Actor Zeppo Marx patented a "Cardiac Pulse Rate Monitor" in 1969.
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| Number | Title | Issue Date |
| 7440260 | Electrical bus member mounting system and electrical enclosure employing the same An electrical bus member mounting system is provided for an electrical enclosure including a housing having a front, a back and a plurality of sides, a plurality of sections disposed between the sides, at least one electrical apparatus disposed within a first one of... | 10/21/2008 |
| 7417847 | Compact current transformer casing for gas-insulated switchgear assemblies The invention pertains to a current transformer (1′) for enclosed, gas-insulated high-voltage switchgear (10). According to the invention, a current transformer (1′) is characterized in that a removable installation flange (12, 12′)... | 08/26/2008 |
| 7352564 | Power distribution substation An improved power distribution unit substation, having a plurality of differing voltage rated main breaker cells, encased within a single housing is disclosed. The improved power distribution substation saves considerable floor space as compared to prior art substat... | 04/01/2008 |
| 7342474 | Circuit breaker configured to be remotely operated A circuit breaker configured to be remotely operated is disclosed. The circuit breaker includes a set of main contacts configured to connect between an electrical source and an electrical load, an operating mechanism in operable communication to open and close the m... | 03/11/2008 |
| 7286337 | Switching device for power distribution An object of the present invention is to provide a switching device for power distribution, wherein the entire load side-area including a circuit breaker can be protected against the grounding, whereby the protection region can be widened, leading to an enhancement ... | 10/23/2007 |
| 7142410 | Transformer with housing and switch gear A transformer is formed by a housing having a main transformer compartment, a first compartment for the input terminals for the main power supply, a second compartment for the output terminals to supply the load and a third compartment for a manually operable switch... | 11/28/2006 |
| 7061349 | Circuit breaker configured to be remotely operated A circuit breaker configured to be remotely operated is disclosed. The circuit breaker includes a set of main contacts configured to connect between an electrical source and an electrical load, an operating mechanism in operable communication to open and close the m... | 06/13/2006 |
| 6631075 | Switchgear The instrumentation transformers 6a to 6d and 7a to 7f for measuring the voltage of the main circuit are arranged within the container 15b located in the midst of the containers 15a to 15c. In the present invention, the containers 15a and 15b are linked b... | 10/07/2003 |
| 6459569 | Switchgear The instrumentation transformers 6a to 6d and 7a to 7f for measuring the voltage of the main circuit are arranged within the container 15b located in the midst of the containers 15a to 15c. In the present invention, the containers 15a and 15b are linked b... | 10/01/2002 |
| 6229690 | Electrical switchgear The invention concerns a horizontally divided switchgear, including compartments for high voltage and for cable connection. The cable connection compartment is common to one or more switchgear cubicles and is a compartment separated from the high voltage ... | 05/08/2001 |
| 6219225 | Gas insulated switch gear and method for assembling therefor A gas insulated switch gear has a main bus unit, a circuit breaker unit and a line unit. The line unit has a top plate with a hole through which a potential transformer is inserted into the inside of the line unit and an adapter cover fixed to the potenti... | 04/17/2001 |
| 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 |
| 5587873 | Distributor In a distributor, a plurality of switches are connected in series with one another on main distribution lines emerging from a receiver switching apparatus, thus forming a trunk. A branch line extends from a junction between each pair of adjoining switches... | 12/24/1996 |
| 5539614 | Control unit, plug-in unit, transformer, zero-phase current transformer, and frequency measuring circuit applied to control center A control unit forms a control center serving as one type of a control panel in an electric power system control system. The control unit accommodates equipments such as a circuit breaker, an electromagnetic switch, a zero-phase current transformer, and a... | 07/23/1996 |
| 5483417 | Power board In a power board, network transformers are disposed horizontally to reduce their height, network buses are disposed above the network transformers and a protector breaker and take-off breakers are disposed at the front of the power board in electric chamb... | 01/09/1996 |
| 5450280 | Voltage transformer disconnect grounding system A device grounding system is shown which ensures that upon disconnect, an operator will be able to visually determine that a ground has been applied to the disconnected device. The grounding system is designed to mechanically drive a linkage which is cont... | 09/12/1995 |
| 5367432 | Instrument current transformer for power cables An instrument current transformer for a main power cable which is composed of three power cables for three phases disposed in a power cable laying hole and three current transformer coils for the three phases, each of the three current transformer coils s... | 11/22/1994 |
| 5280408 | Power receiving and transforming apparatus A transformer apparatus whose transformer and a plurality of circuit-breakers are individually accommodated in a plurality of different casings. The casings are stacked one above each other in a plurality of stages with gaps between two subsequent casings... | 01/18/1994 |
| 5216575 | Power board In a power board, network transformers are disposed horizontally to reduce their height, network buses are disposed above the network transformers and a protector breaker and take-off breakers are disposed at the front of the power board in electric chamb... | 06/01/1993 |
| 5210679 | Customer's power receiving and transforming system A power receiving and transforming system comprising a gas insulated switchgear, with transformers being disposed adjacent the gas insulated switchgear and metal enclosed switchgear sections disposed on opposite sides of the transformers with respect to t... | 05/11/1993 |
| 4500935 | Package substation in tank with separate chambers The invention deals with a package substation in which a plurality of elements which constitute a substation are accommodated in a tank, the elements are isolated by separator walls which constitute accommodation chambers, and said accommodation chambers ... | 02/19/1985 |
| 4343030 | Load break switch A compact load break switch having at least one vacuum interrupter connected between two terminals carried by respective insulating bushings through a current exchange assembly. The vacuum interrupter is disposed within one of the insulating bushings, and... | 08/03/1982 |
| 4197571 | End section for connecting a generator takeoff to a block transformer A single phase, metal encapsulated generator takeoff for generators of large power rating, which permits equalization of position tolerances in the vertical and horizontal direction when making the connection to a block transformer without effort in which... | 04/08/1980 |
| 4172271 | Fusible circuit interrupter with ground fault circuit protection A circuit interrupter is secured to a mounting pan together with an insulative block in turn mounting a transverse array of fuse load terminals in individual, spaced alignment with associated interrupter load terminals. A differential current transformer ... | 10/23/1979 |
| 4118755 | Self-cooled metal-clad switchgear Metal-clad switchgear utilizing means to provide for self-cooling of the current transformers and primary disconnecting contacts. The support enclosure for the current transformers and the disconnecting contacts is apertured beneath the location of the cu... | 10/03/1978 |