Did You Know...
...that after Parker Brothers executives turned down the game of Monopoly because it had "52 fundamental errors" (including taking too long to play), a copy of the game wound up in the home of the company president who stayed up until 1 a.m. to finish playing it? He was so impressed by the game that the next day he wrote to inventor Charles Darrow and offered to buy it!
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 4085326 | Radiation reflection method and apparatus particularly for gauging materials exhibiting broadband absorption or scattering, or similar effects Methods and apparatus are provided for gauging the thickness or other property of a plastic film such as blown film or other material having a front side, a back side, and characteristics including a substantial transparency to radiation at a reference wa... | 04/18/1978 |
| 4052615 | Spherical cavity method and apparatus for measuring a sheet material property using infrared radiation A property such as moisture content in a sheet of material such as paper that both absorbs and strongly scatters infrared radiation is measured by passing the sheet through the central region of a substantially spherical cavity formed between a pair of co... | 10/04/1977 |
| 4042869 | Backlash compensation A system for compensating for the backlash of a drive mechanism of an actuator that can be controlled manually or switched to automatic, with the starting position indeterminate. The actuator includes a position transducer for the actuator. Impulses are s... | 08/16/1977 |
| 4027161 | Minimizing wave interference effects on the measurement of thin films having specular surfaces using infrared radiation A property of a thin, infrared radiation-transmissive film of plastic or the like with specular surfaces is measured with substantial freedom from errors caused by wave interference effects, utilizing first and second infrared radiations having wavelength... | 05/31/1977 |
| 3995478 | Plural interrelated set point controller Set points for thicknesses of coatings on opposite sides of a sheet are determined in response to measurements of the thickness of each coating. A computer responds to the two thickness measurements to derive indications of the spread of values of the mea... | 12/07/1976 |
| 3936665 | Sheet material characteristic measuring, monitoring and controlling method and apparatus using data profile generated and evaluated by computer means A sheet material characteristic monitoring apparatus is provided for use in processes involving the production and contouring of sheet material. In a preferred embodiment, the sheet material characteristic is measured at two or more stationary cross direc... | 02/03/1976 |
| 3930922 | Process control A process monitoring and control system is provided for use in a tire calendering system producing a strip of rubber tire material comprising a layer of tire cord laminated between first and second layers of rubber. In a preferred embodiment, the thicknes... | 01/06/1976 |
| 3930934 | Speed optimization control for fibrous sheet making machines such as paper making machines with dryer limited conditions Specifically disclosed is the combination of a paper making machine and a control system including an automatic arrangement which, on demand of the machine operator, performs a coordinated machine speed increase, maintaining the paper sheet characteristic... | 01/06/1976 |
| 3930774 | Extruder controller Thickness of a sheet being produced by an extruder is controlled in response to measurements of: sheet thickness, the speed at which material is fed through a screw of the extruder, as determined by screw speed, and the speed with which material is taken ... | 01/06/1976 |
