CHARLES WILBERT KELLY
Engineering in Pittsburgh, PA

3932696, Jan 13, 1976

Dec 26, 1973

5/427507

Frank W. Fork - Allison Park PA
Robert G. Lindner - Sewickley PA
Charles J. Kelly - Pittsburgh PA
Raymond E. Albrecht - Sewickley PA

H. H. Robertson Company - Pittsburgh PA

H02G 328

174 48

An underfloor access housing adapted for use with cellular flooring units of the type normally placed in building floors, and which provide plural cells separated by troughs. The access housing presents a dual outlet opening in its top wall, spans across a trough, and is secured to the crests of adjacent cells. Trough closures positioned on opposite sides of the access housing, enclose a trough space accessible through the dual outlet opening. Cell access openings provided in the webs of the flooring unit establish communication between the cells and the trough space. A partition divides the interiors of the housing and of the trough space into separate compartments, each including one of the cell access openings and one including the dual outlet opening. The partition is adapted to support at least one electrical plug receptacle whereby electrical connections may be made beneath the level of the finished floor. Fireproofing material provided as an unobtrusive layer or layers serve to increase the fire resistance of the access housing.

4232493, Nov 11, 1980

Apr 28, 1978

5/901063

Charles R. Gray - Coraopolis PA
John O. Hazen - Monaca PA
Charles J. Kelly - Pittsburgh PA

H. H. Robertson Company - Pittsburgh PA

E04C 310

52221

A floor structure comprising a metal subfloor including metal cellular units providing plural enclosed cells; housings associated with certain of the cells, each adapted to provide future access to different electrical services at one location in the floor structure; a covering layer of monolithic concrete covering the subfloor and the housing, and a layer of fireproofing material covering the lower face of the metal subfloor. Activating means is provided establishing access to the enclosed cells through the housing without significantly reducing the desired fire endurance of the floor structure and without increasing the thickness of the layer of fireproofing material. The fireproofing material has a thickness which is less than that required to provide the floor structure with a desired fire endurance when the housing is activated. A method is disclosed for establishing acess to the enclosed cells through the insert while maintaining the fire endurance capability of the floor structure.

4323723, Apr 6, 1982

Apr 4, 1980

6/137545

Frank W. Fork - Allison Park PA
Charles J. Kelly - Pittsburgh PA

H. H. Robertson Company - Pittsburgh PA

H02G 310

174 48

A dual service outlet unit provides above-the-surface accessibility to power and to telephone and signal services. The unit includes cover and base members comprising segments of separate metal extrusions. When interfitted, the cover and base members provide separate compartments, one for power wiring and the other for telephone/signal wiring.