US Patent: 2,604,794
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| Belt Tensioning Device for Variable Speed Drives
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Patentee:
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| Frederick B. Scott (exact or similar names) - Syracuse, Onondaga County, NY |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Jan. 15, 1948 |
| Granted: |
Jul. 29, 1952 |
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Patent Pictures:
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Joel Havens
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Description: |
| Abstract:
The invention relates to new and useful improvements in a belt tensioning device for a variable speed drive and more particularly to a belt tensioning device for variable pitch sheaves or pulleys in single or multiple strand. An object of the invention is to provide a mechanism whereby the shiftable members of a belt driven variable pitch drive can be simultaneously moved toward or from their associated members for increasing or decreasing tension on the driving belt. A further object of the invention is to provide a mechanism of the above type wherein the shiftable members may also be simultaneously moved one toward and the other away from their associated members for varying the speed of the driven member. A further object of the invention is to provide a mechanism of the above type for varying the speed of the driven belt and for varying the tension on the belt wherein the desired adjustments maybe made. without stopping the driving unit. A still further object of the invention is to provide a mechanism of the above type wherein the shiftable members of a belt driven variable pitch drive may be independently moved toward or from its associated member to facilitate the replacement of the driving belt.
Claim:
A variable pitch sheave drive comprising a driving shaft and a driven shaft each carrying a variable pitch sheave, a belt cooperating with said sheaves for transmitting motion from one to the other, a stub shaft associated with each sheave and operating when turned to increase or decrease the pitch of the sheave with which it is associated, a manually actuated sheave adjusting shaft, devices for rotatively connecting said adjusting shaft to one of said stub shafts, a reversible transmission gear train actuated by said adjusting shaft, and devices connecting said gear train to said other stub shaft whereby the stub shafts may be simultaneously rotated-in opposite directions by said adjusting shaft. |
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