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...that Kleenex tissue was originally designed to be a gas mask filter? It was developed at the beginning of World War I to replace cotton, which was then in short supply as a surgical dressing.
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| Number | Title | Issue Date |
| 7223928 | Switch with improved protection from ice conditions An arrangement is provided to protect an electrical switch from the deleterious effects of ice formation that inhibits switch operation. In a preferred arrangement, an ice shield is provided that protects the current-carrying contact structures and other operative e... | 05/29/2007 |
| 7111510 | Liquid level detection device A liquid level detecting apparatus having detachable terminals and capable of holding down the formation of silver sulfide is provided. The apparatus includes a movable contact displaced in accordance with the fluctuation of a liquid level, electrodes slidingly cont... | 09/26/2006 |
| 7091431 | Disconnect switch A switch has a first electrical terminal, a second electrical terminal spaced from the first electrical terminal and an elongate conductive switch blade for bridging the terminals. The switch blade has a first end portion pivotally connected with the first electrica... | 08/15/2006 |
| 7027957 | Current interrupter assembly A method for determining the influence of one of a plurality of cathodic protection circuits along a pipeline includes switching one of a plurality of cathodic protection circuits off, while the remainder of the plurality of cathodic protection circuits are left on,... | 04/11/2006 |
| 6946607 | Resistance assembly for hookstick operated switching assembly A resistance assembly having a resistance member prevents accidental movement of a hookstick operated switching assembly. A switch assembly of the hookstick operated switching assembly is mounted on a base. The resistance member includes a lever connected to the swi... | 09/20/2005 |
| 6818846 | Overtoggled interrupter switch assembly A group operated overhead switch for high voltage power lines includes a rotatable overtoggle mechanism linked to a control shaft and a plurality of switch phases secured to a crossarm support. The overtoggle mechanism may be rotated to and from a closed position an... | 11/16/2004 |
| 6570117 | Air-insulated high-voltage disconnector An air-insulated high-voltage disconnector includes a pivoting arm which pivots at one end about a horizontal axis perpendicular to the axis of the arm and turns about its axis. The free end of the arm carries a contact member referred to as the hammer co... | 05/27/2003 |
| 6541717 | Locking assembly for a switch assembly A hookstick operated switch assembly includes a switch mounted to a support and movable between open and closed positions. An operating lever is connected to the switch for opening and closing the switch. A locking arm is positioned proximal the switch. A... | 04/01/2003 |
| 6459053 | Overtoggled interrupter switch assembly A group operated overhead switch for high voltage power lines includes a rotatable overtoggle mechanism linked to a control shaft and a plurality of switch phases secured to a crossarm support. The overtoggle mechanism can be rotated to and from a closed ... | 10/01/2002 |
| 6195253 | Substation A substation for high voltage switching and a method of building the same. The substation includes an air-insulated high voltage switchgear station, a transformer and a medium voltage switchgear station. The high voltage switchgear station is arranged ins... | 02/27/2001 |
| 5874900 | Monitoring system and method for an overhead power line phase switch In an overhead power line switch, critical switch adjustment dimensions, switch position, switch status and other switch parameters are sensed by a plurality of particularly placed sensors, allowing determination as to whether the switch has operated corr... | 02/23/1999 |
| 5821486 | Switch for hookstick operation A gang-operated multi-pole switch is provided including an operating handle suitable for manual operation via a hookstick and including an open-position retention arrangement. The open-position retention arrangement includes a first member movable with th... | 10/13/1998 |
| 5769208 | Lockable assembly for engaging and disengaging a motor operator with an overhead distribution gang switch An apparatus used in combination with a motor operator and an overhead distribution gang switch. The motor operator is activatable for automatically opening and closing the gang switch. The locking assembly includes a coupler assembly that couples the mot... | 06/23/1998 |
| 5584379 | Disconnect switch double motion mechanism A double-sided break switch is provided which is operated by a double motion mechanism that rotates the blade about its own axis.... | 12/17/1996 |
| 5560474 | Electro/mechanical actuator for circuit disconnect/connect apparatus for overhead power lines The apparatus includes contact blades at different elevations on a utility pole rotatable between electrical connection and disconnection positions vis-a-vis contact members. To rotate the contact blades, an electromechanical linear actuator extends a cle... | 10/01/1996 |
| 5313106 | Circuit-parameter sensing device A multi-pole group-operated switch configuration is provided for electrical distribution circuits. The switch configuration includes integral arrangements for sensing circuit parameters and supplying power for a switch operator of the switch configuration... | 05/17/1994 |
| 5268543 | Locking arrangement for disconnect switch An arrangement for locking the disconnect linkage of a high-voltage switch is provided that includes two relatively movable locking members that are each moved between locked and unlocked positions in response to operation of the disconnect linkage. As th... | 12/07/1993 |
| 5228559 | Section switch that opens suddenly A section switch has a pivoting blade connected to a first connector. The blade is provided with a contact hammer for engaging contact jaws connected to a second connector. The section switch includes a first contact finger fixed to a first spring and ele... | 07/20/1993 |
| 5198630 | Resistance insertion type circuit-breaker A high-voltage circuit-breaker comprises a first insulative support column carrying a first current terminal and a pivoting cut-off arm provided with a first contact. An insulative column rotates to maneuver the cut-off arm. A second insulative support co... | 03/30/1993 |
| 5103111 | Switch configuration with integral sensing and power supply apparatus A multi-pole group-operated switch configuration is provided for electrical distribution circuits. The switch configuration includes integral arrangements for sensing circuit parameters and supplying power for a switch operator of the switch configuration... | 04/07/1992 |
| 4677262 | Operator for interrupters and disconnect mechanisms An operator is provided that includes a common drive for charging an operating mechanism and for driving a functional accessory device in predetermined coordinated relationship. The common drive in a specific embodiment is provided as a drive shaft at the... | 06/30/1987 |
| 4622250 | Insulating material and use thereof in insulators An improved insulating material is provided. The insulating material is a mixture of an insulating fluid and solid insulative bodies. The insulating material exhibits desirable insulating, conformal coating, surface adhesion, and low-viscosity characteris... | 11/11/1986 |
| 4379956 | Break-jaw construction for a disconnecting switch structure An improved switch-jaw construction is provided for a disconnecting switch having a tie-rod assembly interconnecting the free ends of the confronting switch jaw contacts. The tie-rod assembly includes preferably a metallic tubular member having its outer ... | 04/12/1983 |
| 4367381 | Switch for high voltages A switch for high voltages comprising co-operating fixed and movable spherical contacts, of which the or each fixed contact consists of a stationary body in the shape of a hollow spherical cap and a potential field controlling screen adapted to be forced ... | 01/04/1983 |
| 4357504 | Bearing and journal means for the rotatable crank-arm assembly of a disconnecting switch An improved bearing and journal construction is provided for a high-voltage disconnecting switch of the type having supporting insulators and a rotatable crank-arm arrangement, with the operating thrust of the crank-arm being supported by simplified beari... | 11/02/1982 |
| 4357503 | Blade-adjustment device for a disconnecting-switch structure An improved simple adjustment device is provided for each of several disconnecting switch structures enabling an independent positioning of the blade-assemblies in the open and closed positions, by an adjustment of a tongue-member, which is incorporated i... | 11/02/1982 |
| 4339636 | Disconnecting switch having improved switch-blade hinging structure An improved disconnecting switch is provided having an improved hinging structure which provides the traditional movements of a vertical break disconnect switch-blade in a simple and unique way. The switch-blade rotates about its longitudinal axis on a bl... | 07/13/1982 |
| 4320311 | Combination isolating switch and current transformer An isolating switch for use in a voltage cell connected to a source of power. The switch is disposed on a slidable frame mounted on guides internally of the cell. It includes a movable assembly mounted rotatably on the slidable frame, with capacity for pi... | 03/16/1982 |
| 4243854 | Quick-break attachment for a pole-top air-break switch Improvements in a quick-break attachment, for a pole-top air-break switch, wherein said attachment is of the type including a whip engaged in a catch to maintain a protective, anti-arcing shunt across the switch until the latter opens, whereupon the whip ... | 01/06/1981 |
| 4123639 | Support assembly for a circuit interrupting device An improved support assembly for a circuit-interrupting device is disclosed. The device is of a type having first and second end fittings which define a major axis and which are selectively engageable and disengageable from matching first and second mount... | 10/31/1978 |
| 4103122 | High voltage grounding switch requiring low operating effort A high voltage grounding switch adapted to ground high voltage power lines or other electrical equipment is provided with a two-part blade having toggle type action, with the toggle joint placed near the hinge pivot. The blade is then rotated from a fully... | 07/25/1978 |
| 4103121 | Switch operating mechanism Main contact and interrupter contact operating rods of opposed current interrupters are sequentially moved by a spring loaded operating mechanism to open the main contacts and interrupting contacts of the interrupter switches. Rotation of an input shaft t... | 07/25/1978 |
| 4103120 | Auxiliary mechanism for imparting rotational energy to electrical components Disclosed is an auxiliary mechanism for rapidly imparting rotational energy to electrical switch components. An insulator connects an electrical switch component to an output shaft mounted for rotation in the mechanism housing. A lever arm assembly is mou... | 07/25/1978 |
| 4078162 | Blade lock for electric switch The invention provides an improved positive latch for high voltage, air break disconnect switches of the type having an elongated blade with one end swiveling on a terminal to switch its opposite end from the remote terminal, the blade being rotatable abo... | 03/07/1978 |
| 4072999 | Outdoor high-voltage switchgear assembly An outdoor high-voltage switchgear assembly comprising rigid sectionalized busbars provided with busbar compensators made of flexible current-conducting members mounted on insulated supports through the use of bases having an open configuration and electr... | 02/07/1978 |
| 4006325 | Offset pivot ground switch An interphase support shaft is offset with respect to the rotation point to permit the shaft weight to serve as a counterbalance to the switch blade by locating its weight at a distance from the pivot point.... | 02/01/1977 |
| 4001530 | Ice breaking device for disconnect switch contact assemblies The disconnect switch blade, prior to the engagement of the blade plug with the switch contact shoes, engages with a curved upper portion of an ice breaker lever to effect its pivotal movement and thereby move a plurality of associated ice breaker bars fr... | 01/04/1977 |
| 3982083 | Contact system for an outdoor electrical switch Providing the contact spacer of a high voltage outdoor switch with a reduced number of inboard contacts to reduce the friction experienced in opening and closing the switch without reducing the switch rating.... | 09/21/1976 |
