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公开(公告)号：US4869553A
公开(公告)日：1989-09-26
申请号：US268848
申请日：1988-11-09
申请人： Robert A. Powell
发明人： Robert A. Powell
摘要： A collapsible chair formed from sheet material including a seat panel, a back panel foldably connected to the seat panel, a reinforcement panel in registry with a portion of the back panel, a support panel foldably attached to the reinforcement panel, and projections extending from the back and support panels insertable in the ground to maintain the chair in set-up condition.
摘要翻译： 一种由片材形成的可折叠椅子，包括座板，可折叠地连接到座板的后面板，与后面板的一部分对准的加强板，可折叠地附接到加强板的支撑板，以及从该板 背部和支撑板可插入地面，以保持椅子处于安装状态。
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公开(公告)号：US5968216A
公开(公告)日：1999-10-19
申请号：US65004
申请日：1998-04-23
CPC分类号： F24F13/02 , F24F13/084 , F24F13/28 , F24F2007/003
摘要： A security vent is mountable to an existing air duct inlet opening and includes a housing assembly having a mounting frame fixedly secured to an inlet end of an air duct and a housing wall fixedly secured to the mounting frame by at least one side wall portion. The housing wall includes a front face being in spaced relation to the mounting frame and includes a perforated front face thereof. The mounting frame includes an opening therethrough which cooperates with the perforated front face of the housing wall permit flow communication of the air duct through the security vent. The housing wall cooperates with the mounting frame to define a filter-receiving region therebetween. A door is hingedly attached to an open side wall and is moveable between an open position and a closed position. A latch assembly is fixedly attached to the door and is moveable between a locked position and an unlocked position. The latch assembly is receivable by a latch-receiving aperture in the mounting frame to lock the door in the closed position. The filter-receiving region communicates through the open side wall to receive a filter therein.
摘要翻译： 安全通风口可安装到现有的空气管道入口开口，并且包括壳体组件，其具有固定地固定到空气管道的入口端的安装框架和通过至少一个侧壁部分固定地固定到安装框架的壳体壁。 壳体壁包括与安装框架间隔开的前表面，并且包括其穿孔前表面。 安装框架包括与壳体壁的穿孔前表面配合的通孔，允许空气管道通过安全通气口的流动连通。 壳体壁与安装框架配合以在其间限定过滤器接收区域。 门被铰接地连接到敞开的侧壁上并且可以在打开位置和关闭位置之间移动。 闩锁组件固定地附接到门，并且可在锁定位置和解锁位置之间移动。 闩锁组件可由安装框架中的闩锁接收孔接收，以将门锁定在关闭位置。 过滤器接收区域通过开放侧壁连通以在其中接收过滤器。
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公开(公告)号：USD267741S
公开(公告)日：1983-01-25
申请号：US279241
申请日：1981-06-29
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4.发明授权Method for ventilating secure facility and system and apparatus used therefor 失效通风安全设施及其使用的系统和设备的方法公开(公告)号：US06371846B1
公开(公告)日：2002-04-16
申请号：US09573002
申请日：2000-05-17
IPC分类号： F24F1328
CPC分类号： F24F13/28 , F24F13/02 , F24F13/084
摘要： A security vent includes a housing, a drawer and a latch. The housing includes first and second ends defining a passageway in which the drawers receive. The drawer includes a filter receiving slot. The drawer is movable in and out of the passageway to provide access to the filter receiving slot such that a filter can be inserted and removed therefrom. The latch assembly allows the drawer to be locked in a closed position and unlocked for opening. In another embodiment of the invention, a security vent mountable to the existing air duct inlet opening includes a housing assembly having a mounting frame and a housing wall secured to the mounting frame. The housing wall includes a front faced space from the mounting frame. The front face is perforated. The housing wall and mounting frame define a filter receiving region for holding an air filter. A door is secured to the housing wall and may be moved between an open position and a closed position to either permit or prevent access to and from the filter receiving region. The vent further includes a latch assembly for locking the door in a closed position. In another embodiment of the invention, a system for ventilating an enclosed region includes a secure vent affixed to the wall of the region, the vent including a removable filter. An access door is provided and is movable between a closed position and an open position to either permit or prevent access to the filter.
摘要翻译： 安全通风口包括壳体，抽屉和闩锁。 壳体包括限定抽屉接收的通道的第一端和第二端。 抽屉包括过滤器接收槽。 抽屉可移动进出通道以提供对过滤器接收槽的通路，从而可以将过滤器插入和移出过滤器。 闩锁组件允许抽屉被锁定在关闭位置并且被解锁用于打开。 在本发明的另一个实施例中，可安装到现有空气管道入口的安全通风口包括壳体组件，其具有安装框架和固定到安装框架的壳体壁。 壳体壁包括从安装框架的前面空间。 前面是穿孔的。 壳体壁和安装框架限定用于保持空气过滤器的过滤器接收区域。 门被固定到壳体壁上并且可以在打开位置和关闭位置之间移动，以允许或阻止进入和离开过滤器接收区域。 通风口还包括用于将门锁定在关闭位置的闩锁组件。 在本发明的另一个实施例中，用于对封闭区域进行通风的系统包括固定在该区域的壁上的固定通风口，该排气口包括可移除的过滤器。 提供检修门，并可在关闭位置和打开位置之间移动，以允许或阻止进入过滤器。
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公开(公告)号：US5875700A
公开(公告)日：1999-03-02
申请号：US971454
申请日：1997-11-17
申请人： Robert A. Powell
发明人： Robert A. Powell
CPC分类号： A01D34/73 , Y10S56/20 , Y10T83/9319 , Y10T83/9324
摘要： A circular brush cutting blade with peripheral cutting teeth. Segments are bent or deflected out of the blade body at an angle to the plane of the blade less than normal. The segments are configured to provide an inclined leading edge for each segment that cuts a laterally extended path with movement of the blade laterally or axially. The segments produced by folding the segments around a base line or juncture with the blade body whereby the opening through the blade created thereby is radially outward of the juncture.
摘要翻译： 圆形刷切割刀片，带周边切割齿。 片段与叶片的平面成角度相对于叶片的平面弯曲或弯曲偏离正常。 这些段被构造成为每个段提供倾斜的前缘，该前缘横向或轴向地沿刀片的移动而切割横向延伸的路径。 通过将片段围绕基线或接合部与刀片体折叠而产生的片段，由此由此产生的刀片的开口在接合部的径向外侧。
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公开(公告)号：US5020854A
公开(公告)日：1991-06-04
申请号：US586145
申请日：1990-09-21
申请人： Robert A. Powell
发明人： Robert A. Powell
摘要： A folding chair formed from sheet material including a seat panel, a back panel, a support panel, an end panel, and brace panels connected to the support panel and extending between the back panel and end panel.
摘要翻译： 一种由板材形成的折叠椅，包括座板，后面板，支撑板，端面板和连接到支撑板并且在后板和端板之间延伸的支撑板。
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公开(公告)号：USRE38121E1
公开(公告)日：2003-05-20
申请号：US09449686
申请日：1999-11-24
IPC分类号： F24F1328
CPC分类号： F24F13/085 , F24F13/02 , F24F13/084 , F24F13/28 , F24F2007/003
摘要： A security vent, providing a housing assembly mounted to a support, the housing assembly including a side wall portion having first and second distal ends thereof and defining a passageway therebetween; a drawer assembly having a filter-receiving slot therein, the drawer assembly being slidingly received by the housing assembly second distal end, the drawer assembly being moveable within the housing assembly passageway between an open position and a closed position, wherein the filter-receiving slot is disposed within the housing assembly when the drawer assembly is in the closed position, and wherein the filter-receiving slot is in communication with a region outside the housing support when the drawer assembly is in the open position; and, a latch assembly mounted to the housing assembly, the latch assembly being moveable between a locked position and an unlocked position, the latch assembly being received by a latch-receiving notch provided in the drawer assembly when the drawer assembly is in the closed position and the latch assembly is in the locked position.
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公开(公告)号：US5202636A
公开(公告)日：1993-04-13
申请号：US658939
申请日：1991-02-22
申请人： Robert A. Powell
发明人： Robert A. Powell
IPC分类号： G01R31/44
CPC分类号： G01R31/44
摘要： A system for testing electrical lamps includes a hollow cylinder. Lamps are placed in the hollow cylinder and the light emitted from the lamp is focused onto a phototransistor by a focusing lens. The output of the phototransistor is measured against the electrical voltage input into the lamp. If the output of the phototransistor lags behind the input voltage to the lamp by more than a predetermined amount, the lamp is rejected.
摘要翻译： 用于测试电灯的系统包括中空圆筒。 灯放置在中空圆筒中，从灯发出的光通过聚焦透镜聚焦到光电晶体管上。 光电晶体管的输出是根据输入到灯中的电压来测量的。 如果光电晶体管的输出落后于灯的输入电压超过预定量，则灯被拒绝。
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公开(公告)号：US4492895A
公开(公告)日：1985-01-08
申请号：US422005
申请日：1982-09-23
申请人： Robert A. Powell
发明人： Robert A. Powell
摘要： An incandescent lamp for use in the headlamp of an automotive vehicle includes a low beam and a high beam filament mounted in a gas-filled, sealed envelope. The filaments are generally parallel, in closely adjacent, overlapping physical relation and each filament includes first and second similarly positioned ends. The lamp is electrically connected to the positive and negative terminals of the vehicle battery via a switch for energizing the high beam filament momentarily in a "flash to pass" mode while the low beam filament remains energized. The filaments are wired with the first end of the low beam filament and second end of the high beam filament being connected to the negative terminal of the battery and the first end of the high beam filament and second end of the low beam filament connected to the positive terminal of the battery to avoid arcing between filaments which occurs in prior art lamps of this type during initial operation of the low beam filament and "flash to pass" operation of the high beam filament.
摘要翻译： 用于机动车辆前照灯的白炽灯包括安装在填充气体的密封外壳中的近光灯和远光灯丝灯。 细丝通常是平行的，紧密地相邻重叠的物理关系，并且每个细丝包括第一和第二类似定位的端部。 灯经由开关电连接到车辆电池的正端子和负极端子，以在短波灯丝保持通电的同时以“闪光通过”模式瞬时激励远光灯丝。 灯丝与短波束灯丝的第一端连接，远光灯丝的第二端连接到电池的负极端子，而远光灯丝的第一端和连接到灯管的远光灯丝的第二端 电池的正极端子，以避免在近光灯丝的初始操作期间发生在这种类型的现有技术灯中发生的细丝之间的电弧并且“快速通过”远光灯丝的操作。
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公开(公告)号：USD623489S1
公开(公告)日：2010-09-14
申请号：US29314171
申请日：2009-03-10
申请人： Robert A. Powell , Joyce A. Powell
设计人： Robert A. Powell , Joyce A. Powell
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