GB259048A - Improvements in and relating to the measurement of high electrical resistance and/orthe capacity of condensers, or other values which are functions of resistance or capacity - Google Patents

Improvements in and relating to the measurement of high electrical resistance and/orthe capacity of condensers, or other values which are functions of resistance or capacity

Info

Publication number
GB259048A
GB259048A GB2735825A GB2735825A GB259048A GB 259048 A GB259048 A GB 259048A GB 2735825 A GB2735825 A GB 2735825A GB 2735825 A GB2735825 A GB 2735825A GB 259048 A GB259048 A GB 259048A
Authority
GB
United Kingdom
Prior art keywords
resistance
capacity
condenser
tube
vacuum tube
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
GB2735825A
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.)
JOHN DRUMMOND INGLIS
Original Assignee
JOHN DRUMMOND INGLIS
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 JOHN DRUMMOND INGLIS filed Critical JOHN DRUMMOND INGLIS
Priority to GB2735825A priority Critical patent/GB259048A/en
Publication of GB259048A publication Critical patent/GB259048A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
    • G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
    • G01R27/025—Measuring very high resistances, e.g. isolation resistances, i.e. megohm-meters

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Radiation (AREA)
  • Other Investigation Or Analysis Of Materials By Electrical Means (AREA)

Abstract

259,048. Inglis, J. D. Oct. 31, 1925. Actinometers.-An instrument for measuring ionization strengths comprises a two-electrode vacuum tube containing neon or other rarified gas in series with a high resistance and with a condenser in parallel either with the vacuum tube or with the resistance. On connection to a constant voltage supply, the condenser is periodically charged and discharged between definite potentials, a flash occurring in the vacuum tube at the commencement of each cycle. The period of the flashing affords data for the determination of the value of the resistance or the capacity. In the construction shown, the neon tube T is connected in series with a source a and, by means of a two-way switch s, with either a known resistance A or a resistance E to be measured. By means of a two-way switch P, a condenser B of known capacity or a condenser D the capacity of which is to be measured is connected in parallel with the resistance. A or E. The value of the resistance E is obtained by comparing the rate of flashing with the switch S on the contacts b, d respectively. For measuring ionization strengths of R÷ntgen rays or other emanations, a discharge chamber having two electrodes and filled with rarefied helium is substituted for the unknown resistance E, the frequency of flashing being measured with rays of known ionizing strength and with the rays under examination. To prevent changes in the period of flash due to change in ionization, the tube T is preferably enclosed in a box with a small observation aperture, in which box is also included a lamp or vacuum tube 0 to provide a constant ionizing effect, which reduces the starting voltage of the tube T and thus minimizes the effect of minor fluctuations in the supply voltage. Specifications 177,808 and 221,338, [Class 37, Electricity, Measuring &c.], are referred to.
GB2735825A 1925-10-31 1925-10-31 Improvements in and relating to the measurement of high electrical resistance and/orthe capacity of condensers, or other values which are functions of resistance or capacity Expired GB259048A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2735825A GB259048A (en) 1925-10-31 1925-10-31 Improvements in and relating to the measurement of high electrical resistance and/orthe capacity of condensers, or other values which are functions of resistance or capacity

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2735825A GB259048A (en) 1925-10-31 1925-10-31 Improvements in and relating to the measurement of high electrical resistance and/orthe capacity of condensers, or other values which are functions of resistance or capacity

Publications (1)

Publication Number Publication Date
GB259048A true GB259048A (en) 1926-10-07

Family

ID=10258305

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2735825A Expired GB259048A (en) 1925-10-31 1925-10-31 Improvements in and relating to the measurement of high electrical resistance and/orthe capacity of condensers, or other values which are functions of resistance or capacity

Country Status (1)

Country Link
GB (1) GB259048A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2504848A (en) * 1945-11-16 1950-04-18 Bendix Aviat Corp Resistance measuring apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2504848A (en) * 1945-11-16 1950-04-18 Bendix Aviat Corp Resistance measuring apparatus

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