Another Steep Pitch Torrington Blade - On a circa 1938 Attic Ventilator

[Paul Michael]

Can't say no to a free fan, with local history! McLean Engineering was founded in Princeton in 1938 - by a PU graduate in fact. The company was bought up years ago, but still provided ventilators for the HVAC industry, notably Hoffman units.

I remember past posts abut 'Torrington' manufacturer's blades, but this is the first 'Airistocrat' blade I've seen. I'm sure someone here will beat me to looking up the patent number. (-;

 

 

 

Edited April 30, 2023 by Paul Michael

[Russ Huber]

Walter Upson patented blade assigned to GE.

[Russ Huber]

Walter Upson patented blade assigned to Torrington.

[Russ Huber]

Walter Upson patented blade to Torrington. 

[Paul Michael]

17 minutes ago, Russ Huber said:

Walter Upson patented blade to Torrington. 

This is the patent drawing I remember you posting,.... But it has FOUR wings... Does sheet 2 cover addition angles/wing count? I have to look again if this is 322 I though it sad 522... ? (-; Where's the patent for this one? I guess I *could* look it up. 

Edited April 30, 2023 by Paul Michael

[Russ Huber]

2 hours ago, Paul Michael said:

This is the patent drawing I remember you posting,.... But it has FOUR wings... Does sheet 2 cover addition angles/wing count? I have to look again if this is 322 I though it sad 522... ? (-; Where's the patent for this one? I guess I *could* look it up. 

The patent image doesn't may not be a dead ringer for what you have. The patent can represent something shape-form-function, or integral with your blade. Or, like some R&M fan motor patents, the patent number presence can be used to intimidate potentially copying the thing, and have nothing to do with the thing they are on. 🙂This is your other patent number.

[Russ Huber]

Wally Upson made the world of ventilation blades rock. This was sold to me years ago advertised as a boat propeller. 

Edited April 30, 2023 by Russ Huber

[Paul Michael]

1 minute ago, Russ Huber said:

Wally Upson made the world of ventilation blades rock. This was sold to me years ago advertised as a boat propeller. 

Haha I remember that blade-or another example of one for sale. I think I considered it... because... just... 🤷🏼‍♀️
And yeah I've spoken with patent lawyers I have an inkling of what a morass that world is...
I'm more interested in those 'other patents pending' . . . 

[Russ Huber]

Upson Torrington designs can move serious air. Image shared with me years ago of a KMC owned by Kirke West. That is an Upson Torrington blade.

[Paul Michael]

Well. The patent shared above 2,072,322 IS and ISN'T the correct one for this fan! The blade is clearly stamped 2,072,522—which is a fuel pump patent! Clearly, a typo!

The other patent listed, is below: