GB222687A - An improved receiving apparatus for wireless telegraphy - Google Patents

An improved receiving apparatus for wireless telegraphy

Info

Publication number
GB222687A
GB222687A GB2619923A GB2619923A GB222687A GB 222687 A GB222687 A GB 222687A GB 2619923 A GB2619923 A GB 2619923A GB 2619923 A GB2619923 A GB 2619923A GB 222687 A GB222687 A GB 222687A
Authority
GB
United Kingdom
Prior art keywords
telephones
coil
shows
plate
earpiece
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
GB2619923A
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.)
LIONEL JOHN GOLDHILL
Original Assignee
LIONEL JOHN GOLDHILL
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 LIONEL JOHN GOLDHILL filed Critical LIONEL JOHN GOLDHILL
Priority to GB2619923A priority Critical patent/GB222687A/en
Publication of GB222687A publication Critical patent/GB222687A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/06—Receivers
    • H04B1/16—Circuits
    • H04B1/22—Circuits for receivers in which no local oscillation is generated

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Telephone Set Structure (AREA)

Abstract

222,687. Linden, L. P., and Goldhill, L. J. Oct. 20, 1923. No Patent granted (Sealing fee not paid). Receiving sets, construction of. - A self-contained set for mounting on a telephone earpiece comprises a crystal detector b, x, mounted in an insulating body j formed with an external groove in which is wound the inductance. The latter comprises two coils c, d, the coil c being tapped to studs m co-operating with a wiper q carried by a rotatable member p. A rotatable ring y carries in the form of a semi-cylindrical metal foil lining. one plate of a variable condenser. The fixed plate is mounted outside the coil c and the plates are separated by a mica cylinder. Contact with the movable plate is provided by a metal ring 5. The apparatus is mounted on the earpiece by means of metal pillars h, i which also providethe necessary connections. Fig. 1 shows the electrical connections. Fig. 5 shows a method of connecting an additional pair of telephones in series. The terminals 10, 11 are normally strapped together the strap being replaced when. desired by another pair of telephones.
GB2619923A 1923-10-20 1923-10-20 An improved receiving apparatus for wireless telegraphy Expired GB222687A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2619923A GB222687A (en) 1923-10-20 1923-10-20 An improved receiving apparatus for wireless telegraphy

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2619923A GB222687A (en) 1923-10-20 1923-10-20 An improved receiving apparatus for wireless telegraphy

Publications (1)

Publication Number Publication Date
GB222687A true GB222687A (en) 1924-10-09

Family

ID=10239902

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2619923A Expired GB222687A (en) 1923-10-20 1923-10-20 An improved receiving apparatus for wireless telegraphy

Country Status (1)

Country Link
GB (1) GB222687A (en)

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