US2579523A - Telegraph relay - Google Patents

Telegraph relay Download PDF

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Publication number
US2579523A
US2579523A US7911A US791148A US2579523A US 2579523 A US2579523 A US 2579523A US 7911 A US7911 A US 7911A US 791148 A US791148 A US 791148A US 2579523 A US2579523 A US 2579523A
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US
United States
Prior art keywords
contacts
relay
armature
tongue
spider
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
US7911A
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English (en)
Inventor
Terry Victor John
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.)
International Standard Electric Corp
Original Assignee
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 US2579523A publication Critical patent/US2579523A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/54—Contact arrangements

Definitions

  • This invention relates to electro-magnetic telegraph relays of the type in which the tongue of the relay carries two contacts which move between two fixed contacts according to the movements of the armature of the relay and is particularly concerned with means for mounting the contacts.
  • the objects of the invention are t provide a relay in which chattering of the contacts against one another is reduced or eliminated and in which the change-over time can be made vanishingly small.
  • an armature of magnetised material is pivoted or held at one end in such a way that it can move between the two poles of an electro-magnet under the influence of signalling current passed through the windings of the electro-magnet, commonly known as the relay windings.
  • the relay windings From the free end of the armature there is extended in line with the armature a strip (or strips) of metal known as the tongue and near the free end of the tongue two contacts are mounted, one on each side of the tongue and opposite one another, the contacts being so positioned that they lie between two fixed contacts carried on supports attached to the main frame of the relay.
  • the contacts which move when the armature moves will be referred to as the moving contacts while the contacts which are supported on the frame of the relay will be referred to as the operating fixed contacts. It is normal in using such relays to connect the positive pole of a signalling battery to one fixed contact and the ne ative pole of the same battery to the other fixed contact.
  • the tongue of the relay is connected to the line or apparatus into which the signals are to be relayed, the circuit being completed by a connection to the midpoint of the signalling battery.
  • the purpose of the relay is to transmit square shaped signals corresponding to the signalling currents passing through the relay windings and with as nearly as possible the same time spacing as the original signals.
  • the invention provides an electro-magnetic relay comprising an armature on which are mounted two contacts, said contacts being so positioned that they co-operate with two other contacts mounted on the static frame-work of the relay when the armature moves under the influence of signalling currents in the relay windings, characterised in this, that at least one pair of similarly acting contacts is mounted on a rigid support in such manner, that the two contacts of said pair are held a constant distance apart, said rigid support being carried in a resilient mounting so that any movement of one contact of said pair is accompanied by an equivalent movement of the other contact of said pair.
  • Fig. 2 shows an alternative embodiment of the invention
  • Fig. 3 shows yet another embodiment of the invention.
  • Fig. 1 there is shown a member l carrying two contacts 2, amounted on a cylindrical extension l of a relay tongue 5.
  • the tongue 5 is an extension of the free end of the magnetic armature of the relay, the tongue and armature being of any suitable construction. Under the influence of signalling currents in the relay windings the armature (not shown) and with it the tongue 5 moves to the right or left (as shown in the figure) as indicated by the arrows 6.
  • the two contacts 2, 3 project in opposite senses from the arms of the spider and constitute the moving contacts of the relay, co-operating with two fixed contacts 9, l9 adjustably mounted on the fixed framework of the relay.
  • An electrical connection to the moving contacts is provided by-means of a flexible connection H.
  • contact pieces of the usual type are mounted on the armsof the spider, one near the end of each arm, and so positioned that they project from the arms along lines which are parallel to the direction of travel of the tongue of the relay.
  • the tongue of the relay is in a neutral position with no current flowing through the relay windings.
  • the fixed contacts may be adjusted so that there are only very small gaps betveen them and the moving contacts. If, now, a signalling current is passed through the relay winding, the armature and tongue will travel to one side and one of the moving contacts will press against its associated fixed contact and the spider will be rotated around the tongue through some small angle.
  • the resilient bush yields sufiiciently to minimise the tendency. of the contacts to chattenandcwing to the nature of'the material of the bush, a certain amount of damping is introduced by the natural internal friction of the material.
  • the spider is not necessarily formed as a straight cross-arm but may be so shaped that the faces of the two moving contactsand, the axis of rotation of they spider lie inone plane.
  • the spider could carry the fixed contacts and be resiliently mounted on the frame of the relay, the moving contacts being carried on a light cross-arm rigidly fixed to the relay tongue.
  • Another arrangement for carrying out the invention would be to mount the spider on the tongue of the relay employin a resilient bush, in such a way, that the axis of rotation of the spider was parallel to the axis of rotation of the relay armature.
  • the two moving contacts would then be at different distances from the axis of rotation of the armature so the contact pressure on the two contacts would be different for equal signal current strengths in the relay windings. This could readily be compensated for by making the arms of the spider of unequal length.
  • FIG. 2 Yet another embodiment of the invention is shown in Fig. 2.
  • a part of a relay tongue l2 which moves with the armature under the influence of the signalling currents along the lines indicated by the arrows 13.
  • the tongue carries at its free end a flexible extension in the form of a blade 14.
  • a spider l 5 is firmly mounted on the free end of the blade l4 and carries two contact pieces [6, ll. These contact pieces co-operate with two adjustably mounted fixed contacts. It can be seen that this arrangement differs from that shown in Fig. 1 only in that the resilient bush has been replaced by the flexible blade M.
  • the quick make and quick break and make-before-break facilities described above are obtainable in just the same way as with the embodiment described with reference to Fig. 1.
  • FIG. 3 A still further embodiment of the invention is shown in Fig. 3. This requires a somewhat different mechanical construction although the contact 23 while the other moving contact is with-' drawn from the other fixed contact 24.
  • the resilience is supplied by the springs 28 restraining the movement of the fixed contacts and if frictional damping is necessary it can be provided by means of leaf springs (not shown) resting on the arms 25.
  • An electro-magnetic relay comprising a frame member, an armature having an extension portion, a resilient bush of organic material firmly attached to said portion, a rigid cross-piece provided with an aperture through which said resilient bush is passed, the inner surface of the aperture of said cross piece being firmly attached to the outer portion of said bush, said cross-piece being mounted at right angles to the plane in which said armature moves, a first pair of contacts attached to said cross-piece near the ends thereof, said contacts projecting in opposite sense along lines parallel to the line along which said armature moves, a second pair of contacts mounted on said member, said last named contacts positioned to co-operate with said first named contacts.
  • An electro-magnetic relay comprising an armature adapted to move bi-directionally in response to received signalling currents, a rigid mounting member, means for resiliently attaching said mounting member to said armature, a first pair of stationary, opposed contacts, a sec ond pair of opposed contacts, each attached to opposite sides of said mounting member in a plane parallel to the direction of movement of said armature and spaced on opposite sides of the plane of movement of said armature, one of the contacts of said second pair adapted to cooperate with one of the contacts of said first pair when said armature moves in one direction and the other of the contacts of said second pair adapted to cooperate with the other of the contacts of said first pair when said armature moves in the other direction, said mounting member adapted after aamazsaa closures of corresponding ofthe contacts of said pairs to move in one angular direction-and to;
  • said resilient means comprises an extension portion of said armature, said portion in; the. form of a. thin, flexible and resilient blade, said mounting member attached to, said portion at, the end of said blade distant from the pointof attachmentv to said armature.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Breakers (AREA)
  • Electromagnets (AREA)
US7911A 1947-01-24 1948-02-12 Telegraph relay Expired - Lifetime US2579523A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB280331X 1947-01-24

Publications (1)

Publication Number Publication Date
US2579523A true US2579523A (en) 1951-12-25

Family

ID=10269168

Family Applications (1)

Application Number Title Priority Date Filing Date
US7911A Expired - Lifetime US2579523A (en) 1947-01-24 1948-02-12 Telegraph relay

Country Status (6)

Country Link
US (1) US2579523A (fr)
BE (1) BE479789A (fr)
CH (1) CH280331A (fr)
FR (1) FR962481A (fr)
GB (1) GB620633A (fr)
NL (1) NL70317C (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2727107A (en) * 1950-08-09 1955-12-13 Hubbell Harvey Toggle switch swing arm
US2842636A (en) * 1955-09-08 1958-07-08 Robert E Foster Nonsynchronous vibrator
US2997553A (en) * 1961-08-22 Ignition contact set
US3033947A (en) * 1958-12-30 1962-05-08 Holley Carburetor Co Ignition contact set
US3171005A (en) * 1963-02-25 1965-02-23 Harold G Abbey Self-aligning electrical contact shoes for movable carriers
US3202781A (en) * 1960-12-20 1965-08-24 Merlin Gerin Stationary contact structure for electrical circuit breakers
US3267243A (en) * 1965-01-27 1966-08-16 Mallory & Co Inc P R Breaker arm assembly for a contact set

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US255378A (en) * 1882-03-21 Protector for telegraphic instruments
US544351A (en) * 1895-08-13 Relay
US781416A (en) * 1904-03-30 1905-01-31 Willis D Gregory Electric telegraph.
US1279168A (en) * 1915-01-26 1918-09-17 Otis Elevator Co Electromagnetic switch mechanism.
US2082493A (en) * 1933-05-24 1937-06-01 Hartman Electric Mfg Company Stationary contact system for vibratory switches
US2445401A (en) * 1944-05-26 1948-07-20 Mallory & Co Inc P R Vibrator
US2455049A (en) * 1948-11-30 Shockpkoof electromagnetic

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US255378A (en) * 1882-03-21 Protector for telegraphic instruments
US544351A (en) * 1895-08-13 Relay
US2455049A (en) * 1948-11-30 Shockpkoof electromagnetic
US781416A (en) * 1904-03-30 1905-01-31 Willis D Gregory Electric telegraph.
US1279168A (en) * 1915-01-26 1918-09-17 Otis Elevator Co Electromagnetic switch mechanism.
US2082493A (en) * 1933-05-24 1937-06-01 Hartman Electric Mfg Company Stationary contact system for vibratory switches
US2445401A (en) * 1944-05-26 1948-07-20 Mallory & Co Inc P R Vibrator

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2997553A (en) * 1961-08-22 Ignition contact set
US2727107A (en) * 1950-08-09 1955-12-13 Hubbell Harvey Toggle switch swing arm
US2842636A (en) * 1955-09-08 1958-07-08 Robert E Foster Nonsynchronous vibrator
US3033947A (en) * 1958-12-30 1962-05-08 Holley Carburetor Co Ignition contact set
US3202781A (en) * 1960-12-20 1965-08-24 Merlin Gerin Stationary contact structure for electrical circuit breakers
US3171005A (en) * 1963-02-25 1965-02-23 Harold G Abbey Self-aligning electrical contact shoes for movable carriers
US3267243A (en) * 1965-01-27 1966-08-16 Mallory & Co Inc P R Breaker arm assembly for a contact set

Also Published As

Publication number Publication date
FR962481A (fr) 1950-06-10
BE479789A (fr)
NL70317C (fr)
GB620633A (en) 1949-03-28
CH280331A (de) 1952-01-15

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