Charging Set, 300-Watt Variations

[David Dunlop]

There were a number of manufacturers of these charging sets during World War Two and shortly thereafter. I have several manuals for the ones built by Outboard Marine & Manufacturing Co. Of Canada Limited, based in Peterboro, Ontario and thought it might be helpful to post images of the various versions they made.

The first photo shows what is basically the standard wartime ‘Chorehorse’ for the Canadian and British Armies, side by side. On the left is the Charging Set 300-Watt MK I Canadian Pattern, OMC Model Number CHI-395-4. Note the use of a protective metal shroud over the Control Box as opposed to the steel rod cage employed on the British unit on the right. The designation for the British unit is; Charging Set, 300-Watt MK I British Pattern, with OMC Model Number CHI-395-5. Both these models are powered by the same 5/8-HP, single cylinder air cooled engine and the vast majority of parts are fully interchangeable. Both produce a 12-Volt DC output used for charging either a single 12-Volt Storage Battery, or two 6-Volt Storage Batteries in series.

The second photo is of the Charging Set 300-Watt Model CHI-397-2. This model was designed for use in the Army Office Lorry. It also has a 12-Volt DC output but the power plant is a 1.34-HP, single cylinder air cooled engine with a float feed carburetor, which requires a gravity feed gas tank. Only parts from the generator side of this model are interchangeable with the other two military sets.

The third photo is of a civilian Charging Set, 300-Watt, based on the wartime British Pattern unit, minus the Radio Filterette below the Control Box. Three models of this set were produced; EG1-300, EG2-300 and EG3-300. There is no mention at all in the manual of differences between the three and production was in the early 1950’s, so these model numbers might simply be based on the year of production: 1951, 1952 and 1953. These Charging Sets were targeting the rural farm electrification projects running in parts of Ontario and across the Canadian Prairies into the early 1960’s, in some locations. Getting Hydro Mains run to your farm was expensive, so DC 12-Volt Lighting Systems were very popular and these charging set show up quite regularly in these parts. These gasoline charging sets would be used to frequently compliment wind driven 12-Volt DC generators, which were still common to see sitting on old barns and farm houses, or free standing towers, well into the 1980’s in parts of Southern Manitoba, along with really ornate Lightening Rod setups.

There might be variations in design from other manufacturers in Britain, Canada and The United States, but these are the only manuals I have on hand.


David

[Bob Carriere]

Hi David

Why is it that all the surplus models we acquired/available in the Ontario area were the British pattern with a cage and mostly converted to 24 volts?????

One of these days I must try to make one run!!!!

Bob C.

[charlie fitton]

Originally Posted by Bob Carriere

Hi David

Why is it that all the surplus models we acquired/available in the Ontario area were the British pattern with a cage and mostly converted to 24 volts?????

Bob C.

My understanding is to make them NATO/ M series compatible. I once saw 3 in parallel set up to run a ground station for helicopter work.

f

[charlie fitton]

I have several years of brochures (downloaded) - I hope this one works.

The chorehorse was presented as the maid of all labours..light, pump, butter churn, and to charge your radio batteries. Run an entire farm on 300 watts!

This flyer seems to be home oriented, but it would certainly work for a cottage...

The local flea market also had an example of the same unit that we know and love, but in 110v... kick myself for not buying it.

[David Dunlop]

Hi Bob.

I suspect two factors are at play here.

In the Manitoba area, the ratio of these charging sets found with the grill guard setup vs the metal shroud, or none at all, is easily in the order of 4 to 1, or higher, but most, if not all would have been Canadian Pattern Models. Very few true British Pattern Charging Sets are ever found out here. That tells me the Canadian Army quickly discovered the grill guard setup offered better protection for the charging set and vastly improved handling ability for Signals personnel who had to hump them back and forth for remote operations. The latter point is probably one that was not fully appreciated at the start of the war when wartime use of wireless was still not fully thought out. But all this likely prompted a changeover to the grill guard format protection in all subsequent Canadian Pattern Models at some point in the second half of the war, if not sooner.

We do run across 24-Volt units out here (with grill guards) and as Charlie pointed out, most if not all of these, are probably postwar conversions of wartime charging sets to meet the 24-Volt upgrades to the newer generations of Military Vehicles and Signals Equipment.


David

[Bob Carriere]

..... the CMP early gathering at Odessa started out as a small part of the Odessa antique flea market..... there was a collector who showed up with a small flat trailer covered with all possible variety of these small generators.... some military some civilian, some with rope start, some with pedal start....... not a clue who he was.....wonder where that collection is now and whether it will ever surface again......

[Mike Kelly]

Originally Posted by charlie fitton

I have several years of brochures (downloaded) - I hope this one works.

The chorehorse was presented as the maid of all labours..light, pump, butter churn, and to charge your radio batteries. Run an entire farm on 300 watts!

This flyer seems to be home oriented, but it would certainly work for a cottage...

The local flea market also had an example of the same unit that we know and love, but in 110v... kick myself for not buying it.

Nice brochure ! do you have any more ?

[Mike Kelly]

This is a 1936 brochure. The first model appears to have bewn released in 1936 , made in Illinois USA - the "Iron Horse"
I think the Canadian made version, renamed the "Chorehorse" was produced later.

[charlie fitton]

Mike Kelly;Nice brochure ! do you have any more ?

Yes- Yes I do

And to add to the discussion - I think the engine is an Iron Horse - used for washing machines and the like, and the generator is a Chore Horse

[rob love]

Originally Posted by Bob Carriere

Hi David

Why is it that all the surplus models we acquired/available in the Ontario area were the British pattern with a cage and mostly converted to 24 volts?????

One of these days I must try to make one run!!!!

Bob C.

In Canadian service, they were part of the C-42 radio sets, which were 24 volt. If you were in an observation post, you could have the chorehorse set back a little ways and with the exhaust pipe slightly buried, it made almost no noise. When the C42 radios went surplus in the early 1980s, the Saskatoon surplus store also got the chorehorses. Some were used, some were still new in their crates with their lend lease decals.

[Alex van de Wetering]

It was my understanding that the ones without cage were intended for mounting on a vehicle (C8, C8A etc.) and the ones with cage were intended to be portable and to be used outside a vehicle, not necessary a difference between British and Canadian pattern (?).

On the left is the Charging Set 300-Watt MK I Canadian Pattern, OMC Model Number CHI-395-4. Note the use of a protective metal shroud over the Control Box

I missed out one of these sets with the shroud a couple of years ago (even though Hanno and I did have a great CMP-border raid that day). In case anyone has one of these shrouds laying around; I am still interested in one for my C8. I do have two Chorse horse sets, but both with cage.

[David Dunlop]

By 1944, the photos and illustrations in the 52-Set Manual and the Truck and Ground Installation Instructions for the 19-Set both have the 300-Watt Chorehorse Canadian as being equipped with the guard assembly.

I would not at all be surprised that as soon as Canadian troops encountered the British Chorehorse in the field, with guard, it proved too popular and the Canadian version was simply dropped. The guard makes picking the Chorehorse up and carrying it, extremely easy, especially if you have just shut it down after a long run. That engine gets hot and stays hot for a while.


David

[Bob Carriere]

.... is to take one down from the barn attic and have a go at make it run....

This tread will be very useful...... David and Jordan stay tuned...!!!!

[Colin Alford]

David,

I will attempt to fill in some of the gaps using these manuals. Collectively they cover CHI-395, CHI-395-1, CHI-395-2, CHI-395-3 (some prior to serial 27590 were designated Mk 1), CHI-395-4 (Mk1 Canadian), CHI-395-5 (Mk1 British), CHI-395-6 (Mk1 Star), CHI-396, CHI-397, CHI-397-1, CHI-397-2, and PU-5008/U (claimed to be modified CHI-395-6).