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Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Inventor:
Platt; William J.
Address:
Collingdale, PA
No. of patents:
10
Patents:












Patent Number Title Of Patent Date Issued
RE33501 Fire-rated beam with expansion relief section December 25, 1990
A beam for a fire-rated suspended ceiling structure wherein the beam has an inverted-T construction and includes a central web having a bulb at the top and a pair of oppositely disposed flanges at the bottom for supporting ceiling tiles, and an improved expansion relief section of the be
4926607 Compression leg May 22, 1990
A compression leg that is applied to the hanger wire of a suspended grid ceiling. The leg is formed with a cross section having a portion intended to envelop the wire, and a channel portion that guides the leg into place about the wire. The leg is of rigid metal, and is crimped to the wi
4916877 Fire strip construction April 17, 1990
A fire strip for a suspended grid ceiling has an inner spring steel web having a slightly arcuate cross section, and an outer web of soft steel wrapped around the inner web. A finished strip is formed by bending the strip normal to the strip body at both ends. When the ends are bent, a
4890428 Partition clip January 2, 1990
A clip for securing the top channel of a partition wall to a beam of a continuously extending suspended grid ceiling. The clip has a flat base and diagonally positioned hooks on the base. The clip is applied to the beam by rotating the hooks onto the beam flanges where the clip is locked
4827681 Interlocking cross tee May 9, 1989
A fire-resistant suspended ceiling grid structure having cross tees and main beams, to support ceiling tiles. The structure has shear means to permit a cross tee to expand into a main beam during a fire. The shear means have a notch behind a transverse tab formed in the cross tee which
4794745 Tier drop grid system January 3, 1989
A suspended ceiling grid member which comprises a web portion, an upper bulb extending along the top of the web portion, a pair of flanges extending outwardly from the bottom of the web portion, the flanges being adapted to support ceiling tiles, and a lower bulb extending downwardly
4785603 Interlocking cross tee November 22, 1988
In a suspended ceiling grid structure adapted to support ceiling tiles or the like, connecting apparatus between ceiling grid inverted T main and cross members disposed at right angles to each other and having upright central fins and bottom horizontal flanges comprise a tongue extending
4727703 Suspended ceiling grid structure March 1, 1988
In a suspended ceiling grid structure adapted to support ceiling tiles or the like, connecting apparatus between ceiling grid inverted T main and cross members disposed at right angles to each other and having upright central fins and bottom horizontal flanges comprise a vertically dispo
4713919 Laser welded ceiling grid members December 22, 1987
A method of making an inverted T shaped ceiling grid member comprises the steps of folding a sheet of metal to form a vertical central web with a bulb at the top and having two web sidewalls with a pair of oppositely disposed horizontal flanges extending outwardly from the bottom of the
4606166 Fire-rated beam with expansion relief section August 19, 1986
A beam for a fire-rated suspended ceiling structure wherien the beam has an inverted-T construction and includes a central web having a bulb at the top and a pair of oppositely disposed flanges at the bottom for supporting ceiling tiles, and an improved expansion relief section of the be










 
 
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