公开(公告)号：US5032772A

公开(公告)日：1991-07-16

申请号：US445507

申请日：1989-12-04

申请人： Wilfred J. Gully ,  Paul M. Okada

发明人： Wilfred J. Gully ,  Paul M. Okada

IPC分类号： F25B9/14 ,  F25B49/02 ,  H02P7/00

CPC分类号： F25B49/022 ,  F25B9/14 ,  H02P7/03 ,  F25B2309/001 ,  F25B2309/1428

摘要： A direct current powered, linear resonant cryocooler having a compressor in which the piston is reciprocated by a linear motor at substantially resonant frequency and the length of stroke of the piston is varied as a direct function of cryocooler temperature. There are two control loops, a temperature control loop and a voltage control loop which is independent of the temperature control loop. In the temperature control loop, temperature is sensed at the cryocooler or expander and the temperature signal is compared with a reference temperature signal to produce a temperature error signal or voltage. The voltage control loop controls motor voltage. As input to the voltage control loop, the linear motor voltage is fed back and compared with the temperature error voltage V.sub.TE to produce a voltage level signal V.sub.L in the input of the voltage control loop, representative of the correction required to obtain and then to maintain the cryocooler temperature represented by the reference temperature voltage. Either a pulse width modulated, variable amplitude sine wave signal or a constant duty cycle, pulse width modulated, square wave signal powers the linear motor.

摘要翻译： 具有压缩机的直流供电的线性谐振低温冷却器作为低温冷却器温度的直接函数而变化，其中活塞通过线性电动机以基本共振频率往复运动，活塞的行程长度变化。 有两个控制回路，一个温度控制回路和一个独立于温度控制回路的电压控制回路。 在温度控制回路中，在低温冷却器或膨胀器处感测温度，并将温度信号与参考温度信号进行比较，以产生温度误差信号或电压。 电压控制回路控制电机电压。 作为电压控制回路的输入，反馈线性电动机电压并与温度误差电压VTE进行比较，以在电压控制回路的输入端产生电压电平信号VL，代表获得然后维持所需的校正 低温冷却器温度由参考温度电压表示。 脉冲宽度调制，可变幅度正弦波信号或恒定占空比，脉冲宽度调制，方波信号为线性电机供电。

公开(公告)号：US5499428A

公开(公告)日：1996-03-19

申请号：US188938

申请日：1994-01-31

申请人： Paul M. Okada

发明人： Paul M. Okada

IPC分类号： E05D5/02 ,  E05D11/06

CPC分类号： E05D5/0246 ,  E05D11/06 ,  E05D15/54 ,  E05D2005/0253 ,  E05D2005/0269 ,  E05Y2800/162 ,  E05Y2900/132 ,  Y10T16/52 ,  Y10T16/551 ,  Y10T16/558 ,  Y10T16/559

摘要： A flush hinge for pivotally connecting a door to an adjacent wall wherein first and second hinge members are connected by a pintle to move about a pivot axis. The pivot axis is substantially centered in the width dimension of each of the first and second knuckle portions and an inside face of each knuckle portions forms a stop face for the door or wall to position them inside the pivot axis so the ends of the hinge members remain in close proximity as the first hinge member moves. The first and second hinge members have a tongue and groove fitting and stop faces that abut to hold the hinge member in both open and closed positions. In a first embodiment the pivot axis is substantially centered between adjacent edges of the door and walls with an inner face of the hinge being in the same plane as the door and wall to fill a gap therebetween. The first embodiment has a base portion that extends into a hollow wall support and fastens to the inside thereof. A second embodiment has a base portion that fastens to a wall fin substantially centered in the gap and forms a part of the playing surface. A third embodiment has a base portion projecting rearwardly of the stationary second leaf portion, attaches to the back side of a support fin and utilizes a notch in the wall.

摘要翻译： 一种用于将门枢转地连接到相邻壁的齐平铰链，其中第一和第二铰链构件通过枢轴连接以围绕枢转轴线移动。 枢转轴线基本上位于第一和第二转向节部分的每一个的宽度尺寸中心，并且每个转向节部分的内侧面形成用于门或壁的止动面以将它们定位在枢转轴线内，使得铰链部件的端部 当第一铰链构件移动时保持紧邻。 第一和第二铰链构件具有榫舌和凹槽配合以及止动面，其邻接以将铰链构件保持在打开和关闭位置。 在第一实施例中，枢转轴线基本上位于门的相邻边缘和壁之间，其中铰链的内表面在与门和壁相同的平面中以填补它们之间的间隙。 第一实施例具有延伸到中空壁支撑件中并固定到其内部的基部。 第二实施例具有紧固到基本上位于间隙中心的壁翅片并形成播放表面的一部分的基部。 第三实施例具有从固定的第二叶片部分向后突出的基部，附接到支撑翅片的后侧并利用壁中的切口。

公开(公告)号：US5297368A

公开(公告)日：1994-03-29

申请号：US881334

申请日：1992-05-11

申请人： Paul M. Okada

发明人： Paul M. Okada

IPC分类号： E04H3/14 ,  E04B2/82

CPC分类号： E04H3/14

摘要： A movable wall system for athletic courts makes the same court suitable for both racquetball, handball and squash play. The system disclosed includes a movable wall assembly between the front wall and back support structure at the back. Extensible and retractable side linkage assemblies connect between the movable wall assembly and back support structure that will stabilize the wall during movement. Side rollers and bottom rollers on the wall assembly facilitate sliding movement. Slide bolt catches hold the wall against movement in either the retracted or extended positions and latching mechanisms hold the wall assembly to the back wall in the retracted position.

摘要翻译： 运动场地的活动墙系统使得同一个场地适合于壁球，手球和壁球运动。 所公开的系统包括在后壁上的前壁和后支撑结构之间的可动壁组件。 可伸缩的侧连接组件连接在活动壁组件和后支撑结构之间，这将在运动期间稳定壁。 墙壁组件上的侧面滚轮和底部滚轮有助于滑动。 滑动闩锁抓住墙壁抵抗在缩回或伸出位置的移动，并且闩锁机构在缩回位置处将墙壁组件固定到后壁。