File:Pacific Gas and Electric magazine (1914) (14802308793).jpg

Identifier: pacificgaselectr61915paci (find matches)
Title: Pacific Gas and Electric magazine
Year: 1909 (1900s)
Authors: Pacific Gas and Electric Company
Subjects: Pacific Gas and Electric Company Electric utilities Public utilities
Publisher: (San Francisco, Calif.) : Pacific Gas and Electric Co.
Contributing Library: San Francisco Public Library
Digitizing Sponsor: San Francisco Public Library

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andthe movement between the four points ofthe compass is controlled by a weightedfriction clutch on the main shaft. Theturntable weighs 12 tons; hub, shaft andbevel gear 18 tons; the vertical 5 trans-mission shaft through five floors and foursolid couplings 6.5 tons, revolving on aball-bearing immersed in oil. Operating in mesh witli the bevel gear Pacific Service Magazine 249 at the foot of the shaft re-volve two bevel gears on theends of shafts connected toadjustable cone-shaped pulleys(in two parts), belt-connectedto the gear shaft, meshed tothe gears on the pumps. Thetransmission belt is made upof sections (two pieces ofwood 14x3i/2xl% boltedtogether with leather belt be-tween), the friction powerbeing taken from the ends ofthe same on the cone pulleys.By operating a cleaver-screwhand-device, at the same timethat the driver cone pulley isseparated (lessening the pulleydiameter) the driven cone pul-lej is drawn together, therebyadjusting the speed to thevelocity of the wind. Bevond
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250 Pacific Service Magazine the limit of the adjusting device the sailson the arms must be shortened, allowingthe wind to go through the lattice workof the frame. In Holland, shutters takethe place of sails and can be automati-cally opened or closed as the velocity ofthe wind requires. The pumping equipment consists oftwo Dow Vertical Triplex Power Pumps,8x 10 plungers, three stage and 45R. P. M. with 6.53 G. P. R. The capacityof the mill with wind power is limited to80 lbs. pressure, and with developmentof Lincoln Park a pressure of 180 pounds(corresponding to approximately a headof 400 feet) was needed, necessitatingadditional power. For this purpose, thePacific Gas and Electric Company in-stalled a 60 horse-power G. E. 2,200 volt2-phase 900 R. P. M. motor for eachpump, thereby giving sufficient power toaccommodate the limit in capacity of themachinery installed. With a rawhideshrouded pinion on the motor for directconnection, the motor by one screw onthe base may mesh with the gea

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