Did Sterling buy the Denver Siren patent?

[LukeH]

Notice the Denver siren. Below the picture, if you zoom in it says "The Sterling Siren Fire Alarm....I wonder if Hendie and Bolthoff sold the patent to Sterling? the add is dated 1918 acording to the seller.

[holler]

Notice the base under the motor is the same base that was used on the Sterling M sirens.

[Mark N]

Maybe it is a new model of sterling not discovered before...

[OhioSirenHunter]

It resembles an M-5 on a platform showing how the rotor goes in. I kind of looks like this (Which I think is a Sterling as well). http://www.youtube.com/watch?v=7YykIAgEGYE




Feel free to correct me, because I know I'm probably wrong.

[LukeH]

Notice the base under the motor is the same base that was used on the Sterling M sirens.

Also the same on the Denver Siren in Jeterville, VA

Not my picture..



Typical double headed 4 rotor Denver Siren, Grand Ledge, MI EMA:



I've noticed on some Denver Sirens, they have caps over the rotors as pictured above. It almost looks like the one in the add has caps over the rotors. I'm willing to bet Sterling bought the patent on the Denver Siren some time in the late 1910's, and marketed it as their own.. I've never seen a name plate on one of these sirens with the caps on them though. It would be a miracle if someone could get a picture of the tag on the "newer" Denver Siren and maybe prove my assumption to be a fact...It may even explain that Denver Siren/sterling looking thing Adam Pollack posted a few years ago as a prototype of some kind..

Credit to Adam:

[SirenMadness]

On their site, Sentry claims that Sterling made and sold washing machines at one point. Could outdoor sirens have been Sterling's departure from their original stuff after supposedly purchasing the Denver patent?

[LukeH]

On their site, Sentry claims that Sterling made and sold washing machines at one point. Could outdoor sirens have been Sterling's departure from their original stuff after supposedly purchasing the Denver patent?

It could be a possibility, Maybe that's how the Sterling Siren came to be. I don't believe the M series were patented until the mid 20's, Maybe the Denver with the caps on them were Sterling's first sirens...

[LukeH]

So basically putting everything together, Is Hendie and Bolthoff MFG and Supply of Denver Colorado patented the Denver Siren in 1915. In Circa 1918 Sterling bought the patent, added their motor mount, added caps to the ends of the stators, changed from Oiled bearings to seal bearings, and produced the single headed "Sterling Siren" fire alarm. which evolved in to the M series in the 1920's. That's IF I am correct. there is a BIG IF there.

[LukeH]

Well thank you much Sir! Very good closeup's! Is there any test videos of the above siren?

[500AT]

On their site, Sentry claims that Sterling made and sold washing machines at one point. Could outdoor sirens have been Sterling's departure from their original stuff after supposedly purchasing the Denver patent?

Ironically, the Federal Electric Company also manufactured washing machines, and small appliances before switching to outdoor warning sirens as their main business before World War I. It looks like both Federal, and Sterling took similar corporate paths into the emergency alerting field prior to the start of the Great War in Europe.