US1470991A - Telephone-exchange system - Google Patents

Telephone-exchange system Download PDF

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Publication number
US1470991A
US1470991A US408852A US40885220A US1470991A US 1470991 A US1470991 A US 1470991A US 408852 A US408852 A US 408852A US 40885220 A US40885220 A US 40885220A US 1470991 A US1470991 A US 1470991A
Authority
US
United States
Prior art keywords
relay
contact
switch
winding
circuit
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
US408852A
Other languages
English (en)
Inventor
Alben E Lundell
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.)
AT&T Corp
Original Assignee
Western Electric Co Inc
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
Priority to US1522875D priority Critical patent/US1522875A/en
Application filed by Western Electric Co Inc filed Critical Western Electric Co Inc
Priority to US408852A priority patent/US1470991A/en
Priority to DEW59349D priority patent/DE401008C/de
Application granted granted Critical
Publication of US1470991A publication Critical patent/US1470991A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements

Definitions

  • iRelay's jll land-14L arefener 1gi z'ed in' this circui't a n'd relay 11, upon en erg-12mg, locks?upfthrough its left hand ar:- mature and front contact and the lower left handcontactofse'quence switch spring 12 E'togroundedconducton13L]
  • I -Relay" -.1'1at its right hand armature and front contact completes a circuit from grounded I battery, jpower magnet of se- 1 Q'quenc'e switch 17 upper contajcto'f sequence switch springlS, right hand armature and front contact of relay 11 to ground, for "mov ng thls sequence w tch out. of poslt on 1 and into position 2.
  • relay 14 v is intermittently energized to control the op- 'erationoit the counting relays in the well known manner. .l Vhenthe O counting re,- iay isen'ergized', the clrcuit through Stepplng magnethfis permanently opened and when, amoment later commutator brush 21 engages an nsulatlng 'se'gment of commutator22, relay-11isde energiz'ed and conipletes a i c ircuit;jfrom "grounded battery,
  • a circuit is thereupon completed from grounded battery, I winding o'l rfelay 11, upper con tactfof sequence-switch spring 27, test brush '25, test terminal 26, and thence to g'round 11' islenejrgized in this "circuit' and completes soon test brush .25, en'gagestest terminal 28, which is associated with the firstidle trunk intli'e group. relay l1de-enernizes,
  • terrupter wheel 67 engagesi the contact and back contact of relay 24,;winding of.
  • relay 24 lower armatureandback contact of relay '29, terminal 40; brush 39,xlower contact of. sequence switch spring 42 to ground;
  • Stepping magnet is now energized andf de-energized*-three times under the 1 control of impulse wheel 71, it 'beingnoted that wheeli7 1 is arrangedto send three impulses.
  • impulse conductor 72 would-h'ave been connected through to control stepping magnet 65 and only one iimpulse would' have been sent-.1 (Only three, ofi normalposi v sitions ofthe auxiliary eswitch have been indicated in the drawing, but itis obvious 6d mag'netj65, winding :of. slow; release v:relay that any numberl'of positionscouldbeused and the impulsewheel may be arranged :to
  • relay- 24c connects to ground as described.
  • Relay 29 is energized and by attracting its armatures con- 7 V nects the; tip and ring; conductors through ,to'the maintipandring conductors 37 and 38 ofthe selected trunk;
  • the replac al ofthe calling subscribers receiver causes the deenergization of relay ⁇ 18, and thereplacalofthe calledrsubscribers receiver results in the de-energization of relay 43.
  • Thede-energization ot relay 18 cans sin turn'tho, de-fle'nergization of relay 44,5. Theyoperation o f zither supervisory signals' (not shownijcontrolledby relays 48 grounded battery, power gmagnet' of sequence into position 18.- i
  • the brush shaft is'-'r,eturned to its normal :position under: the control of 'magnet 19 i and as soon as commutator brush 21 engages normal commutator "segment -51, a circuit is completed from grounded battery, winding 20f power magnet of sequence switch 17, lower contact of sequence switch spring 52, commutator segment 51, commutator brush 21 to ground, for moving'se quence switch 17 out of position-1'81 andinto position 1.
  • ine ma net 65 is ener ized in this circuit b b v number of turns ot' 'said secondary Winding to; the number *of J-turns of said primary, winding, and means-associated with said tween an incoming line and an outgoing line, a-repeating coil associated withsaid link circuit, said repeating coil comprising a primary winding and a secondaryfwinding, a switching device forvarying the ratio of the number of turns of said secondary winding to the number of turns of said primary winding, animpulse producing device common to said outgoing lines,
  • an automatic switch comprising a set of movable contacts and a plurality of sets of station- 'ary contacts, a link circuit terminating in; said movable contact set, a plurality of out-c going lines terminating in said stationary contact sets, means to supply series of impulses to said contact sets,'said series of impulses varying in; number in accordance with thecharacter of said outgoing hnes, a repeating coil associated with said link-cir-- cuit, said repeating coil comprising aiprimary winding and a secondaryxwinding,
  • an automatic switch comprising a set of movable contacts and a pluralityofstationary contact sets, a link circuitterminating in'said movable contact set, a plurality of outgoing lines terminating in said stationary contact sets, a progression controlling device, an
  • auxiliary switch associatedwith saidautomatic switch, means to operate said automatic switch in a hunting movement to select an outgoing line which-is in a desired I condition, a repeating coil associated with said link circuit, said repeating coil comprislng a primarywinding and a secondary winding, and means operative: in a certain 'pOS1t1011 of sa d progression controllingdevice to advance said'auxiliary switch in accordance with characteristics of the selected outgoing lines terminating in said stationary contact sets a progressionswitch and" .
  • an auxiliary 'step -by-step switch associated withisaid automatic switch means 'to'o peiz ate said automaticswit'chin ahunting movement to select an outgoing line in a desired condition, a repeating coll associated with said link, circuit, said repeating-coilcomprising,arprimarywinding anda secondary V winding, and means to supply a variable number of impulses in accordance with the characterfof the outgoingline selected to operate said step-by-step auxiliary switch to'
  • incom- 'ingzlines means to transmit voice currents over said incoming lines, outgoing lines, av

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Interface Circuits In Exchanges (AREA)
US408852A 1920-09-08 1920-09-08 Telephone-exchange system Expired - Lifetime US1470991A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US1522875D US1522875A (en) 1920-09-08 Telephone-exchange system
US408852A US1470991A (en) 1920-09-08 1920-09-08 Telephone-exchange system
DEW59349D DE401008C (de) 1920-09-08 1921-09-09 Schaltungsanordnung fuer Signalanlagen

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US408852A US1470991A (en) 1920-09-08 1920-09-08 Telephone-exchange system

Publications (1)

Publication Number Publication Date
US1470991A true US1470991A (en) 1923-10-16

Family

ID=23618037

Family Applications (2)

Application Number Title Priority Date Filing Date
US1522875D Expired - Lifetime US1522875A (en) 1920-09-08 Telephone-exchange system
US408852A Expired - Lifetime US1470991A (en) 1920-09-08 1920-09-08 Telephone-exchange system

Family Applications Before (1)

Application Number Title Priority Date Filing Date
US1522875D Expired - Lifetime US1522875A (en) 1920-09-08 Telephone-exchange system

Country Status (2)

Country Link
US (2) US1470991A (de)
DE (1) DE401008C (de)

Also Published As

Publication number Publication date
DE401008C (de) 1924-08-25
US1522875A (en) 1925-01-13

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