Roy J Swanson

US Patent:

6486426, Nov 26, 2002

Filed:

Mar 16, 2001

Appl. No.:

09/808874

Inventors:

Roy T. Swanson - La Grange IL

Assignee:

SC Electric Co. - Chicago IL

International Classification:

H01H 106

US Classification:

200275, 200256

Abstract:

A contact arrangement is provided, e. g. of the type that functions as a wiping contact for a moving contact such as a pivotally mounted switch blade in an electrical power distribution switch. The contact arrangement in an illustrative embodiment includes spaced apart contact members that are biased toward each other to define predetermined contact pressure/force characteristics with respect to the interposed moving contact. The contact members in a preferred embodiment include predetermined contact areas and predetermined structural features to minimize deformation due to magnetic forces experienced in the presence of high currents. The structural features are also arranged to define current paths that increase the contact pressure. In a particular embodiment the contact areas are formed on the contact members so as to minimize the size of the moving contact.

US Patent:

6538422, Mar 25, 2003

Filed:

Apr 12, 2001

Appl. No.:

09/833537

Inventors:

David E. Potter - Chicago IL
Timothy J. Mulligan - Glenview IL
James A. Rutkowski - Chicago IL
Roy T. Swanson - La Grange Park IL
Daniel M. Terhune - Chicago IL

Assignee:

S C Electric Co. - Chicago IL

International Classification:

G01R 1914

US Classification:

324133, 324126

Abstract:

A voltage sensing apparatus includes an output for a voltage tap point that is useful in representing the voltage on a conductor that passes through the voltage sensing apparatus. The voltage sensing apparatus also performs the function of a separable insulated conductor, e. g. a conventional bushing or bushing insert as utilized in the electrical power distribution field. The voltage sensing apparatus includes a molded body having an embedded capacitance screen that provides the output. The body is molded about the capacitance screen. An arrangement is provided for locating the capacitance screen within the molded body. In a preferred embodiment, the capacitance screen is molded from a conductive plastic preferably formed with an open mesh or screen structure that permits the free flow of molding material.

US Patent:

46925775, Sep 8, 1987

Filed:

Oct 25, 1985

Appl. No.:

6/791178

Inventors:

Roy T. Swanson - North Riverside IL

Assignee:

S&C Electric Company - Chicago IL

International Classification:

H01H 3306

US Classification:

200151

Abstract:

An energy-absorbing element is provided between an insulative piston and a movable contact of a switch for a high-voltage device. In arrangements where a fusible element is in electrical shunt with the switch, the energy-absorbing element improves the rapid commutation of the current from the switch to the fusible element where final circuit interruption takes place. The switch is of the general type in which ignition of a power cartridge moves the insulative piston, which is normally located in a bore formed in a conductive member, away therefrom and into a passageway formed in an insulative liner. The movement of the piston moves the movable contact through the passageway and away from the conductive member to break an electrical interconnection between the conductive member and the movable contact. This forms a gap between the conductive member and the movable contact and opens the switch. The ignition of the power cartridge evolves high pressure within a chamber defined by the piston and the bore.

US Patent:

44220626, Dec 20, 1983

Filed:

Oct 6, 1982

Appl. No.:

6/433077

Inventors:

Bruce A. Biller - Chicago IL
Henry W. Scherer - Mt. Prospect IL
Roy Swanson - North Riverside IL

Assignee:

S&C Electric Company - Chicago IL

International Classification:

H01H 7110

US Classification:

337171

Abstract:

A pull-ring for an electrical device, such as a high-voltage fuse, which may be placed in a mounting. The pull-ring operates a latch, which is capable of holding the fuse closed in the mounting, only when it is reciprocated. The pull-ring is pivotable independently of its reciprocation without affecting the condition of the latch. Accordingly, when a trunnion on the device is in a hinge of the mounting and a pushing force is applied to the pull-ring with a tool to close the device, the natural decrease in the interior angle between the tool and the device can rotate the pull-ring without preventing the latch from holding the device closed. Further, whether the pushing force or a pulling (opening) force is applied to the pull-ring, the direction of application of the force may be adjusted or may naturally change before, during,or after such force application with affecting the ability of the latch to hold the device closed. The tool may, therefore, be either a non-grasping tool (a "hot stick") or one (a "shotgun stick") capable of grasping the pull-ring. In the latter event, when the tool grasps the pull-ring and the trunnion is out of the hinge, the pull-ring is biased to a pivotal orientation whereat the trunnion is presented for convenient insertion into the hinge upon manipulation of the tool.

US Patent:

41699734, Oct 2, 1979

Filed:

Oct 30, 1978

Appl. No.:

5/956463

Inventors:

Joel A. Ramos - Chicago IL
Roy T. Swanson - North Riverside IL

Assignee:

S & C Electric Company - Chicago IL

International Classification:

H01H 150
H01H 360

US Classification:

200256

Abstract:

A bounce- and weld- resistant contact assembly includes a pair of spaced contact plates with facing contacts on their ends. A switch blade is rapidly movable into and out of engagement with the contacts. The contacts are convexities coined into the plates which add no mass to the plates. Thus, the natural frequency of the plates is maximized and the magnitude of oscillation of the plates, when the contacts are rapidly engaged by the blade, is minimized. Legs on leaf springs act against concavities formed in the plates opposite the convexities. The legs conformally nestle in the convexities so that their frictional engagement therewith and the spring force co-act to quickly damp the high frequency, low magnitude oscillations of the plates. The low mass coined contacts also permit close spacing of the plates to maximize magnetic forces thereon due to current flow therethrough. These forces aid the spring and the leg-concavity friction in quickly damping oscillations of the plates.

US Patent:

43440592, Aug 10, 1982

Filed:

Nov 11, 1976

Appl. No.:

5/741027

Inventors:

Roy T. Swanson - North Riverside IL

Assignee:

S&C Electric Company - Chicago IL

International Classification:

H01H 7120

US Classification:

337174

Abstract:

Disclosed is an arcing rod catcher for a high voltage fuse which engages the arcing rod when the arcing rod moves during fuse operation so that the arcing rod will not bounce back or reverse directions during and after fuse operation. Since the arcing rod movement is utilized to actuate a fuse latch assembly to release the fuse from an upper mounting when it operates, it is necessary for the arcing rod to move to the operating position and remain in that position to permanently indicate that the fuse has operated and to prevent the possibility that a blown fuse will be re-latched into a closed position. The disclosed invention utilizes engaging fingers which allow the arcing rod to pass in one direction but prevent the arcing rod from returning in the opposite direction when the fuse operates.

US Patent:

56753080, Oct 7, 1997

Filed:

Mar 20, 1996

Appl. No.:

8/618592

Inventors:

Henry W. Scherer - Gurnee IL
Bruce A. Biller - Chicago IL
Hiram S. Jackson - Morton Grove IL
Roy T. Swanson - La Grange Park IL
David W. Zabel - Evanston IL

Assignee:

S&C Electric Company - Chicago IL

International Classification:

H01H 8502
H01H 8520

US Classification:

337186

Abstract:

A low-exhaust composite drop-out assembly is provided that is utilizable in a standard cutout mounting in electrical power distribution systems. The composite drop-out assembly includes current-limiting and low-current clearing sections and is easily removable from mounting for servicing. The sections are efficiently arranged in a side by side configuration. The low-current clearing section includes a fuse-robe assembly having a replaceable fuse cartridge. Accordingly, the low-current clearing section is simply and economically renewable for reuse whether or not the current-limiting section has operated. Further, the current-limiting section need not be replaced if only the low-current clearing section operated in response to overcurrent in a low range. Additionally, the sections are separable so that the low-current clearing section can be reused after simple refusing even when the current-limiting section has operated.

US Patent:

54381614, Aug 1, 1995

Filed:

Jun 4, 1993

Appl. No.:

8/072628

Inventors:

Glenn R. Borchardt - Franklin Park IL
Roy T. Swanson - La Grange Park IL
James W. Barker - Niles IL

Assignee:

S&C Electric Company - Chicago IL

International Classification:

H01L 2328
H01B 500
H01B 508
B29C 3700

US Classification:

174 522

Abstract:

An electrical path or interconnection arrangement is provided within a formed support body of polymeric material that exhibits volumetric changes during and after the forming thereof. The electrical path or interconnection arrangement provides an accurately positioned electrically conductive path through the material of the support body and also responds to, accommodates and alleviates the effects of forces at the interface between the material of the support body and the electrical path or interconnection arrangement that occur during and after the forming of the support body. The interconnection arrangement exhibits predetermined deformability/compressibility characteristics to alleviate stresses caused by the volumetric changes of the polymeric material. In a preferred arrangement, the interconnection arrangement includes an elongated tubular conductor fabricated from a metallic material. The material, the thickness of the tubular walls of the conductor, and the dimensions of the cross-section of the conductor are selected in accordance with the dimensions of the electrical path and the characteristics of the polymeric material to provide predetermined deformability/compressibility characteristics so as to avoid undesirable stress at the interface of the conductor and the polymeric material.