US2135015A - Selector for electric connecting systems - Google Patents

Selector for electric connecting systems Download PDF

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Publication number
US2135015A
US2135015A US94258A US9425836A US2135015A US 2135015 A US2135015 A US 2135015A US 94258 A US94258 A US 94258A US 9425836 A US9425836 A US 9425836A US 2135015 A US2135015 A US 2135015A
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United States
Prior art keywords
contacts
selector
stationary
movable
electromagnet
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Expired - Lifetime
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US94258A
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English (en)
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Richter Morten Balthazar
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Individual
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Individual
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H67/00—Electrically-operated selector switches
    • H01H67/02—Multi-position wiper switches
    • H01H67/04—Multi-position wiper switches having wipers movable only in one direction for purpose of selection
    • H01H67/06—Rotary switches, i.e. having angularly movable wipers

Definitions

  • selectors For electric connection systems, for instance automatic and semi-automatic telephone plants, it is common to use selectors with one or more rows of stationary contacts arranged along cir- -5 cular arcs and with one or more movable contacts adapted to move in circles each along one of these rows of contacts, all for the purpose of establishing a desired circuit connection across a contact in each of the said rows.
  • Selectors of this kind have to fill the requirement that the resistance to the adjusting motion of the selector must be very small, and that this motion should stop practically instantaneously when the selector, during its rotary motion, has found a desired circuit connection. Further, the contacts of the selector, even after a long use, must not be exposed to any Wear giving rise to vibrations and poor contact connection.
  • the selectors known heretofore do not fill these requirementsvto a sufficient extent, for instance because not only the movable contacts-the selecting contacts-which serve to find the circuit connection corresponding to a desired adjustment of the selector, but also the movable contactsthe so-called line contactsserving to effect the subsequent establishment of the circuit connection during the rotary motion of the selector, will slide on stationary contacts in the selector.
  • the present invention relates to a selector with rotary adjusting motion by which the above mentioned requirements are filled.
  • the movable line contacts adapted to effect a selected circuit connection are, like in the last mentioned known selectors, disposed in such a manner in their supporting member that they can be displaced radially on the same, within certain limits, and according to the invention they are kept out of contact with the stationary line contacts during the rotary motion.
  • the movable line contacts according to the invention are connected mechanically to the coupling means controlled electromagnetically in known manner and serving to couple together the rotary part of the 55 selector and the driving mechanism of the same,
  • the most preferable construction of the selector according to the invention is distinguished in that the electrcmagnet serving to control the coupling connection between the selector and the driving mechanism of the same is centrally disposed relatively to the selector, in such a manner that the iron core and the coil of the said electromagnet do not partake in the rotary motion.
  • the iron core is used as a stationary pivot pin for the movable part of the selector, and the electromagnet coil encircling the iron core is supported by the iron core or the stationary part or base of the selector.
  • the armature of the electromagnet is journalled about the rotary part of the selector in close connection with the said iron core, and is connected mechanically to the movable line contacts provided on the same part ofthe selector as well as to the coupling means supported by the same selector part and serving to couple the latter to a rotary driving disc.
  • the desired circuit connections are effected each merely across one single stationary contact, and on the movable part of the selector there must consequently be provided a connection common to all the circuits.
  • the said selectors cannot be used for selection between several mutually independent circuits, and their field of usefulness is therefore rather limited.
  • Selectors of the present nature may be rendered more universally useful by providing according to the invention, in the selector, besides the above mentioned line contacts-not like in the selectors known heretofore merely one-but, on the contrary, two separate sets of searching contacts consisting each of a contactthe movable searching contact-fixed on the movable se lector part, and of a row of stationary contacts arranged along a circular are, along which stationary contacts the movable searching contact can slide during the rotary motion of the selector.
  • Fig. 1 shows a selector, in top view
  • FIG. 3 in perspective view, a portion of the selector shown in Figs. 1 and 2,
  • Fig. l a longitudinal section of a coupling member
  • Fig. 5 a bottom view of the same.
  • Figs. 1 and 2 is a support, shaped as a part of a cylinder, for the stationary line contacts i and 2 in a selector, the movable line contacts 3 of which are slideably supported on plates 34 of electric insulating material.
  • the said plates are slideably mounted on a supporting member 4 pivoted about a vertical axis A.
  • the supporting member 4 is attached to the bottom part of a mainly box-shaped casing 25 containing a not shown electromagnet-coil which encircles a vertical iron core 5.
  • the casing 25 is pivotally mounted on this core in such a manner that the casing 25 and the supporting member 4 can be rotated about the axis of the iron core 5.
  • the iron core 5 is stationary.
  • the electromagnet coil which is disposed in the casing 25, and in which the pin 25 forms the iron core, is inserted in a not shown control circuit which, by being closed, couples the movable part of the selector to a continuously rotating driving pulley [5.
  • the supporting member 4 for the movable contacts supports two plate pieces 9 standing edgewise and being made of iron or some other magnetic material. These plates rest with their bottom edges on the top side of the supporting memher 4 and extend each with a tongue 30 down through an incision in the supporting member. These two pieces of plate form the movable armature of the electromagnet consisting of the iron core 5 and the casing 25 and the electromagnet coil contained in the latter, the said armature being consequently divided in two.
  • the upper end bottom of the casing 25 forms a pole shoe for the iron core 5.
  • Two opposite edges 28 on the end bottom 2? face each one of the two armature parts 8, and attract the latter when current is supplied to the electromagnet.
  • the plates 34 carrying the movable contacts 3 are made from electrically insulating material, and are radially disposed relatively to the axis of rotation A, and they rest each partly on a part i bent upward from the supporting memher 4, and partly in slots 33, Fig. 3, in each of the armature parts 9, and the plates 34 are fixed in the said slots by means of pins 35, Fig. 2.
  • the downward facing tongues 39 on the armature parts 9 extend down into a hole 3
  • each of the plates 34 consist each of a thin metal lamina fitted with two slots 36 and 31, by means of which the metal lamina engages pins 38 and 39, respectively, on the plates 34, in such a manner that each of the contacts 3 can be displaced radially, but not axially, on the plates 34.
  • the two armature parts 9 are coupled together by being each fitted with two flaps 24 bent at right angles cf. Figs. 2 and 3, and extending along each side of the casing 25.
  • the two flaps 24 of the armature parts on the same side of the casing, engage one another, a projection 49 on one of the said flaps engaging an incision in the other flap.
  • the said flaps form thus a linked connection between the two armature parts 9.
  • the selector supports, on diametrically opposite sides of the supporting member 4, two sets of movable line contacts 3, one of which sets moves out of the range of the stationary line contacts I and 2, when the other set enters in front of the same during the rotation of the selector in the direction shown by the arrow in Fig. 1.
  • the stationary line contacts I and 2 are insulated mutually and from the supporting member 0, and are constructed as contact springs.
  • the individual contact sets comprise each the number of stationary line contacts I and 2 that are selected simultaneously by the movable line contacts 3 placed above one another, i. e. in general all the contacts I and 2 situated in one and the same section through the axis of rotation A of the selector, and in the individual contact sets the said contacts are disposed in such a manner that they are short-circuited in pairs by the movable line contacts 3, when the latter are adjusted to the set of contacts concerned.
  • the circuits that have to be connected by means of the selector are connected each to the corresponding separate pair of stationary line contacts I and 2, in such a manner that the said circuits are closed, when the line contacts concerned are short-circuited by a contact 3.
  • each set of stationary contacts contains two searching contacts ll.
  • the latter are connected to the circuit that by being connected across these contacts and the movable searching contacts I6 sliding thereon have to cause the adjusting motion of the selector to stop.
  • stationary line contacts across which the desired connection is established Viz. by a single short-circuiting of these contacts, all the circuits, if desired, may be maintained entirely separated, and thereby the field of usefulness of the selector becomes wider than for the selectors known heretofore, and the stationary sets of contacts may for instance be connected group-wise or single each to one of several dilferent outer systems that are desired to be served by one and the same selector, and for instance one single selector of the above described kind may control line searches as well as group selectors and line selectors or other similar systems by dividing that stationarycontacts of the selector into groups connected separately to one or the other of the said systems.
  • the stationary rows of contacts I and 2 cover an arc of 180. During the course of each full revolution of the supporting member 4, all of the stationary contacts I and 2 will therefore be searched twice, there being provided two sets of movable contacts 3, as mentioned above.
  • the movable searching contacts I6 are each divided into two, in such a manner that they will encircle the stationary searching contacts I! and rest against both sides of the same.
  • the movable searching contacts I6 are attached to an insulated supporting member 50 on the supporting member 4, the attachment of the former to the latter being effected by means of bolts 5
  • the outer ends 53 of the contacts I6 are bent, as appearing from Fig.
  • each of the contacts I6 are in contact along the edges of the bent parts pointing rearward in the direction of motion, but are separated slightly from one another at the edges pointing forward in the direction of the, motion, also when the edges l6 are not touching the contacts I'I.
  • the two parts of a contact I6 will always move inward about a stationary contact I], and will always rest against both sides of the latter with a resilient pressure during the motion of the selector.
  • the coupling members 32 which act by friction against the face I4 on the driving pulley I5 may be replaced by pawls co-operating with a circular row of teeth or with axial grooves or cams on the inner face, and that the number of line contacts and searching contacts in a set of contacts is arbitrary.
  • the rotary motion of the supporting member 4 and the parts attached thereto will stop when the electromagnet disposed in the casing 25 is rendered current-less.
  • the motion of the selector should stop momentaneously, and therefore the vis viva of the moving part should be as small as possible.
  • a pawl mechanism which after the armature parts have been released by the electromagnet will instantaneously stop any further motion of the selector.
  • the upper end of the iron core 5 projecting through the casing 25 is fitted with a stationary ratchet wheel 42 engaged by four pawls 45, cf. Fig. 1.
  • Each of the said pawls is pivoted to the top side of the casing 25, in such a manner that they can swing about pins 8, and are maintained in engagement with the ratchet wheel 42 by means of springs 46, which are inserted each between two pawls disposed on the same side of the casing 25.
  • the four pawls 45 are adjusted in such a manner that for an angular motion corresponding to one quarter of the pitch of the ratchet wheel 42, one of the pawls will always slide into engagement with a tooth on the ratchet wheel, in such a manner that the lost motion of the latter and, consequently, or" the rotary part of the selector can never exceed one quarter of the pitch of the ratchet wheel.
  • a practically momentaneous stop of the selector will be attained.
  • a selecting switch of the power driven type for electric connecting systems comprising a plurality of stationary terminals arranged in a number of circular arcs, a rotatable member centrally disposed relatively to said arcs, a driving member, adjustable means to couple said rotatable member to said driving member, two sets of movable contacts adjustably mounted on said rotatable member on opposite sides of the central portion of same so as to be shifted radially on same to engage by turns the stationary terminals, two upright disposed levers supported at their lower ends upon the rotatable member on either side of the axis of revolution of same, an electromagnet engaging said levers to swing them when the electromagnet is energized, means to connect each of said sets of movable contacts to one of said levers, and means connecting the levers to the means for coupling the rotatable member to the driving member, in order that the two levers, when swung by the action of the electromagnet, are caused to shift said sets of movable contacts radially away from the arc
  • a selecting switch of the power driven type for electric connecting systems comprising a plurality of stationary terminals arranged in a number of circular arcs, a rotatable member centrally disposed relatively to said arcs, a driving member, adjustable means to couple said rotatable member to said driving member, two sets of movable contacts adjustably mounted on said rotatable member on opposite sides of the central portion of same so as to be shifted radially on same to engage by turns the stationary terminal, two upright disposed interlinked levers freely supported at their lower ends upon the rotatable member on either side of the axis of revolution of same, an electromagnet engaging said levers to swing them when the electromagnet is energized, means to connect each of said sets of movable contacts to one of said levers, and
  • a selecting switch of the power driven type for electric connecting systems comprising a plurality of stationary terminals arranged in a number of circular arcs, a rotatable member centraliy disposed relatively to said arcs, a driving member, adjustable means to couple said rotatable member to said driving member, two edgewise disposed plates of electric insulating material adjustably mounted on the rotatable member so as to extend radially at opposite directions relatively to the axis of revolution of the rotatable member, two upright disposed interlinked levers freely supported at their lower ends upon the rotatable member on either side of the axis of revolution of same, an electromagnet engaging said levers to swing them when the electromagnet is energized, a number of radially disposed resiliently mounted movable contacts on each of said edgewise disposed plates of electric insulating material, means to connect each of said plates to one of said levers, and means connecting the levers to the means for coupling the rotatable member to the driving member, in order that the two levers,
  • a selecting switch of the power driven type for electric connecting systems comprising a plurality of stationary terminals arranged in a number of circular arcs, a rotatable member centrally disposed relatively to said arcs, a driving member, adjustable means to couple said rotatable member to said driving member, two edgewise disposed plates of electric insulating material adjustably mounted on the rotatable member so as to extend radially at opposite directions relatively to the axis of revolution of the rotatable member, two upright disposed interlinked levers freely supported at their lower ends upon the rotatable member on either side of the axis of revolution of same, an electromagnet engaging said levers to swing them when the electromagnet is energized, a number of radially disposed and resiliently and adjustably mounted contacts on each of said edgewise disposed plates of electric insulating material, springs connecting each of said contacts separately to the plate, separate means to support each of said contacts upon said plate so as to allow each contact when engaging the terminals by the action of said spring to adjust itself radi
  • a selecting switch of the power driven type for electric connecting systems comprising a plurality of stationary terminals arranged in a number of circular arcs, a rotatable member central- 1y disposed relatively to said arcs, a driving member, adjustable means to couple said rotatable member to said driving member, two edgewise disposed plates of electric insulating material adjustably mounted on the rotatable member so as to extend radially at opposite directions relatively to the axis of revolution of the rotatable member, two upright disposed interlinked levers freely supported at their lower ends upon the rotatable member on either side of the axis of revolution of same, an electromagnet engaging said levers to swing them when the electromagnet is energized, a number of radially disposed and resiliently and adjustably mounted contacts on each of said edgewise disposed plates of electric insulating material, springs connecting each of said contacts separately to the plate,

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  • Reciprocating, Oscillating Or Vibrating Motors (AREA)
  • Electromagnets (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
US94258A 1935-08-16 1936-08-04 Selector for electric connecting systems Expired - Lifetime US2135015A (en)

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Application Number Priority Date Filing Date Title
DK2135015X 1935-08-16

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US2135015A true US2135015A (en) 1938-11-01

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US (1) US2135015A (fr)
BE (1) BE415057A (fr)
DE (1) DE685326C (fr)
FR (1) FR809568A (fr)
GB (1) GB473557A (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2512261A (en) * 1943-10-20 1950-06-20 Leich Electric Co Automatic switch
US2542997A (en) * 1945-06-01 1951-02-27 Int Standard Electric Corp Reciprocatory driving mechanism
US2662936A (en) * 1949-07-07 1953-12-15 Hartford Nat Bank & Trust Co Mechanically driven selector switch

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE906580C (de) * 1951-02-05 1954-03-15 Siemens Ag Drehwaehler fuer Fernmeldeanlagen, insbesondere Fernsprechanlagen, mit magnetisch angtriebener, die Sprechleitungsarme beim Lauf des Waehlers in abgehobener Stellung haltender Vorrichtung
FR1138952A (fr) * 1955-12-06 1957-06-24 Cie Ind Des Telephones Commutateur rotatif

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2512261A (en) * 1943-10-20 1950-06-20 Leich Electric Co Automatic switch
US2542997A (en) * 1945-06-01 1951-02-27 Int Standard Electric Corp Reciprocatory driving mechanism
US2662936A (en) * 1949-07-07 1953-12-15 Hartford Nat Bank & Trust Co Mechanically driven selector switch

Also Published As

Publication number Publication date
BE415057A (fr)
FR809568A (fr) 1937-03-06
GB473557A (en) 1937-10-14
DE685326C (de) 1939-12-15

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