US1733580A - Telephone system - Google Patents

Telephone system Download PDF

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Publication number
US1733580A
US1733580A US306811A US30681128A US1733580A US 1733580 A US1733580 A US 1733580A US 306811 A US306811 A US 306811A US 30681128 A US30681128 A US 30681128A US 1733580 A US1733580 A US 1733580A
Authority
US
United States
Prior art keywords
relay
line
contact
test
current
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
US306811A
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English (en)
Inventor
Raymond E Collis
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
Bell Telephone Laboratories 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 US1733080D priority Critical patent/US1733080A/en
Application filed by Bell Telephone Laboratories Inc filed Critical Bell Telephone Laboratories Inc
Priority to US306811A priority patent/US1733580A/en
Priority to FR671055D priority patent/FR671055A/fr
Application granted granted Critical
Publication of US1733580A publication Critical patent/US1733580A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47K—SANITARY EQUIPMENT NOT OTHERWISE PROVIDED FOR; TOILET ACCESSORIES
    • A47K13/00—Seats or covers for all kinds of closets
    • A47K13/06—Auxiliary or portable seats for children
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S4/00—Baths, closets, sinks, and spittoons
    • Y10S4/08—Rubber seats

Definitions

  • rlfhis invention relates to telephone systems and particularly yto improvements in part-y line ymessage registration.
  • the object is to enable the performance of a more positive and reliable ⁇ test of party lin-es to identity the station originating the call.
  • a feature off ⁇ the. invention is a system in which the substations on a party line are equipped with devices which permit the How .ot current in one direction, but oder substan- -tial resistance to flow inthe opposite di 'rection, the ldevices aty a plurality oi said substations being connected in series with the talking circuit.
  • Another feature is a' testing arrangement at ythe central oilice by means of which a number of preliminary ⁇ tests are made to partially establish the identity of ⁇ the ycalling station, following which Zone of a number of yiinal tests is made, dependent on the results of the preliminary tests,-to completely identify said calling station.r
  • Fig.2 is a modiiication of the sys-
  • the subscribers line L, shownin Fig. ⁇ 1 is provided with four .substationsin B, U and D. All tour of these substations are equipped with' unidirectional current ⁇ 'carrying devices 'connected in diii'erent ways to enable a d1stinctive test todetermine the calling substation.
  • These devices being unidirectional or asymmetrical, permit current to flow in one direction, but resistthe flow of current in the opposite direction;
  • the unidirectional devices 1 and Saro connected in series with impedance ⁇ coils ⁇ 21and 4, respectively, to a contact of the receiver switchhoolr in such a manner that current of negative polarity is permitted to flow from* the line through the coils 2 and 4 and the devices 1 and 3 to ground.
  • the devices 6 and 8 included in series, re-
  • the uni-directional current devices may be of 'any suitable type such as ldescribed in the'Journal of the ⁇ American Institute ofElectrical'Enf i i i gineers for March 1927, page 215..
  • f -'lhe line L extends to the central office 'and terminates in the Contact bank of aline indf er switch F, which is' illustrated vschematically by the brushes l1 to 16 inclusive.
  • rline iinderF extends the line to the brushes@r ci a yselector,switch S also shown "schematiy cally.y
  • the line finder F and selectors may be of any suitable type such vas the power driven panel type switches described in the patent to McQuarrie, No. 1,177 ,044, granted et al,'No. 1,123,696, grantediJan. 5, 1915.
  • the selector ⁇ S A,and succeeding selector switches may be controlled by central oilice register senders, such as described in detail :go in the patent to Kopp, No. 1,589,402, granted J une 22, 1926 and the patent to Stearn et al, No. 1,395,977, granted Nov; 1, 1921.
  • rlhe test is divided into two parts, the first or preliminary test serving to determine which pair ot stations is responsible fortlie call.
  • the second or iinal test is made by the relays 26 and 27 and depends upon the outcome ot the iirsttest and serves to accurately determine which one ot the pair or" substations initiated the call.
  • r,his test circuit includes both the tip and ring conductors of the line L.
  • the tip conductor extends through the winding ot' the induction coil, the switchhool contacts, the coil 2 to the device 1. Since the polarity of the source 38, applied to the tip conductor, is negative, current is permitted toilowthrough the device 1 to ground and thence to the opposite pole ol battery 38. In like manner a circuit may be traced over the ring vside of the line through lthe impulse transmitter and talking transmitter and thence through the coil 2 and device V:1 to ground. Wit-h current ilowing in the test circuit relay 21 operates, and it locks ⁇ through its right winding and contact .to Vground at the sequence switch spring 31.
  • Relay 19 operates and locks through its upper winding and contact to the sequence switch spring 28. Relay 19 opens the preliminary test circuit above described and closes the tip side of the line to the conductor 45, thus establishing a second test circuit.
  • This second test circuit may be traced from the negative pole of battery 40, through the lower winding of test relay 26, conductor 45, upper front contact oi' relay 19, upper back contact ot relay 18, upper front contact of relay 17, thence over the tip side of the line through the coil 2 and the device 1 to ground. rlhe potential being of the proper polarity, current flows in this circuit and operates the relay 26.
  • Relay 26 locks through its upper winding and contact to ground at the sequence switch spring 31 ⁇ Later, the interrupter 23 shifts its contacts and a circuit is completed from ground through the lower contacts of the interruptor, inner lower contact of relay 17, lower front contact or relay. 19, through the spring 43 tov the sequence switch magnet 25. ⁇ Thus, the sequence switch advances into some subsequent position indicating that the test has been conipleted. As the sequence switch Vmoves out of position 12, the holding circuits of relays- 17, 19 and 20 are opened and these relays'release.
  • lfthe call is successful and the called sub scriber answers, a. supervisory relay such as the relay 32 operates and completes a circuit from ground through the spring 33, Contact of relay 32, right winding of relay 24 to battery. Relay 24 ⁇ operates and looks through lits left winding and contact to ground through theV spring 31. Subsequently, when conversation is completed and release is taking place, :the sequence switch 25 moves through successive positions, such as positions '15 to 17. l While the sequence switchris Inov- CTI ⁇ If the call is initiated at the substation B instead of substation A, the, relay 21 operates on the preliminary test thek same as it did in the instance above described.
  • the operating circuit of rela 21 extends over'the ring side of the line t rough the transmitters and switchhook at the station B, through the coil 4k and the device 3 to' ground.
  • the polarity of the source 38 being negative, current flows and relay 21 operates.
  • relay 26 is connected to the line as above described, the potential of source being nega'- tive, current will not flow through the tip side of the line due to the device 5, nor through j the ring side due to the device 3. Accordingly, no current flows in the test circuit and re'- lay 26 remains inert.
  • the metering circuit may nowbe traced from battery through the resistance 42, spring 30, outer right front Contact yof relay 21, inner lett back contact of relay 22, upper back contact of relay 26, brush 15, through the register 35 to ground.
  • the iirst test isfmade by connecting the left ⁇ winding of relay 21 to the tip and ring conductors, as explained. Since the polarity of the source 38 is negative, current does not How through the device y6 to ground. ⁇ Accordingly, relay 21 does not operate.
  • the next test is made by connecting the left winding ofrelay 22 tothe tip and ring conductors, as 'above described. Since the polarity of source 39 is positive, current flowsthroughboth tip and ring conductors through the coil 7 and the' device6 to ground. Relay 22 operates in this circuit and locks through its right winding and/contact to the sequence ,switch spring 31.
  • the second fportion of the test namely, to 'distinguish whether substation C or substation D is calling, is made by connecting the test relay 27l to the ring side Aof the lineL.
  • the circuit may be traced from the positive pole oit' battery 41, lower winding ⁇ of relay 27, lower iront contact ot relay18low ⁇ ,er front contact ot' relay 17 ,thence over the ring side of the line to the transmitters at they substation C, switchhool contact, coil 7, device'6 toground.r Current flowing in this circuit operates the relay 27 which locks through its upper winding and contact to the spring 31.
  • the 'metering circuit is closed from battery through therey y sistance 42, contact of relay 24, spring 30, outer right back contact of relay 21, middle contact of relay 22, upper front contact of relay 27, brush 14, register 36 to ground.
  • the register 36 charges the call to the substation C.
  • test relay 21 on being connected to the tip and ring conductors of the line, does not operf ate for the reason that current o'l' negative po-r larity cannot -tlow over either the tip side or the ring side of the linek due to the devices 8 and 10.
  • Relay 22 on being connected to the line operates since current of positive polarity is permitted to flow over the tip sidesof the line through the coil 9 and device 8 to ground.
  • the calling line L-,l has iour substations A-1,B*1, C-l and D 1 provided with unilateral devices the same as those .shown in Fig. 1.5
  • Devices 48, 50, 53 and 55 are connected in series with coils 49, 5l, 54 and 56, respectively, tok the switchhook contacts and with the poles arranged the saine as shown in Fig. 1.
  • the device 52 at substation B-1 1s connected in the tip sidethe same as device 5 in Fig. 1.”
  • the device 57 is connected in.r
  • the ⁇ inder F-1 is associated with selector switch S441, which selector and suc- Fig. 1.
  • Theline L ⁇ 1 terminates in the contacts of y ythe finder F-1 having brushes ⁇ 58 to 63, in,
  • test circuit entends over the tip andring conduct-ors through the substation eleinei coil to the device e8.
  • T ie polarity of the device e8 is such that current flows theretl rough and accordingly the relay 67 operates.
  • Relay 67 locks through its right Winding and contact ground at the vsequence switch spring 77.
  • Relay 65 operates and locks through its upper Winding and contact to the spring 74. Relay 65 disconnects he tip and Yring yconductors trom the conductor 87 and prepares a second test circuit including the relay 71. rihis test circuit may be traced rorn the negative pole of battery 88, 'through the lowerivinding of relay 71, upper tro tacts of relays 65 and 64, thence to the tip side ot the line L-1. Due to the polarity of the device 48 current tioyvs in this circuit and causes'the operation of relay 71. Relay 71 locks through its upper Winding and contact to the spring 77.
  • Relay 72 locks through its 'left Winding and contact to the spring 77.V ⁇ Y
  • Register 81 operates and charges the call to the substation A-l.
  • relay 67 operates the saine as in the case of substation A-l, Whereas relay 68 remains deenergized.
  • relay 71 is connected to the tip side or" the line, current does not flow troni the source 88 due to the device 52 the substation B-l. Accordingly, relay 7l remains deeneroized and themetering circuit eXtends as above traced through the middle back contact of relay 71, brush 62 and the register 82 to ground.
  • relay 67 does not operate, since negative vcurrent can ⁇ - ⁇ not flow through the device 58.
  • Relay 68 does, however, operatedue to the polarity of battery 86. With relay67 deenergized and relay 68 operated, relay V65 operates in a circuit from battery through its lower Winding, outer left Contact of relay 67 and thence to ground through the yinterrupterY 69,V as above traced. Relay 65 connects the relay 71 to the tip side of the line.
  • the test circuit may be traced from the battery 88 to the lower Winding of relayl, thence over the tip side of the line through the right Winding of the induction coil to the syvitchhoolr contacts through the talking transmitter and impulse sender and thence returning over the ring side of the line to the lower front contacts of relays 64 and 65 to ground.
  • Relay 71 operates yin this circuit and locks and subsequently the metering circuit may be traced from battery through resistance 78, contact of relay 72, spring 76, outer right back contact yof relay 67, middle contact of relay v68, upper front contact of relay 71, brush 61, Winding 'of theregister 83 to ground'.
  • relay 67 remains deenergized and relay 68 operates on the iirst test.- Gn the second test, however, relay 71 does not operate since negative current cannot flow through the device 57. Accordingly the metering circuit eX# tends as above traced through theupper contact ot' relay 71, brush 60, tothe Winding of the meter 84 to ground.
  • a line having a plurality of substations, devices, one at each substation connected in series With the talking circuit and arranged to permit the flow of current in one direction but to resist the flow or' current in the opposite direction, and a test circuit including the conductors of said line.
  • a line having a plurality oit' substations, rectifying devices, one connected in series With the talking cir cuit at each substation and arranged to allow the flow ot current in one direction and to resist the flow of current in the opposite direction, and a test circuit including one side of the line and one of said devices.
  • a line having a plurality of substations, devices, one at each substation connected in series With the talking circuit and arranged to permit the flow of test current in onedirection but to resist the flow of such current in the opposite direction, and a test rcircuit having one branch including one side of the line and a parallel branch including the other' side ot the line and one of said devices.
  • a line having a plurality of substations, each substation having a device connected in series with the talking circuit for permittingthe flow of current in one direction and resisting its flow in the opposite direction, a test circuit including the conductors of said line, a register, and means responsive to the flow of current in said test circuit for controlling the operation of said register.
  • a line having a plurality of substations, each substation liaving a device connected in series with the talking circuit for permitting the lovv ot current in one direction and resisting its flow in the opposite direction, a test circuit including the conductors or' said line, registers, one for each substation, and means responsive to the flow of current in said test circuit for selecting and operating one of said registers.
  • a party line each of a plurality of stations on said line having a device in series With the talking circuit for permitting the flovv ,of current in one direction and resisting the iloWA of current in the opposite direction, means for making a numher of preliminary tests on said line to partially identify a calling station, and means dependent on said preliminary tests for making a further test to determine the calling station.
  • a party line each of a pluralityy of stations on said line having a device in series With the talking circuit for permiting the flow yof current in one direction and resisting the flovv of current in the cpposite direction, means for making preliminary tests on said line by applying to the line sources of current of opposite polarity to partly identify a calling substation, and means dependent upon the result of said preliminary test for making a furthertest to completely identify the calling substation.
  • a party line each of a plurality of stations on said line having a device in series With the talking circuit for permitting the flow of current in one direction and resisting the lovv of current in the opposite direction, means 'for inakn ing a preliminary test over a circuit'including both sides of said line, and means dependent upon the result ofthe preliminary test for making a final test over one side of said line to identify a calling substation.
  • each of a plurality of stations on saidline having a device in series With' the talking'r circuit for permitting the flow of current in one direction and resisting the flovv of current the result of the preliminary test toidentify the calling substation.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Toilet Supplies (AREA)
  • Monitoring And Testing Of Exchanges (AREA)
US306811A 1928-09-19 1928-09-19 Telephone system Expired - Lifetime US1733580A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US1733080D US1733080A (en) 1928-09-19 Child s seat attachment pob toilet seats
US306811A US1733580A (en) 1928-09-19 1928-09-19 Telephone system
FR671055D FR671055A (fr) 1928-09-19 1929-03-07 Perfectionnements aux systèmes téléphoniques

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US306811A US1733580A (en) 1928-09-19 1928-09-19 Telephone system

Publications (1)

Publication Number Publication Date
US1733580A true US1733580A (en) 1929-10-29

Family

ID=23186955

Family Applications (2)

Application Number Title Priority Date Filing Date
US1733080D Expired - Lifetime US1733080A (en) 1928-09-19 Child s seat attachment pob toilet seats
US306811A Expired - Lifetime US1733580A (en) 1928-09-19 1928-09-19 Telephone system

Family Applications Before (1)

Application Number Title Priority Date Filing Date
US1733080D Expired - Lifetime US1733080A (en) 1928-09-19 Child s seat attachment pob toilet seats

Country Status (2)

Country Link
US (2) US1733580A (fr)
FR (1) FR671055A (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2548238A (en) * 1945-12-07 1951-04-10 Esther B Potts Auxiliary toilet seat
US3153248A (en) * 1961-05-08 1964-10-20 Hobart G Miller Toilet seat
US4412360A (en) * 1981-06-15 1983-11-01 Harold Levin Method of and apparatus for providing a personal sanitary toilet seat cover
US5146637A (en) * 1991-01-24 1992-09-15 Mark Bressler Female urine collection apparatus
US5619757A (en) * 1995-08-22 1997-04-15 Baratta; Richard A. Disposable inflatable sanitary toilet seat cover
US6473911B2 (en) 2000-11-29 2002-11-05 David G. Weiss Disposable, compact, portable toddler-size toilet seat protector
WO2008131183A1 (fr) * 2007-04-19 2008-10-30 Marilyn Deward Wilbarger Système de recouvrement de siège de toilette
US20100005582A1 (en) * 2008-07-09 2010-01-14 Pasquale Rao Motivational urinal for toilet training of young males
US20220039619A1 (en) * 2020-08-06 2022-02-10 April Barr Disposable and biodegradable potty training pad
USD948036S1 (en) * 2020-08-21 2022-04-05 Patricia Ceccacci Urine specimen collection unit

Also Published As

Publication number Publication date
FR671055A (fr) 1929-12-09
US1733080A (en) 1929-10-22

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