GB628312A - Improvements in or relating to frequency measurement - Google Patents

Improvements in or relating to frequency measurement

Info

Publication number
GB628312A
GB628312A GB20348/48A GB2034848A GB628312A GB 628312 A GB628312 A GB 628312A GB 20348/48 A GB20348/48 A GB 20348/48A GB 2034848 A GB2034848 A GB 2034848A GB 628312 A GB628312 A GB 628312A
Authority
GB
United Kingdom
Prior art keywords
frequency
frequencies
signal
relating
fixed frequencies
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
GB20348/48A
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.)
Philco Radio and Television Corp
Original Assignee
Philco Radio and Television Corp
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 Philco Radio and Television Corp filed Critical Philco Radio and Television Corp
Publication of GB628312A publication Critical patent/GB628312A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R23/00—Arrangements for measuring frequencies; Arrangements for analysing frequency spectra

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Radar Systems Or Details Thereof (AREA)

Abstract

628,312. Frequency measurements. PHILCO RADIO & TELEVISION CORPORATION. May 30, 1945, No. 20348/48. Convention date, May 30, 1944. Divided out of 628,245. Drawings to Specification. [Class 37] To indicate successive frequency coincidences between a signal of varying frequency and a plurality of signals of different fixed frequencies, e.g. for calibrating a variable oscillator, both the variable and the fixed frequencies are heterodyned to produce beat frequencies and the two beat frequencies compared to indicate when they are identical, i.e. when the signal of varying frequency has the same frequency as one of the fixed frequencies. The description is substantially the same as that of Specification 628,245. Specification 628,246, [Group XIX], also is referred to.
GB20348/48A 1944-05-30 1945-05-30 Improvements in or relating to frequency measurement Expired GB628312A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US628312XA 1944-05-30 1944-05-30

Publications (1)

Publication Number Publication Date
GB628312A true GB628312A (en) 1949-08-25

Family

ID=22045107

Family Applications (1)

Application Number Title Priority Date Filing Date
GB20348/48A Expired GB628312A (en) 1944-05-30 1945-05-30 Improvements in or relating to frequency measurement

Country Status (1)

Country Link
GB (1) GB628312A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2972108A (en) * 1959-03-17 1961-02-14 Jr Robert R Stone Frequency measuring system employing frequency comparison

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2972108A (en) * 1959-03-17 1961-02-14 Jr Robert R Stone Frequency measuring system employing frequency comparison

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