The Electrical Contractor Network

ECN Electrical Forum
Discussion Forums for Electricians, Inspectors and Related Professionals

Books, Tools and Test Equipment for Electrical and Construction Trades

Page 1 of 2 1 2 >
Topic Options
Rate This Topic
#170944 - 11/15/07 02:06 PM Can You Identify This?
Webmaster Offline

Administrator
Member

Registered: 10/07/00
Posts: 3142
Loc: NY, USA
Can Anyone identify this?

submitted by:
Michael Thomas
Paragon Home Inspection, LLC


Top
Super Rod Cable Installation Tools

Super Rod Cable Rod System
Super Rod Cable Rod System -
Voted
Best Product of the Last 50 Years by members of NICEIC

#170945 - 11/15/07 02:19 PM Re: Can You Identify This? [Re: Webmaster]
P38J Offline
Junior Member

Registered: 01/31/07
Posts: 8
Loc: Arlington, WA.
If I'm not mistaken, that is called a "rate of rise" used in fire alarms. Senses when the air temp rises too fast and trips the alarm. Or burns a element on the inside and trips. I've seen them but never actually taken them apart to see what makes em tick.
Jerry

Top
#170973 - 11/15/07 10:46 PM Re: Can You Identify This? [Re: P38J]
noderaser Offline
Member

Registered: 03/01/07
Posts: 405
Loc: Portland, Oregon, United State...
AFAIK, they were used a lot in commercial installations in the late 50's and early 60's.
_________________________
http://www.hsiprodsvcs.com/

Top
#176038 - 03/18/08 05:22 PM Re: Can You Identify This? [Re: noderaser]
harold endean Offline
Member

Registered: 02/16/02
Posts: 2248
Loc: Boonton, NJ
I have seen them and I have installed them They are "Rate Of Rise" heat detectors. They could also be "Fixed Temp" heat detectors. You would use a fixed temp in the attic, because a Rate of rise, might go off on a hot summer day. They replaced another type of fire detectors. ( I wish I had pictures of them.) The older types of fire alarms relied on copper piping filled with air. The "Heat Sensor" was a bigger copper tube connected to the smaller piping. This whole piping system was pressurized. If there was a fire, the pressure would build up in the pipes and set off the fire alarm system. They were very difficult to trouble shoot if you got a leak. You would have to walk around the whole building with soapy bubble water. You would spray the bubble water onto the copper pipes and look for leaks.

Top
#176045 - 03/18/08 07:10 PM Re: Can You Identify This? [Re: harold endean]
leland Offline
Member

Registered: 08/20/07
Posts: 856
Loc: Lowell area, Ma. USA
AFAIK-- Excuse my ignorance. But what the heck does this mean? I see it every where and feel 'so outa the loop'.

"Rate of rise"- heat detectors need to see a certain rise in temp with in a few seconds. Say 20 deg in 20 sec.
"Fixed temp"- heats need to reach the desired temp before activating.
And the new ones- 1980 and beyond= are combo if so desired.

HID- (wording escapes me now- sorry)-"The older types of fire alarms relied on copper piping filled with air. The "Heat Sensor" was a bigger copper tube connected to the smaller piping. This whole piping system was pressurized. If there was a fire, the pressure would build up in the pipes and set off the fire alarm system. They were very difficult to trouble shoot if you got a leak. You would have to walk around the whole building with soapy bubble water. You would spray the bubble water onto the copper pipes and look for leaks."

Harold, your correct. these are very good. But. only filled with Ambient air. when heated the air pressure rises closing the ckt. Or pessurizing the solonoid.

Still VERY common in special hazard fire Suppression applications. Where no electrical current would be acceptable..
Flamable storage etc.

Top
#176065 - 03/19/08 08:02 AM Re: Can You Identify This? [Re: leland]
Retired_Helper Offline
Member

Registered: 03/13/07
Posts: 167
Loc: Maine
 Originally Posted By: leland
AFAIK-- Excuse my ignorance. But what the heck does this mean? I see it every where and feel 'so outa the loop'.

AFAIK = As Far As I Know. Don't feel badly. I'm still scratching my head over IIRC.

Top
#176068 - 03/19/08 08:07 AM Re: Can You Identify This? [Re: Retired_Helper]
n1ist Offline
Member

Registered: 02/13/02
Posts: 176
Loc: Malden MA
If I Remember Correctly...

Top
#176074 - 03/19/08 12:24 PM Re: Can You Identify This? [Re: n1ist]
Retired_Helper Offline
Member

Registered: 03/13/07
Posts: 167
Loc: Maine
 Originally Posted By: n1ist
If I Remember Correctly...


You know, I thought of that, after I posted. That's the story of my life, great ideas that come too late. Thanks for your confirmation. \:\)

How's Malden, by the way? I lived there, at that big complex on the Hill, Kennedy Drive, back in 1999.


Edited by Retired_Helper (03/19/08 12:26 PM)
Edit Reason: had to mention Malden

Top
#176577 - 04/06/08 02:09 PM Re: Can You Identify This? [Re: Retired_Helper]
jes Offline
Member

Registered: 07/12/02
Posts: 103
Loc: CT
The device is known as a 'Fyrindex' thermostat and was made in both fixed temperature and rate-of-rise versions. At some point in the life of the product is was made by the Kidde Corporation. They are no longer produced.

Top
#176647 - 04/08/08 01:22 PM Re: Can You Identify This? [Re: jes]
wa2ise Offline
Member

Registered: 11/29/02
Posts: 771
Loc: Oradell NJ USA
Those were common in college dorms, back in the mid 1970s. In the halls and sometimes in each room. Some also had scorch marks from idiot prankster students holding cigarette lighters near them, seeing if they could be set off...

Top
Page 1 of 2 1 2 >



ECN Electrical Forums - sponsored by Electrical Contractor Network - Electrical and Code Related Discussion for Electrical Contractors, Electricians, Inspectors, Instructors, Engineers and other related Professionals