Thomas Elevator Co. - Assigned Patents

Manufacturers Index - Thomas Elevator Co.

Thomas Elevator Co.
Chicago, IL, U.S.A.
Manufacturer Class: 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
736,572	Aug. 18, 1903	Hoisting-machine	Wendell A. Barker	Chicago, IL
787,609	Apr. 18, 1905	Hoisting-machine	Wendell A. Barker	Chicago, IL	This patent relates to hoists with "an electrically-driven winding-drum which may be positively rotated or held stationary when desirable or necessary; and my invention has for its object to provide an improved machine of this character wherein the starting and stopping of the winding-drum may be independent of the starting and stopping of the motor..."
843,253	Feb. 05, 1907	Friction-lock	Wendell A. Barker	Chicago, IL	This patent covers a mechanism to prevent a motor vehicle from swerving when one of the front wheels hits an obstacle or irregularity. The inventor worked for Thomas Elevator Co., which would manufacture an ingenious lathe chuck that he would develop.
111,141	Mar. 31, 1908	Friction lock	Wendell A. Barker	Chicago, IL	This is the Canadian equivalent of US patent 843,253.
983,668	Feb. 07, 1911	Friction-brake mechanism	Wendell A. Barker	Chicago, IL
1,022,349	Apr. 02, 1912	Multiple hoist	Wendell A. Barker	Chicago, IL
1,033,776	Jul. 30, 1912	Mechanical movement	Wendell A. Barker	Chicago, IL	The mechanical movement is a linkage to connect a rotary shaft to a gear or clutch while allowing an angular advancing or retarding of their relative positions. It was primarily designed for use with a hoist to apply a friction band to the winding drum, but other applications were possible, such as to allow gears to be aligned for meshing before a clutch was released.
145,032	Dec. 31, 1912	Mechanical movement	Wendell A. Barker	Chicago, IL	This is the Canadian equivalent of US patent 1,033,776.
1,054,666	Mar. 04, 1913	Clutch mechanism	Wendell A. Barker	Chicago, IL
1,141,679	Jun. 01, 1915	Electrically-driven hoist	Wendell A. Barker	Chicago, IL
1,144,094	Jun. 22, 1915	Water-circulation system for subways	Wendell A. Barker	Chicago, IL
1,155,784	Oct. 05, 1915	Hoisting-machine	Wendell A. Barker	Chicago, IL
1,178,702	Apr. 11, 1916	Mechanical movement	Wendell A. Barker	Chicago, IL
1,249,300	Dec. 11, 1917	Chuck	Wendell A. Barker	Chicago, Cook County, IL	Claim: In a chuck, the combination of a rotatable chuck body, jaws movable radially therein, levers pivoted on said chuck body and connected to said jaws, means concentric with said body and normally rotating at the same speed and in the same direction with the latter for actuating said levers, and means for rotating said lever-actuating means relatively to said body while the latter is rotating, to effect actuation of said levers.
189,240	Mar. 25, 1919	Chuck for lathes	Wendell A. Barker	Chicago, IL	This is the Canadian equivalent of US patent 1,249,300.
1,373,789	Apr. 05, 1921	Revolving-jaw chuck	Wendell A. Barker	Elkhart, IN
1,389,731	Sep. 06, 1921	Chuck	Wendell A. Barker	Elkhart, IN	Improvements to patent 1,249,300.
1,509,510	Sep. 23, 1924	Chuck	Ellswoorth J. Hanna	Chicago, Cook County, IL	Claim: In a chuck, a hub having grooves in one face, jaw member supported in said grooves, studs projecting from the rear face of said jaws, rollers mounted upon said studs, a cam gear rotatably mounted upon said hub and having ,a cam groove for receiving said rollers, a huh gear keyed upon said hub, adjacent said cam gear and provided with a bearing, a rotatable ring gear supported upon said bearing, and provided with interior teeth, a stationary gear having internal teeth secured adjacent the inner side of said ring gear, and a rotatable spider having planet gears mounted upon said hub, the planet gears meshing with the fore-mentioned gears.