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Electrical safety device
This invention consists of an electrical safety device for use in power tools that is designed to automatically discontinue operation of the power tool upon physical contact of the tool with a concealed conductive material. A step down transformer is used to supply the operating power for a disconnect relay and reset delay. When physical contact is made between the power tool and the conductive material, an electrical circuit through the disconnect relay is completed and the operation of the power tool is automatically interrupted. Once the contact between the tool and conductive material is broken, the power tool can be quickly and easily reactivated by a reset push button activating the reset relay. A remote reset is provided for convenience and efficiency of operation.
Date:
September 6, 1990
Creator:
White, D. B.
System:
The UNT Digital Library
Automobile Attachment.
Patent for an automobile floorboard attachment for closure of clutch pedal openings, keeping the motor's heat from passing through.
Date:
September 6, 1921
Creator:
Sears, Joseph M.
System:
The Portal to Texas History
Carbureter
Patent for a carburetor. This carburetor is designed to be used with crude oil, and to be easily constructed and operated.
Date:
September 6, 1921
Creator:
Walker, Sanders
System:
The Portal to Texas History
Detachable Inside Door-Lock.
Patent for a detachable inside door-lock. This is a simple locking device that can be applied and removed from any type of door. The purpose is to make a room private and burglar proof.
Date:
September 6, 1921
Creator:
Arledge, Elbert H.
System:
The Portal to Texas History
Fiber Extracting Machine
Patent for "new and improved Fiber-Extracting Machine." (6-7). These improvements are specific to equipment used to separate fibers from vegetable and plant matter. The primary function of this equipment is to extract fiber from the agave plant.
Date:
September 6, 1921
Creator:
Lambert, William O.
System:
The Portal to Texas History
Resilient Hub for Wheels.
Patent for an improved version of the Resilient Hub for Wheels, including illustrations. This design is more practical and efficient, as it eliminates the need for a pneumatic tire; rubber can be utilized instead.
Date:
September 6, 1921
Creator:
Wright, Thomas M.
System:
The Portal to Texas History
Shipping-Basket
Patent for a shipping basket designed to keep contents secure and undamaged.
Date:
September 6, 1921
Creator:
Pitts, William L.
System:
The Portal to Texas History
Showcase or Screen.
Patent for a cabinet that holds pictures that are easily viewable and free from dust and debris. There is one movable side for storing and removing the photos, with the remainder of the cabinet staying immobile.
Date:
September 6, 1921
Creator:
Praytor, William B.
System:
The Portal to Texas History
Switch.
Patent for an electric switch that is used in conjunction with a signaling device that allows for lights to be activated synchronously or asynchronously via the use of two levers.
Date:
September 6, 1921
Creator:
Riggs, Fletcher S.
System:
The Portal to Texas History
Waiterless Restaurant
Patent for a waiterless restaurant design with electrically operated waiters.
Date:
September 6, 1921
Creator:
Paul, Charles P.
System:
The Portal to Texas History
Combination Fence and Repair Tool
Patent for a multi-purpose tool related to working with wires in and around the home. It is intended to tighten, twist, and/or sever a wire.
Date:
September 6, 1917
Creator:
Grogan, Edward W.
System:
The Portal to Texas History
Broiler
Patent for a broiler. Illustrations included.
Date:
September 6, 1910
Creator:
Rape, William F.
System:
The Portal to Texas History
Car Door
Patent for a car-door. The design is to prevent rattling and reduce wear on rail car doors. Illustration included.
Date:
September 6, 1910
Creator:
Lott, Andrew Gains & Handley, John A., Jr.
System:
The Portal to Texas History
Coin Controlled Machine
Patent for a coin controlled machine. This invention is designed to accept coins of proper values and operation is dependent on predetermined portion of the im pressed surface of the coin. Illustrations included.
Date:
September 6, 1910
Creator:
Scheble, Eugene S. & Rast, Felix Q.
System:
The Portal to Texas History
Cotton Chopper
Patent for a cotton chopper. Illustration included.
Date:
September 6, 1910
Creator:
Weber, Charles Wile
System:
The Portal to Texas History
Cotton-Picking Machine
Patent for a cotton picking machine. Illustrations included.
Date:
September 6, 1910
Creator:
Stoops, Harry James
System:
The Portal to Texas History
Hose-Coupling
Patent for a coupling for fire hoses. Illustrations included.
Date:
September 6, 1910
Creator:
Stephens, John H.
System:
The Portal to Texas History
Indicator or Bulletin
Patent for a bulletin that can be used in street cars to display station or street names. Illustrations included.
Date:
September 6, 1910
Creator:
Barnes, Ned E.
System:
The Portal to Texas History
Nut-Lock
Patent for a nut lock. Illustrations included.
Date:
September 6, 1910
Creator:
Lance, Andrew M.
System:
The Portal to Texas History
Oil Burner
Patent for a class of oil burners to be used with stoves. Illustration included.
Date:
September 6, 1910
Creator:
Mitchell, Cliff W.
System:
The Portal to Texas History
Spring-Motor
Patent for spring motors that can be adapted to rotary fans and sewing machines. Illustrations included.
Date:
September 6, 1910
Creator:
Seeders, Zephaniah C.
System:
The Portal to Texas History
Vending Apparatus
Patent for a vending machine for postage supplies. Illustrations included.
Date:
September 6, 1910
Creator:
Harris, Irvin F.
System:
The Portal to Texas History
Artificial Tooth
Patent for an artificial tooth to a gold bridge. Illustration included.
Date:
September 6, 1904
Creator:
Priest, Frank L.
System:
The Portal to Texas History
Attachment For Surveying Instruments
Patent for attachment for surveying instruments. Illustrations included.
Date:
September 6, 1904
Creator:
Armstrong, Edward R.
System:
The Portal to Texas History