I have a 1908 sprinkler with a rotating deflector. Can't read its name, but looks like MASCO Model C.
The old IRI collection pamphlet shows also a 1888 Gleason which has 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/20120425/6a504f5b/attachment.html> _______________________________________________ Sprinklerforum mailing list [email protected] http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum
