GB1466270A - Semiconductor devices - Google Patents

Semiconductor devices

Info

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
Application number
GB4622074A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Philips Components Ltd
Original Assignee
Mullard Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mullard Ltd filed Critical Mullard Ltd
Priority to GB4622074A priority Critical patent/GB1466270A/en
Publication of GB1466270A publication Critical patent/GB1466270A/en
Expired legal-status Critical Current

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.
GB4622074A 1974-04-29 1974-04-29 Semiconductor devices Expired GB1466270A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (1)

* Cited by examiner, † Cited by third party
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