公开(公告)号：US4250477A

公开(公告)日：1981-02-10

申请号：US938649

申请日：1978-09-07

申请人： Frank J. Graninger ,  Robert J. Frey

发明人： Frank J. Graninger ,  Robert J. Frey

IPC分类号： H01H3/62 ,  H01H50/30 ,  H01H50/32 ,  H01H50/54 ,  H01H9/20 ,  H01F7/08

CPC分类号： H01H50/30 ,  H01H50/32 ,  H01H50/545 ,  H01H3/62

摘要： A mechanical latch attachment (20) for a control relay (21) includes a mechanical latch movement (77), a solenoid (49), and a pair of contact cartridges (33) that are disposed in a housing (25). The wear-resistant latch movement (77) has a latch (95) with teeth (103) on one end that are engaged by a pair of pivotable, hooked pawls (105). The latch (95) is coupled to an operating plunger (79) through a contact actuator (82). The operating plunger (79) can be coupled to a conventional control relay (21), which moves the plunger (79) upon the closing of its relay armature (30) to actuate the contacts (35, 36) in both the relay (21) and the attachment (20) and to move the latch (95) to a position where it is restricted by the pawls (105). The restriction of the latch (95) holds the relay armature (30) closed and the contacts (35, 36) actuated even though the relay (21) is deenergized. The solenoid (49) has an armature (62) that can be moved mchanically or electrically to release the latch (95) from the pawls (105). A high-compression spring (89) coupling the plunger to the contact actuator (82), protects the latch movement (77) from shock forces that might be encountered during shipment or abnormal handling. Relays with a mechanical latch attachment provide quiet operation and retain their operated state even in the event of a power failure.

摘要翻译： 用于控制继电器（21）的机械闩锁附件（20）包括设置在壳体（25）中的机械闩锁运动（77），螺线管（49）和一对接触盒（33）。 耐磨锁扣运动（77）具有在一端上具有齿（103）的闩锁（95），所述闩锁（95）由一对可枢转的钩状爪（105）接合。 闩锁（95）通过接触致动器（82）联接到操作柱塞（79）。 操作柱塞（79）可以联接到常规的控制继电器（21），其在其继电器电枢（30）关闭时使柱塞（79）移动以致动继电器（21）中的触点（35,36） ）和附件（20），并且将闩锁（95）移动到其被爪（105）限制的位置。 闩锁（95）的限制使继电器电枢（30）闭合，并且即使继电器（21）被断电也触发了触点（35,36）。 螺线管（49）具有可以机械地或电动地移动的衔铁（62），以从棘爪（105）释放闩锁（95）。 将柱塞联接到接触致动器（82）的高压缩弹簧（89）保护闩锁运动（77）免于在运输或异常处理期间可能遇到的冲击力。 具有机械闩锁附件的继电器提供安静的操作，并且即使在电源故障的情况下也保持其操作状态。

公开(公告)号：US09752403B1

公开(公告)日：2017-09-05

申请号：US14575324

申请日：2014-12-18

申请人： Robert J. Frey

发明人： Robert J. Frey

IPC分类号： E21B29/00 ,  E21B33/12 ,  E21B33/127 ,  E21B37/02 ,  E21B33/03

CPC分类号： E21B29/005 ,  E21B33/1243 ,  E21B33/138

摘要： An apparatus for remediating water wells comprises a plurality of retractable cutting blades suitable for cutting openings in a well casing. The retractable cutting blades and corresponding drive mechanism are organized to be lowered through a well casing. At certain depths, the retractable blades are extended to cut openings in the well casing. The apparatus also includes inflatable retention elements both above and below the retractable blades to create a fluid seal within the well casing. A solidifying, waterproof slurry is injected to flow through the openings via a slurry delivery mechanism, and thereby create a waterproof barrier outside the well casing at the level of a waterproof confining soil layer.