jar wrench

[jimwrench]

 Charley Johnson patented this wrench in 1920. Heard two guys at auction discussing what oil filters this would remove. Don't know what oil filter diameters were in use in 1920 but am sure that was not Charlies intent. I have one or two other jar wrenchs so a new collection is started. 6-8-20 stamped on wrench but pat not mentioned.

[EVILDR235]

I don't think they had spin on filters in the 1920s. If they had filters at all in that time frame, it would have been cartridge type. I believe spin on type appeared in the late 1940s with engines like Cadillac and Oldsmobile OHV engines. I cheated and checked the origin of spin on filters was 1955 and were full flow type. Canister types were bypass type.

EvilDr235

[turnnut]

Jimwrench,

the tag on your jar wrench has the patent number on it   1342848

go to DATAMP and enter that number, the patent is there.

[oldgoaly]

oil filters in the 30's and 40's were these canister type, this was a small add-on made by Carter carbs in St. Louis. I've this one and a larger canister.

[jimwrench]

 Datamp is where I got the patent number on the tag.