William F. Semple, a dentist, was awarded the first US Patent on chewing gum in 1869. His recipe contained powdered chalk.
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| Number | Title | Issue Date |
| 7234649 | Spray gun A spraying apparatus for spraying liquid surface treatment material which includes a gas inlet, a liquid inlet and an outlet nozzle. The apparatus also has a needle valve for regulating the supply of surface treatment material to the nozzle. The needle valve is at l... | 06/26/2007 |
| 7004404 | Spray gun A spraying apparatus for spraying liquid surface treatment material which includes a gas inlet, a liquid inlet and an outlet nozzle. The apparatus also has a needle valve for regulating the supply of surface treatment material to the nozzle. The needle valve is at l... | 02/28/2006 |
| 6912795 | Conical hydrodynamic bearing gauging apparatus and method A conical hydrodynamic bearing gauging and seating system that enables the efficient seating of conical hydrodynamic bearings to a rotor shaft and hub while the rotor assembly remains in a pressing fixture. The invention provides a conical hydrodynamic bearing gaugi... | 07/05/2005 |
| 6272910 | Camshaft degreeing platform A measurement platform for an overhead cam shaft type internal combustion engine having at least one piston reciprocable within a cylinder formed in a block; an intake valve and an exhaust valve for the cylinder, wherein intake and exhaust cam lobes on th... | 08/14/2001 |
| 6256897 | Three dimensional cam, method and apparatus for measuring three dimensional cam profile, and valve drive apparatus An engine valve drive apparatus. A camshaft rotatably supported by the engine includes a cam for selectively opening and closing a valve. The cam has a cam surface for driving the valve. The cam surface has a profile that varies continuously in the direct... | 07/10/2001 |
| 5508944 | Apparatus and method for checking features of a camshaft A camshaft checking apparatus, in particular for checking the parameters of the profiles of cams, comprising a support structure and a motor means for positioning and axially rotating the shaft, linear transducers for determining radial dimensions of cams... | 04/16/1996 |
| 5131160 | Device for measuring woodruff keyways and method of using The invention is directed to an adaptor device suitable for use with a measuring apparatus to determine the centrality to the centerline of a Woodruff keyway in a shaft. The adaptor allows the measuring apparatus to rest on the top surface or outside diam... | 07/21/1992 |
| 5007302 | Alignment apparatus for a stroke controlling mechanism of a machine tool An alignment apparatus for a stroke controlling mechanism having a cam shaft with a number of cams disposed around the cam shaft includes one or more circular lines and one or more sets of circular lines formed around the cam shaft. One or more longitudin... | 04/16/1991 |
| 4970799 | Device for measuring a shaft keyway and method of using A device for measuring the centering, parallelism, and perpendicularity of the side walls of a keyway to the centerline of the keyway in a shaft is described. The preferred embodiment of the device includes a micrometer slidingly attached to the device, a... | 11/20/1990 |
| 4265024 | Jig for storing adjustment positions A jig is provided for storing setting data of apparatus having a plurality of adjacent slidable setting members. The positions of the members relative to the frame and to each other determines the setting data of the apparatus. The jig includes a pluralit... | 05/05/1981 |
| 4204331 | Keyway gauge A measuring and gauging instrument has a column secured to a base, a carrier adjustably movable along the column to a selected position and releasably mounting a selected anvil thereon, and a dial indicator mounted on a support adjustably movable to a sel... | 05/27/1980 |
| 4106205 | Apparatus for measuring inside and outside chamfers on workpieces Apparatus for measuring the angle and size of inside and outside chamfers. The apparatus comprises a body having a stop edge with a tongue displaceably mounted to the body, the tongue having a stop edge corresponding to the chamfer angle. Means are provid... | 08/15/1978 |
| 3936946 | Gear tester for pitch measuring A gear testing apparatus has a probe or feeler biassed into engagement with a gear tooth flank for measurement of the flank. To lift the feeler from the tooth flank and/or to displace it to a further setting in which it can be used to measure an oppositel... | 02/10/1976 |