TRAFFIC CONTROL TELEPHONE SYSTEMS Circuit - Sam Hallas

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Page 34 Exploded Views of 4304-A Selector Fig. 10a.
General PART 4 4001-B SELECTOR TEST SET 4901-B Test Set Fig. 11. The 4001-B Selector Test Set (Figures 11 and 12) is a portable set designed for testing selectors and selector sets for their electrical operation. The more important pieces of apparatus contained in the set are as follows :— The battery switching relay (A. Figure 12) code 4662-MAZ. The battery reversing or impulsing relay (B, Figure 12) code 4662-MAZ. Potentiometer YJ, code 4014-AG, shunted across B relay provides a means of adjusting the impulse ratio. Page 35
Page 2 and 3: TRAFFIC CONTROL TELEPHONE SYSTEMS C
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: Letter Name 4301-A 4304-A 4305-B A
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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