which tlic rcsults nre not shown in tlic clingram, it wns fount1 tlint tlicsc lines wcrc all 'cry licarly pnrnllcl. This woold inclicntc tlint the sninc general Inw npplics to nll ltintls of m t c r . Tlic ciirvcs liavc bccn rcrifictl nbovc 100" C. by tests on stcniii-gcncrntors undcr prcssiirc.
Figurc 3 sliow n scction of n 6000 1;~. generator, consisting of n vcrticnl cylindrical tniilr with t i n extension nt the bottoin. Tlie
Electric Stenm
Tlirrc-plinsc siiiglc F l l l . 2 ii1q)cr part is fliingetl, and to i t is bolted n clislicd c o \ w wliich contnins tlircc opcnings for tlic porcclnin bushings that insulnto tho tlircc c o p l ~r coiiductors Ictidiiig to tlic electrodes.
Tlic insulntor bushing consists of tlircc pnrts : two corrugntcd rjlccvcs, om of whicli is outsiclo tint1 tlic otlicr insidc tlic tank, n n d i~ tube insidc tlicso slceves, tlic wholc being I~cld togctlicr by .the sliouldcr ttnd nut of tliu conductor pnssing tlirougli. Tlio arrnngcnicnt slio\vn in Pig. 3 is for 1300 a~ii~)s., 2200 volts, 3-plinsc, 60 cyclcs, iind for (I \vorIiiIig prcsst1ro of 165 Ib. pcr sq. in. ; tlic clcctric current pnsscs tlirougli from both sitlcs of tlic electrode to tlio insidc rind outsidc cylindors, aild to a much siiinllcr c*stciit dircctly fro111 clcctrode to clcctrodc.
This type of gcnertLtor rcquircs but little floor spncc ; tlio 5OOO Irw. gcncrator with clcctric control npparntus can cusily bo pbccd in an iircu 10 x 12 ft., and tho 18,000 kw. ge~~orator, cquiil to 1800 boilor Iiorso-power, with nll its accessories, iiceds n floor space of tllJOllt 15 x 22 ft., nnd s head-room of 25 ft. for cnsc in dismantling.