Welcome to the original Rectal Temperature Message Board.

Rectal Temperature, Normal 100.2° F or Less.

VoyForums
Oklahoma Disaster Relief










American Red Cross
Together, we can save a life


See Kare11.com's page for more ways to contribute.

VoyForums Notice -- Quick Contributions:
Donate $10 to the Red Cross: Text the word REDCROSS to 90999
Donate $10 to the Salvation Army: Text the word STORM to 80888
* The charge will appear on your cellphone bill.

[ VoyUser Login optional ] [ Contact Forum Admin ] [ Main index ] [ Post a new message ] [ Search | Check update time | Archives: 1, 2, 3, 4, [5], 6, 7, 8, 9, 10 ]
Subject: Re: Keepsake thermometer


Author:
Caleb76
[ Next Thread | Previous Thread | Next Message | Previous Message ]
Date Posted: Thursday, July 28, 2011, 09:02: pm
In reply to: Matt AS 's message, "Re: Keepsake thermometer" on Tuesday, July 19, 2011, 06:42: am
 The older pear-bulbed thermometers were helium blown into a mold with a very thin, chrome-molybdinum wire at the center to form the mercury channel. Made just like a bottle, but with the precision of a gun barrel. But to do so, a thicker rod of glass had to be incorporated to keep it from cracking from helium pressure. This explains the exceptional durability of thermometers up through the late 70s to early 80s.
Most thermometers made from then on were from a preformed rod of glass of two cross sections, then heated and fused under a furnace to make it soft enough for argon gas to blow a small bulb into the tip. A cost saving measure that ended up compromising quality.
[ Next Thread | Previous Thread | Next Message | Previous Message ]

[ VoyUser Login ] Not required to post.
Post a public reply to this message | Go post a new public message
 Note: This forum is moderated -- new posts are not visible until approved.
* HTML allowed in marked fields.
Message subject (required):

Name (required):

  Expression (Optional mood/title along with your name) Examples: (happy, sad, The Joyful, etc.) help)

  E-mail address (optional):

* Type your message here:

Choose Message Icon: [ View Emoticons ]

Note: This forum is moderated -- new posts are not visible until approved.

Notice: Copies of your message may remain on this and other systems on internet. Please be respectful.
 The Voy.com User Agreement applies to all visitors.

[ Contact Forum Admin ]

Forum timezone: GMT-5
VF Version: 2.94, ConfDB:
Before posting please read our privacy policy.
VoyForums(tm) is a Free Service from Voyager Info-Systems.
Copyright © 1998-2012 Voyager Info-Systems. All Rights Reserved.
[ Search the Rectal Temperature Message Board. ][ Main index ]  [ Archives: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 ]