General Electric Company

Frederick E Cox

Kevork A Torossian

Mark Markovitz

Ralph T Heisler

Frederick J Rink, Jr

Richard A Valachovic

Series loops of the stator of a large steam turbine-generator are electrically insulated from each other by enclosing each of them in its own clamshell thermoplastic resin mold and filling the mold with an electrically-insulating thermosetting resin material which bonds to the metal of the series loops and the stator bars and bonds also to the ground insulation covering on the stator bars and to the mold and together with the mold provides in cured form an integral body which is resistant to vibrational and impact forces and to distortional forces incident to thermal cycling of the equipement in normal use.

Conductor insulating method

A control device, such as a U-shaped member including opposingly directed tab projections connected to the upstanding arms of the member may be coupled to a space block of a dynamoelectric machine for limiting motion, especially inward radial motion, of the block. In one embodiment, the space block has a groove for forming a portion of a keyway between the space block and a flange and the tabs of the member are disposed in the keyway radially outward a key which is dimensionally smaller than the groove, so that the tabs abut a sidewall of the groove, thereby limiting motion of the block when the key contacts the tabs.

Space block control means for dynamoelectric machine

A thermosetting resin composition of an epoxy resin mixture of 1,2 epoxy resin having at least two epoxide groups per molecule and a polyglycol diepoxide having viscosity of 2,000-5,000 centipoises at 25.degree. C. and in addition small but effective amounts of both a catalytic hardener and an accelerator has special utility in the production of composite molded bodies of electrical insulation having thermoplastic shells because of its unique combination of properties including thermal stability, thermal-cycling crack resistance, high impact strength, toughness, room-temperature curability and bondability to both thermoplastic and metallic surfaces, and because it does not stress crack thermoplastic shells to which it is bonded in curing.

Unique epoxy resin compositions and composite molded bodies filled

Series loops of the stator of a large steam turbine-generator are electrically insulated from each other by enclosing each of them in its own clamshell thermoplastic resin mold and filling the mold with an electrically-insulating thermosetting resin material which bonds to the metal of the series loops and the stator bars and bonds also to the ground insulation covering on the stator bars and to the mold and together with the mold provides in cured form an integral body which is resistant to vibrational and impact forces and to distortional forces incident to thermal cycling of the equipment in normal use.

Growing community of inventors

Gloversville, NY, United States of America

Frederick E Cox