US2182912A - Relay - Google Patents

Relay Download PDF

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Publication number
US2182912A
US2182912A US114447A US11444736A US2182912A US 2182912 A US2182912 A US 2182912A US 114447 A US114447 A US 114447A US 11444736 A US11444736 A US 11444736A US 2182912 A US2182912 A US 2182912A
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US
United States
Prior art keywords
coil
relay
contacts
frame
magnet
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
US114447A
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English (en)
Inventor
Brauer Ernst
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Individual
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Application granted granted Critical
Publication of US2182912A publication Critical patent/US2182912A/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
    • H01H53/00—Relays using the dynamo-electric effect, i.e. relays in which contacts are opened or closed due to relative movement of current-carrying conductor and magnetic field caused by force of interaction between them
    • H01H53/01—Details
    • H01H53/015—Moving coils; Contact-driving arrangements associated therewith

Definitions

  • This invention relates to a dynamic relay.
  • the present invention eliminates these drawbacks by providing a relay comprising a magnet and a movable coil secured to a movable part supported at or near its center of gravity.
  • the movable part need not be disposed in a mechani cally highly sensitive pivot, but may be arranged on leaf springs, whereby at the same time the period of natural vibration is shortened in a very simple manner.
  • I is a permanent steel magnet of the type used in loudspeakers.
  • a coil 2 is provided which is secured to a frame 4, made for instance of aluminum sheet metal, which is partly recessed and covered by an insulating disk II.
  • the frame I is rockingly supported by the leaf springs I! only one of which 88 is shown and which may serve for supplying current to the coil 2, in which case they are insulated and attached to the plate 3 and connected to a plugcontact ID.
  • the insulating disc ll supports leaf springs 4i carrying the contacts 8.
  • the springs ll may be made for instance of thin strips of bronze.
  • the contacts 8 can perform the necessary circuit closmg operations with respect to the fixed contact screwsl. While. the drawing shows only one movable and one fixed contact, several such contacts I, I may be provided side by side in such manner that they can be adjusted from above and are therefore located on the same side of the movable part but on the opposite sides of its fulcrum.
  • the movable member 2, 4, is balanced by the counterweight 8, so that it will not move relative to the relay when the position of the latu terisaltered. llisaleafspringtendingtopress This arrangement is open to the the frame 4 upwardly to the right, the tension of which spring can be varied by means of a screw 5.
  • the construction shown in Fig. 2 aims at rapid contact making.
  • the contacts i2, ll, corresponding to the contacts 6, I of Fig. l, are ar- 30 ranged a great distance from the center of the oscillating motion of frame 4, whilst the coil 2 itself makes only very small motions in the gap of the magnet I.
  • the frame 4 is entirely pressed for instance of insulating hard paper and secured again to the insulating plate 3 by the supporting leaf springs l3. Balancing is effected by the weight I.
  • the conductors 42 for the contacts l2 are guided near the center of oscillation of the frame 4' and then pass as flexible, conductors to 0 the stationary portion of the relay.
  • the spring It like the spring I! in Fig. 1 acts to return frame 4;
  • these relays are further so constructed that the magnet can be separated from the other self-contained structure.
  • Fig. 2 indicates that the magnet can be separated from the system by the loosening of the screws It. This affords the advantage that the magnet can be magnetized separately and the danger of dust, particularly iron filings, entering the gap during the mounting is eliminated.
  • the gap and the whole upper portion of the relay are closed dusttight by a. paper tube 36 shown in Fig. 2 while the cap 41 closes only the upper portion down to the plate 3. In this way the cap is not loaded with the great weight of the magnet which may serve as a convenient handle for manipulating the relay, and the connections, such as the plug pins I0 in Fig. 1, can freely extend outwardly.
  • the invention further provides that the actuating current flows parallel or in series with the coil of an electromagnet 25.
  • is attached to a straight leaf spring 24 and the contact 50 with the countercontact 30 to the bent leaf spring 28 which, owing to initial tension, compresses the rubber buffer 48.
  • the frame 23 is supported by the leaf springs H3.
  • are disposed in the cap or casing 32 covering the entire relay.
  • the conductors of the contacts lead to the plug plate 5!.
  • the armature 26 of the electromagnet 25 is secured to frame 23, and the dimensions are chosen so that at the moment contact is made the distance of the electromagnet from its armature becomes very small.
  • the armature 26 serves also for balancing frame 23.
  • the principal magnet 22 is in this case also an electromagnet which is energized by a separate source of current.
  • mayconstitute the operating coil of the relay, and the coil 22 (Fig. 2) may be connected with the short-circuiting contacts BI, 62 and 60, 63.
  • the same damping action of the frame 4 is attained, as when the operating coil itself is short-circuited by one of these contacts, although in a somewhat lesser egree.
  • the intensity of the current in the short-circuiting conductors can not excessively increase, in case the outer resistance of the circuit comprising the current generator is slight.
  • a balanced damping can of course be attained by the insertion of an outer resistance.
  • Fig. 3 further shows the retarding device for retarding in an adjustable manner the making and breaking of contract. It is known to employ as brake for the movable parts of a relay an air piston which tightly moves in an airtight cylinder.
  • the form of relay shown does not require a special piston and air cylinder, the body of the coil 2 being simply closed on top, for instance by a paper sheet 33.
  • the core of the magnet then acts as stationary piston and the body of the coil as a movable cylinder.
  • To regulate the retardation air is admitted through the bores 3'! and 40 which can be closed more or less by the screw 35.
  • a dynamic relay comprising a casing, a magnet having between its poles an annular gap, a coil extending into said gap, a frame outside of said magnet supporting said coil and forming together therewith a movable member, resilient means supporting said movable member, cooperating contacts on said frame and said casing, and means for so balancing said frame that its position relative to the contacts on the casing is varied only upon said coil being acted upon by electromagnetic forces, but is not varied by mechanical'forces acting on said casing.
  • an electromagnetic coil on said iron core being electrically connected with said first-mentioned coil and receiving the operating current.
  • a dynamic relay comprising a casing, a magnet having between its poles an annular gap, a coil extending into said gap, 'a frame outside saidmagnet supporting said coil and forming together therewith a movable member, a leaf spring supporting said movable member, coop-- ERNST BRAIJER.

Landscapes

  • Electromagnets (AREA)
  • Buffer Packaging (AREA)
  • Reciprocating, Oscillating Or Vibrating Motors (AREA)
US114447A 1935-12-09 1936-12-05 Relay Expired - Lifetime US2182912A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE484731X 1935-12-09

Publications (1)

Publication Number Publication Date
US2182912A true US2182912A (en) 1939-12-12

Family

ID=6543169

Family Applications (1)

Application Number Title Priority Date Filing Date
US114447A Expired - Lifetime US2182912A (en) 1935-12-09 1936-12-05 Relay

Country Status (3)

Country Link
US (1) US2182912A (fr)
FR (1) FR814421A (fr)
GB (1) GB484731A (fr)

Also Published As

Publication number Publication date
GB484731A (en) 1938-05-10
FR814421A (fr) 1937-06-23

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