Light Switch Design?

[Tom Wesenberg]

Tom,
I have tested and checked it out. There is no obstruction. When I look down through the top, I can see that it is not built like my 4 position cases.

Note that the case and the contact plate has a raised index tab. The contact plate will not fit into a 4 position switch case because of the extended tab.

Does your six contact point plate have the raised index tab?

I just took the lighting switch off of my '28 panel delivery. It has the case with the very very small tabs and it has the four copper contact points like you photograph below. However, the contact plate that was used was the later nine contact point part for the Twolight. I guess that who ever worked on this truck used the later reproduction wiring harness and got it to work with the three position upper case.

Neil,
You are right, my 6 button plate does have the same bump as yours. I'll bet we have the last two in existence and they are worth a fortune.

I'll have to check my switch bodies to see if any would take this rare contact plate.

 

[Ron in Quincy]

Tom and Neil,

Those plates and housing with index tab are a new one on me, never seen before. As you say Tom, they are probably quite rare.

Maybe Pluck could check this one out for Assemble Letter ?

Ron

 

[Neil Wilson]

I checked the MAFII data base and found part number 11673 has eight entries (i.e. engineering drawing dates). The 1st generation (A-11673) was names "lighting switch back assembly". The other two generations (A-11673-B and C) are named "lighting switch plate assembly".

A-11673-B drawing dates are 2/27/28, 3/7/28, and 12/6/28 when it became a BR part. So, these three drawings could show the unique designed plate with the extended index.

I will read this thread when I return from vacation next week.
Regards,
Neil

 

[d.j. moordigian]

Neil, Ron, Tom,

You guy's got me digging for my stuff on my 8-14-28 car. My parts match that of Toms,
minus the dimpled base,( # 5 post) that I'm hunting for! Is this correct for my car? Are
the internal parts for the bolt-on light s/w the same as those?

Thanks, Dudley

PS....bottom photo #5

 

[Steve Plucker]

When you see that a part is called "xxx xxxxx xxx Assembly", what you are dealing with is a part with 2 to X number of parts to make the "assembly" of that one specific part.

So the next step, in researching a specific "assembly" say A-11673, is that you must break it down because every "single" part on that A-11673 assembly ALSO has an "A" part number.

NOW...you must try to define just what part number the part with the dimples is.

When you discover that part number, I think the information contained within, weather it be a drawing or a Part Release (E.I's Engineering Information), it most likely, but sometimes not, will tell you the specifics of the part itself.

Pluck

 

[Ron in Quincy]

d.j. (Fresno)

The very early switch is entirely different; the wires plug in to the contact plate; the end of the horn rod extends into the contact plate and is held in place with the small head bolt and clamp which is part of the contact plate. Sounds confusing, you would have to see a switch in order to fully understand.

Ron

 

[Bruce Rossiter]

I just dug some of my flea market finds and a couple of the covers have a flat side on it.

 

[Ron in Quincy]

The cover with the flat side is later V8.

Ron

 

[Bruce Rossiter]

The cover with the flat side is later V8.

Ron

Thanks Ron for the V8 information on the light switch.

 

[Neil Wilson]

Hello Dudley,

The bolt on lighting switch assembly (A-11653) is shown in the attached pictures. This switch was eliminated in February 1928. None of the parts for this assembly are the same as the lighting switch assembly which uses a bail.
Regards,
Neil

 

[Neil Wilson]

The attached two photographs shows the A-11654 assembly parts (i.e. the first bail mounted lighting switch used with head lamps with fluted lenses). It is a three position switch. This switch started in February or March 1928 after the bolt on lighting switch was discontinued.
Regards,
Neil

 

[Neil Wilson]

The following two pictures show a possible alternate design of the A-11654 Lighting Switch assembly. This switch is not mentioned in the Judging standards. However, it is a three position switch and would work on the head lamps with the fluted lenses. Note the unique raised index in the body assembly and the plate assembly.
Regards,
Neil