公开(公告)号：US4740295A

公开(公告)日：1988-04-26

申请号：US944444

申请日：1986-12-22

Applicant: Roby Bearden, Jr. ,  Clyde L. Aldridge ,  Francis X. Mayer ,  James H. Taylor ,  William E. Lewis

Inventor： Roby Bearden, Jr. ,  Clyde L. Aldridge ,  Francis X. Mayer ,  James H. Taylor ,  William E. Lewis

IPC: B01J23/28 ,  B01J27/19 ,  B01J37/20 ,  C10G47/26 ,  C10G47/02 ,  C10G1/08

CPC classification number: C10G47/26 ,  B01J23/28 ,  B01J27/19 ,  B01J37/20

Abstract: Hydroconversion processes utilizing a catalyst prepared from a catalyst precursor concentrate such as phosphomolybdic acid, is provided. The catalyst precursor concentrate is treated at relatively low pressures in a specified manner.

Abstract translation: 提供了使用由催化剂前体浓缩物如磷钼酸制备的催化剂的加氢转化方法。 催化剂前体浓缩物以指定的方式在相对低的压力下处理。

公开(公告)号：US4039759A

公开(公告)日：1977-08-02

申请号：US586614

申请日：1975-06-13

Applicant: James H. Taylor

Inventor： James H. Taylor

IPC: H04M1/70 ,  H04M1/738

CPC classification number: H04M1/70 ,  H04M1/738

Abstract: A line security device adapted for use in a conventional telephone instrument including a Zener diode tied by its cathode to the high, or the Tip, lead within the instrument, the anode of the Zener diode controlling, across a resistor, the base of a first NPN-PNP transistor pair which, in the manner of a silicon controlled rectifier, or SCR, controls the all or nothing conduction of a second composite pair. The controlling base of the first pair is tied across a capacitor to the low, or Ring, lead of the instrument and the emitter of the PNP transistor thereof drives the base of the second composite pair which is in circuit with the high, or Tip, signal lead. The Zener diode is selected to break down on high line signal levels corresponding to the instances when the instrument is off the line, e.g., prior to the closure of the hook switch of the instrument, and will not pass the lower line to turn on the first transistor pair once another instrument is connected across the line. The configuration of the second composite pair thus provides an all or nothing switch in the instrument circuit including at its output regenerative feedback to maintain the first pair latched on. To preclude various noise spikes from appearing at the receiver, the receiver circuit includes a PNP transistor emitter connected and base biased to the Tip lead output of the second composite pair and further controlled at the base by the output of the first pair.

公开(公告)号：US1173838A

公开(公告)日：1916-02-29

申请号：US3583315

申请日：1915-06-23

Applicant: JAMES H TAYLOR ,  MILLER ISRAEL

Inventor： MILLER ISRAEL

CPC classification number: A61H15/0085