TRAFFIC CONTROL TELEPHONE SYSTEMS Circuit - Sam Hallas

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TRAFFIC CONTROL TELEPHONE SYSTEMS Circuit Descriptions and Hints on Maintenance This bulletin deals with the operation and maintenance of the apparatus used in the "Standard" Traffic Control Telephone Systems. These systems are extremely simple to erect and maintain and if the following hints and instructions are carefully followed no difficulty will be found in installing and keeping the equipment in the best condition. Standard Telephones & Cables Ltd., its Representa- tives and Agents are always willing to give expert advice and assistance if desired. Registered Office: Connaught House, Aldwych, London, W.C.2. (TELEPHONE DIVISION) OAKLEIGH ROAD, NEW SOUTHGATE, LONDON, N.11 Telegrams : Essteecee Telex, London. Telephone : Enterprise 1234. D/RS6 Ed. 2/1 Page 1
Page 2 Control Office on British Railways
Page 4 and 5: CONTENTS Part Title Page 1 Key Syst
Page 6 and 7: swing of the meter needle either si
Page 8 and 9: One No. 4002-B Selector Key Case (c
Page 11 and 12: wires. This change of polarity is t
Page 13 and 14: Case), K2 terminal (Time Sending Se
Page 15 and 16: Where satisfactory operation cannot
Page 17 and 18: one is available (if not, with an o
Page 19 and 20: PART 2 4001-A SELECTOR KEY Selector
Page 21 and 22: The keys are easily removed from th
Page 23 and 24: Letter. Name. S.T.C. Code. A Impuls
Page 25 and 26: 4. When the key is normal the tip o
Page 27 and 28: the time terminal. During selective
Page 29 and 30: Cycle of Events on Receiving a Code
Page 31 and 32: Mechanical Requirements To assist i
Page 33 and 34: (b) The contact spring (Z) in the n
Page 35 and 36: Letter Name 4301-A 4304-A 4305-B A
Page 37 and 38: General PART 4 4001-B SELECTOR TEST
Page 39 and 40: 4001-B Selector Test Set, Schematic
Page 41 and 42: General PART 5 DIAL SYSTEM, SELECTI
Page 43 and 44: The speak key also connects the con
Page 45 and 46: normal, Relay IR is held operated a
Page 47 and 48: here that from SC bank contacts 29
Page 49 and 50: from Line switch SC banks 1 and 2 a
Page 51 and 52: Line Test Set . . . . . . Designed
Page 53 and 54:
Line Voltage Curves Fig. 14. The op
Page 55 and 56:
General PART 7 LINE TEST SET-LU.310
Page 57 and 58:
Operating Instructions 1. Voltage M
Page 59 and 60:
the particular line to the earthed
Page 61 and 62:
Operate CVK, note meter reading on
Page 63 and 64:
10. Impulse Ratio Check on Selectiv
Page 65 and 66:
12. Telephone Communication. (See F
Page 67 and 68:
Page 65
Page 69 and 70:
Armature Travel Armature travel is
Page 71 and 72:
Contact Sequence The standard conta
Page 73 and 74:
chloride or trichlorethylene. The t
Page 75 and 76:
PART 9 ADJUSTMENT AND MAINTENANCE D
Page 77 and 78:
9. Armature Restoring Springs:— T
Page 79 and 80:
Oil dag should be applied as above
Page 81 and 82:
3. Pawl Spring Tension 3.1 With the
Page 83 and 84:
8.6 The wipers shall exert a pressu
Page 85 and 86:
2.2 The wipers shall rotate smoothl
Page 87:
Registered Office: CONNAUGHT HOUSE
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TRAFFIC CONTROL TELEPHONE SYSTEMS Circuit - Sam Hallas

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