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580 条记录 (耗时 0.017 秒)

    Sensing circuits
    81.
    发明授权
    Sensing circuits 失效

    公开(公告)号：US4010486A

    公开(公告)日：1977-03-01

    申请号：US571688

    申请日：1975-04-25

    申请人： Sadao Suzuki

    发明人： Sadao Suzuki

    IPC分类号： G01R33/09 ,  G01K7/01 ,  G01K7/20 ,  G05D23/20 ,  H01L21/331 ,  H01L27/07 ,  H01L29/00 ,  H01L29/36 ,  H01L29/73 ,  H01L31/00 ,  H01L43/00 ,  H03F1/30 ,  H01L29/66 ,  H01L27/22 ,  H01L29/74 ,  H03K3/26

    CPC分类号： H01L29/00 ,  G01K7/20 ,  G05D23/20 ,  H01L27/0716 ,  H01L31/00

    摘要： A sensing circuit for detecting a change in a normal characteristic of an object such as a change in a normal temperature characteristic, a change in a normal magnetic field characteristic, or a change in a normal light falling on the sensing element of the sensing circuit is provided. The circuit employs a four-terminal semiconductor device having alternate layers of conductivity type, which has an amplification characteristic of the collector current to the base-emitter grounded, wherein there is a sharp decrease in the h.sub.FE amplification characteristic at one value of gate to emitter voltage. This point represents the point in which the semiconductor device is biased for a normally desired characteristic being sensed. Whenever there is a deviation from this normal position, there is a sharp rise in the h.sub.FE irrespective of what the direction of deviation is. The h.sub.FE gain then substantially levels off.

    Temperature control apparatus
    82.
    发明授权
    Temperature control apparatus 失效
    温度控制装置

    公开(公告)号：US3971876A

    公开(公告)日：1976-07-27

    申请号：US592888

    申请日：1975-07-03

    申请人： Donald E. Witkin ,  Arnold G. Bowles

    发明人： Donald E. Witkin ,  Arnold G. Bowles

    IPC分类号： C30B7/00 ,  C30B7/10 ,  G05D23/20 ,  G05D23/22 ,  H05B1/02

    CPC分类号： C30B29/18 ,  C30B7/00 ,  C30B7/10 ,  G05D23/1934 ,  G05D23/20 ,  G05D23/22

    摘要： The disclosed invention describes an apparatus and method for bringing a system having high interactive portions to a predetermined temperature distribution. The invention includes a difference controller which provides, through two separate drivers, a fixed total amount of energy to the system being controlled. If the system being controlled also has a long cycle time, second and third temperature controllers may be used to bring the system to the equilibrium temperature with a minimum amount of overshoot. The invention is particularly advantageous when used in connection with a high pressure, high temperature vessel useful in growing quartz crystals.

    摘要翻译： 所公开的发明描述了一种将具有高互动部分的系统带到预定温度分布的装置和方法。 本发明包括差分控制器，其通过两个单独的驱动器向被控制的系统提供固定的总量的能量。 如果被控制的系统也具有较长的循环时间，则可以使用第二和第三温度控制器以最小量的过冲使系统达到平衡温度。 当与用于生长石英晶体的高压高温容器结合使用时，本发明是特别有利的。

    Electronic furnace control system
    83.
    发明授权
    Electronic furnace control system 失效
    电子炉控制系统

    公开(公告)号：US3921899A

    公开(公告)日：1975-11-25

    申请号：US49001574

    申请日：1974-07-19

    申请人： HAMILTON CLAIR

    发明人： HAMILTON CLAIR

    IPC分类号： F23N5/02 ,  F23N5/20 ,  F24H9/20 ,  G05D23/20 ,  F24D5/04 ,  F24F11/00

    CPC分类号： G05D23/20 ,  F23N5/022 ,  F23N5/20 ,  F23N2027/10 ,  F23N2033/06 ,  F24H9/2085

    摘要： An electronic furnace control system for forced air gas or oil fired furnaces includes an operating relay circuit for the furnace fan which is operated by a variable timing circuit shortly after fuel is supplied to the furnace burner. A latching circuit latches the fan motor relay circuit in a closed condition to substantially continuously operate the furnace fan as long as the furnace thermostat is closed and requires heat. The temperature in the furnace hot air plenum chamber is continuously monitored by a temperature sensing circuit which controls the solenoid operated valve of the furnace burner. A reset timing circuit resets the fan motor relay latching circuit after a predetermined delay when the furnace thermostat de-energizes the valve controlling solenoid.

    摘要翻译： 用于强制气体或燃油炉的电子炉控制系统包括用于炉风扇的操作继电器回路，其在燃料供应到炉燃烧器之后不久就由可变定时回路操作。 只要炉子恒温器关闭并且需要热量，闭锁电路将风扇电动机继电器电路锁定在关闭状态，以基本上连续操作炉子风扇。 通过控制炉式燃烧器的电磁阀的温度检测电路来连续监测炉内热空气室室内的温度。 复位定时电路在炉子恒温器使阀门控制螺线管断电之后，在预定的延迟之后复位风扇马达继电器闭锁电路。

    Method and apparatus for sensing and regulating the temperature of a fluid
    84.
    发明授权
    Method and apparatus for sensing and regulating the temperature of a fluid 失效
    用于感测和调节流体温度的方法和装置

    公开(公告)号：US3821516A

    公开(公告)日：1974-06-28

    申请号：US32373673

    申请日：1973-01-15

    申请人： LAUREL COLOR INC

    发明人： HAYES D ,  ROTH S

    IPC分类号： G05D23/20 ,  H05B1/02

    CPC分类号： G05D23/20 ,  G05D23/1913

    摘要： Method and apparatus for sensing and regulating the temperature of a fluid is provided having means for generating a first signal whenever the actual temperature of the fluid whose temperature is to be regulated is lower than a preselected temperature level. The first signal has an amplitude proportional to the magnitude of the difference between the actual fluid temperature and the preselected temperature level. Means are provided for generating an output signal whenever the amplitude of a reference signal exceeds the amplitude of the first signal. Means are also provided for heating the fluid, the duration of said heating being proportional to the duration of said output signal.

    Heat control apparatus
    85.
    发明授权
    Heat control apparatus 失效
    热控制装置

    公开(公告)号：US3814902A

    公开(公告)日：1974-06-04

    申请号：US24956972

    申请日：1972-05-02

    申请人： FANN J

    发明人： FANN J

    IPC分类号： G05D23/20 ,  H05B1/02

    CPC分类号： G05D23/20 ,  G05D23/1904

    摘要： Heat control apparatus for control of electrical input to an electric heater element to achieve linear temperature rise heating. Time-reduced voltage is applied to a temperature-sensing themocouple (or a thermistor, resistance thermometer, or the like) whereby a controller for heating element is caused to deliver current to the heating element to linearly increase the temperature of the substance being heated.

    摘要翻译： 用于控制对电加热器元件的电输入以实现线性升温加热的热控制装置。 将时间降低的电压施加到温度敏感的电偶（或热敏电阻，电阻温度计等），由此使加热元件的控制器向加热元件输送电流，以线性地增加被加热物质的温度。

    Computerized control systems
    89.
    发明授权
    Computerized control systems 失效
    电脑控制系统

    公开(公告)号：US3400374A

    公开(公告)日：1968-09-03

    申请号：US46440465

    申请日：1965-06-16

    申请人： ROBERTSHAW CONTROLS CO

    发明人： SCHUMANN PAUL A

    IPC分类号： F24F11/02 ,  F01D17/00 ,  F24F11/00 ,  G05B11/32 ,  G05B15/00 ,  G05B15/02 ,  G05B23/02 ,  G05D23/20 ,  G08G1/08

    CPC分类号： G05B15/02 ,  F24F11/30 ,  F24F2110/10 ,  G05D23/1917 ,  G05D23/20

    摘要： 1,155,432. Refrigerating. ROBERTSHAW CONTROLS CO. 16 June, 1966 [16 June, 1965], No. 26984/66. Heading F4H. [Also in Division G3] The heating and cooling systems for a building complex are controlled by a known digital computer having a stored programme. Temperatures at selected points of each system, Figs. 1, 2 (not shown), are sensed by thermocouples and compared by the computer with stored predetermined values and the necessary control actions are initiated by digital signals which, through a multiplexer, actuate digital stepping motors positioning the mechanical controls of a system. As shown for a cooling system, Fig. 3, output signals 1P1S from the computer are used to control liquid cooling units 1-3 connected, in series-parallel, to air cooling heat exchangers AHI-AHL which are connected in parallel. The cooling units are identical and unit 1 comprises an evaporator 96 and condenser 100 through which the coolant is circulated by a compressor 98. The condenser is cooled by the water flow through a cooling tower 109 which is circulated by a pump 106. The coolant flow in the evaporator 96 is determined by a vane control 94 positioned, through a pneumatic diaphragm arrangement 88, by a ball-valve 74 positioned by a digital stepping motor 50. The stepping motor 50 is controlled through a transfer network and contacts 42, 46, actuated by alternately energized relay coils 34, 36 responsive to computer output signals 1P1S 3-6. Input signals 1P1S 1-2 control the energization of a motor 98M for the compressor 98, signals 1P1S T1-2 control the tower 109 and 1P1S P1-4 control a motor 106M for pump 106 and a motor 110M for pump 110 in the circulating line to the heat-exchangers AH1-AHL. The monitoring input signals comprise a positional feedback signal 1P1FS from a potentiometer 1PT1 coupled to the stepping motor 50, signals 1KM1-3 from the pump compressors and representing their power consumption; signals 1FM1-3FM1 representative of the flow rate through the cooling units 1-3, signals 1CTS1-3CTS2 representative of the inlet and outlet temperatures of the cooling units, and a signal CRS representative of the common return temperature which are derived to evaluate the temperatures across the cooling units; input signals 1SI-1SL are derived from temperature sensing devices associated with the heat-exchangers AH1-AHL. It is stated that the computer controls the start-up and close-down of a cooling unit and optimizes the operation of the units in dependence on demand. A read-out console is stated to record the efficiencies of the systems.