公开(公告)号：US4985385A

公开(公告)日：1991-01-15

申请号：US412298

申请日：1989-09-25

申请人： Alan Williams ,  John D. Wilson ,  Roger D. Wragg ,  Stephen D. Jones ,  Costa Komodromos ,  Timothy J. Reynolds

发明人： Alan Williams ,  John D. Wilson ,  Roger D. Wragg ,  Stephen D. Jones ,  Costa Komodromos ,  Timothy J. Reynolds

IPC分类号： B01J23/74 ,  B01J21/16 ,  B01J23/755 ,  B01J23/76 ,  B01J23/78 ,  B01J23/86 ,  B01J27/20 ,  C01B33/20 ,  C07B61/00 ,  C07C1/02 ,  C07C4/06 ,  C07C9/04 ,  C10K3/04

CPC分类号： C07C1/02 ,  B01J21/16 ,  B01J23/755 ,  B01J23/78 ,  C07C2521/10 ,  C07C2521/16 ,  C07C2523/02 ,  C07C2523/04

摘要： A catalyst precursor is prepared by intimately mixing a nickel-aluminium Feitknecht compound with a non-calcined aluminosilicate clay mineral and at the same time and/or subsequently with at least one additive comprising an alkaline earth and/or rare earth metal compound. The resulting mixture is then calcined to produce the catalyst precursor which can be reduced to the catalyst form. The catalyst may be used, for example, in the methanation of gases and the presence of the additive reduces silicon species loss from the catalyst during use.

公开(公告)号：US4760515A

公开(公告)日：1988-07-26

申请号：US791647

申请日：1985-10-28

申请人： Carl A. Malmquist ,  John D. Wilson

发明人： Carl A. Malmquist ,  John D. Wilson

IPC分类号： G06F15/16 ,  G06F13/14 ,  G06F13/30 ,  G06F13/362 ,  G06F13/364 ,  G06F15/177 ,  G06F13/18

CPC分类号： G06F13/30 ,  G06F13/14 ,  G06F13/364

摘要： An arbitration apparatus for use within a computer system comprises a plurality of individual arbiters arranged in a particular configuration wherein some individual arbiters are higher in the particular configuration than a specific arbiter and some individual arbiters are lower in the particular configuration than the specific arbiter. Each arbiter has a request terminal for receiving access request signals, requesting access to a shared system bus, and an enable terminal for receiving an enabling signal. The enabling signal is generated and energizes the enable terminal of the specific arbiter if access requests are not received by higher arbiters in the particular configuration relative to the specific arbiter. If an access request signal energizes an arbiter and an enabling signal energizes the arbiter, an access grant signal is developed from the arbiter. If more than one access request signal energizes the arbiter at the same time, a command rotor, connected to the arbiter, determines the priority of access of the request signals to the shared bus in response to the "rotation" of the command rotor. If the access request signal is of a predetermined type, a pre-emptive grant signal may be developed from its arbiter even in the absence of an access request if there are no higher requests and no lower grants. If a refresh request is received by an arbiter when its enabling signal is not received, the refresh request is latched, and a refresh takes place when the enabling signal is finally generated.

摘要翻译： 在计算机系统内使用的仲裁装置包括以特定配置排列的多个单独仲裁器，其中特定配置中的一些单独仲裁器比特定仲裁器更高，并且某些单独仲裁器在特定配置中比特定仲裁器更低。 每个仲裁器具有用于接收访问请求信号的请求终端，请求访问共享系统总线，以及用于接收使能信号的使能终端。 如果访问请求在特定配置中相对于特定仲裁器没有被较高仲裁者接收，则产生使能信号并且激励特定仲裁器的使能终端。 如果访问请求信号激励仲裁器，并且使能信号激励仲裁器，则从仲裁器开发访问许可信号。 如果多于一个访问请求信号同时给仲裁器通电，则连接到仲裁器的命令转子响应于命令转子的“转动”确定请求信号对共享总线的访问的优先级。 如果访问请求信号是预定类型的，即使没有更高的请求也没有较低的授权，即使没有访问请求，也可以从其仲裁器开发优先授权信号。 如果仲裁器在其接收到使能信号时接收到刷新请求，则刷新请求被锁存，并且当最终产生使能信号时，进行刷新。

公开(公告)号：US628998A

公开(公告)日：1899-07-18

申请号：US1896591559

申请日：1896-05-14

申请人： JOHN D WILSON

发明人： JOHN GARLAND B ST

CPC分类号： A47J19/04