J. P. Grosvenor - Assigned Patents | VintageMachinery.org

Manufacturers Index - J. P. Grosvenor

J. P. Grosvenor
Lowell, MA, U.S.A.
Manufacturer Class: Wood Working Machinery

Patents

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Patent Number	Date	Title	Name	City	Description
16,144	Dec. 02, 1856	Method of clamping cutters in cutter-heads for planing-machines	Jonathan P. Grosvenor	Lowell, MA	"My improvements are particularly applicable to the machine for cutting moldings for which Letters Patent were granted to Nathaniel Gear on the 8th of November 1853..." (patent 10,204) According to the 1873 "Subject-matter index of patents for inventions issued by the United States Patent Office", this patent was granted an extension.
20,345	May. 25, 1858	Cutter-head and table-rest for cutting irregular forms	Jonathan P. Grosvenor	Lowell, MA	This machine is designed for molding compound-curved work-pieces. A first-aid course should be mandatory.
26,584	Dec. 27, 1859	Machine for planing curved surfaces	J. P. Grosvenor	Lowell, MA	"A new and Improved Machine for Cutting Out and Forming Moldings on Circular, Elliptical, and Sinuous Forms..."
77,606	May. 05, 1868	Improvement in sawing-machines	Jonathan P. Grosvenor	Lowell, MA	This appears to be the first commercially-available tilting-arbor tablesaw, as evidenced by ads in Scientific American and Manufacturer & Builder. See also patent 96,224. The innovations are a sliding journal-box for the saw-arbor, which moves to adjust the depth of cut; and a miter gauge that flips up into position, or down out of the way.
81,997	Sep. 08, 1868	Improvement in moulding-machines	Jonathan P. Grosvenor	Lowell, MA	"Machine for Planing and Moulding Irregular Forms".
82,113	Sep. 15, 1868	Improvement in machines for planing and moulding	Jonathan P. Grosvenor	Lowell, MA
96,224	Oct. 26, 1869	Improvement in method of adjusting circular saws	Jonathan P. Grosvenor	Lowell, MA	An improvement on the inventor's patent 77,606 and patent 82,113. "The object of this invention is to obtain in mitering-machines, having a circular saw, a more simple, cheap, and perfectly-operating device for adjusting the saw, while keeping the belt taut at all times, and the table level and of uniform height."
RE4,763	Feb. 20, 1872	Improvement in circular-saw mills	Jonathan P. Grosvenor	Lowell, MA	An early tilting-arbor tablesaw design. The design is an improvement on Grosvenor's patent 77,606 and patent 82,113; the difference in this new design is the blade elevation mechanism. The saw arbor is suspended independently on the two ends, and so the blade can be tilted in either direction; the blade must be moved from one end of the arbor to the other when tilting in the opposite direction.
125,388	Apr. 09, 1872	Improvement in loose pulleys	Jonathan P. Grosvenor	Lowell, MA	"My invention relates to the construction, inside a loose pulley, of a reservoir for oil or other lubricant, so that the oil will not escape from the pulley while stationary, and while revolving is kept within the pulley and constantly applied to all parts of the bearing by the motion of the pulley."
RE5,721	Jan. 06, 1874	Improvement in machines for cutting irregular forms	Jonathan P. Grosvenor	Lowell, MA	Extended 7 years.
152,364	Jun. 23, 1874	Improvement in hand-planers	Jonathan P. Grosvenor	Lowell, MA	This invention is for the use of an inclined wedge-shaped bed for the infeed table of a jointer. This seems to be the first appearance of a wedge-bed design. The patent disclaims (i.e., acknowledges the primacy of) Climer and Riley's patent 59,966 and Frank Douglas's patent 105,657.