Thread: Hollar Round Door Vaults

Tom, in my experience the tear gas types were usually installed on less than secure large old fire safes used by jewelers. This type of safe did have the space needed for displays to be easily held. A lot of these did not have relocking devises and were often attacked at the dial in punching attacks sometimes successfully. So the unit is commonly mounted behind the lock itself. With the tear gas installed you may get the door open but you wont be real particular about what you grab other than something to cover your face. Of cpurse any explosives or heavy enough jolts to the safe could also break the glass. I did some reading about WWI warfare gases and found hundreds of chemical mixes were developed offering different results. This would explain why their use commercially as a deterrent started to show up after the war. Doug

I have never heard of anything other than chlorine being used in the trenches over this side of the pond, but it would be odd if they werent investigating alternatives.

The Germans started out with chlorine and ended up using mustard gas. Trying new things was the direct result of a reasonably effective defense coming into use. Much the same as the safe business. The Allies main gas was chloropicrin (trichlornitromethane). I think I got that right.

Getting back to the round doors --

The only Hollar patent I have found so far is 533,298 (1895) for the boltwork on a rectangular door. There should also be at least one more patent, for his time lock. Does anybody know of Hollar's other patents?

I had 6 but I knew I had seen more so I googled Hollar and came up with about 14 more. The specific ones you asked for are 621,341 for the round door I posted and 650,842 for the winder. Also 545,021 for the early version of the winder. i would list the rest but they are easily found Doug

OK, I figured out what I did wrong. I trusted Google Patents. I searched just for the inventor name "Hollar" but in fact their OCR-ing of the patent images is so absurdly awful it only showed up one patent. Once I changed my search to match "Hollar" in any field, many more matches (including a few false hits) showed up.