GB Patent: GB-187,001,066
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| Improvements in vertical saw frames
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Patentee:
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| William Blackett Haigh (exact or similar names) - Oldham, England |
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Patent Dates:
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| Granted: |
Apr. 12, 1870 |
Espacenet patent
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Jeff Joslin
"Vintage Machinery" entry for W. B. Haigh & Co., Ltd.
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Description: |
| "First, this invention consists in causing the frame which holds the saws to move up and down in grooved or plain steel pulleys adjusted to the frame by set screws for the purpose of enabling the frame and saws to have a greater speed with less friction than heretofore, and thereby obtain a great saving of power in sawing. Secondly, in employing an improved chain feed which consists of several wrought iron dogs to fasten upon the timber to take it up to the saws when cutting ; these dogs have an eccentric lever which is made to take hold and let go the timber at the proper time by stops fixed for the purpose, so as to be self-adjusting. Thirdly, in using an improved disc feed wheel attached to a chain motion for the purpose of varying the speed of feed, or in using a cone wheel pulley worked by a chain for the same purpose. And, fourthly, in balancing the frame for the different numbers of saws by means of water or other liquid, or by shot introduced into a cavity in one of the arms or boss, or rim of the fly wheel or other wheel or pulley upon the crank shaft. The pulleys against which the saw frame work, can also be covered with India rubber or other composition, or they can be made of other metal or hard substance or composition instead of steel." |
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