Did You Know...
...that the Slinky toy was the result of a failed attempt by engineer Richard James to produce an antivibration device for ship instruments? His goal was to develop a spring that would instantaneously counterbalance the wave motion that rocks a ship at sea. Instead, he developed the Slinky.
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| Number | Title | Issue Date |
| 7249441 | Power drive unit for automobile windows A power unit to replace the manual crank handle of a vehicle window, including a housing for a drive unit that will connect to the splined shaft from which a crank handle has been removed, the power unit including drive means to be affixed to a vehicle door when the... | 07/31/2007 |
| 4953346 | Tractor driven farm machine A haymaking machine provided with at least one rotor (5) driven in rotation has a drive housing (12) equipped with two gears which mesh with one another and have different diameters and different numbers of teeth. Each of the gears is connected to a shaft... | 09/04/1990 |
| 4823655 | Multi-speed drive system for a portable lathe A multi-speed drive system for a portable lathe is disclosed wherein two or more input drive gears are utilized to drive a cutting tool holder ring. Each of the input drive gears has a different pitch diameter so that it will impart different drive speeds... | 04/25/1989 |
| 4546671 | Valve actuators A valve actuator has an electric driving motor for driving an output shaft through reduction gearing and a manual operator for driving the output shaft manually. A drive transfer device for transferring the drive from the electric motor to the manual oper... | 10/15/1985 |
| 4484492 | Devices for selectively coupling to a shaft to be driven two separate driving members Means are provided for coupling at will a driven shaft (2), intended more particularly for adjusting the orientation of the blades of a boat propellor, either to the output shaft (1) of a motor or to a hand operable member (3). To this end there are provi... | 11/27/1984 |
| 4390147 | Three speed drive mechansim for fishing reel A fishing reel is disclosed herein having a frame or cage rotatably supporting a spool for fishing line storage via a turning shaft provided with a driven spool gear. The frame further supports a gear housing having at least three drive gears of varying d... | 06/28/1983 |
| 3930422 | Power transmission apparatus A power transmission apparatus is disclosed in which a power output shaft is connected to both a manual input means and a power input means. Means are provided to automatically disengage the power input upon actuation of the manual input. Alternative embo... | 01/06/1976 |
