GB1466270A - Semiconductor devices - Google Patents
Semiconductor devicesInfo
- Publication number
- GB1466270A GB1466270A GB4622074A GB4622074A GB1466270A GB 1466270 A GB1466270 A GB 1466270A GB 4622074 A GB4622074 A GB 4622074A GB 4622074 A GB4622074 A GB 4622074A GB 1466270 A GB1466270 A GB 1466270A
- Authority
- GB
- United Kingdom
- Prior art keywords
- semi
- wall
- conductor
- april
- seal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
- G01F23/24—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of resistance of resistors due to contact with conductor fluid
- G01F23/246—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of resistance of resistors due to contact with conductor fluid thermal devices
- G01F23/247—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of resistance of resistors due to contact with conductor fluid thermal devices for discrete levels
Landscapes
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Cooling Or The Like Of Semiconductors Or Solid State Devices (AREA)
Abstract
1466270 Semi-conductor devices MULLARD Ltd 29 April 1974 [17 April 1973] 46220/74 Divided out of 1466269 Heading H1K [Also in Division G1] A semi-conductor device suitable for use as a liquid level senser comprises a sealed metal can 3, a thermally-sensitive resistance element formed by a piece of semi-conductor material 4, e.g. silicon or germanium, in the can, the material being mounted, e.g. by solder, in electrical and thermal contact with the can wall to allow heat exchange between the element and any liquid around the can, a seal 7, e.g. of glass, sealing the can, and leads 5, 6 projecting through the seal and connected respectively with the element 4 via a strip of spring metal 8 and with the wall of the can 3, the walls of the can having a low thermal conductance so that cooling of the thermistor 4 via the side walls of the can is insignificant compared with that via the end wall of the can when the can is immersed in liquid.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB4622074A GB1466270A (en) | 1974-04-29 | 1974-04-29 | Semiconductor devices |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB4622074A GB1466270A (en) | 1974-04-29 | 1974-04-29 | Semiconductor devices |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1466270A true GB1466270A (en) | 1977-03-02 |
Family
ID=10440354
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB4622074A Expired GB1466270A (en) | 1974-04-29 | 1974-04-29 | Semiconductor devices |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB1466270A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7181965B2 (en) | 2004-12-20 | 2007-02-27 | International Business Machines Corporation | Self-heated liquid level sensor |
-
1974
- 1974-04-29 GB GB4622074A patent/GB1466270A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7181965B2 (en) | 2004-12-20 | 2007-02-27 | International Business Machines Corporation | Self-heated liquid level sensor |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PCNP | Patent ceased through non-payment of renewal fee |