Dimensions of J&B 66 mirror

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dykker5502
Posts: 410
Joined: Mon Jan 07, 2019 7:01 pm
First Name: Michael
Last Name: Deichmann
* REQUIRED* Type and Year of Model Ts owned: 1914 Touring, 1921 Roadster P/U, 1922 Fordor (danish custom body)
Location: Rågeleje, Denmark
MTFCA Number: 29116
Board Member Since: 2007

Dimensions of J&B 66 mirror

Post by dykker5502 » Fri Nov 06, 2020 5:44 am

Hi,

I'm considering to 3D print a parabolic mirrors for my newly acuired J&B 66 headlamps, but I could use some dimensions of the original glass mirrors.

Outer diameter
Height of mirror when placed face down on a flat surface.

A picture (or drawing) of how the mirror is mounted in the back of the headlamp would also be of help :-)
2020-10-05 19.39.25.jpg
2020-10-05 19.39.13.jpg
(Pictures mostly to attract interest :-) )
Ford Model T 1914 Touring
Ford Model T 1921 Roadster Pick-up
Ford Model T 1922 Fordor (danish build body)
ECCT, Strobospark, HCCT(Sold), Rebuilding coils

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Corey Walker
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* REQUIRED* Type and Year of Model Ts owned: 1914 runabout, 1921 homemade truck, 1921 Speedster
Location: Brownsboro, TX
MTFCA Number: 51502
Board Member Since: 2007

Re: Dimensions of J&B 66 mirror

Post by Corey Walker » Sat Nov 07, 2020 10:52 pm

The diameter of the mirror is 6”. I can’t figure out how to get it out. It’s held in place by a sliding lock ring. When you twist it around it tightens in the mirror then you lock it with the screw. I need a mirror for one myself, here’s a picture of inside of it plus the ring by itself. I’d be happy to measure the mirror but it won’t go past the riveted on mounting brackets. Those pins in the locking ring stick out 1/16, maybe 3/32” but are the same diameter as the screw.
Attachments
D7732744-5910-4D44-8D82-3FF3B3EB775C.png
4B6D808B-69D3-4AC2-9769-1BC3DA7AF003.png
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BE985BFA-F34B-4BB4-B911-D192A722D393.png
Corey Walker, Brownsboro, Texas

User avatar

Corey Walker
Posts: 592
Joined: Sun Jan 06, 2019 11:46 am
First Name: Corey
Last Name: Walker
* REQUIRED* Type and Year of Model Ts owned: 1914 runabout, 1921 homemade truck, 1921 Speedster
Location: Brownsboro, TX
MTFCA Number: 51502
Board Member Since: 2007

Re: Dimensions of J&B 66 mirror

Post by Corey Walker » Sat Nov 07, 2020 11:12 pm

The mirror diameter is 6”. Iit’s held in place by a lock ring. There is a screw that slides in a diagonal slot and 2 pins the same diameter as the screw sticking out 1/16-3/32” engage a slot on the other side. You twist it to lock it. I can’t figure out how you get the mirror out. It’s loose but doesn’t want to go past the riveted on mounting brackets. I need a mirror myself, here are some pictures of the retaining ring set up.
Attachments
B0661405-567C-4E91-B8C3-1A1D3B80E21D.png
53930B24-68F4-468F-A87D-0CAB77EC21BF.png
A9C3CF25-700A-4FF8-9FF0-C8870368AE0A.png
9A042D36-0936-4128-BEB9-F41B72F156A7.png
Corey Walker, Brownsboro, Texas

User avatar

Corey Walker
Posts: 592
Joined: Sun Jan 06, 2019 11:46 am
First Name: Corey
Last Name: Walker
* REQUIRED* Type and Year of Model Ts owned: 1914 runabout, 1921 homemade truck, 1921 Speedster
Location: Brownsboro, TX
MTFCA Number: 51502
Board Member Since: 2007

Re: Dimensions of J&B 66 mirror

Post by Corey Walker » Sat Nov 07, 2020 11:14 pm

Sorry for the double post. It acted like it wasn’t going to let me post the first one, it said ”error” so I started over.
Corey Walker, Brownsboro, Texas

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Topic author
dykker5502
Posts: 410
Joined: Mon Jan 07, 2019 7:01 pm
First Name: Michael
Last Name: Deichmann
* REQUIRED* Type and Year of Model Ts owned: 1914 Touring, 1921 Roadster P/U, 1922 Fordor (danish custom body)
Location: Rågeleje, Denmark
MTFCA Number: 29116
Board Member Since: 2007

Re: Dimensions of J&B 66 mirror

Post by dykker5502 » Sun Nov 08, 2020 3:56 am

Thank you! Very thorough answer worth waiting for! Now the design team (that's also me) will go in action!
Ford Model T 1914 Touring
Ford Model T 1921 Roadster Pick-up
Ford Model T 1922 Fordor (danish build body)
ECCT, Strobospark, HCCT(Sold), Rebuilding coils

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