I'o-ITiON 1 



|R BOARD FOR EIGHT 

 TOWER BUILDING 



ELEVATORS 



vided with five cord circuit, operator's telephone cir- 

 cuit and one night alarm circuit. 



Telephones are also located at the special starter's 

 station boxes in the three sections of the building, 

 also in the elevator machine rooms on the 13th floor 

 Mezzanine, 36th floor Mezzanine, 39th floor Mezza- 

 nine, 42d floor Mezzanine, pent house, Singer Exten- 

 sion pent house, Bourne Building pent house, Engi- 

 neer's room, boiler room, repair shop and engine 

 room; the equipments being the standard central 

 energy equipment 



In addition to the equipment described, a line 

 for telephone service is run from the telephone 

 switchboard in the Engineer's office up through 

 the Tower to the 41st story, having Chapman floor 

 boxes at each landing. The wires for this service 



;m- connected into three vi.siial signals in Ihr switch- 

 board, and portable instruments provided vnth Chap- 

 man plugs .! n- furnished with the equipment for the 

 Chief Engineer's -service. This line of jacks being 

 in-tailed in order to allow mechanics working in the 

 pipe hatch hack of the elevators to have commnnica- 

 tion with the Chief Engineer's olliee. With the tele- 

 phone -sx-stem is furnished two sets of Helios storage 

 batteries of ten cells, each having a capacity of 8 

 amperes. 



The megaphones in each car consist of a powerful 

 transmitter with horn extension. These megaphones 

 are connected through swinging cables and fixed 

 wires with the starter's stations in the respective 

 sections of the building. A special starter's box in 

 each section is arranged with a series of keys so 

 that communication can be had by means of the 

 starter's telephones with either the Chief Engineer's 

 office and through the switchboard to any station on 

 that equipment, or by other keys he can communicate 

 any message or instructions he may desire to any one 

 or all of the operators in the cars; the megaphone 

 system being arranged so that the operators cannot 

 talk back. This equipment forms a very valuable ad- 

 junct in the equipment of the building, enabling the 

 Chief Engineer or any of those engaged in the service 

 to communicate directly with the parties interested. 



Power for operating the signal service, the bell ser- 

 vice in the building and for charging storage batteries, 

 is furnished through a bell switch- 

 board placed in the engine room, 

 power for which is supplied by 

 four Diehl type "E" No. 4 Motor 

 Generators, all operating from a 

 240-volt circuit. Two of these supply power at 75 

 amperes, 15 volts on secondary circuit and two at 100 

 amperes, 15 volts. 



The switchboard is supplied with Weston volt and 

 ammeters, with a four-point switch and shunts for 

 testing purposes for each. The board is also pro- 

 vided with a battery charging rheostat having a capac- 

 ity of 25 amperes and suflicient resistance to permit 

 charging a single Helios cell of 8 amperes operating 

 on a 15-volt generator circuit. Further, with switches 

 to operate the electroplating system, if desired, also 

 to operate bells, phonographs or other special services 

 in the building. All switches are "back-of-board" 

 type using enclosed fuses. The Shunt Field Regu- 

 lators and motor starting switch are the Cutler 

 Hammer "back-of-board" type. The switchboard 

 is Italian marble, supported on copper pedestals. 



50] 



ELECTRIC 

 POWER FOR 

 SPECIAL 

 SERVICE 



