GB450974A - Improvements in or relating to ringers adapted for use in telephone sets - Google Patents

Improvements in or relating to ringers adapted for use in telephone sets

Info

Publication number
GB450974A
GB450974A GB253335A GB253335A GB450974A GB 450974 A GB450974 A GB 450974A GB 253335 A GB253335 A GB 253335A GB 253335 A GB253335 A GB 253335A GB 450974 A GB450974 A GB 450974A
Authority
GB
United Kingdom
Prior art keywords
ringer
windings
telephone sets
ringers
relating
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
GB253335A
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.)
JAMES SAMUEL PATERSON ROBERTSO
STC PLC
Original Assignee
JAMES SAMUEL PATERSON ROBERTSO
Standard Telephone and Cables PLC
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 JAMES SAMUEL PATERSON ROBERTSO, Standard Telephone and Cables PLC filed Critical JAMES SAMUEL PATERSON ROBERTSO
Priority to GB253335A priority Critical patent/GB450974A/en
Publication of GB450974A publication Critical patent/GB450974A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K1/00—Devices in which sound is produced by striking a resonating body, e.g. bells, chimes or gongs
    • G10K1/06—Devices in which sound is produced by striking a resonating body, e.g. bells, chimes or gongs the resonating devices having the shape of a bell, plate, rod, or tube
    • G10K1/062—Devices in which sound is produced by striking a resonating body, e.g. bells, chimes or gongs the resonating devices having the shape of a bell, plate, rod, or tube electrically operated

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Magnetic Treatment Devices (AREA)

Abstract

450,974. Transformers. STANDARD TELEPHONES & CABLES, Ltd., ROBERTSON, J. S. P., and GRACE, B. B., 63, Aldwych, London. Jan. 25, 1935, No. 2533. [Class 38 (ii)] [See also Group XXXVIII] In a combined induction coil and ringer for use in telephone sets and bellboxes the armature 14 carrying the clapper 16 is a permanent magnet pivoted centrally at 12 between two polepieces which are oppositely magnetized by the ringer windings 2. The windings 3 of the induction coil and the ringer windings 2 are on opposite limbs of a #-shaped magnet 1, each polepiece 8 comprises two like poles 9, 10 co-operating with the opposite ends of the armature.
GB253335A 1935-01-25 1935-01-25 Improvements in or relating to ringers adapted for use in telephone sets Expired GB450974A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB253335A GB450974A (en) 1935-01-25 1935-01-25 Improvements in or relating to ringers adapted for use in telephone sets

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB253335A GB450974A (en) 1935-01-25 1935-01-25 Improvements in or relating to ringers adapted for use in telephone sets

Publications (1)

Publication Number Publication Date
GB450974A true GB450974A (en) 1936-07-27

Family

ID=9741238

Family Applications (1)

Application Number Title Priority Date Filing Date
GB253335A Expired GB450974A (en) 1935-01-25 1935-01-25 Improvements in or relating to ringers adapted for use in telephone sets

Country Status (1)

Country Link
GB (1) GB450974A (en)

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