Ashcroft Mfg. Co. - Assigned Patents

Manufacturers Index - Ashcroft Mfg. Co.

Ashcroft Mfg. Co.
Boston, MA; Bridgeport, CT; Stratford, CT, U.S.A.
Company Website: http://www.ashcroft.com/
Manufacturer Class: Steam and Gas Engines

Patents

This page contains information on patents issued to this manufacturer.

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Patent Number	Date	Title	Name	City	Description
22,157	Nov. 30, 1858	Wrench	James R. Brown	Boston, MA	Brown's patent pipe tongs had the fulcrum point in a block which could be moved by an adjusting screw. Brown's Pipe Tongs (with later refinements) was a "staple" tool for plumbers etc. for decades. Late 19th & early 20th Century catalog illustrations show a patent extension dated Nov. 30, 1872 -- the Patent Gazette notes it Nov. 19, 1872, antedated to Jan. 10, 1872). Brown patented an "improvement" on July 7, 1868 (Pat. No. 79,724). Brown became insolvent in 1860; Edward H. Ashcroft subsequently acquired rights to the Brown patent, and filed suit against J.J. Walworth Co., which had a competing claim to the rights and had been marketing Brown's pipe tongs. Ashcroft won the suit [Ashcroft v. Walworth (1872)]. Ashcroft registered his "arm & hammer over the initials EHA" trade mark for the tongs Nov. 7, 1876 {trade mark no. 4102).
28,328	May. 15, 1860	Hand-drill	James H. Parker	Boston, MA
46,981	Mar. 28, 1865	Improved ratchet-drill	Edward H. Ashcroft	Lynn, MA	Improvements to Henry H. Packer's patent 20,728 and Henry Getty's patent 43,109. See also patent 28,328.
3,964	Oct. 16, 1874	Safety Valve	Edward Halliday Ashcroft	Lynn, Essex County, MA
210,643	Dec. 10, 1878	Indicator for Steam Engines, &c.	Harris Tabor	Corning, Steuben County, NY
282,931	Aug. 07, 1883	Scale for Steam Engine Indicators	James W. See	Hamilton, Butler County, OH
292,169	Jan. 22, 1884	Pressure Gage	William H. MacGregor	East Braintree, Norfolk County, MA
295,694	Mar. 25, 1884	Ratchet-drill	John H. Vinton	Boston, MA
427,044	May. 06, 1890	Steam Engine Indicator	Almon B. Calkins	Bridgeport, Fairfield County, CT
494,482	Mar. 28, 1893	Attachment for Steam Indicators	William Houghtaling	Bridgeport, Fairfield County, CT
533,812	Feb. 05, 1895	Steam Engine Indicator	William Houghtaling	Bridgeport, Fairfield County, CT	Application renewed, 20 Jul 1894.
538,042	Apr. 23, 1895	Steam Engine Indicator	William Houghtaling	Bridgeport, Fairfield County, CT	Patented in England, 20 Feb 1894, #3627.
538,043	Apr. 23, 1895	Steam Engine Indicator	William Houghtaling	Bridgeport, Fairfield County, CT	Patented in England, 20 Feb 1894, #3627.
646,700	Apr. 03, 1900	Steam Engine Indicator	William Houghtaling	Bridgeport, Fairfield County, CT
963,986	Jul. 12, 1910	Combination drill and valve-grinder	Frederick C. Blanchard	Bridgeport, CT	Blanchard describes his invention as a combination breast drill, reversible ratchet drill and valve grinder. I have one of these combo drills. It is the smoothest operating breast drill I have.
1,828,633	Oct. 20, 1931	Injector for Feeding Water to Steam Boilers	Belvin T. Williston	Somerville, Middlesex County, MA	Patented in Canada, patent #325,726.
		Injector for Feeding Water to Steam Boilers	Frederick W. Walch	Somerville, Middlesex County, MA
		Injector for Feeding Water to Steam Boilers	Chauncey D. Allen	Philadelphia, PA