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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 |
| 4796585 | Vacuum advance regulator for a spark ignition engine A vacuum advance regulator designed to control the suction force of the vacuum that is applied to the vacuum advancer. The suction, in turn, controls the spark timing and allows combustion to occur when the crank position is at 12 degrees at the ATDC, thu... | 01/10/1989 |
| 4541381 | System for controlling the ignition timing of an engine A system for controlling the ignition timing of an engine provided with a supercharger. The system comprises a vacuum advance device comprising two chambers defined by a diaphragm and a rod connecting the diaphragm to an advance mechanism of a distributor... | 09/17/1985 |
| 4258688 | Time delay valve A time delay valve used in vacuum systems of internal combustion engines to significantly reduce exhaust emission pollutants. The valve includes a resilient valve disk with an orifice therethrough. An enlarged cavity is provided adjacent the valve disk in... | 03/31/1981 |
| 4198937 | Pneumatic control apparatus for internal combustion A pneumatic control apparatus is disclosed for an engine exhaust emission control device which includes a passage 101 for applying a negative intake passage pressure to a chamber of a differential pressure responsive unit 10 an atmospheric venting vacuum ... | 04/22/1980 |
| 4176636 | Internal combustion engine having exhaust emission control system Air bleeding apparatus for an exhaust emission control system comprising three plates joined face to face. The first plate has a plurality of grooves each communicating at one end with a vacuum source and at the other end with a vacuum actuator for an ign... | 12/04/1979 |
| 4158349 | Ignition timing control system for an internal combustion engine An ignition timing control system for an internal combustion engine, including a vacuum actuator connected to turn a point base about the axis of the rotary cam which operates the breaker points to advance or retard the ignition timing. The vacuum actuato... | 06/19/1979 |
| 4135480 | Spark vacuum advance control An ignition spark advance system for use with spark ignited internal combustion engines having an exhaust gas recycle system which includes EGR vacuum modulator means connected to and modulating an exhaust gas recycle valve. A conventional first vacuum ac... | 01/23/1979 |
| 4099497 | Internal combustion engine having exhaust emission control system The characteristics of an exhaust emission control system can be varied by bleeding air into a vacuum conduit through which a vacuum is applied to a vacuum actuator in the exhaust emission control system. Means for bleeding air into the vacuum conduit inc... | 07/11/1978 |
| 4040401 | Spark vacuum advance control An ignition spark advance system for use with spark ignited internal combustion engines having an exhaust gas recycle system which includes EGR vacuum modulator means connected to and modulating an exhaust gas recycle valve. A conventional first vacuum ac... | 08/09/1977 |
