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    • 6. 发明授权
    • Fabricated rotor for rotary valves
    • 旋转阀制造转子
    • US5307963A
    • 1994-05-03
    • US836376
    • 1992-02-18
    • Andrew Mitchell
    • Andrew Mitchell
    • G01F11/22G01F11/24G01F11/10
    • G01F11/24G01F11/22
    • A rotor for a rotary valve of the type including a housing providing a rotor chamber with a material inlet and a material outlet and a drive shaft journaled in said housing for supporting said rotor in said rotor chamber. The rotor includes a rotor shaft operatively connectable to the drive shaft and disposable in said rotor chamber. The rotor shaft has a plurality of longitudinally disposed, circumferentially spaced between recesses in which an edge of a plurality of vanes are received. The recesses include a slot preferably with a dovetail cross-sectional configuration, with the edge of the vanes having a comparable cross-sectional configuration. A pair of shrouds are included on either side of the vanes.
    • 一种用于旋转阀的转子,其包括:壳体,其提供具有材料入口和材料出口的转子室,以及轴承在所述壳体中的驱动轴,用于将所述转子支撑在所述转子室中。 转子包括可操作地连接到驱动轴并且在所述转子室中一次性的转子轴。 转子轴具有多个纵向设置的凹槽之间的周向间隔,多个叶片的边缘被容纳在凹槽中。 凹槽包括优选地具有燕尾形横截面构造的槽,叶片的边缘具有相当的横截面构型。 在叶片的任一侧包括一对护罩。
    • 10. 发明授权
    • Residential fuel-oil level reporting and alarm system
    • 住宅燃油油价报告和报警系统
    • US4845486A
    • 1989-07-04
    • US907120
    • 1986-09-12
    • John D. KnightRobert D. ShapiroFrank H. BanksAndrew MitchellBarry S. SunrayRobert A. DeFrancesco
    • John D. KnightRobert D. ShapiroFrank H. BanksAndrew MitchellBarry S. SunrayRobert A. DeFrancesco
    • G01F23/36H04M11/00
    • G01F23/36H04M11/002
    • An automatic reorder and alarm system for use with residential fuel-oil tanks which sends reorder and alarm data to a central station over the direct-dial telephone network when the fuel-oil level in the tank falls below a predetermined value or when an alarm situation, such as low temperature, occurs at the tank location. An inexpensive sensor/sending unit located at each customer tank includes a simple sensor which mounts on either the tank or an existing fuel-oil level gauge, a microcontroller circuit and a modem circuit. The microcontroller circuit uses a simple low-stability oscillator as a reference for internal operations and for modem transmission frequencies. Because the oscillator frequency cannot be precisely determined due to component tolerances and has a substantial amount of drift, a special data transmission format is used for data transmission over the telephone lines between the microcontroller and the central station. The data format consists of a selected pattern of mark and space signals in which each mark signal consists of a predetermined number of cycles of an oscillating signal whose frequency is determined by the internal modem oscillator and each space signal is an equivalent time period without a signal. At the receiver the bit time duration is determined by averaging bit times in a predetermined bit pattern header.
    • 一种用于住宅燃油油箱的自动重新排序和报警系统,当油箱中的燃料油液位低于预定值时或当报警情况下,当通过直拨电话网络向中心站发送重新排序和报警数据 ,如低温,发生在油箱位置。 位于每个客户罐的便宜的传感器/发送单元包括一个简单的传感器,它安装在油箱或现有燃料油位计上,微控制器电路和调制解调器电路。 微控制器电路使用简单的低稳定度振荡器作为内部操作和调制解调器传输频率的参考。 由于振荡器频率由于元件容差而无法精确地确定,并且具有大量的漂移,所以特殊的数据传输格式被用于微控制器和中央站之间的电话线上的数据传输。 数据格式包括标记和空格信号的选定图案,其中每个标记信号由振荡信号的预定数量的周期组成,振荡信号的频率由内部调制解调器振荡器确定,并且每个空间信号是没有信号的等效时间段 。 在接收机处,通过对预定位模式报头中的位时间进行平均来确定位持续时间。