GB191327018A - Improvements in Selective Electric Signalling. - Google Patents

Improvements in Selective Electric Signalling.

Info

Publication number
GB191327018A
GB191327018A GB191327018DA GB191327018A GB 191327018 A GB191327018 A GB 191327018A GB 191327018D A GB191327018D A GB 191327018DA GB 191327018 A GB191327018 A GB 191327018A
Authority
GB
United Kingdom
Prior art keywords
relay
line
circuit
omnibus
station
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
Application number
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.)
NEW PHONOPORE TELEPHONE COMPAN
Original Assignee
NEW PHONOPORE TELEPHONE COMPAN
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 NEW PHONOPORE TELEPHONE COMPAN filed Critical NEW PHONOPORE TELEPHONE COMPAN
Application granted granted Critical
Publication of GB191327018A publication Critical patent/GB191327018A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q5/00—Selecting arrangements wherein two or more subscriber stations are connected by the same line to the exchange
    • H04Q5/02—Selecting arrangements wherein two or more subscriber stations are connected by the same line to the exchange with direct connection for all subscribers, i.e. party-line systems
    • H04Q5/06—Signalling by amplitude or polarity of dc

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Radio Relay Systems (AREA)

Abstract

27,018. New Phonopore Telephone Co., and Nicholson, A. H. Nov. 24. [Cogna Application, 29,046/13.] Party-line systems are arranged with a number of omnibus circuits a b c, Fig. 1, branching from the main circuit 3, 4, and a station is called by energizing first the relay A, C, D, &c. characteristic of the omnibus circuit and then the relay C ... L of the required station on that circuit. The relays A, C, D, &c. in the main circuit are energized by combinations of current over the two lines and earth, and the relays on an omnibus circuit may be energized in the same way, or the stations on an omnibus circuit may be called by code. The connexion to eich omnibus circuit is broken by energizing the corresponding B relay. Fig. 2 shows the arrangement of relays for connecting the main line 3, 4 to an omnibus line 15, 16 on this system. When the relay 8 is energized by its proper combination of currents, the relay 11 is brought into circuit with the battery 12, thus connecting the line 3, 4 to the line 15, 16 over the contacts 17, 18, and disconnecting the distant part of the line 3, 4. The relay 11 locks itself up over the contact 19 so that further selecting-currents can be sent by the commutator 1 at the central station to call the desired station on the omnibus circuit. When the release relay 9 is energized, the relay 11 is short-circuited, and the apparatus is restored. A station on the omnibus circuit 15, 16 can energize the relay 10 by the B combination of currents, thus connecting the battery 12 to the main line to call the central station, or connecting a calling vibrator to line. In the system shown in Fig. 3, the first ten stations are called by sending first the A combination of currents and then a combination C ... L. The B combination again effects the release. Other stations are called by sending the C combination followed by a combination D ... L, and so on. The last station of each set disconnects the distant portion of the main line. In a further modification, the stations on an omnibus circuit branching from the main line are called by code. In this case, a station can call the central station by connecting both sides of the omnibus line to earth through a battery.
GB191327018D 1913-11-24 1913-11-24 Improvements in Selective Electric Signalling. Expired GB191327018A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB191327018T 1913-11-24

Publications (1)

Publication Number Publication Date
GB191327018A true GB191327018A (en) 1914-09-03

Family

ID=32646740

Family Applications (1)

Application Number Title Priority Date Filing Date
GB191327018D Expired GB191327018A (en) 1913-11-24 1913-11-24 Improvements in Selective Electric Signalling.

Country Status (1)

Country Link
GB (1) GB191327018A (en)

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