Did You Know...
...that Charles Goodyear performed some of his experiments on rubber while in debtor's prison? He was there so often he referred to it as his "hotel". Chronically in debt because of poor business sense and ill health, Goodyear depended on the generosity of friends and family. Even after he unlocked the secret to vulcanizing rubber, he was unable to improve his financial situation. When he died, his estate was $200,000 in debt.
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| Number | Title | Issue Date |
| 7334385 | Automated tucking process for covering a penetrable core material A process for covering a rigid, penetrable core article with covering material and automatically tucking the material into a surface of the article with an automatically reciprocating plunger. ... | 02/26/2008 |
| 6644535 | Truss core sandwich panels and methods for making same A structural material includes a plurality of discrete, interwoven wires disposed between and fastened to two solid face sheets. Each of the plurality of wires further includes at least two points of contact with each of the two face sheets. Methods for f... | 11/11/2003 |
| 4373129 | Apparatus for assembling and welding vented cell covers An apparatus for assembling the component parts of a cover for an electrochemical cell into a cover assembly and for welding the assembly, the apparatus including a carousel having a plurality of equally spaced receptacles, an equal number of equally spac... | 02/08/1983 |
| 4290544 | Apparatus for deforming an object and securing it to a support member A mirror mounting is described in which a plane rectangular reflecting strip is deformed along the two longer edges thereof so that it is approximately tangent to the ideal mirror while the strip remains substantially flat in the direction of its shorter ... | 09/22/1981 |
| 4209684 | Fusion technique of assembling rotary drill bit and adjusting gage of cutting elements A high energy electron or laser beam is preferably used to assemble a drill bit. Bit segments are integrally adjoined together to form the drill bit assembly. Abutting confronting faces of the adjoining bit segments are aligned parallel to the drill bit a... | 06/24/1980 |
| 4175228 | Method of hot bending a generally straight wire blank A method of hot bending a generally straight wire blank of a material being brittle in cold condition into a wire element having straight end portions and coils formed therebetween. According to the invention the rod blank is hot bent without a mandrel by... | 11/20/1979 |
| 4166943 | Apparatus for welding lead wires together A method for welding lead wires together by twisting into a strand a plurality of lead wires of electrical parts or the like, producing an arc between the strand and a carbon electrode, thereby melting and welding the strand by the heat from the arc to ob... | 09/04/1979 |
| 4143536 | Method of correcting rotational speed of screw propeller The rotational speed of a screw propeller mounted on a propeller shaft of a ship is correctively increased or decreased by locally heating the back or face side of each blade of the propeller along a plurality of paths substantially parallel to and inward... | 03/13/1979 |
| 4103570 | Method of and apparatus for making a sheet metal zig-zag key This invention describes a method of making a sheet metal zig-zag key for a lock. The technique of making a zig-zag key, either as a duplicate of another or in the original form, consists of passing a heavy current through the key so as to get it into a p... | 08/01/1978 |
| 4011429 | Hot stretch-wrap forming with resistance heating Stretch-wrap forming of titanium parts or the like by resistance heating the part and a steel forming element which is cast into a fused silica die insert. Heating is accomplished by an electrical circuit in which both the part and the element are connect... | 03/08/1977 |
| 3973098 | Piston ring forming method A method and apparatus for forming piston rings are disclosed. A split piston ring made by conventional processes is locally heated along its inside surface for a short distance either side of the split. This causes a short length of the ring on either si... | 08/03/1976 |
| 3935413 | Apparatus for stress relieving springs and the like Apparatus comprising a rotary supporting table for moving circumaxial series of work holders in a predetermined circular path. Each work holder comprises an upright pin adapted to receive on and about itself a coil spring and a base member. The base membe... | 01/27/1976 |
