one-shot Posted May 28, 2017 Share Posted May 28, 2017 Matches perfectly with a Navy Type "B" from the 1920s in size and most markings. I suspect a car or motorcycle usage as aircraft would have markings. Harold Link to comment Share on other sites More sharing options...
Spinneyhill Posted May 28, 2017 Share Posted May 28, 2017 (edited) Ask the www and ye shall find... https://aeroantique.com/products/victometer-centrifugal-tachometer-type-b-us-navy-1920s says this about the Victometer: "Tachometer, Victometer Centrifugal, Type B, US Navy 1920s This is a WWI or Post WWI-vintage aircraft tachometer used by the US Navy, Type B Victometer made by the Jos W Jones Co. Can be seen on the Spirit of St.Louis instrument panel, see photo. This is a centrifugal tachometer: as the rotation of the engine shaft rotates a cable attached to the case, weights rotate around an internal axis. The weights move outwardly due to centrifugal force, which pull a brace attached to the spring-loaded pointer. As the brace is pulled by the centrifugal force of the weights, the pointer is rotated clockwise, thus indicating RPMs. Very cool. " What is the patent date etc. on the second one? Edited May 28, 2017 by Spinneyhill (see edit history) Link to comment Share on other sites More sharing options...
one-shot Posted May 28, 2017 Author Share Posted May 28, 2017 Pic one is my reference, same one as you found. Next two pics are the item I have in my possession. Look/size exactly the same except for face markings. I find no pat date, except for the 5 numbers on back. With out aircraft markings I suspect a car or motorcycle usage. I hope motorcycle. harold Link to comment Share on other sites More sharing options...
Spinneyhill Posted May 28, 2017 Share Posted May 28, 2017 (edited) Ask the www again and you find the patent: 1920 Feb 10. US1330120A.pdf Here is the first part of the figures from the patent: In my opinion it is very unlikely to be a m/c with that mounting. It could have been used in non-navy and non-military aircraft? Or even cars? Edited May 28, 2017 by Spinneyhill (see edit history) Link to comment Share on other sites More sharing options...
one-shot Posted May 28, 2017 Author Share Posted May 28, 2017 The bad part is I don't know where or when I acquired it. I have some old plane stuff, WWII and before, but that is stored separate. That's next on the cleaning out list. A limit of 2500 RPM is not much. It needs a home, so the quest goes on. Thanks harold Link to comment Share on other sites More sharing options...
mikewest Posted May 28, 2017 Share Posted May 28, 2017 What is the price? Mike Link to comment Share on other sites More sharing options...
one-shot Posted May 29, 2017 Author Share Posted May 29, 2017 Don't have a number in mind. One ear/attachment point is missing. left upper. None of the screws are marred, so I know/assume it has not been messed with. Make me an offer. Harold Link to comment Share on other sites More sharing options...
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