| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 41 | JPS52158297U - | JP6749076 | 1976-05-26 | JPS52158297U | 1977-12-01 | |
| 42 | JPS5122450B2 - | JP7770371 | 1971-10-04 | JPS5122450B2 | 1976-07-09 | |
| 43 | JPS4934948Y1 - | JP9414468 | 1968-10-29 | JPS4934948Y1 | 1974-09-21 | |
| 44 | JPS4841942A - | JP7770371 | 1971-10-04 | JPS4841942A | 1973-06-19 | |
| 45 | Pneumatic controller | US849552 | 1977-11-08 | US4153068A | 1979-05-08 | Takeshi Yoshida |
| Discloses a pneumatic controller having a proportional band altering unit, a proportional plus integral operation unit, a comparator and a manual-automatic transfer means, wherein the proportional band altering unit is combined with the proportional plus integral operation unit to provide a proportional band altering mechanism which limits input to prevent output of the comparator from being saturated whereby to enable the pneumatic controller to perform the transfer between the manual and automatic modes in a balanceless and bumpless manner. | ||||||
| 46 | Electro-proportional pressure control apparatus | US721936 | 1976-09-10 | US4055197A | 1977-10-25 | Robert E. Raymond |
| The invention contemplates improved hydraulic-pressure control apparatus which will proportionally reflect input-signal changes governing a wide range of output pressures. Use of a separate preamplifier stage, between a signal-pressure stage and a power stage, enables the signal pressure to remain essentially unaffected by load reaction or other transients at the power stage. In the forms described, an input electrical signal determines a step-function program of signal-pressure levels, and the power stage includes a relief valve which so diverts system-line flow to a sump as to assure quick and accurate response of system-line pressure to the instantaneous input electrical-signal level, all without system-pressure overshoot. | ||||||
| 47 | Auxiliary relay power unit control | US53358055 | 1955-09-12 | US2979035A | 1961-04-11 | PATTERSON RALPH E |
| 48 | Controller limit system | US79475859 | 1959-02-20 | US2973772A | 1961-03-07 | OGLESBY JR MINOR W |
| 49 | Indicating and/or control apparatus | US65342757 | 1957-04-17 | US2935670A | 1960-05-03 | GORRIE HARVARD H |
| 50 | Indicating and controlling apparatus | US73822458 | 1958-05-27 | US2920155A | 1960-01-05 | LAMONT CORCORAN LEWIS |
| 51 | Multiple jet pipe relay regulator | US60049756 | 1956-07-27 | US2849013A | 1958-08-26 | CALLENDER BERNARD L |
| 52 | Fluid pressure characterizing relay | US23283551 | 1951-06-21 | US2777457A | 1957-01-15 | LUPPOLD JR GEORGE E |
| 53 | Pressure fluid operated balanced control system | US24892051 | 1951-09-29 | US2776670A | 1957-01-08 | HUNT VERLE J |
| 54 | Elastic-fluid-pressure-actuated means for adjusting the proportional band of a controller | US20315150 | 1950-12-28 | US2773506A | 1956-12-11 | BAUER WILLIAM E |
| 55 | Control apparatus | US22150151 | 1951-04-17 | US2712321A | 1955-07-05 | GROGAN EDWARD C |
| 56 | Valve | US67321233 | 1933-05-27 | US2054464A | 1936-09-15 | CLARENCE JOHNSON |
| 57 | Smart valve positioner | US230492 | 1994-04-20 | US5431182A | 1995-07-11 | Gregory C. Brown |
| A valve positioner controls operation of a valve in a process control system. The valve positioner is coupled to a process control loop over which it receives a signal representative of a desired valve position and operating power for the positioner. The valve positioner controls a pneumatic actuator which in turn controls position of the valve. The valve positioner includes a microprocessor, associated digital circuitry and analog circuitry. Low power analog circuitry performs PID control functions. The microprocessor periodically updates at least one digital control signal used to selectively program a resistance in the analog circuitry. The combination of digital and analog circuitry allows reduced power consumption because the analog PID function consumes less power and is performed more quickly than the microprocess could perform the same function. | ||||||
| 58 | Heat regenerator particulary a hot blast stove for a blast furnace plant | US3713632D | 1971-03-02 | US3713632A | 1973-01-30 | BEENHAKKER A; FELTHUIS J |
| In a heat regenerator, in particular a hot blast stove for a blast furnace plant, which comprises an upstanding masonry structure closed on top by a dome of refractory bricks, the dome passes into the vertical masonry structure below it by means of a continuous series of elements which are pivotally connected both to the stove structures below it close to the upper edge of the vertical masonry structure and to the lower edge of the dome.
|
||||||
| 59 | Process controller | US13553961 | 1961-09-01 | US3208465A | 1965-09-28 | VIRBILA WILLIAM C |
| 60 | Controller | US930760 | 1960-02-17 | US3079074A | 1963-02-26 | JORDAN ARTHUR H |
QQ群二维码
意见反馈
意见反馈