Mark,
On April 4, 1932, Mr Emil Tyden of Hastings, MI applied for a patent of a dry
type pendent sprinkler. The dry barrel of the sprinkler assembly was attached
to a horizontal portion of the assembly that was threaded into a tee with it's
outlet turned on it's side rather than pointing towards the floor. The
assembly could more accurately be called a 90 degree dry pendent sprinkler. Mr
Tyden was the founder of the Viking Corporation. The patent was granted on
March 28, 1933. Mr Tyden is credited with the invention of the dry sprinkler.
In 1934, Ira Knight applied for and received (1936) a patent for the sidewall
sprinkler.
In 1962, Floyd Lee applied for and received (1964) a patent for a dry adapter
(a dry barrel) for connection of sprinklers to pipe. He demonstrated a
vertical sidewall could be atttached and utilized.....
So would that count as a "Dry Sidewall Sprinkler"??
And for additional historical perspective:
In 1938, Mr Arthur C Rowley of the Globe Automatic Sprinkler Co and Mr Willis
Hodgman filed patent applications for the straight body Dry Pendent Sprinkler.
In 1939, both patents were issued.
The Hodgman model allowed water flow into the barrel when an internal pin or an
internal barrel dropped and a clapper was pushed/fell open. The pin or barrel
was held up by the element of the sprinkler.
The Globe sprinkler had a ball bearing that prevented water flow from entering
the body until the element activated and allowed an internal barrel to drop.
When the inner tube dropped, the ball bearing was released and escaped
completely from the body as water pushed it out.
In 1941, the General Fire Extinguisher Company (which became Grinnell, which
became Tyco) applied for and received (1942) a patent for a dry pendent with a
spring inside that pushed an internal barrel up into the water-filled pipe. A
hole in the side of the internal barrel near the top allowed water in when
pushed up so the hole was in the waterway of the pipe above.
It should be recognized that the above is my opinion as a member of the NFPA
13 Technical Committee, and has not been processed as a formal interpretation
in accordance with the NFPA Regulations Governing Committee Projects and should
therefore not be considered, nor relied upon, as the official position of the
the NFPA, nor any of their technical committees.
Sincerely,
Cecil Bilbo
Academy of Fire Sprinkler Technology
Champaign, IL
217.607.0325
www.sprinkleracademy.com
[email protected]
OUR STUDENTS SAVE LIVES!!
> From: [email protected]
> To: [email protected]
> Subject: RE: Fig. A.8.15.7
> Date: Thu, 10 Apr 2014 22:50:46 +0000
>
> I believe it was added to the standard prior to the advent of the dry
> horizontal sidewall. Poke holes in that! :-)
> Mark at Aero
>
> -----Original Message-----
> From: [email protected]
> [mailto:[email protected]] On Behalf Of Ron
> Greenman
> Sent: Thursday, April 10, 2014 3:21 PM
> To: [email protected]
> Subject: Re: Fig. A.8.15.7
>
> I presume you guys are talking about that picture with the dry pendants
> poking thru the wall to outside at 45 degrees. I've seen many I Seattle and
> even changed out a couple that worked successfully. I just went thru the 1978
> standard page by page, only 207 of the little ones, including the index, and
> it's not in there.
>
> Ron Greenman
> ...On the phone
>
> > On Apr 10, 2014, at 2:52 PM, Roland Huggins <[email protected]>
> > wrote:
> >
> > some great answers. Mine was going to be BECAUSE
> >
> > It seems like once something makes it into a standard, it takes an act of
> > congress to get it out (and sine congress isn’t doing much I guess it’ll
> > never happen). It’s never been questioned (that I can remember) in the 18
> > yrs that I’ve been on the committee. It’s mainly there to show it can be
> > used in other than the normally acceptable manner. We did the same with
> > sidewall sprinklers under the edge of a overhead door. That doesn’t answer
> > the question why not use a dry side wall?
> >
> > I’ve added it to my list of items for the 2019 cycle. So don’t hold your
> > breath for a quick answer unless you can accept ‘cause.
> >
> > Roland
> >
> > Roland Huggins, PE - VP Engineering
> > American Fire Sprinkler Assn. --- Fire Sprinklers Saves Lives
> > Dallas, TX
> > http://www.firesprinkler.org
> >
> >
> >
> >
> >
> >> On Apr 10, 2014, at 1:37 PM, Steve Leyton <[email protected]>
> >> wrote:
> >>
> >> Anyone out there, committee members or clairvoyants, who can say why
> >> this illustration shows a dry-pendent sprinkler in what appears to be a
> >> non-conforming orientation?
> >>
> >> Thanks,
> >> SML
> >> _______________________________________________
> >> Sprinklerforum mailing list
> >> [email protected]
> >> http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprink
> >> ler.org
> >
> > _______________________________________________
> > Sprinklerforum mailing list
> > [email protected]
> > http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkl
> > er.org
> _______________________________________________
> Sprinklerforum mailing list
> [email protected]
> http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org
> _______________________________________________
> Sprinklerforum mailing list
> [email protected]
> http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org
_______________________________________________
Sprinklerforum mailing list
[email protected]
http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org
