George C. Taft - Assigned Patents | VintageMachinery.org

Manufacturers Index - George C. Taft

George C. Taft
Worcester, MA, U.S.A.
Manufacturer Class: Wood Working Machinery & Metal Working Machinery

Patents

This page contains information on patents issued to this manufacturer.

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Patent Number	Date	Title	Name	City	Description
16,900	Mar. 24, 1857	Metal Drill	George C. Taft	Worcester, MA
17,609	Jun. 16, 1857	Screw Wrench	George C. Taft	Worcester, MA	Double male-threaded "nut" parallel to the shank engages female threads on the inside of the handle ferule and the inside of the adjustable jaw. The specifications differentiate this design from Loring Coes' April 16, 1841 patent 2,054 and Nathan Whipple's May 24, 1854 patent (patent application denied; the patent application including drawing appears in: COLLINS COMPANY vs. LORING COES, et al: Pleadings and Evidence. Boston, 1879). Ken Cope's "American Wrench Makers 1830-1930" identifies the partnership of George C. Taft and John Gleason as producers of this patent, but it was not included in a list of patents Taft "licensed" to Daniel Hawkins, Jr. in 1859.
17,944	Aug. 04, 1857	Self-feeding drill	George C. Taft	Worcester, MA
20,379	May. 25, 1858	Improved Screw-Wrench	George C. Taft	Worcester, MA	Adjusting 'rosette' is threaded to bear against a rack on shank, and has second set of threads engaging threads in the adjustable jaw. In the specifications, Taft distinguishes his patent from Coes' earlier patents 2,054, 9,945 and 11,208, and his own earlier patent 17,609. This patent, along with 23,725 and 23,798 was "licensed" to Daniel Hawkins, Jr. in 1859.
23,725	Apr. 19, 1859	Wrench	George C. Taft	Worcester, MA	"The thumb nut operates a right and left hand screw.." - from a contemporary catalog description. In the specifications it is described as an improvement of Taft's June 16th, 1857 patent No. 17,609. In actual appearance it is an alteration of Taft's May 25, 1858 patent 20,379. The wrench appears in an 1859 hardware catalog as "COE'S NEW PATENT WRENCH," although a July 1859 contract between Taft & D.A. Hawkins included Hawkins' right to produce the wrench (along with 20,379 and 23,798) with royalties to be paid to Taft. No example of the wrench is known to have survived.
23,798	Apr. 26, 1859	Wrench	George C. Taft	Worcester, MA	Taft describes this as an improvement on his May 25, 1858 patent 20,379. The double threading of the adjusting nut would accelerate the adjustment speed, and it travels on a protected shaft extending from the ferule so there is no extended "tail" as in 20,379. Known examples have no visible markings. The patent (along with 20,379 and 23,725 was "licensed" to Daniel Hawkins, Jr. in 1859.
24,247	May. 31, 1859	Manufacturing the Heads and Shanks of Screw Wrenches	George C. Taft	Worcester, MA	The manufacturing process described would produce the head and shank of a monkey wrench by welding two pieces of iron together (Figs. 1- 6) rather than forging the head and shank from a single piece (figs. 7 - 9). Part of the specifications cite the cost savings and gains in strength resulting from the improved process. Wrenches marked with this patent date are part of an evolving design sequence extending over most of the 1850s, and produced by Taft and a sequence of associates at Worcester.
27,320	Feb. 28, 1860	Drill	George C. Taft	Worcester, MA
28,020	Apr. 24, 1860	Letter Copying Press	George C. Taft	Worcester, MA	The key idea in the patent is casting the platten and threaded extension in one piece; the patent claims other details of construction including the socket in the top crossing frame. At various points in his career, Taft manufactured letter copying presses. Patent office rules relating to reissue suggest Taft did not produce a press conforming to this patent at the time of issue. He patented an "improved" letter copy press in 1864 (patent no. 43,266).
30,774	Nov. 27, 1860	Drill Frame	George C. Taft	Worcester, MA
43,372	Jun. 28, 1864	Improvement in drills	George C. Taft	Worcester, MA
72,114	Dec. 10, 1867	Improvement in variable crank for boring-machines	George C. Taft	Worcester, MA
RE3,760	Dec. 14, 1869	Variable crank for boring machine	George C. Taft	Worcester, MA
99,495	Feb. 01, 1870	Improved machine for drilling metals	George C. Taft	Worcester, MA
99,494	Feb. 01, 1870	Improvement in Twine Cutter	George C. Taft	Worcester, MA	A twine or thread cutter designed to clip to one's clothing. The cutting edge is on a spring which insures the thread or twine contacts a sharp edge and is cut.
107,121	Sep. 06, 1870	Nail Extractor	George C. Taft	Worcester, MA	The pinching jaws are adjustable to compensate for wear. This patent indicates the range of George C. Taft's interests. He held several key wrench patents of the mid-19th Century.
113,815	Apr. 18, 1871	Improvement in drilling-machines	George C. Taft	Worcester, MA
RE5,417	May. 20, 1873	Improvement in Letter Copying Presses	George C. Taft	Worcester, MA	In this reissue, the claims focus on two features: the platen with threaded socket extension, and the socket in the overhead frame, which combine to to enclose the operating thread and protect it from gathering dust.
145,975	Dec. 30, 1873	Improvement in nail-extractors	George C. Taft	Worcester, MA
178,204	May. 30, 1876	Copying-Press	George C. Taft	Worcester, MA	Hinged on one edge, with alternative screw or lever clamping provisions for the opposite edge. Both the hinges and clamping mechanism can be adjusted to vary the thickness of the space between the plates.
257,532	May. 09, 1882	Drilling-machine	George C. Taft	Worcester, MA
16,985	Jun. 18, 1883	Improvements in drilling machines	George C. Taft	Worcester, MA	"Self-Feeding" drill with provisions for varying the spindle speed "to meet the exigencies" of the work. The patent corresponds to U.S. patent 257,532; Taft produced these drills at Worcester, Mass.
288,510	Nov. 13, 1883	Drilling Machine	George C. Taft	Worcester, MA
405,210	Jun. 11, 1889	Saw-guide	Alfred Goulding	Worcester, MA