VCCA Home Forums TECHNICAL - 1945 AND NEWER 1946-1948 47/48 jacks part 2

Research!!!!Stay tuned.

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Might want to print and save.

It seems that the "W" might stand for Walker Manufacturing Company of Racine Wisconsin. Gene, you know these people?? Yes, the muffler people.

The patent # 2433537 is for the lifting mechanism only. If you read page 2 column 2 #5 you will see it is used with base patent # 2400235 held by F. Johnson also made by Walker. So it seems they are used together.

To be continued.

I don't get any text or?

Do a search of vintage Walker bumper jack......there they are.
Even my '50 jack is pictured

Will take a closer look at the base tomorrow. I took pictures and will shoot them to you in the morning. I have never set up to post pictures here on the VCCA.

Gene, you must have Adobe Reader on your pc to view Adobe files. If you do not have go here and download. It is free and easy. When the first page comes up, be sure you UNCHECK the box that has get Chrome if you do not want it.
Adobe Reader

Part two from above: Adobe Reader required to view.
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Benjamin F Johnson holds the patent for the base. At the end of column one on page two it states, "2 is illustrated as embodying the invention described and claimed in the copending application of Melvin G. Ward, Serial No.573,933 filed January 22, 1945."
So the jack was patented by Mr. Ward and the base was patented by Mr. Johnson and was produced by Walker Manu. as a unit.

So, on WHAT DATE did Chevrolet start to offer this jack, either as a accessory or standard is unclear to me.

Thank you Keith.
The pictures I received show the same jack and base as shown by Gene. 8"x8" confirmed.

I do have Adobe reader installed but get nothing
What I did find was a search on Bing "antique Walker bumper jacks" with photos of new and used Walker bumper jacks as well as other jacks.

Hey Chef, what about jack number 3? Any luck?

I e-mailed Dale for a picture of his jack. He answered with , " I believe I have the wrong jack, based on the thread". He is going to check with Dave.

Bruce, help me keep this alive until we find one that meets the specifications for '48?

Sorry Russell,should arrive 1st part of next week

Bruce, well.... it is now late next week. Any update???

Dale, have you found out anything from Dave???

The new "Jack In The Box" should be on my door step,..Can't wait ...I should get home in about 6 hours or so...

Good luck, waiting for pictures.

Jack #3 Results

Dick's



Ed's



Mine



Dick's



Mine



Mine new one has:
The W
The rounding on the bittom of the shaft
The spring on the bottom of the shaft

BUT SAYS:Patent Applied For

OK Professor Russell,what do you think???
Could these a 46,47and 48 Jacks ??7

I am convinced that these are the correct jack for those years. Mine has a patent number but my 48 is a late production car in 48, earlier jacks probably had the patent applied for stamp.

Some great investigation!!

Looks good! The ONLY thing for you to check, as far as I know, is the lower lift height. Put the jack in the stand, lower, and measure to the lip where the bumper rest.

As mentioned a few pages back, according to the spec. sheets each jack for '46, '47', and '48 had SOMETHING different. What you ask.... '46 is 6", '47 is 6 3/8, and '48" said it is 7 5/8". Now I ask..... WHY??? I Have no idea. Make no sense to me. Only relying on the spec. sheets for info. For '48, that info was confirmed in the '49 Engineering Manual Gene has for it states that the jack height changed from 7 5/8" for '48 to 6" for '49. That is all I have to go by.

Up in the thread going on about judging and having documentation to prove you are right, well, according to the spec. sheet it would have to be 7 5/8" for a '48 to be correct. IS this statement right or wrong? Their may be "no such animal", I do not know! Until one turns up it only exist on paper.

This discussion is only about the Chevrolet supplied jack that came with the car when new.

As Ed stated about the patent number, the patent was issued in December of '47. So when they started stamping that number on the jack would have been sometime after that. At least that's my guess. Also, Ed's jack was in his car in 1952 when his family bought it, and it has the patent number stamped on it, I for one, find it hard to dispute it is not a 1948 jack.

If you drop the jack all way down 6 3/8",if you remove the jack from the stand 6"no combination will result in 7 5/8"...1947 jack I'm fine with it...closer then the 41 I had in car

Gene, you made this post in the first thread started by Dick when all these jack questions started.

If you will, please confirm that the last line above was in the '49 Engineering Manual as stated. PLEASE!!!! I will explain after you answer.

No, I am not letting this go just yet.

That was added by me.

Gene, thanks for clearing that up. It had me confused because the '47 jack was already that way. Thanks again.

It almost seems that the 48 accessary jack "shown in the book" and the 49 jack are one in the same because on the thicker shaft and offset base...The next version which Gene has,52-55? The base changed slightly and the roller was added....When I look at the jack with the roller, if it was removed and the 2 strips of metal were bent inward it would be almost identical to the other side as is on the 48 accessory jack, hence a possibility the same pattern was used for both?

I will post a picture of my thinking tonight. You are on the right track.

For some reason I just can not commit to going ahead with my project. This fight is too many rounds long. May just throw in the towel!

Throw in the towel??I don't see you as one of those types Russell...You never told me if you purchased that base with the circle on the front???I wish there was somebody out there that owned the 48 accessory bumper Jack??I know Johnny has the hydraulic one