JAMES R ANDERSON
Engineers in Berwyn, PA

4007878, Feb 15, 1977

Aug 19, 1976

5/716065

James R. Anderson - Berwyn PA

Central Sprinkler Corporation - Lansdale PA

B05B 1508, A62C 3710, F16L 1502

239209

An adjustable drop nipple is disclosed for installing fire protection sprinkler systems which comprise sprinkler head assemblies of the dry, pendant type. The downwardly extending length of a drop nipple having a sprinkler head thereon is adjusted by sliding the nipple axially in a collet having an externally tapered section that engages an internally tapered section of a stationary collet holder. When a selected drop length has been established, the collet is then compressed axially against the collet holder with tightening means whereby the nipple is firmly gripped by the collet so that axial sliding thereof is prevented, thereby maintaining the nipple at the selected drop length.

4117887, Oct 3, 1978

Apr 13, 1977

5/787001

James R. Anderson - Berwyn PA

Central Sprinkler Corporation - Landsdale PA

A62C 3712

169 37

A fire protection sprinkler head arrangement comprises a flange attached to a bracket on the sprinkler body by boss and shoulder joints, e. g. , bayonet joints. The flange serves as a brace preventing sagging of ceiling tile and unwanted retraction of the sprinkler head rearwardly with respect to the ceiling or a sidewall. One embodiment of the flange is adjustable axially relative to the sprinkler body by an upwardly directed series of shoulder joints into which the boss is selectively fitted to conform to a particular ceiling or wall structure and feeder pipe system.

4066129, Jan 3, 1978

Sep 17, 1976

5/724736

James R. Anderson - Berwyn PA

Central Sprinkler Corporation - Lansdale PA

A62C 3710, F16L 3724

169 37

A sprinkler is disclosed which comprises a flange attached to a bracket on the sprinkler body by means of boss and shoulder joints, e. g. bayonet joints. The flange can serve as a bracing means which prevents sagging of ceiling tile or unwanted retraction of the sprinkler head rearward of an opening in a sidewall. When used with recessed sprinklers, a cover plate can be attached to the flange with a bonding material having a low softening point. By means of the boss and shoulder joints, the flange and the attached cover plate can be easily mounted on the sprinkler as a subassembly, and can be just as easily removed therefrom for inspection and/or servicing of the sprinkler.

4014388, Mar 29, 1977

Jun 21, 1976

5/698479

James R. Anderson - Berwyn PA

Central Sprinkler Corporation - Lansdale PA

A62C 3712, A62C 3730

169 37

A concealed, flush mounted sprinkler is disclosed which comprises a slidable deflector which, in the event of fire, is extended to an operating position by means of a compressed spring. The nozzle, a thermally responsive element, and the deflector of the sprinkler reside within a receptacle having an outer cover against which the deflector is continuously pressured by means of the spring. The cover is attached to the receptacle by means of a fusible eutectic alloy, and as the alloy begins to soften and become elastic during a fire, the compressed spring aids detachment of the cover from the receptacle while simultaneously sliding the deflector to an operating position beyond the ceiling or sidewall in which the sprinkler is mounted.

4083410, Apr 11, 1978

Aug 19, 1976

5/716066

James R. Anderson - Berwyn PA

Central Sprinkler Corporation - Lansdale PA

A62C 3910

169 37

An adjustable drop nipple for sprinkler heads is disclosed which comprises a stationarily mounted collar with internal threads that receives an externally threaded nipple, and whereupon rotating the nipple a portion of its length is caused to retract into the collar or extend from it, depending on the direction of rotation, in order to precisely regulate vertical elevation of a sprinkler head attached to the lower end of the nipple. An effective seal against leakage of water is achieved by use of one or more O-rings on the nipple which abut a smooth bore section inside the collar.