公开(公告)号：US4766941A

公开(公告)日：1988-08-30

申请号：US871846

申请日：1986-06-09

Applicant: David J. Sloop ,  Hsiang-Lin Yu

Inventor： David J. Sloop ,  Hsiang-Lin Yu

IPC: E06B9/24 ,  E06B9/40 ,  E06B9/72 ,  A47G5/02

CPC classification number: E06B9/72 ,  E06B9/24 ,  E06B9/40 ,  E06B2009/405

Abstract: An electrically powered window shade with selectively variable shading characteristics is installable within a window opening for selectively blocking (by absorption or reflection), filtering and/or transmitting light through the window shade into a room for purposes of energy control and/or decoration, etc. This window shade comprises an upper roller assembly, a lower roller assembly, and an elongate flexible web wound on the upper and lower roller assemblies, with the web being longer than the spacing between the upper and lower roller assemblies. Each of the roller assemblies comprises an elongate tubular roller, bearings engageable with the end of the roller for rotatably journaling the ends of the roller with respect to the window. The web is scrolled onto and from the rollers as the latter are rotated about their respective longitudinal axes. A drive is provided for each of the rollers so as to drive the rollers in one direction or the other so as to scroll the web from one of the rollers onto the other roller. The drive comprises a gearmotor having an output shaft substantially coaxial with the gearmotor, and with the gearmotor being received within the roller, with the output shaft being coaxial with the roller. The gear motor is fixed against rotation with respect to the frame. Further, each of the gearmotors includes a torsional spring for maintaining the web taut as it is scrolled and unscrolled from one roller to the other, and while the web is stationary and to accommodate changes in rotation rates and roll diameters as the web is scrolled and unscrolled. Specifically, this torsional spring operatively connects the output shaft of each gearmotor with its respective roller. The torsional spring of one of the rollers is wound in one direction (e.g., clockwise), and the other torsional spring associated with the other gearmotor is wound in the other direction (e.g., counterclockwise) so that upon initial energization of one gearmotor or the other, differences in rotational speed and start-up times between the gearmotors will be taken up.

公开(公告)号：US5815864A

公开(公告)日：1998-10-06

申请号：US626361

申请日：1996-04-02

Applicant: David J. Sloop

Inventor： David J. Sloop

IPC: A47C27/10 ,  A61G7/057 ,  A47C27/08

CPC classification number: A61G7/05769 ,  A61G7/05784 ,  A61G2203/34 ,  A61G2203/40

Abstract: An air pressurization and control system for a low air loss air floatation mattress or cushion is disclosed. The control system controls air supplied to the air floatation mattress within a range of pressures and flowrates so as to inflate all of the cells of the mattress and to maintain a flow of air to all of the cells over an extended period of time while maintaining all of the cells at a desired level of inflation for the air floatation support of the patient without any of the cells exerting decubitus pressures above the maximum desired decubitus pressure and so as to prevent collapse of any of the cells. A sensor is provided for sensing the pressure of the air within the common supply. The controller includes a microprocessor for initializing the controller to a particular patient to be supported by the mattress and for the air floatation support of the patient over an extended period of time without exceeding a maximum decubitus pressure on any portion of the person's body in contact with the mattress and without permitting any of the cells to collapse. The initializing procedure comprises inflating the mattress with the person supported thereon and determining when at least one of the cells becomes fully inflated thereby determining a maximum inflation pressure not to be exceeded during the course of treatment and then deflating the mattress and determining the pressure at which at least one of the cells collapses thereby determining a lower pressure level above which pressure within the mattress is to be maintained during the course of treatment. The controller monitors the pressure of the air supplied to the common source and regulates operation of the source of pressurized air so as to be at a predetermined pressure between the minimum and the maximum pressure.

Abstract translation: 公开了一种用于低空气损失气浮床垫或衬垫的空气加压和控制系统。 控制系统控制在一定范围的压力和流量范围内供应到空气浮床的空气，以便使床垫的所有细胞充气并且在延长的时间段内保持空气流向所有细胞，同时保持全部 的细胞在患者的空气浮动支持物的期望水平下，而不会使褥疮压力超过最大所需褥疮压力，并且防止任何细胞崩溃。 提供传感器用于感测公共电源内的空气压力。 控制器包括微处理器，用于将控制器初始化到特定患者以由床垫支撑并且在延长的时间段内对患者的空气浮动支持进行初始化，而不超过与人体接触的任何部分上的最大褥疮压力 床垫，并且不允许任何细胞崩溃。 初始化过程包括使床垫与其上的人充气并确定何时至少一个细胞变得充分膨胀，从而确定在治疗过程中不被超过的最大充气压力，然后使床垫放气并确定 至少一个细胞崩溃，从而确定在治疗过程中在床垫内保持压力的较低压力水平。 控制器监视供给到共同源的空气的压力，并且调节加压空气源的操作，使其处于最小和最大压力之间的预定压力。

公开(公告)号：US3934176A

公开(公告)日：1976-01-20

申请号：US515168

申请日：1974-10-16

Applicant: Karappurath Vasudevan ,  David J. Sloop

Inventor： Karappurath Vasudevan ,  David J. Sloop

IPC: H02H11/00 ,  H02H3/16

CPC classification number: H02H11/001

Abstract: Safety control apparatus of substantially improved reliability and sensitivity is provided for detecting faults and automatically deenergizing electrically powered mobile or portable equipment, such as mining machinery, which is energized in the field by means of relatively long cables often carrying high voltage electrical power from a sub-station, in the event of either a short circuit between a sensing conductor and ground or any failure of the ground connection included in the system to protect the operators of the equipment and the equipment itself. The improved safety apparatus is further characterized by its ability to respond to detected faults so quickly as to virtually eliminate any chance for operator injury or damage to equipment, even when very high voltage power is being used. Although the apparatus responds to both ground interruption (or high resistance to ground) and the mentioned type of short faults in a highly sensitive manner, it is essentially immune to the effects of induced transients such as have plagued the reliability of prior safety systems for the same general purpose.

Abstract translation: 提供了大大提高的可靠性和灵敏度的安全控制装置，用于检测故障并自动断电电动移动或便携式设备，例如采矿机械，其通过相对较长的电缆在现场通电，该电缆通常承载高压电力 在感测导体和地面之间发生短路或系统中包含的接地连接故障​​，以保护设备和设备本身的操作者的情况下。 改进的安全装置的特征还在于其能够快速响应检测到的故障，甚至在使用非常高的电压功率时实际上消除了操作人员伤害或设备损坏的任何机会。 虽然该装置以高度敏感的方式对接地中断（或高抗地电阻）和上述类型的短路故障作出响应，但其本质上不受诱发瞬变的影响，例如困扰了现有安全系统的可靠性 相同的通用目的。