination detector with data receiver |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2907932A (en) * | 1954-08-16 | 1959-10-06 | Honeywell Regulator Co | Phase discriminating apparatus |
| US2891195A (en) * | 1957-12-03 | 1959-06-16 | Ca Nat Research Council | Lamp flasher with daylight-responsive inhibiting means |
| GB1013682A (en) * | 1960-12-15 | 1965-12-15 | English Electric Co Ltd | Improvements in and relating to gas detecting apparatus |
| NL275018A (xx) * | 1961-02-24 |
-
1963
- 1963-10-22 GB GB41585/63A patent/GB1048426A/en not_active Expired
-
1964
- 1964-10-19 US US404629A patent/US3355729A/en not_active Expired - Lifetime
- 1964-10-20 FR FR992030A patent/FR1422918A/fr not_active Expired
- 1964-10-20 DE DEE27984A patent/DE1256320B/de active Pending
- 1964-10-22 JP JP5966964A patent/JPS4326560B1/ja active Pending
- 1964-10-22 BE BE654691D patent/BE654691A/xx unknown
- 1964-10-22 NL NL6412297A patent/NL6412297A/xx unknown
Also Published As
| Publication number | Publication date |
|---|---|
| US3355729A (en) | 1967-11-28 |
| FR1422918A (fr) | 1966-01-03 |
| JPS4326560B1 (xx) | 1968-11-14 |
| DE1256320B (de) | 1967-12-14 |
| GB1048426A (en) | 1966-11-16 |
| NL6412297A (xx) | 1965-04-23 |