US3346858A - Telephone ringer - Google Patents

Telephone ringer Download PDF

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Publication number
US3346858A
US3346858A US456702A US45670265A US3346858A US 3346858 A US3346858 A US 3346858A US 456702 A US456702 A US 456702A US 45670265 A US45670265 A US 45670265A US 3346858 A US3346858 A US 3346858A
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US
United States
Prior art keywords
armature
core
coil
hammer
end portions
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
US456702A
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English (en)
Inventor
Roberton James Samuel Paterson
Dymoke-Bradshaw Leslie E Basil
Lotay Nirmal Singh
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International Standard Electric Corp
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International Standard Electric 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 International Standard Electric Corp filed Critical International Standard Electric Corp
Application granted granted Critical
Publication of US3346858A publication Critical patent/US3346858A/en
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Expired - Lifetime legal-status Critical Current

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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
    • G10K1/063—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 the sounding member being a bell
    • 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
    • G10K1/063—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 the sounding member being a bell
    • G10K1/064—Operating or striking mechanisms therefor
    • G10K1/0645—Operating or striking mechanisms therefor provided with loudness adjustment

Definitions

  • ABSTRACT OF THE DISCLOSURE A single coil telephone ringer wherein the coil has a permanent magnet core with pole pieces projecting beyond the ends of the coil.
  • a U-shaped armature is pivoted about half way along the length of the coil. The cooperating pole pieces and armature ends are angled to enhance the magnetic moment.
  • the volume of the ring is controlled 'using a formed wheel arrangement for clamping the bell hammer.
  • This invention relates to a polarised magnetic device, such as a ringer, as used in a telephone subscribers instrument.
  • FIG. 1 is a side view of a ringer according to the invention.
  • FIG. 2 is a plan view of the ringer of FIG. 1, the arrow I indicating the direction from which it is seen in FIG. 1.
  • FIG. 3 is a section of the armature pivot of the ringer of FIG. 1.
  • FIG. 4 shows the arrangement of the armature securing spring.
  • FIG. 5 is a side view and a cross-section of an alternative form of volume control wheel.
  • FIG. 6 is an alternative form of ringer frame to that of FIG. 1.
  • the ringer includes a coil-carrying spool 1 on a ferrite magnet 2, polarised to have one longitudinal face a north pole and the other longitudinal face a south pole.
  • the alternating current through the coil therefore sets up magnetic fields which alternately reinforce or diminish the field of the permanent magnet in an opposite manner at each pole.
  • the ringer has one coil only, which simplifies construction.
  • An armature 4 is pivoted at 5, 6 on a platform 7 provided by an upstanding portion of a base plate 8.
  • the pivots may, for example, be ball bearings or rollers held captive in recesses in the armature and the platform, as shown in FIG. 3.
  • each pivot can be a ridge on the inside of the armature which engages with an indentation on the platform or vice versa.
  • domeheaded rivets on the platform or the armature and held captive in recesses on the armature or platform respectively could be used.
  • the pivots are held in place (where they are balls or rollers) and the armature retained in position by a formed clip spring 9 bearing against the outer surface of the armature 4.
  • a central portion of the spring passes through a hole in the armature 4 and is held in a cruciform slot and recess in the platform 7, as shown in FIG. 4.
  • the slot is larger in the longitudinal than in the vertical sense.
  • the spring is mounted by pushing its right hand end (FIG. 4) through the longer slot and then turning it through so that it reaches the position shown in FIG. 4. This, with the cutaway portions in the thickness of the portion 7 ensures that the spring positively retains the armature; hence it will not wobble as wear occurs in use.
  • the core 11 When the coil is energised by an alternating current, the core 11 is magnetised, and its magnetisation direction is reversed on every half cycle.
  • the armature whose ends thus alternate in polarity between north and south polarisation co-operates with the steady polarity flux from the permanent magnet, such that the armature rocks about its pivot, the rocking occurring in a plane perpendicular to the axis through the pivots.
  • the flux of the permanent magnet tends to bias the armature by acting to polarize the armature.
  • the magnetic bias causes the armature to react faster to the alternating current generated flux.
  • the end portions 10, 11 (FIG.
  • a hammer 12 is carried by the armature, and when the armature rocks, the hammer strikes two gongs (not shown), one on each side of the hammer head.
  • the volume of sound emitted by the bell can be controlled by a wheel 13 mounted beneath the hammer so that the arm of the hammer floats in a channel around the circumference of the wheel.
  • This channel has a variable width, as shown in FIG. 2, and rotation of the wheel causes the walls of the channel to converge or diverge from the arm, controlling the distance the arm of the hammer can move sideways, and hence the force with which it hits the gongs.
  • the arm of the hammer is, of course, flexible.
  • volume control wheel is shown in FIG. 5.
  • This wheel is an eccentric and its circumferential channel is lined with a damping material such as a foam rubber or plastics material. Rotation of the wheel when mounted beneath the arm of the hammer causes the foam rubber lining mentioned above to bear on the arm. This exerts a damping action on the arm, lessening the force with which the head of the hammer strikes the gongs.
  • a damping material such as a foam rubber or plastics material.
  • FIG. 1 the volume control wheel is shown axially supported between two bent-up portions of the base plate.
  • FIG. 6 Another method of supporting the wheel is shown in FIG. 6, where a composite moulding provides an axial support.
  • the plastics wheel with an integral axle is pressed into the cylindrical bearings.
  • the walls of the bearings move apart allowing entry and finally snap inwards, partially embracing and securing the axle.
  • This method of Patented Oct. 10, 1967 insertion of the axle is shown in the inset to FIG. 6'.
  • an upward force is exerted on the axle which tends to push it out of its bearings.
  • the axle remains secured, however, as the moulding is screwed firmly to the base plate, thus preventing the walls from flexing outwards.
  • the spool unit is secured to its base plate by two screws 14 (FIG. 2) which enter slots 15 at the sides of the spool checks and engage in two threaded holes in the base plate. Adjustment of the airgaps is made by slackening off these screws and sliding the spool together with the magnet and core towards or away from the armature. Slots are also provided on the spool unit in the alternative construction of FIG. 6, as indicated at 15'.
  • a polarized magnetic ringing device having at least one gong, said device comprising a magnetizable core surrounded by an energizing coil, end portions of said core projecting out of said coil to form pole pieces, an armature of generally U-shaped construction with the base portion of the U-shape normally parallel to said core, said armature being rockable about a pivotal axis located between the ends of said base portion, end portions of the legs of said U-shaped armature cooperatively associated with the pole pieces, arm and hammer means attached to said armature in a position normal to the length of said core and juxtaposed with said hammer to said gong, permanent magnet means for imparting magnetization of the same sense to the faces of each of the pole pieces, so that energization of the coil with alternating current causes the said armature to rock about the pivotal axis, and the end portions of the armature and the faces of the pole pieces being parallel to each other and at an obtuse angle to the length of the core.
  • a device as claimed in claim 2, and in which said pivotal ax isabout which the armature rocks is defined by a plurality of balls or rollers, each of which is held captive in recesses in said armature and in a support therefor.
  • the ringing device as claimed in claim 5' including means for securing said formed clip spring, said securing means comprising a cruciform slot and recess in the base of said ringing device, abutment means in said armature lying directly over said slot, whereby a central portion of said spring passes through said abutment and is secured in a said cruciform slot and recess.
  • a device as claimed in claim 1 wherein arm means for carrying a hammer are attached to said armature and wherein control means mounted beneath the arm of the hammer comprise rotatable means to adjust the force with which the hammer strikes the gong and hence the volume of the sound emitted.
  • said control means is a wheel having a circumferential channel of varying width in which the arm of the hammer floats, rotation of said wheel causing the walls of the channel to converge on or diverge from the arm, whereby the distance travelled by the arm and hence the force with which the hammer strikes the gong or gongs is controllable.
  • control means is an eccentric wheel having a circumferential channel lined with a damping material such as foam rubber, rotation of said wheel causing the lining to bear on the arm of the hammer, whereby a damping force is applied thereto which reduces the force with which the hammer strikes the gong.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
  • Electromagnets (AREA)
US456702A 1964-06-08 1965-05-18 Telephone ringer Expired - Lifetime US3346858A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB23592/64A GB1019599A (en) 1964-06-08 1964-06-08 Telephone ringer

Publications (1)

Publication Number Publication Date
US3346858A true US3346858A (en) 1967-10-10

Family

ID=10198175

Family Applications (1)

Application Number Title Priority Date Filing Date
US456702A Expired - Lifetime US3346858A (en) 1964-06-08 1965-05-18 Telephone ringer

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US (1) US3346858A (fr)
FR (1) FR1442647A (fr)
GB (1) GB1019599A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2945043A1 (de) * 1979-11-08 1981-05-21 Telefonbau Und Normalzeit Gmbh, 6000 Frankfurt Ankerlagerung fuer wecker

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US787936A (en) * 1903-06-19 1905-04-25 North Electric Co Selective signaling device.
US880940A (en) * 1907-08-15 1908-03-03 Charles Julius Wagner Electric bell.
US2733435A (en) * 1956-01-31 bredehoft
US2782410A (en) * 1953-01-30 1957-02-19 Ericsson Telefon Ab L M Polarized ringing device for use in telephone systems
US2872672A (en) * 1953-06-30 1959-02-03 North Electric Co Telephone ringer and the like
US2890447A (en) * 1956-06-21 1959-06-09 Siemens Ag Electromagnetic drive system for relays, ringers and the like
US2893001A (en) * 1957-11-15 1959-06-30 Bell Telephone Labor Inc Signaling device
US2972139A (en) * 1959-05-21 1961-02-14 Knutson Merritt Back-up warning signal for automotive vehicles
US3076960A (en) * 1961-12-15 1963-02-05 Knutson Merritt Back-up warning signal for automotive vehicles
US3121194A (en) * 1960-03-01 1964-02-11 Automatic Elect Lab Polarized electromagnetic device

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2733435A (en) * 1956-01-31 bredehoft
US787936A (en) * 1903-06-19 1905-04-25 North Electric Co Selective signaling device.
US880940A (en) * 1907-08-15 1908-03-03 Charles Julius Wagner Electric bell.
US2782410A (en) * 1953-01-30 1957-02-19 Ericsson Telefon Ab L M Polarized ringing device for use in telephone systems
US2872672A (en) * 1953-06-30 1959-02-03 North Electric Co Telephone ringer and the like
US2890447A (en) * 1956-06-21 1959-06-09 Siemens Ag Electromagnetic drive system for relays, ringers and the like
US2893001A (en) * 1957-11-15 1959-06-30 Bell Telephone Labor Inc Signaling device
US2972139A (en) * 1959-05-21 1961-02-14 Knutson Merritt Back-up warning signal for automotive vehicles
US3121194A (en) * 1960-03-01 1964-02-11 Automatic Elect Lab Polarized electromagnetic device
US3076960A (en) * 1961-12-15 1963-02-05 Knutson Merritt Back-up warning signal for automotive vehicles

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2945043A1 (de) * 1979-11-08 1981-05-21 Telefonbau Und Normalzeit Gmbh, 6000 Frankfurt Ankerlagerung fuer wecker

Also Published As

Publication number Publication date
FR1442647A (fr) 1966-06-17
GB1019599A (en) 1966-02-09

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