US Patent: 971,219
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| Variable Speed Mechanism
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Patentee:
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| Herman W. Schatz (exact or similar names) - Cincinnati, Hamilton County, OH |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Sep. 11, 1909 |
| Granted: |
Sep. 27, 1910 |
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Joel Havens
"Vintage Machinery" entry for American Tool Works Co.
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Description: |
| Claim:
In a variable speed device a pair of shafts, a step-pulley fixed to each shaft, a belt for transmitting motion between such pulleys, a pair of belt-shifters slidably mounted for shifting the belt laterally, a rotatable cylindrical cam having a groove partly annular and partly helical, means carried by said shifters engaging into said groove, a belt tightening roller intermediate of said pulleys, and means for moving said roller to and from the belt during a belt-shifting operation, in driven connection with said cam. |
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