Did You Know...
...that Thomas Edison's patent application on his phonograph was approved by the Patent Office in just seven weeks? In contrast, it took Gordon Gould, the inventor of the laser, 30 years to obtain his patent -- finally awarded in 1988!
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| Number | Title | Issue Date |
| 4797254 | Protection means for a process analyzer system A sheltered-type protection means for process instrumentation/automation, particularly quality measuring equipment for industrial processes with a hazardous environment and materials is described, which has a self-supporting housing with an extractable su... | 01/10/1989 |
| 4790223 | Method and apparatus for separating off individual items from a stack of precut strips For separating off a stack of individual shaped items such as bottle neck labels from a stack of strips each carrying several such items, a punching die is used which has a punching contour which corresponds to the desired shape of the cutting line betwee... | 12/13/1988 |
| 4789297 | Enclosed wind device mechanism with eccentric rotor shaft A wind drive mechanism (10), comprising a housing (16) with a wind entry opening (25) and a wind outlet opening (26). In the housing (16) a rotor (30) is arranged with a vertically extending rotor shaft (31). The rotor shaft (31) is offset from the middle... | 12/06/1988 |
| 4784197 | Barking drum and method of heating same For supplying pressurized steam into a rotating barking drum during the barking of tree trunks in order to thaw and warm the bark, steam is supplied into the barking drum from the periphery of the drum in a substantially radial direction through a distrib... | 11/15/1988 |
| 4732523 | Ship unloading mechanism A ship unloading mechanism has an endless, vertically operating compartmented belt conveyor by which material to be lifted is transported from a ship's hold at the lower end of the conveyor onto a horizontal conveyor at the top end of the conveyor, when t... | 03/22/1988 |
| 4689510 | Electric motor and flywheel for operation while immersed in a liquid An electric motor, for instance for a hydraulic elevator, is entirely immersed within a liquid such as oil, and is provided with a flywheel. A drawback of this kind of electric motor is that the flywheel, rotating in oil, brakes the rotation of the motor.... | 08/25/1987 |
| 4689512 | Electric motor An electric motor, e.g. for use in a hydraulic elevator, has a stator surrounding a rotor and a stator frame around the stator, to which frame end flanges of the motor are secured. The stator frame is formed by a metal sheet bent into the form of a trough... | 08/25/1987 |
| 4672277 | Elevator motor control A method and apparatus for controlling a direct current motor of an elevator during emergency braking by conducting a current generated by the motor through a braking resistor are disclosed, in which a semiconductor switch connects the braking resistor ac... | 06/09/1987 |
| 4582106 | Apparatus for separation of bark from timber An apparatus for separating bark, such as birchbark, from timber during conveyance of the timber has a conveyor for advancing logs leaving a stripping drum. To achieve an effective separation of bark, rollers conveying the logs form a bark separating unit... | 04/15/1986 |
