Manufacturers Index - Hart Emery Wheel Co., Ltd.
Hart Emery Wheel Co., Ltd.
Hamilton, ON, Canada
Manufacturer Class:
Metal Working Machinery
This page contains information on patents issued to this manufacturer.
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201,778
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Mar. 26, 1878
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Emery Wheel
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Gilbert Hart |
Detroit, MI |
James L. Norris - patent attorney
This grinding wheel was advertised in the 1895 catalog from Charles A. Strelinger of Detroit, MI.
Hart Emery Wheel Co. changed its name to Detroit Emery Wheel Co. about 1878.
Claim:
"It is well known to all users of this class of grinding and polishing wheels that, in order to work them with the best effect and greatest economy, they must be run at high speed; and, when thus used, they are, even when great care and skill are exercised, more or less liable to break and fly off from their exes, as when a breakage occurs the fragments of the wheel are scattered with great violence, frequently fatally wounding the operator and others in the vicinity, and destroying property..."
The invention consisted of a grinding wheel with a web of metal metal wire embedded within it. |
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9,096
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Aug. 06, 1878
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Improvements on emery wheels
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Gilbert Hart |
Detroit, MI |
This patent appears to be, roughly, the Canadian equivalent of US patent 226,066, which dates from nearly two years later. |
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226,066
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Mar. 30, 1880
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Emery-wheel
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Gilbert Hart |
Detroit, MI |
The invention consists of a grinding wheel with short lengths of metal wire admixed, which improved the strength of the wheel. |
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275,561
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Apr. 10, 1883
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Polishing or buffing wheel
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Simon T. Wray |
Buffalo, NY |
The invention consists of a grinding wheel made of compressed layers of stiff cardboard, to which sandpaper can be glued. "Wray's Patent Paper Wheels" are featured in an 1887 catalog from Hart Emery Wheel Company of Hamilton, Ontario. |
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338,787
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Mar. 30, 1886
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Saw-filing machine
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Samuel C. Rogers |
ON, Canada |
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RE10,937
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Jun. 05, 1888
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Saw-filing machine
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Samuel C. Rogers |
ON, Canada |
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71,002
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Apr. 16, 1901
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Emery wheel chuck
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Gilbert Hart |
Detroit, MI |
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91,883
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Feb. 28, 1905
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Grinding wheel
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Gilbert Hart |
Detroit, MI |
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102,411
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Dec. 04, 1906
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Grinding wheel
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Gilbert Hart |
Detroit, MI |
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945,526
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Jan. 04, 1910
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Grinding-wheel
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Gilbert Hart |
Detroit, MI |
Improvements to patents 779,848 and 825,460, to more securely lock the wheel segments together to reduce the risk of wheel bursting. |
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1,254,183
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Jan. 22, 1918
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Machine to Mold Emery Wheels
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James Fleming Williams |
ON, Canada |
H. J. S. Dennison - patent attorney |
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