I have no idea so would appreciate assistance.
RADU
RADU, post: 409530, member: 222 wrote: I have no idea so would appreciate assistance.
RADU
My search says it looks like a perambulator or waywiser.
looks like a pulley wheel, or similar
Hey Cuz, I think that Conrad is right, it's a laundry line pulley! Albeit, a bit fancy but it would sure work well!
Does it have markings around the rim?
Before you start dragging it all over the place be sure to tie a red handkerchief securely to one of the spokes so you can count the number of revolutions to multiply by the circumference.
I bet that it's a pulley used to measure weights accurately. (the laundry wheel picture was a joke, Cuz) There's probably another box with weights.
Possibly used in measuring precise baselines where an extension wire is attached to the end of the invar tape which then runs over the pulley which has a weight to ensure the correct tension is being applied to the measurement.
I thought it may measure small changes in distance not
J. Penry, post: 409562, member: 321 wrote: Possibly used in measuring precise baselines where an extension wire is attached to the end of the invar tape which then runs over the pulley which has a weight to ensure the correct tension is being applied to the measurement.
Jerry I think you may be on the money , but with pulley at left side not top ie rotate your pic anti clock wise 90 degrees so a standard tension weight can be added for a 5 chain steel tape to measure precise distance supported off the ground or by catenary. Suggest as brass it would be associated with steel rather than invar.
J. Penry, post: 409562, member: 321 wrote: Possibly used in measuring precise baselines where an extension wire is attached to the end of the invar tape which then runs over the pulley which has a weight to ensure the correct tension is being applied to the measurement.
The sketch is wrong, the pulley bracket should be at 45å¡ away from the tape as the weight should equal the horizontal pull on the tape. Physics 101.
Paul in PA
I have one exactly like it, not brass though.
It belonged to my grandfather, a blacksmith. It was used to measure the circumference of wagon wheels.
Mine also has a circumference counter.
Paul in PA, post: 409664, member: 236 wrote: The sketch is wrong, the pulley bracket should be at 45å¡ away from the tape as the weight should equal the horizontal pull on the tape.
I had that thought, too, although it isn't really important to the concept Jerry was showing. If we're going to be fully accurate, we need to take into account the weight of the pulley itself so the angle will be a little downward from 45 degrees.
Dave Lindell, post: 409667, member: 55 wrote: used to measure the circumference of wagon wheels
Does this one have a circumference that is convenient, i.e. even feet or inches? Does it have a scale engraved on it?
Since it was brass, I wondered if it had some nautical application but nothing comes to mind.
Plus the carry box doesn't make sense.
Robert Hill, post: 409673, member: 378 wrote: Plus the carry box doesn't make sense.
I thought this was weird too; why would you need to keep a brass pulley in a box like that?
Is it old?
Brass looks lacquered.
Boxes for those sort of devices would have finger joint or dovetails.
Felt looks newish.
Maybe box made relatively recently?
Timber? Mahogany? Not old cut. Looks modern tropical timber.
To me looks bit 'manufactured'. Modern day brass knockoff (well finished) from India?
But difficult to really judge from a photo.
All that aside I can't comment on use.
Robert Hill, post: 409673, member: 378 wrote: Since it was brass, I wondered if it had some nautical application but nothing comes to mind.
It's obviously Christopher Columbus's pizza cutter...a rare historical item that belongs in a museum.
The outer edge looks round bevelled, at least from the picture. If it's round bevelled it supports cable or wire ?
James Fleming, post: 409730, member: 136 wrote: It's obviously Christopher Columbus's pizza cutter...a rare historical item that belongs in a museum.
Been going to all those DC pre-inaugural parties with free booze, haven't we? 😉