I have a 1908 sprinkler with a rotating deflector. Hard to read the manufacturer, but looks like MASCO Model C. The old IRI Early Automatic Sprinkler Heads pamphlet shows an 1888 Gleason with one.
Ed Vining 4819 John Muir Rd Martinez CA 94553 925-228-8792 Cell 925-787-0465 On Wed, Apr 25, 2012 at 7:50 AM, Todd Williams <[email protected]> wrote: > I won't go into my idea of a spinning deflector to improve water > distribution (this may have already been done; i'm not sure) > > > At 10:18 AM 4/25/2012, you wrote: > >Thanks Todd. > > > >I was really thinking along these lines. When calc'ing coverage, density > >and such...we measure linearly right?. And thus, we measure squares of > >coverage. However, the sprinkler generally throws in a circular pattern. > >What percentage of a circle lies outside the box once it is drawn inside > of > >a circle? I flunked out of Bus. Calc... Might point being, we are proving > >and being rejected for a few pounds here;gpms there; by what is proven in > >the box. Not many bucket tests going on. Do we conservatively give away > >this advantage because squares are easier to deal with mathematically? > >Also, aren't most sprinklers conservatively rated. I have seen a standard > >head throw well beyond 7'6" or 9'-0" for that matter. Oh, and this just > in, > >{they never stop these days...} As the water stream hits the deflector and > >is deflected outwards, wouldn't a circular shadow be formed directly under > >each head? This would also subtract another percentile from what is > >actually "in the box" I guess that would be a negative though. > > > >This is all rhetorical and is just an exercise in learning and creative > >thinking. > > Teach your kids to read. Teach your kids to question everything they > read. > >Teach them to question everything... George Carlin. > > > >On Tue, Apr 24, 2012 at 1:50 PM, Bruce Verhei <[email protected]> > wrote: > > > >> I've read in the past that this fell in the not well understood effect > >> category when engineers have desired to model how sprinklers actually > work. > >> This seems to be difficult. They say something that ends with but > >> sprinklers installed and maintained to standards have a remarkable > record > >> of controlling fires in buildings. > >> > >> I want to buy one of the square heads. Are the threads square too? > >> > >> Bruce > >> > >> Sent from my Motorola ATRIX™ 4G on AT&T > >> > >> -----Original message----- > >> From: Thomas Watt <[email protected]> > >> To: [email protected] > >> Sent: Tue, Apr 24, 2012 13:05:01 GMT+00:00 > >> Subject: Rounding off {Squaring off?} > >> > >> I had a brain-fart and came up with this question for the forum. > Especially > >> the engineers. Since sprinklers, in general, throw in a circular > pattern, > >> and we calc the sprinklers as squares, there is always overlap so we > are by > >> default miscalculating a percentage of the density. Has anyone ever > >> calculated the safety factor effect by ignoring the arcs outside the > >> square??? > >> > >> Thomas > >> A+ fitter/Foreman > >> No work in Orlando, FL area > >> Willing to relocate > >> -------------- next part -------------- > >> An HTML attachment was scrubbed... > >> URL: < > >> > http://fireball.firesprinkler.org/mailman/private/sprinklerforum/attachments/20120424/5639c5b1/attachment.html > >> > > >> _______________________________________________ > >> Sprinklerforum mailing list > >> [email protected] > >> http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum > >> -------------- next part -------------- > >> An HTML attachment was scrubbed... > >> URL: < > >> > http://fireball.firesprinkler.org/mailman/private/sprinklerforum/attachments/20120424/50c0be9e/attachment.html > >> > > >> _______________________________________________ > >> Sprinklerforum mailing list > >> [email protected] > >> http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum > >> > >-------------- next part -------------- > >An HTML attachment was scrubbed... > >URL: < > http://fireball.firesprinkler.org/mailman/private/sprinklerforum/attachments/20120425/ce2f2be7/attachment.html > > > >_______________________________________________ > >Sprinklerforum mailing list > >[email protected] > >http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum > > Todd G. Williams, PE > Fire Protection Design/Consulting > Stonington, CT > 860.535.2080 > www.fpdc.com > > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://fireball.firesprinkler.org/mailman/private/sprinklerforum/attachments/20120425/5f3012ca/attachment.html> _______________________________________________ Sprinklerforum mailing list [email protected] http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum
