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...During the Civil War, the Confederacy established its own Patent Office which issued 266 patents, a third of which concerned implements of war.
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| Number | Title | Issue Date |
| 4513640 | Transmission shift control A shift control for a four-speed automatic transmission has a hydraulic pump for supplying pressurized fluid to the control valves including a manual valve, a 1-2 shift valve and a throttle valve. The manual valve directs fluid to a low pressure regulator... | 04/30/1985 |
| 4468987 | Control system for multi-ratio gearing A master controller can be set by the driver in any of a range of forward drive positions D1 to D6 to pre-set upper and lower limits to the engine speed in any of a range of forward ratios such that any increase or reduction in vehicle speed which would c... | 09/04/1984 |
| 4455892 | Hydraulic control means for an automatic transmission Hydraulic control means for an automatic transmission having an improved shift valve which reduce the speed change shock at the speed change. Said shift valve has a sleeve having an oil chamber in which throttle pressure is put and an oil chamber by which... | 06/26/1984 |
| 4449426 | Laminated separator plate means for recalibrating automatic transmissions First, second and third plates make up a laminated separator plate structure for substitution in place of the normal separator plate provided between the valve body and the transmission case in an automatic transmission system. The center of the three pla... | 05/22/1984 |
| 4313353 | Control system for an automatic transmission A control system for an automatic transmission of a motor vehicle having a mechanical planetary gear train with hydraulically actuatable gear shift elements, and a manual control valve for delivering a first pressurized fluid to a selected gear shift elem... | 02/02/1982 |
| 4248106 | First-second gear shift valve of hydraulic transmission control system In a hydraulic control system of an automatic power transmission is provided a first-second gear shift valve which is to be acted upon through only one fluid inlet port by a signal fluid pressure representative of a manual first forward drive range select... | 02/03/1981 |
| 4161895 | Hydraulic control system for automatic transmission An hydraulic control system for automatic transmissions includes at least first and second engaging members, a transmission for establishing at least two change gear ratios due to the selective engagement of said first and second engaging members, a first... | 07/24/1979 |
| 4145937 | Hydraulic control system for use in automatic transmission A hydraulic control system for a vehicle automatic transmission includes: a first frictional engaging device operable for shifting to a low speed drive; a first hydraulic servo for the first frictional engaging device, a second frictional engaging device ... | 03/27/1979 |
| 4126154 | Shift signal valve hysteresis A transmission having a plurality of gear ratios which are selectively engaged on the supply of fluid to a servo motor fluid chamber and controls. The controls have a source of fluid under regulated pressure selectively connected by a relay valve respecti... | 11/21/1978 |
| 4098148 | Transmission controls A control mechanism for a planetary overdrive gear mechanism for an automatic transmission which utilizes a double-acting one-way clutch with a clutch controller to immobilize the cage for the one-way clutch to allow inner and outer races to rotate relati... | 07/04/1978 |
| 4047454 | Shift signal valve hysteresis A transmission having a plurality of gear ratios which are selectively engaged on the supply of fluid to a servo motor fluid chamber and controls. The controls have a source of fluid under regulated pressure selectively connected by a relay valve respecti... | 09/13/1977 |
| 3978743 | Fluid pressure control system for automatic transmission A fluid pressure control system for automatic transmission includes a fluid pressure source, a fluid pressure regulating valve for regulating the fluid from the source to a particular line pressure, and a plurality of frictional engaging devices, adapted ... | 09/07/1976 |
