Letson & Burpee, Ltd. - Assigned Patents

Manufacturers Index - Letson & Burpee, Ltd.

Letson & Burpee, Ltd.
New Westminster, BC; Vancouver, BC, Canada
Manufacturer Class: Wood Working Machinery & Steam and Gas Engines

Patents

This page contains information on patents issued to this manufacturer.

Submitting Patent Information

If you find a patent number or patent date by this manufacturer that is not on this list, please contact the Site Historian.

Key to Links for Patent Information

USPTO = U.S. Patent Office . Images of the actual patent can be viewed on the U.S. Patent Office web site but a special TIFF viewer must be installed with your browser in order properly work. More information on how to configure your computer to view these patents can be found at TIFF image Viewers for Patent Images.
DATAMP = Directory of American Tool And Machinery Patents . A sister site to VintageMachinery.org with information on patents related to machinery and tools. A much easier user interface than the USPTO's for finding information on machinery patents.

Patent Number	Date	Title	Name	City	Description
45,564	Mar. 16, 1894	Can washing machine	Frank Watts Burpee	Bellingham, WA
		Can washing machine	James Moore K. Letson	BC, Canada
60,646	Jul. 19, 1898	Can capping machine	Frank Watts Burpee	BC, Canada	This is a high-speed canning machine that can readily be adapted to various can sizes.
		Can capping machine	James Moore K. Letson	BC, Canada
63,240	Jun. 10, 1899	Fish cutting machine	James Moore K. Letson	BC, Canada	This machine is for "splitting or dividing fish and also for cutting the fish transversely after being split, into the proper dimensions for being adequately filled into cans, in which receptacles for holding the fish are arranged on an endless bed or belts, taking over a suitable bed beneath revolving cutting-discs..."
		Fish cutting machine	Frank Watts Burpee	BC, Canada
629,574	Jul. 25, 1899	Can-capping machine	Frank Watts Burpee	BC, Canada
		Can-capping machine	James Moore K. Letson	BC, Canada
645,862	Mar. 20, 1900	Fish-cutting machine	Frank Watts Burpee	Bellingham, WA
		Fish-cutting machine	James Moore K. Letson	BC, Canada
69,208	Oct. 31, 1900	Shield for fish or meat can	Frank Watts Burpee	BC, Canada	This patent makes apparent that cans were, at the time, more complicated than they are now: they had an inner cap that contained a vent to let out steam during cooking, and a shield, or small additional piece of metal that covered the vent during cooking but still allowed steam to escape. An outer can-top was applied as soon as cooking was completed. The shield was made of scrap tin; this patent added a pair of small V-cuts to the shield and the resulting pair of small triangular sections were folded down to provide points that pierced the inner vent-cap and held the shield in place over the vent.
		Shield for fish or meat can	James Moore K. Letson	BC, Canada
74,214	Dec. 24, 1901	Soldering machine	Frank Watts Burpee	BC, Canad
		Soldering machine	James Moore K. Letson	BC, Canada
75,325	Apr. 01, 1902	Closed retort for treating canned material	James Moore K. Letson	BC, Canada
		Closed retort for treating canned material	Frank Watts Burpee	BC, Canada
697,345	Apr. 08, 1902	Soldering-machine	Frank Watts Burpee	Bellingham, WA
		Soldering-machine	James Moore K. Letson	BC, Canada
77,231	Sep. 02, 1902	Closure for retorts	Frank Watts Burpee	BC, Canada
		Closure for retorts	James Moore K. Letson	BC, Canada
710,476	Oct. 07, 1902	Closure for retorts	Frank Watts Burpee	Bellingham, WA
		Closure for retorts	James Moore K. Letson	BC, Canada
84,949	Jan. 19, 1904	Shingle making machine	Frank Watts Burpee	Fairhaven, WA	This is an upright-style shingle machine with quick blade return.
760,610	May. 24, 1904	Shingle-machine	Frank Watts Burpee	Fairhaven, WA	Subsequently improved in patent 864,750.
92,344	Mar. 28, 1905	Machine for sawing shingles	Frank Watts Burpee	Bellingham, WA
94,206	Jul. 18, 1905	Can salting machine	Frank Watts Burpee	Bellingham, WA
97,694	Feb. 27, 1906	Shingle making machine	Frank Watts Burpee	BC, Canada
854,075	May. 21, 1907	Can-salting machine	Frank Watts Burpee	Bellingham, WA
864,750	Aug. 27, 1907	Shingle-machine	Frank Watts Burpee	BC, Canada	Improvements to patent 760,610.
163,000	Jun. 08, 1915	Conveyer	Frank Watts Burpee	Bellingham, WA
163,594	Jul. 06, 1915	Retort for heating cans	David A. McIntosh	BC, Canada
1,151,111	Aug. 24, 1915	Can-heating retort	David A. McIntosh	BC, Canada
169,296	May. 09, 1916	Can cover seaming machine	Frank Watts Burpee	South Bellingham, WA
171,446	Aug. 22, 1916	Can seaming machine	Frank Watts Burpee	Bellingham, WA
1,224,445	May. 01, 1917	Conveyer	Frank Watts Burpee	Bellingham, WA
184,757	Jun. 04, 1918	Can opener	Frank Watts Burpee	Bellingham, WA
185,980	Aug. 06, 1918	Flanger for cans	Frank Watts Burpee	Bellingham, WA
1,289,111	Dec. 31, 1918	Flanging device for can-bodies	Frank Watts Burpee	Bellingham, WA
1,289,645	Dec. 31, 1918	Can-opener	Frank Watts Burpee	Bellingham, WA
188,532	Feb. 04, 1919	Can seaming machine	John H. Burpee	South Bellingham, WA	Frank W. Burpee is described as an inventor, and the other two patentees are described as machinists.
		Can seaming machine	Frank Watts Burpee	Bellingham, WA
		Can seaming machine	Clarence B. Burpee	South Bellingham, WA
1,293,694	Feb. 11, 1919	Can-seaming machine	John H. Burpee	South Bellingham, WA
		Can-seaming machine	Frank Watts Burpee	Bellingham, WA
		Can-seaming machine	Clarence B. Burpee	South Bellingham, WA
208,000	Jan. 25, 1921	Oscillating clutch	David A. McIntosh	BC, Canada	Patentees Bandy and McIntosh are described as machinist and Manager of Engineering Works, respectively.
		Oscillating clutch	William Bandy	BC, Canada
218,954	May. 23, 1922	Intermittent feed clutch	William Bandy	BC, Canada
237,454	Jan. 29, 1924	Can seaming machine	Frank Watts Burpee	Bellingham, WA
255,782	Nov. 24, 1925	Shingle machine set work	David A. McIntosh	BC, Canada
259,204	Mar. 23, 1926	Feed clutch	William H. Porter	BC, Canada
273,212	Aug. 16, 1927	Feed clutch	William H. Porter	BC, Canada
286,312	Jan. 08, 1929	Derrick conveyer	Gordon McIntosh Letson	BC, Canada
		Derrick conveyer	David A. McIntosh	BC, Canada
384,801	Oct. 24, 1939	Can weighing machine	Dennis William Brookes	BC, Canada
		Can weighing machine	Gordon MacIntosh Letson	BC, Canada
612,214	Jan. 10, 1961	Split mitre gear	Herbert M. Schmelcher	BC, Canada	Roll case miter gears take heavy intermittent loads even though they are "only" driven by 20 HP or so. The gears frequently need to be replaced so split gears are commonly used to avoid the need to dismantle the shaft assembly. This invention provides a design for a split gear that maximizes strength while being easy to manufacture.
690,774	Jul. 14, 1964	Conveyer flight	Roy D. Batt	BC, CA
691,591	Jul. 28, 1964	Load moving structure	Robert A. Baldrey	BC, Canada
702,764	Jan. 26, 1965	Chain connecting conveyer chair	Roy D. Batt	BC, CA
724,966	Jan. 04, 1966	Saw feeding machine	Francis Edwin Allen	BC, Canada
3,356,205	Dec. 05, 1967	Log conveyor	George W. Mcleod	BC, Canada
3,367,479	Feb. 06, 1968	Impact absorbing apparatus	Robert Alexander Baldrey	BC, Canada	The invention is an elastomeric coupling between a log feed roll and its shaft. The idea itself was not new and the real innovation is the shape of the annular insert which is claimed to sufficiently absorb heavy impacts while having sufficient shear strength and torsional rigidity. Providing such a shock absorber prevents bearing damage and allows the roll-case frame to be welded directly to the floor which avoids misalignment problems.
		Impact absorbing apparatus	Gordon McIntosh Letson	BC, Canada
810,994	Apr. 22, 1969	Log conveyor	George W. Mcleod	BC, Canada
834,556	Feb. 17, 1970	Impact absorbing conveyor roll	Robert A. Baldrey	BC, Canada
		Impact absorbing conveyor roll	Gordon McIntosh Letson	BC, Canada
837,428	Mar. 24, 1970	Grinder feed carriage	Robert A. Baldrey	BC, Canada
895,668	Mar. 21, 1972	Bandmill arbor tilting mechanism	Francis Edwin Allen	BC, Canada
920,480	Feb. 06, 1973	Band mill	Francis Edwin Allen	BC, Canada
944,712	Apr. 02, 1974	Log feed conveyor for bandmill	Francis Edwin Allen	BC, Canada
3,827,324	Aug. 06, 1974	Crowder roll arm for bandmill	Francis Edwin Allen	BC, Canada
3,838,620	Oct. 01, 1974	Air strain mechanism for bandmill	Francis Edwin Allen	BC, Canada
		Air strain mechanism for bandmill	Robert Alexander Baldrey	BC, Canada
958,626	Dec. 03, 1974	Crowder roll arm for bandmill	Francis Edwin Allen	BC, Canada
4,610,772	Dec. 12, 1974	Shear blade	Francis Edwin Allen	BC, Canada	This invention relates to a twin bandmill and is intended to saw flitches or cants with opposing sawn faces kept parallel within tight limits. It uses a "shear blade", a sort of elongated splitter that is intended to hold the log or cant at a fixed position relative to the axis of the blade. Otherwise, the cutting forces tend to cause the log to rotate while being cut which leads to helical cut surfaces and is called "Propellering".
3,946,634	Mar. 30, 1976	Band mill strain mechanism	Francis Edwin Allen	BC, Canada
		Band mill strain mechanism	James Daniel McGuire	BC, Canada
7,407,542	Jul. 06, 1976	Monitor de tensao cilindrica para lamina de serra	Andrew Wilkinson Porter	BC, Canada
		Monitor de tensao cilindrica para lamina de serra	Francis Edwin Allen	BC, Canada
994,215	Aug. 03, 1976	Air strain mechanism for bandmill	Francis Edwin Allen	BC, Canada
		Air strain mechanism for bandmill	Robert A. Baldrey	BC, Canada
1,003,308	Jan. 11, 1977	Automatic roll tensioning method and apparatus	Francis Edwin Allen	BC, Canada
		Automatic roll tensioning method and apparatus	Andrew Wilkinson Porter	BC, Canada
8,732,675	Jan. 25, 1979	Automatic roll tensioning method and apparatus	Andrew Wilkinson Porter	BC, Canada
		Automatic roll tensioning method and apparatus	Francis Edwin Allen	BC, Canada
1,049,377	Feb. 27, 1979	Bandmill strain mechanism	Francis Edwin Allen	BC, Canada
		Bandmill strain mechanism	James Daniel McGuire	BC, Canada