公开(公告)号：US4253003A

公开(公告)日：1981-02-24

申请号：US911123

申请日：1978-05-31

申请人： David M. Evans ,  Edward J. Rogers

发明人： David M. Evans ,  Edward J. Rogers

IPC分类号： H01H3/30 ,  H01H3/32

CPC分类号： H01H3/3031

摘要： Disclosed is an improved high voltage switch operating mechanism which utilizes energy stored in a spiral spring to drive high voltage switches from either the open to the closed position or the closed to the open position. A spiral spring interconnects a rotatably mounted drive lever, which can be rotated to charge the sprial spring, and an output lever, which drives the switch either open or closed when the switch operating mechanism is tripped. A gearbox assembly reduces the torque required to charge the spiral spring when supplied either manually with a crank or electrically through a motor. The output lever is held in the switch-closed or the switch-opened position by improved first or second output lever latch assemblies, respectively, while the drive lever is rotated to charge the spring. Once the spiral spring is charged, first and second main latches engage the drive lever holding it in a spring charged position. The switch operating mechanism is tripped by releasing first or second output lever latch assemblies, which can be released manually by a single trip handle or by solenoids connected to control circuitry. When tripped, the spiral spring reacts against the output lever to either open or close the switch depending on the position of the switch at the initiation of the operation. After a switching operation is completed, the spring can be recharged for the next operation. Manual and electrical trip interlock assemblies are provided to prevent the switch operating mechanism from being tripped either manually or electrically while the spiral spring is being recharged either manually or electrically.

摘要翻译： 公开了一种改进的高压开关操作机构，其利用存储在螺旋弹簧中的能量来驱动高压开关从打开位置到闭合位置或闭合位置到打开位置。 螺旋弹簧互连可旋转地安装的驱动杆，其可旋转以对弹簧弹簧充电;以及输出杆，其在开关操作机构跳闸时驱动开关打开或关闭。 齿轮箱组件减少了当用曲柄手动地或通过电动机供电时为螺旋弹簧充电所需的扭矩。 输出杆通过改进的第一或第二输出杆闩锁组件分别保持在开关闭合或开关打开位置，同时驱动杆旋转以对弹簧充电。 一旦螺旋弹簧被充电，第一和第二主闩锁接合驱动杆，该驱动杆将其保持在弹簧充电位置。 开关操作机构通过释放第一或第二输出杆闩锁组件来跳闸，该闩锁组件可以由单个跳闸手柄或连接到控制电路的螺线管手动释放。 当跳闸时，螺旋弹簧响应于输出杆，以根据开关在操作开始时的位置来打开或关闭开关。 切换操作完成后，可以对弹簧进行充电以进行下一个操作。 提供手动和电动跳闸互锁组件，以防止开关操作机构手动或电动跳闸，同时螺旋弹簧手动或电动充电。

公开(公告)号：US4107487A

公开(公告)日：1978-08-15

申请号：US775905

申请日：1977-03-09

申请人： David M. Evans

发明人： David M. Evans

IPC分类号： H01H3/46 ,  H01H33/44

CPC分类号： H01H3/46 ,  Y10T74/20594

摘要： Disclosed is a switch suitable for use in power systems. The switch is of the vertical break type, having two stationary support insulators and one reciprocatory, insulative push rod, wherein movement of a switch blade takes place in a plane which also includes the insulators and the push rod. The two insulators are mounted on a base, one insulator supporting a switch blade hinge assembly, and the other insulator supporting a contact assembly for the switch blade. A novel linkage mounted to the hinge assembly connects the blade to the push rod and permits at least 90.degree. of movement of the blade without adversely affecting dielectric clearances between the push rod and the insulators. The insulators remain stationary when the switch operates, only the push rod and the novel linkage moving to provide motive force to the blade. The push rod may be reciprocated by interconnection to a rotatable shaft via a lever. The shaft may be connected to an operating pipe reciprocated by a remote operator to rotation therewith. After the switch is open, the novel linkage permits the push rod and the lever to form an over-center toggle which, together with the more than 90.degree. opening of the blade, prevents the blade from inadvertently moving toward engagement with the stationary contact as a result of external forces such as wind, etc. The switch and the linkage are usable in single pole and polyphase switches in a variety of configurations.

摘要翻译： 公开了一种适用于电力系统的开关。 该开关具有垂直断开型，具有两个固定支撑绝缘体和一个往复绝缘推杆，其中开关叶片的运动发生在还包括绝缘体和推杆的平面中。 两个绝缘体安装在基座上，一个绝缘体支撑开关叶片铰链组件，另一个绝缘体支撑开关叶片的接触组件。 安装到铰链组件的新型连杆将叶片连接到推杆，并且允许叶片的至少90°的运动，而不会不利地影响推杆和绝缘体之间的介电间隙。 当开关操作时，绝缘体保持静止，只有推杆和新型联动装置移动以向叶片提供动力。 推杆可以通过杠杆通过互连到可旋转轴而往复运动。 轴可以连接到由远程操作者往复运动的操作管以与其一起旋转。 在开关打开之后，新的联动装置允许推杆和杠杆形成一个超中心的肘节，其与刀片的大于90°的开口一起防止了刀片不经意地移动以与固定触点接合作为 外部力（如风等）的结果。开关和联动装置可用于各种结构的单极和多相开关。

公开(公告)号：US4779496A

公开(公告)日：1988-10-25

申请号：US842563

申请日：1986-03-21

申请人： David M. Evans ,  Clark B. Candee

发明人： David M. Evans ,  Clark B. Candee

IPC分类号： B23D21/14

CPC分类号： B23D21/14 ,  Y10T82/12 ,  Y10T82/16639 ,  Y10T83/0596 ,  Y10T83/392 ,  Y10T83/394

摘要： An improved tube cutting apparatus and method for cutting through the inside of a metallic tube is disclosed herein. The apparatus generally comprises a support assembly which is slidably insertable within a tube, a flail tube cutting head connected to a short flexible shaft, and a linking shaft rotatably mounted within the support assembly for connecting the short flexible shaft of the cutting head to a longer flexible drive shaft. The center portion of the housing includes a mandrel circumscribed by a selectively expandable resilient bladder for temporarily affixing the support assembly to the inner wall of the tube in order to position the circular blade of the cutting head adjacent to a desired point along the longitudinal axis of the tube. The proximal and distal portions of the linking shaft include coupling assemblies for facilitating blade changes. In order to confine the cutting action of the blade on the cutting head to a thin circle around the inner wall of the tube, the support assembly also includes a thrust bearing that prevents the blade from moving longitudinally during the cutting operation.

摘要翻译： 本文公开了一种用于切割金属管内部的改进的管切割装置和方法。 该装置通常包括可滑动地插入管内的支撑组件，连接到短柔性轴的连枷管切割头和可旋转地安装在支撑组件内的连接轴，用于将切割头的短柔性轴连接到更长的 柔性传动轴。 壳体的中心部分包​​括由可选择性地扩张的弹性囊包围的心轴，用于临时将支撑组件固定到管的内壁，以便将切割头的圆形刀片沿着所需切割点的纵轴 管子。 连接轴的近端部分和远端部分包括用于促进叶片变化的联接组件。 为了将切割头上的刀片的切割动作限制在围绕管的内壁的薄圆周，支撑组件还包括止推轴承，其在切割操作期间防止刀片纵向移动。

公开(公告)号：US4668162A

公开(公告)日：1987-05-26

申请号：US776322

申请日：1985-09-16

申请人： Philip J. Cederwall ,  David M. Evans ,  Boris Glezer ,  John J. Hensley

发明人： Philip J. Cederwall ,  David M. Evans ,  Boris Glezer ,  John J. Hensley

IPC分类号： B23B51/00 ,  B23B51/04 ,  F01D21/00 ,  F02C7/18 ,  F02C9/18 ,  F01D25/08

CPC分类号： B23B51/048 ,  F01D21/003 ,  F02C7/18 ,  Y10S415/912

摘要： Cooling air delivery systems for gas turbine engines are used to increase component life and increase efficiencies. To change the flow rate of cooling air in past engines, major disassembly of engine components was required resulting in the loss of the engine's service and excessive costs. With the changeable cooling air delivery system of the present invention, major engine disassembly is eliminated. An elongate member extends into a fluid control passage to establish a preselected flow area which can be changed. The time and expense required to change the cooling flow rate is drastically reduced because the elongate members are accessible external of the engine. The elongate member is removed from the engine and replaced by different elongate member having a different outer diameter of the stem or sleeve. The different diameter results in a new clearance or preselected flow area for cooling air to pass therethrough.

摘要翻译： 用于燃气涡轮发动机的冷却空气输送系统用于增加部件寿命并提高效率。 为了改变以往发动机的冷却空气流量，需要对发动机部件进行主要的拆卸，从而导致发动机的使用损失和成本过高。 利用本发明的可变冷却空气输送系统，消除了主要的发动机拆卸。 细长构件延伸到流体控制通道中以建立可以改变的预选流动区域。 改变冷却流速所需的时间和费用大大降低，因为细长构件可在发动机外部接近。 细长构件从发动机中移除并由具有不同外径的杆或套筒的不同细长构件代替。 不同的直径导致用于冷却空气通过的新的间隙或预选流动面积。

公开(公告)号：US4516569A

公开(公告)日：1985-05-14

申请号：US492034

申请日：1983-05-05

申请人： David M. Evans ,  Barry O. Weightman

发明人： David M. Evans ,  Barry O. Weightman

IPC分类号： A61B17/72 ,  A61F2/00 ,  A61F2/30 ,  A61F2/36 ,  A61F2/42 ,  A61F5/04

CPC分类号： A61B17/72 ,  A61F2/4241 ,  A61F2/30771 ,  A61F2002/30153 ,  A61F2002/30326 ,  A61F2002/30818 ,  A61F2002/30879 ,  A61F2002/30884 ,  A61F2230/0019 ,  A61F2250/0037

摘要： An intramedullary orthopaedic device for interconnecting bone fragments for union comprises an elongate member of plastics material having a relieved structure extending over its length but only partially therearound, each upstanding element being of transverse sizing to afford an interference fit by translation alone into a slightly undersized bone recess, such fit resulting from flexure of the elements without stripping bone material, and the unrelieved area of the member being of non-circular cross-section to inhibit rotation. The member is suitably of rectangular cross-section with sequences of fins having their longitudinal directions across the major side faces, and with the inter-sequence spacing and fin height each exceeding fin thickness.

摘要翻译： 用于连接用于联合的骨碎片的髓内矫形装置包括塑料材料的细长构件，其具有在其长度上但仅部分延伸的缓解结构，每个直立元件均具有横向尺寸以便通过单独平移到略小的骨头 凹陷，由于元件的弯曲而没有剥离骨材料而导致的这种配合，以及构件具有非圆形横截面以阻止旋转的未紧缩区域。 该构件适当地具有矩形横截面，其具有横跨主侧面的纵向方向的翅片序列，并且间隔间隔和翅片高度各自超过翅片厚度。

公开(公告)号：US4250476A

公开(公告)日：1981-02-10

申请号：US93668

申请日：1979-11-13

申请人： David M. Evans ,  Richard J. Sabis

发明人： David M. Evans ,  Richard J. Sabis

IPC分类号： H01H9/00 ,  H01H9/16

CPC分类号： H01H9/0066

摘要： An indicator is disclosed for a high voltage circuit interrupter having a stored-energy mechanism for biasing the contacts open.The interrupter has a shunt trip mechanism to open the contacts in response to either circuit conditions or a remote command, and a manual mechanism to trip the store-energy mechanism and to recharge and reset the store-energy mechanism. The indicator mimics the operation of the circuit interrupter and provide three signals indicating that the contacts are closed and the manual mechanism are between home and trip position, that the contacts open and the manual mechanism is either in the home or trip position, and that the contacts are open and the manual mechanism is between the trip and reset position or at the reset position. The indicators are preferably two lights with either light on or with both lights out.

摘要翻译： 公开了一种用于具有用于将触点打开的存储能量机构的高压断路器的指示器。 断路器具有分流跳闸机构，以响应于电路条件或远程命令来打开触点，以及手动机构来跳闸存储能量机制并对存储能量机构进行充电和复位。 指示灯模拟电路断路器的操作，并提供三个信号，指示触点闭合，手动机构位于原点位置和跳闸位置之间，触点断开，手动机构处于原位或跳闸位置， 触点打开，手动机构位于跳闸和复位位置或复位位置。 指示灯最好是两个灯，两个灯都亮起或两个灯熄灭。

公开(公告)号：USD256355S

公开(公告)日：1980-08-12

申请号：US901966

申请日：1978-05-01

申请人： David M. Evans ,  Joel A. Ramos

设计人： David M. Evans ,  Joel A. Ramos

公开(公告)号：USD256353S

公开(公告)日：1980-08-12

申请号：US901968

申请日：1978-05-01

申请人： David M. Evans

设计人： David M. Evans

公开(公告)号：US4107602A

公开(公告)日：1978-08-15

申请号：US727817

申请日：1976-09-29

申请人： David M. Evans

发明人： David M. Evans

IPC分类号： G01R19/145 ,  G01R31/04 ,  G01R31/02

CPC分类号： G01R19/145 ,  G01R31/041

摘要： A fuse safety tester apparatus utilizing a pair of neon light bulbs to test the wiring connections of a fuse receptacle in the active power circuit of a unit under test.

摘要翻译： 一种保险丝安全测试仪，利用一对氖灯来测试被测单元的有功功率电路中的保险丝插座的接线。

公开(公告)号：US4107486A

公开(公告)日：1978-08-15

申请号：US701064

申请日：1976-06-30

申请人： David M. Evans

发明人： David M. Evans

IPC分类号： H01H3/22 ,  H01H31/00

CPC分类号： H01H3/227

摘要： A three-phase, high voltage switch arrangement is operated through a connected drive shaft by a switch operating mechanism that can be either driven by motor power or manually operated. When manual operation is desired, a crank handle is folded out of a stored position to an operating position. An improved mechanism is provided to prevent the crank handle from operably engaging the switch operating mechanism until stored torsional energy (i.e., the potential energy due to torsional strain) in the drive shaft has been released thereby avoiding improper operation, such as unexpected whipping of the handle. In addition, when the crank handle is folded out to its operating position, the motor is disabled so that the motor can not be operated while the handle is engaged with the mechanism so that the handle cannot be driven by the motor. When it is desired to disconnect the switch operating mechanism from the switch so that maintenance and testing can be performed, a selector handle may be operated that disconnects the drive shaft from the operating mechanism and locks the drive shaft so that the switch cannot be accidentally opened or closed due to wind or vibrational forces. Also, while the selector handle is being operated, the motor cannot be operated while the drive shaft is being disconnected and locked.

摘要翻译： 三相高压开关装置通过连接的驱动轴由开关操作机构操作，开关操作机构可以由电机驱动或手动操作。 当需要手动操作时，将曲柄手柄从存储位置折叠到操作位置。 提供改进的机构以防止曲柄手柄可操作地接合开关操作机构，直到已经释放驱动轴中存储的扭转能量（即，由于扭转应变引起的潜在能量），从而避免不正确的操作，例如不期望的鞭打 处理。 此外，当曲柄手柄折叠到其操作位置时，电动机被禁用，使得电动机在手柄与机构接合时不能被操作，使得手柄不能被电动机驱动。 当需要将开关操作机构与开关断开以进行维护和测试时，可以操作选择器手柄，其将驱动轴与操作机构断开并锁定驱动轴，使得开关不会被意外打开 或由于风或振动力而关闭。 此外，当选择器手柄被操作时，在驱动轴被断开和锁定时，电机不能被操作。