TRAFFIC CONTROL TELEPHONE SYSTEMS Circuit - Sam Hallas

More documents

Recommendations

Info

Page 48 APPARATUS USED ON A TYPICAL DIAL SENDING TRAFFIC CONTROL SYSTEM At the Control Station Keyboard . . . . . . . . . . . . Selective Circuit Panel, Code LX.3215 . . . . . . . . Selective Circuits Rack . . . . . . Circuit Breaker Indicator and Reset Cabinet . . . . . . . . . . *Auxiliary Apparatus Rack . . . . Main Distribution Frame . . . . One for each Controller. One for each Selective circuit. For mounting the selective circuits apparatus. Usually two per Control, one in the Apparatus Room and one in the Control Office. One or more, depending on the number of additional circuits, such as Junction, Omnibus circuits, etc., required. Usually one per System. Intermediate Distribution Frame Supplied if required. * This may be combined with the Selective Circuit Rack on small installations. Battery Supplies. 50-volt D.C. for operating the relays at the Control. The Busy lamps (P.O. Switchboard type) are usually illuminated from an A.C. source, since the load on a battery might, at certain periods, be a heavy one. In the event of a mains failure, the system can still be operated without the busy lamp indications. It is recommended that the call lamps be operated from a battery, since the load is not as heavy as that of the busy lamps. As they cannot easily be dispensed with it is preferable to have a constant source of supply, independent of the local mains. In some cases, 6 volt switchboard lamps have been used for both call and busy positions, thus giving a lower power consumption. Line Signalling Supply . . . . This voltage to be in accordance with the curves on pages 51 or 52, derived from A.C. mains rectifier, storage battery and charger or primary cell battery, as required.
Line Test Set . . . . . . Designed for the purpose of making periodic line tests or locating faults which occur on the line. At Each Way Station For use where the Controller is listening continuously, one of three methods may be employed. 1. One 4001-A Selector Set and One 4308-C Telephone Set or 2. One 4002-A Selector Set (Combined Selector and Telephone Set) or 3. One 4001-A Selector Set One 4311-A Telephone Set One 4001-A Foot Switch For use where the Controller is not listening continuously:- Magneto Calling Wall Mounting types Desk type Telephone 1. With the addition of the 4013-A Generator either of the three methods previously described may be used. or 2. One 4001-A Selector Set Wall Mounting type One 4101-AK Telephone Set Line Loop Calling 1. One 4001-B Selector Set One 4311-D Telephone Set or 2. One 4002-B Selector Set or 2. One 4002-C Selector Set 4304 Type Selector Wall Mounting type Desk type Telephone Wall Mounting type A selector is required at each way station, irrespective of the type of selector set used. It is not an integral part of the selector set, and must be ordered separately. Page 49
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 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: from Line switch SC banks 1 and 2 a
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

TRAFFIC CONTROL TELEPHONE SYSTEMS Circuit - Sam Hallas

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?