Famous Patents
The ice cream cone was invented at the St. Louis Worlds Fair by Ernest Hamwi in 1904. His waffle booth was next to an ice cream vendor who ran short of dishes. Hamwi rolled a waffle to hold ice cream and the cone was born.
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| Number | Title | Issue Date |
| 6952067 | Rotary electric machine and a method of producing the same A surface of a commutator 5 is rubbed by a shakedown brush 21 other than ordinary brushes 11 to produce a carbon coat, whereby a shakedown process can be reduced or abolished. ... | 10/04/2005 |
| 6183355 | Adapter apparatus for sanding, grinding or buffing An adapter apparatus for use with a power operated surface preparation device comprising an upper cap positioned on a first end of a stainless steel spring and a lower cap positioned on a second end of the spring. The center of the upper cap has a threade... | 02/06/2001 |
| 5185967 | Apparatus for truing out of round rotating components An apparatus for truing out of round components of rotating mechanisms includes a grindstone and a weighted hand held holder for the grindstone. The holder includes a sleeve with a passageway for receiving the grindstone telescopically therein and for rem... | 02/16/1993 |
| 4536915 | Machine for truing electrical collectors and the like A machine for truing the collectors or other rotating contact members of a motor, comprises a tool-holder carriage adapted to be fixed either against a brush-holder support associated with the collector or rotor, or against the face of the lower access op... | 08/27/1985 |
| 4525957 | Apparatus and method for finishing radial commutator Grinding apparatus and a method for finishing face-type commutator are shown for producing a cycloidal like grinding pattern which has a controlled depth of surface roughness established by the grain size of abrasive grit and a pitch which is controlled b... | 07/02/1985 |
| 4355553 | Portable turning tool A portable turning tool for removing material from a worn component of a device such as a motor generator. The portable turning tool has a support member which is fixedly secured to the device in such a position so as to have a centrally located opening t... | 10/26/1982 |
| 4007562 | Grinding apparatus for commutators A grinding apparatus for reforming a surface of a commutator of a motor which has been worn or damaged, comprising a main spindle slidably movable in a guide sleeve as a housing of the apparatus, a cutting and feeding mechanism located at the back end of ... | 02/15/1977 |
| 3965623 | Method for trueing commutators and slip rings Trueing of commutators and slip rings of large industrial motors, generators, convertors and the like without dragover of copper into insulating spaces between commutator segments or loading of surface of the trueing tool is afforded by employing an ultra... | 06/29/1976 |
