Another ebay acquisition. This is a celluloid bridge counter. It would have been handed out at expositions and trade shows. I don't know a thing...
Were you involved with the maintenance of these huge boilers?
Another old advert from the 1912 Practical Engineer. [ATTACH]
Good question. I'm not 100% sure. I've attached a catalog page from the 1928 catalog and the safety valve is listed as being for stationary or...
I recently found these full page adverts from old trade journals. [ATTACH] [ATTACH] [ATTACH] [ATTACH]
According to a gage catalog I just received a copy of, the body was made of iron.
Here's the gage illuminated. I'm missing the piece that would have hidden the shadow of the Bourdon tube in the center of the gage. I might have...
it would have been visible in a boiler room under low light conditions. Here's a catalog page rom the 1920 catalog.[ATTACH]
I believe it just reads the surrounding air pressure. I'm not 100% sure but there is no mention of mercury in the catalog descriptions.[ATTACH]
I also found a pocket size caisson gage used to measure air pressure. https://en.wikipedia.org/wiki/Caisson_(engineering) [ATTACH] [ATTACH]
I recently picked up an Ashton illuminated pressure gage. 14" diameter. The lighting fixture is missing but it looks like it won't be too...
I recently purchased this ink blotter circa 1898 trade show giveaway from the[ATTACH] eaway of an ink blotter relating to the Spanish American war.
American railroad bridges 1889 byCooper, Theodore, 1839-1919...
Bridgeport’s Chicago & Alton Railroad Bridge by Patrick McBriarty...
Maybe he wanted a "short commute"!!
Good question. See the attached below. My assumption has always been that the test gauges would be checked constantly to insure accuracy. An...
A pictorial history of the first railroad bridge across the Mississippi River and its three successors by Curtis C. Roseman...
Love those old postcards!
And the last few pages. [ATTACH] [ATTACH] [ATTACH] [ATTACH]
An Ashton brochure on the gage [ATTACH] [ATTACH] [ATTACH] [ATTACH]
