Doug MacQueen wroteHi Jack If you do a search on here for Hibbard Rodman Ely you will find more postings. At this point I have about 25 HRE patents and a few NYM patents. One of the more interesting things about the manganese cannonballs was how the doors were cast leaving the bolt hole areas to be filled later with a lower temperature and machinable metal. These filled areas are quite noticeable and gives good evidence that manganese was not machinable at that time. Also it seems all or most of the officers of both companies lived in Plainfield or High Bridge so I suspect the New York name was purely for advertising purposes. TISCO did make most of the manganese cannonball castings for several other manufacturers. The only one that I am sure of that wasn’t was Ely Norris. They were cast by what later became the Bethlehem Steel Corp. Glad you found the forum. Doug
Hi Doug & thanks for the welcome!
Manganese safe construction was a very novel approach compared to the prior composite material approaches.
Some further notes on Hibbard:
His earliest patent in 1891 had him living in Pittsburgh, so aopparently that’s where he learned his metallurgy & metal working knoweledge. His last patent, filed in 1921, was assigned to Hibbard Process Corp & involved metal smelting.
A couple of his patents give his place of residence as North Plainfield before he moved a few miles to Plainfield.
I have one patent to TISCO auithored by him in 1895, 24 to H-R-E, 4 by himself to MSS, 1 co-authored by Stone, one by Peck, and one by Gaston. Including one patent each to Fish & Smith, that makes 10 MSS patents in my files. (My totals are skewed a bit because I haven’t included Hibbard’s patents on metal grinding equipment). Hibbard also authored 6 patents with no assignee.
There are also 4 GB patents to Hibbard that I found in the EPO. They have no assignees & I haven’t had the time to match them up with US equivalents if any. They are GB190009001, GB1900200449, GB190115423 and GB190115424. In the British style of the time Hibbard’s occupation was given as ‘Inventor.’
Hibbard was a prolific innovator & an interesting person to study. Interestingly he submitted a number of patents to the USPTO at the same time so a lot of his patents are numbered in sequence.
I found a second Hibbard patent on a ccircular vault door that also looks very similar to that photo on Ebay. It’s attached below.
Jack
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