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Teens/ 20's Vacuum -Pressure gauge , Help ID


roysboystoys

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I find a lot of gauges that have " Retard" on face, mostly pressure .

This is a vacuum / pressure gauge.

Face has " Retard" , US Gauge , AD 2734

I cleaned it up some , no name or number on housing , in or out.

Has a Buick look to it, but my google skills are lacking.

Any one recognize the shape or gauge?

Thanks

Roy

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Edited by roysboystoys (see edit history)
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Leif , it sure looks like it. This is a compound gauge with built in " Retard" ( damping)

What would a pressure / vacuum gauge be used for on a 1924 Packard?

Usually they are used in pumps or refrigeration systems.

Power brake? , vacuum fuel tank? water pump?

I've never seen a vehicle with one before.

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2 hours ago, roysboystoys said:

Leif , it sure looks like it. This is a compound gauge with built in " Retard" ( damping)

What would a pressure / vacuum gauge be used for on a 1924 Packard?

Usually they are used in pumps or refrigeration systems.

Power brake? , vacuum fuel tank? water pump?

I've never seen a vehicle with one before.

A vehicle fitted with a supercharger?

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20 hours ago, Stude17 said:

A vehicle fitted with a supercharger?

 

I can't remember or find any reference to supercharger for Packard. This was my first thought , but 30 pounds boost is highly unlikely. Thanks

Edit , I should have quit looking at so many gauges on google. They are almost all 30 pounds pressure,

This is 10 pounds at the 3/4 range as Stude17 observed. Could very well be Supercharger.

A friend suggested Aviation , he said Packard supplied engines for Aero planes?

The housing could have been supplied to other makers?

Edited by roysboystoys (see edit history)
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3 hours ago, Stude17 said:

Although the gauge might read  0-30 psi by the way it is calibrated I would suggest it is designed to show the range 0-10 psi very accurately and would be used  on equipment ( engine supercharger?) to measure pressure in this range.

Thanks for the observation . I edited my last post. Seems likely now.?

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Edited by roysboystoys (see edit history)
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