BulbCollector Forums

BULB DISCUSSION BOARDS => Antique Bulb Discussion => Topic started by: Tim on February 24, 2001, 05:14:00 pm

Title: That little patent label in the stem......
Post by: Tim on February 24, 2001, 05:14:00 pm

Everyone probably has a few old bulbs in their collection that have a tiny piece of paper wedged into the glass stem like this:
 (http://www.bulbcollector.com/gallery/Antique_Light_Bulbs/post_1900/Everything_Else/Patent_Stem_Label.jpg)
The label contains patent numbers that are associated with the manufacturing process of the lamp. I thought it might be interesting to share the information behind those these numbers so here's some excerpts from the original patent documents:

---

537,493:
 (http://www.bulbcollector.com/patents/537493-2.gif)

---

537,693:
 (http://www.bulbcollector.com/patents/537693-1.gif)

---

726,293:
 (http://www.bulbcollector.com/patents/726293-1.gif)



------------------
-Tim
BulbCollector.com (http://www.bulbcollector.com)
DewCollector.com (http://www.dewcollector.com)

Title: That little patent label in the stem......
Post by: Poppa Bill bulbs on February 28, 2001, 10:34:00 pm

Hey Tim,
   Thanks for that information about that label in light bulb, I meant to inquire about that. Thats what I thought but was unable to read much of any of them.
                Poppa Bill

Title: That little patent label in the stem......
Post by: Bob Masters on March 01, 2001, 09:31:00 am

Look at the clarity of that photo. I'm sure that more than once I've risked being cross-eyed, or perhaps blindness trying to read what's on those tags !
Thanks for "clarifying" the question. I never
understood what the purpose of those patents was  :-)