Wahlquist pipe locator?

[NOLA_Ken]

Ok, so the neighbor at my new jobsite is clearing out the last of his dads estate, and asked if he could throw a few bags in our dumpster.......Naturally I said sure, and proceeded to dig through all of them I ended up with a truckload of stuff, too much to list here, and I'm still sorting it. I'll get some pics up soon. Anyway, there are two of these.

The plaque on the side says "Wahlquist pipe locator, -transmitter-, model 113, nillson electrical laboratory inc., New York NY" On the top there is a switch with off, on and int. and two contacts marked + and - 6v the other three contacts are labeled high common and low. The other side is marked in stencil, NOPSI ENG DEPT which is New Orleans public service inc.

When I grabbed them I thought for a second they were blasting boxes.....but no such luck. Now I know that a pipe locator is basically a metal detector, but these aren't like anything I've ever seen. Sorry about the pic quality in advance, I'm getting a new camera soon.

 

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[NOLA_Ken]

a couple more.

 

[mojjax]

Neat find ! Hears a PDF manual for a 715 .Yours looks much older .

http://www.google.com/url?sa=t&sour...WkxWwhD40uwSkC86Q&sig2=PdWZyMTv1LCpWl1TEp7rCA

 

[High Plains Digger]

Don't connect any dynamite to it until you are sure! Sure looks like some type of plunger box. Well, maybe not quite, but close. It's good when the trash comes to you.

 

[NOLA_Ken]

Don't connect any dynamite to it until you are sure! Sure looks like some type of plunger box. Well, maybe not quite, but close. It's good when the trash comes to you.

hehe, yeah well I don't happen to have any dynamite laying around, although some kids found some old sweaty stuff in a barn north of here not long ago. Glad i never ran into any of that.

 

[cw0909]

nola ken,ive never seen one of those pipe locators b4,can you get a better pic of this
id like to find the patent and see how it works

 

[NOLA_Ken]

nola ken,ive never seen one of those pipe locators b4,can you get a better pic of this
id like to find the patent and see how it works

Can't get a clearer pic with this camera, but the plate says : 5069600 250 r.p.m.
Delco
Appliance
Division
General Motors Corporation
Rochester NY
Made In Usa

It's a motor that seems to be geared down to turn slowly, there's a square block of Bakelite on the end of the shaft and when it rotates it closes a set of contacts. There's no patent number anywhere on the device that I have been able to locate.