Did You Know...
...that power steering was invented by independent inventor Francis W. Davis? As chief engineer in the 1920s of the truck division of the Pierce Arrow Motor Car Company, he saw how hard it was to steer heavy vehicles. So that he would be able to keep the profits from his future invention, Davis left his job, rented a small engineering shop in Waltham, Mass., and developed a hydraulic power steering system that led to power steering.
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| Number | Title | Issue Date |
| 6238384 | Instrument for compensating for hand tremor during the manipulation of fine structures An instrument for the manipulation of fine structures, said instrument detecting hand tremor and compensating for this hand tremor by effecting counter-movements of the working tip. The main area of application will probably lie in the field of microsurge... | 05/29/2001 |
| 4423412 | Industrial process indicating/recording apparatus using stepping motor drive A compact ribbon-indicator and chart-recorder instrument for use in process control systems adapted to indicate and simultaneously record the values of up to three independent process variables. The motive power for each pen/indicator drive system is supp... | 12/27/1983 |
| 4203094 | Apparatus for selectively displaying a plurality of indication panels A plurality of sensors are provided each sensing a different condition occurring in a motor vehicle. Each sensor supplies a signal to a converter which converts the signals into a four-digit binary coded signal. A plurality of condition indicating panels,... | 05/13/1980 |
| 4150356 | Indication apparatus An indication apparatus which detects a plurality of abnormal conditions occurring in a motor vehicle particularly in an automobile, and indicates an indicium corresponding to one of the abnormal conditions. When at least one of a plurality of sensors det... | 04/17/1979 |
| 4131886 | Indication system An indication system for indicating abnormal conditions on an indication drum. A rotary switch having a plurality of stationary contacts connected to a plurality of sensors and a movable contact connected to the indication drum is provided to control the ... | 12/26/1978 |
| 4117474 | Communications device with plural, power-operated display mechanisms selectively controlled by an operator A communications device including plural, power-operated display mechanisms selectively controllable by the operator of the device whereby each may be made to display an information symbol selected at the will of the operator. The device may include a sca... | 09/26/1978 |
| 4090194 | Indication apparatus An indication apparatus indicates a highest priority one of a plurality of simultaneously occurring abnormal states of a vehicle. When one of a plurality of abnormal state sensors is opened, a drive motor coupled to an indication drum starts to rotate and... | 05/16/1978 |
| 4087804 | Information display device A group of information carrying flaps are pivoted to the circumference of a drum so that, upon rotation of the drum, the flaps drop down, one by one; the flaps carry information conveying indicia, for example trouble indication during operation of a motor... | 05/02/1978 |
| 4064502 | Positioning control system for alphanumeric displays A destination sign for buses is disclosed with an automatic positioning system for a plurality of sign modules. The sign is made up of plural modules, each of which is capable of displaying any one of a set of alphanumeric characters. The display of a mod... | 12/20/1977 |
| 4017851 | Position-control mechanism for stepwise rotating members The invention relates to a device for checking the angular position and the starting position of a roller supporting a plurality of indicating pallets, which roller is driven in stepwise rotation. The device comprises magnetic members adapted to sense the... | 04/12/1977 |
| 3964049 | Vertical scale take up mechanism A vertical scale indicator has an index movable relative to a scale for indicating a condition sensed by a signal condition device. The index is supported on a flexible band wound on two drums. One drum is driven directly by a servomotor responsive to sig... | 06/15/1976 |
