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1. 发明授权

US5442291A Commutation device and control process using the same 失效
标题翻译：换向装置和控制过程使用相同
公开(公告)号：US5442291A
公开(公告)日：1995-08-15
申请号：US152026
申请日：1993-11-15
申请人： Jean-Max Tyburn , Alfred Niess , Tonio Gianotti
发明人： Jean-Max Tyburn , Alfred Niess , Tonio Gianotti
IPC分类号： G01R33/385 , G01R33/3875 , G01V3/00
CPC分类号： G01R33/3852 , G01R33/3875
摘要： Commutation device to connect and disconnect a current or voltage generator and a coil adapted to create a gradient of magnetic field in a measurement chamber of an NMR apparatus. The device comprises a switch (1) mounted in the supply circuit (2) of the coil (3), actuated by a control signal and adapted, in open position, to isolate totally the coil (3) from the generator (4). The switch is a double switch (1) adapted to separate, upon opening, the supply circuit (2) into a portion (5) connected to the generator (4) and a portion (6) connected to the coil (3), independently of each other. Alternatively the switch can be a high speed switch comprising at least one field effect transistor. The process for controlling the action of the coil comprises, at the end of an excitation phase and just before a measurement phase, sending an opening signal to the switch (1) so as to disconnect and to isolate from each other the generator (4) and the coil (3) and then, after a predetermined time lag, to trigger a measurement phase.
摘要翻译：用于连接和断开电流或电压发生器和适于在NMR装置的测量室中产生磁场梯度的线圈的换向装置。该装置包括安装在线圈（3）的供给电路（2）中的开关（1），由控制信号驱动，并且在打开位置适于将线圈（3）与发电机（4）完全隔离。开关是适于在供应电路（2）打开时分离成连接到发电机（4）的部分（5）和连接到线圈（3）的部分（6）的双开关（1），独立地的对方或者，开关可以是包括至少一个场效应晶体管的高速开关。用于控制线圈动作的过程包括在激励阶段结束之后并且恰好在测量阶段之前，向开关（1）发送打开信号以便断开并彼此隔离，发电机（4）和线圈（3），然后在预定的时间滞后之后触发测量阶段。

2. 发明授权

US4492524A Multiple piston pump with a constant discharge capacity 失效
标题翻译：多活塞泵具有恒定的放电容量
公开(公告)号：US4492524A
公开(公告)日：1985-01-08
申请号：US303057
申请日：1981-09-17
申请人： Dieter Koch , Tonio Gianotti
发明人： Dieter Koch , Tonio Gianotti
IPC分类号： F04B1/06 , F04B1/07 , F04B49/20 , G01N30/32 , F04B49/06 , F04B49/08
CPC分类号： G01N30/32 , F04B49/20 , G01N2030/326
摘要： A multiple piston pump with a constant discharge capacity for liquid chromatographs comprises at least three piston-cylinder units (1,2,3), whereof the pistons (7) are driven through a non-linear drive by a motor (23) with a mutual phase displacement of 360.degree./n, when n represents the number of piston-cylinder units. A regulating system varies the speed of the motor (23) during each period or cycle of the piston movement in such a manner as to compensate for the non-linear drive so that the pressure of the liquid conveyed during each period or cycle remains at least approximately constant. The motor (23) can be constructed as a stepping motor, which is supplied with current pulses whereof the frequency determines the speed of the motor.
摘要翻译：具有用于液相色谱仪的恒定放电容量的多活塞泵包括至少三个活塞 - 气缸单元（1,2,3），其中活塞（7）通过马达（23）通过非线性驱动被驱动，其中具有相位位移360°/ n，n表示活塞气缸单位数。调节系统在活塞运动的每个周期或周期期间改变马达（23）的速度，以补偿非线性驱动，使得在每个周期或循环期间输送的液体的压力保持至少大致恒定。电动机（23）可以被构造为步进电动机，其被提供有电流脉冲，其频率决定电动机的速度。

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