CHAPTER III.
THE SYSTEM AND APPARATUS OF THE BATCHELLER PNEUMATIC TUBE COMPANY.
GENERAL ARRANGEMENT AND ADAPTABILITY OF THE SYSTEM 57
THE SIZE OF TUBES 64
SYSTEM OF VERY LARGE TUBES 65
GENERAL ARRANGEMENT OF APPARATUS IN THE STATIONS—TWO-STATION, TWO-COMPRESSOR LINE 69
TWO-STATION, ONE-COMPRESSOR LINE 72
THREE- TO EIGHT-STATION LINE 74
SENDING APPARATUS 79
SENDING TIME-LOCK 84
INTERMEDIATE STATION TIME-LOCK 88
ELECTRO-PNEUMATIC CIRCUIT-CLOSER 91
THE OPEN RECEIVER 94
THE CLOSED RECEIVER 99
THE INTERMEDIATE STATION RECEIVING AND TRANSFER APPARATUS 106
CARRIERS 115
AIR SUPPLY 117
FANS 117
BLOWERS 117
AIR COMPRESSORS 118
THE TUBE, LINE CONSTRUCTION, ETC. 122