US3662262A - Mercury coulometer having an electrode spacer - Google Patents

Mercury coulometer having an electrode spacer Download PDF

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Publication number
US3662262A
US3662262A US82261A US3662262DA US3662262A US 3662262 A US3662262 A US 3662262A US 82261 A US82261 A US 82261A US 3662262D A US3662262D A US 3662262DA US 3662262 A US3662262 A US 3662262A
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US
United States
Prior art keywords
mercury
spacing member
electrolyte
coulometer
bore
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 - Lifetime
Application number
US82261A
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English (en)
Inventor
Hiroshi Shimizu
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.)
Terumo Ceramics Co Ltd
Original Assignee
Terumo Ceramics Co 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 Terumo Ceramics Co Ltd filed Critical Terumo Ceramics Co Ltd
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Publication of US3662262A publication Critical patent/US3662262A/en
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R22/00—Arrangements for measuring time integral of electric power or current, e.g. electricity meters
    • G01R22/02—Arrangements for measuring time integral of electric power or current, e.g. electricity meters by electrolytic methods

Definitions

  • the inner diameter of the bore is [58] Field of Search ..324/94, 182 from 0,1 to 2 mm and the spacing member has a dimension of about 80 90 percent of the inner diameter of the bore in the [56] References Cited direction of the diameter of the bore.
  • FIG. 1 UNITED STATES PATENTS 10 Claims, 2 Drawing Figures 3,045,178 7/1962 Corrsin ..324/l82 FIG. 1
  • the present invention relates to improvements in a mercury coulometer, and more particularly to improved means for preventing malfunctions due to large shocks.
  • a conventional mercury coulometer constructed as illustrated in FIG. 1 has the following drawbacks.
  • numeral 1 represents a capillary tube, in which there are sealed a pair of spatially disposed mercury columns 3 with an electrolyte 2 interposed therebetween. From the outer ends of the mercury columns 3 are drawn out a pair of electrodes 4.
  • Numeral 5 denotes a sealing member for sealing the capillary tube 1.
  • mercury generally has a characteristic whereby it is readily disintegrated by mechanical shocks. Moreover, the mercury has a specific gravity considerably greater than that of the electrolyte used in the coulometer. If the instrument is subjected to shocks, disintegrated parts of the mercury will be carried into the electrolyte, to disperse it, making it impossible to determine the amounts of electrical charge introduced.
  • the mercury coulometer of the present invention has a spacing member disposed in the electrolyte between a pair of spatially positioned mercury columns.
  • the spacing member has a dimension of about 80-90 percent of the inner diameter of the bore of the coulometer in the direction of the diameter of the bore.
  • FIG. 1 is a sectional view of the conventional mercury coulometer
  • FIG. 2 is a sectional view of a mercury coulometer according to an embodiment of the present invention.
  • numeral 11 represents a capillary tube, in which there are sealed a pair of spatially set mercury columns 13 with an electrolyte interposed therebetween which consists of mercuric iodide, potassium iodide and demineralized water.
  • the capillary tube 11 is preferably 0.1 to 2.0 mm in inner diameter and to 50 mm long. Further in the electrolyte is placed a spherical spacing member 14 having a diameter approximating 80 to 90 percent of the inner diameter of the capillary tube 11.
  • the spacing member 14 When the coulometer is subjected to shocks, the spacing member 14 contacts either or both inner ends of the paired mercury columns 13 so as to prevent said mercury columns from being broken in pieces. If, the spacing member 14 has too small a volume, it will undesirably fail to realize the aforesaid effect.
  • the spacing member 14 need not assume a spherical form as described above, but may be prepared in any other form, for
  • the spacing member is preferred to have a such a specific gravity as allows it to travel easily through the capillary tube together with the electrolyte and to be made of, for example, plastics material which is not chemically affected by the electrolyte. To make the flow of the electrolyte easily visible, it is desired that the spacing member be suitably colored.
  • Electrodes 15 preferably consist of nickel or stainless steel wire.
  • Numeral l6 denotes a member for sealing the capillary tube 11.
  • insulating plastics material such as epoxy resin.
  • the direct current used in the present invention has its density limited to less than about 10 mA/mm". In the case of half wave rectification, however, this current density is limited to about 50 mA/mm max.
  • a mercury coulometer comprising a capillary member having a longitudinal bore of 0.1 to 2 mm in inner diameter
  • a spacing member disposed in the electrolyte between the mercury columns to prevent them from being brought into mutual contact, said spacing member having a dimension of approximately to percent of said diameter of said bore in the direction of said diameter;

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Investigating Or Analysing Biological Materials (AREA)
  • Measuring Oxygen Concentration In Cells (AREA)
  • Prostheses (AREA)
  • Electron Tubes For Measurement (AREA)
  • Measurement Of Unknown Time Intervals (AREA)
US82261A 1969-11-13 1970-10-20 Mercury coulometer having an electrode spacer Expired - Lifetime US3662262A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1969107165U JPS4922228Y1 (2) 1969-11-13 1969-11-13

Publications (1)

Publication Number Publication Date
US3662262A true US3662262A (en) 1972-05-09

Family

ID=14452121

Family Applications (1)

Application Number Title Priority Date Filing Date
US82261A Expired - Lifetime US3662262A (en) 1969-11-13 1970-10-20 Mercury coulometer having an electrode spacer

Country Status (8)

Country Link
US (1) US3662262A (2)
JP (1) JPS4922228Y1 (2)
AT (1) AT305427B (2)
CH (1) CH519174A (2)
DE (1) DE2052241C3 (2)
FR (1) FR2067274B1 (2)
GB (1) GB1318730A (2)
NL (1) NL7016606A (2)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6174998A (ja) * 1984-09-19 1986-04-17 株式会社　テイエルブイ スチ−ムトラツプの運転時間積算計

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3045178A (en) * 1958-09-15 1962-07-17 United Nuclear Corp Operating time indicator
GB1070913A (en) * 1965-02-17 1967-06-07 Ind Instr Ltd Improvements relating to elapsed time in dicators comprising electro chemical cells

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3045178A (en) * 1958-09-15 1962-07-17 United Nuclear Corp Operating time indicator
GB1070913A (en) * 1965-02-17 1967-06-07 Ind Instr Ltd Improvements relating to elapsed time in dicators comprising electro chemical cells

Also Published As

Publication number Publication date
NL7016606A (2) 1971-05-17
GB1318730A (en) 1973-05-31
FR2067274B1 (2) 1973-02-02
CH519174A (de) 1972-02-15
DE2052241C3 (de) 1973-12-06
DE2052241A1 (de) 1971-05-27
JPS4922228Y1 (2) 1974-06-14
AT305427B (de) 1973-02-26
FR2067274A1 (2) 1971-08-20
DE2052241B2 (de) 1973-05-17

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