Did You Know...
...that the Eveready Battery began as an invention called the "electric flowerpot," which was a tube with a battery and light bulb inside? The idea was to fasten this gizmo to the side of a flowerpot so it would illuminate the flowers from the bottom. The idea died on the vine and the businessman who licensed the flower pot, Conrad Huber, was left with a pile of useless tubes -- until he found a way to market them as batteries to light the world!
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| Number | Title | Issue Date |
| 7246975 | Hole saw with replaceable cutting tip A device for cutting a hole, such as in sheet metal is provided. The device includes an axially rotatably cylindrical body that is operable with a rotatable drive. A distal end portion of the body includes a replaceable cutting tip and a replaceable pilot. The cutti... | 07/24/2007 |
| 7152380 | Apparatus and method for repairing popped wallboard nails An apparatus and a method for repairing nail pops in a wallboard is disclosed. The apparatus can be placed In a first state in which it acts as a cutting tool and can be used to cut a bore hole into a wallboard to separate a popped nail from the wallboard. The appar... | 12/26/2006 |
| 7147409 | Drill countersink assembly A combination tool for drilling a bore and countersink for that bore includes a countersink member. The countersink member comprises a longitudinal sleeve with a first end and a second end. The sleeve contains a longitudinal bore through the sleeve from the first en... | 12/12/2006 |
| 7090447 | Twist drill for drilling with a countersink cutting arrangement, and a cutting tool with a countersink cutting arrangement, and a cutting-chamfering tool A twist drill or drill/chamfer tool that comprises a drill with a shaft section. The shaft section is provided with a twisted flute and a clamping ring as the retainer of a facing cutter. The clamping ring tubularly encloses the shaft section or the drill shaft and ... | 08/15/2006 |
| 6206616 | Tool and method for cutting a circular opening and retaining the cut portion A tool and method for cutting a circular opening and retaining the cut portion. The tool comprises a shaft having at least one cutting thread and at least one tapping thread, or at least one cutting thread and at least one male screw thread, or only at le... | 03/27/2001 |
| 5649795 | Machine tool A device for performing a plurality of operations on a workpiece has a combination tool holder and a rotatable spindle for retaining the tool holder. The combination tool holder has a central opening at its forward end for receiving a drill bit and a pair... | 07/22/1997 |
| 4580933 | Cutting tool accessory A twist drill is provided with a countersink and collar assembly. The countersink includes a body with a face which cooperates with a similar face of the collar to trap a pair of balls between them. The faces being conical, enable the balls to be driven r... | 04/08/1986 |
| 4353670 | Machining tool A machining tool comprising a rotatable holder, a removable, axially adjustable leading element, such as a drill bit, mounted in the holder and a throw-away cutting insert mounted in a fixed, unadjustable position on the holder to fix the position of the ... | 10/12/1982 |
