Journal of electricity, power, and gas . arger motors for mitergate moving, rising stem valves and guard valves, a starting point with resistance in two legs of the three-phase circuitis provided. Location and Operation of Lock Machinery. From an operating standpoint the machinery was placedbelow the coping of the lock walls, thus affording a clearspace for maneuvering ships and protecting the apparatusfrom tfhe weather without erecting numerous houses. The mitering gates consist of two massive leaves pivotedon the lock walls which operate independently of each pair of gates is located
Journal of electricity, power, and gas . arger motors for mitergate moving, rising stem valves and guard valves, a starting point with resistance in two legs of the three-phase circuitis provided. Location and Operation of Lock Machinery. From an operating standpoint the machinery was placedbelow the coping of the lock walls, thus affording a clearspace for maneuvering ships and protecting the apparatusfrom tfhe weather without erecting numerous houses. The mitering gates consist of two massive leaves pivotedon the lock walls which operate independently of each pair of gates is located where each change of level occursand divides the locks into 1000-foot chambers. In additionto these gates, at lake and ocean ends are duplicate pairsof gates used as guard gates. To handle the vessels of vari-ous sizes with the minimum use of water, mitering gates ofthe same description as those above are installed, dividing1000-fcot locks into two compartments. These gates aretermed intermediate mitering gates. When the mitering gates. Instrument and Control Benchboard for GatunHydroelectric Station. are closed they are what might be termed clamped in thisposition by a device called a miter forcing machine. Chain fenders are stretched across the canal in frontof all mitering gates which can be exposed to the upper locklevel and also in front of the guard gates at the lower chains are maintained in a taut position when thegates behind are closed, and are lowered when the gates areopened for the passage of a ship. The chains are raisedand lowered by a method similar to that followed in hy-draulic elevators, with the additional feature that if a shipapproaches the gates at a dangerous speed and rams intothe chain, the chain is paid out in such a way as to grad-ually stop the ship before it reaches the gates. Loweringthe chain for the passage of a vessel and raising it againafter the vessel has passed is accomplished by two motors;one driving the main pump supplying wat
Size: 1382px × 1809px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauth, bookcentury1800, bookdecade1890, booksubjectelectricity
