US Patent: 727,136
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| Elevator Hoisting Mechanism
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Patentee:
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| Thaddeus W. Heermans (exact or similar names) - Chicago, Cook County, IL |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Dec. 04, 1899 |
| Granted: |
May 05, 1903 |
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Patent Pictures:
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Joel Havens
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Description: |
| Abstract:
This invention relates to improvements in frictional hoisting mechanism for elevator-cars, and embraces both an improved variable-speed motor for giving power to operate an elevator-car and an arrangement of the rope connections between said motor and the car for giving variable speed to the car.
Claim:
An elevator apparatus comprising a car and a counterweight, traveling sheaves connected with said car and counterweight, an endless cable trained about said sheaves, two driven wheels around which the endless enable also passes, a single motor arranged to drive both wheels and means for varying the relative speeds of the wheels. |
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