Railways – Traction – Cable
Patent
1977-11-14
1984-09-11
Reese, Randolph
Railways
Traction
Cable
104117, 104178, 187 22, 198813, 242147R, 254277, 254392, 474110, B61B 1200
Patent
active
044703554
ABSTRACT:
A cable tensioning apparatus and method for automatically maintaining and adjusting the tension forces in an endless cable for a ski lift, aerial tramway, etc. is disclosed. The apparatus includes a carriage on which the cable is carried, a pneumatic carriage displacement apparatus in the form of a piston and cylinder, a source of gas under pressure, and a regulator and relief valve connected to establish and maintain a pressure within the cylinder which falls between predetermined minimum and maximum pressures. As the aerial tramway is subject to passenger or cargo loading and ambient conditions which change the tension forces, the pressure in the pneumatic cylinder will vary within the preselected range, and upon a change in the tension force beyond the range, gas is automatically exhausted from or interjected into the pneumatic cylinder to maintain tension forces within the preselected range.
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Chickering Robert B.
Grunewald Glen R.
Reese Randolph
Warren Manfred M.
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