公开(公告)号：US5348570A

公开(公告)日：1994-09-20

申请号：US42934

申请日：1993-04-05

Applicant: Malcolm F. Ruppert, Jr. ,  Eric C. Liu

Inventor： Malcolm F. Ruppert, Jr. ,  Eric C. Liu

IPC: B01D19/00 ,  B01D53/22 ,  B01D29/05

CPC classification number: B01D19/0031 ,  F16H57/027 ,  F21V31/03 ,  A61M2039/205 ,  A61M39/20

Abstract: A venting mechanism which includes three members. A first member having threads defined thereon connected to a second offering a hexagonally shaped external surface. The third member features a bore which defines an annular surface at the intersection with a bore through the second member. A baffle is located within the bore of the second member by engagement with the annular surface defined between the second and third member. A Gortex film and a wire mesh placed within the bore of the third member are retained by a rolled lip thereof. In this manner, the baffle and the Gortex film act to maintain liquid on one side of the breather while allowing gases to freely pass therethrough.

Abstract translation: 一种排气机构，包括三个部件。 具有限定在其上的螺纹的第一构件连接到提供六边形形状的外表面的第二构件。 第三构件具有孔，该孔在与穿过第二构件的孔的交点处限定环形表面。 通过与限定在第二和第三构件之间的环形表面接合，挡板位于第二构件的孔内。 放置在第三构件的孔内的Gortex膜和丝网被其卷边保持。 以这种方式，挡板和Gortex膜用于在通气的一侧保持液体，同时允许气体自由地通过。

公开(公告)号：US5113094A

公开(公告)日：1992-05-12

申请号：US492763

申请日：1990-03-13

Applicant: Martin I. Grace ,  Peter M. Kapetanic ,  Eric C. Liu

Inventor： Martin I. Grace ,  Peter M. Kapetanic ,  Eric C. Liu

IPC: H03D7/02

CPC classification number: H03D7/02

Abstract: A method and apparatus comprising a sampler frequency converter having a first and a second diode. A local oscillator having a frequency F.sub.LO, a step recovery diode and a balun transformer are used for providing positive and negative sampling pulses to the diodes for sampling an input signal applied to the diodes having a frequency F.sub.IN. An output signal is provided by the diodes having a frequency F.sub.OUT which is defined by the relationship F.sub.OUT .vertline.F.sub.IN .+-.N.times.F.sub.LO .vertline. where N is an integer harmonic number 1, 2, 3 . . . and the output signal has an amplitude which varies as a function of (sin x)/x where x=F.sub.IN. A bandpass filter is provided which is responsive to the output signal for filtering a predetermined band of frequencies therefrom and a bias circuit is provided for forward biasing the diodes so that the frequency F.sub.IN of said input signal at which nulls occur in said (sin x)/x relationship occur at a lower frequency after said biasing than before said biasing.

Abstract translation: 一种包括具有第一和第二二极管的采样器频率转换器的方法和装置。 具有频率FLO，阶跃恢复二极管和平衡不平衡变压器的本地振荡器用于向二极管提供正和负采样脉冲，以对施加到具有频率FIN的二极管的输入信号进行采样。 输出信号由具有频率FOUT的二极管提供，频率FOUT由关系FOUT|FIN +/- NxFLO|定义，其中N是整数谐波数1,2,3。 。 。 并且输出信号具有作为（sin x）/ x的函数而变化的幅度，其中x = FIN。 提供带通滤波器，其响应于输出信号用于滤波预定的频带，并且提供偏置电路用于正向偏置二极管，使得所述输入信号的频率FIN在所述（sin x） / x关系发生在所述偏压之后的较低频率，而不是在所述偏压之前。