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2023年1月 7日 (土)

Front Headlamp (Headlight) Part 4

次回、この記事の日本語版を投稿します。

In Part 1 of this series Front Headlamp (Headlight) we began looking at vintage Japanese bicycle headlamps, and, examined the various mounting locations and hardware (brackets) in Part 2.  In Part 3, we examined the three features that, when all are present, typically signify the headlamp is mid-1950s or older. In this post, Part 4, we will look at the features that signify the headlamp may be mid-1950s or younger.

1. Bullet Shape
From 1956 onward the predominant style in the model lineup is the bullet shape.
Img_5335
Img_5334  

Bicycle catalog 1957
Img_2950

2. Lens Size
Along with the bullet shape, the predominant lens sizes are less than 2" 7/8 (73mm).
Img_5337
2" 3/4 inch (approx. 70mm)
Img_5338

3. Front cover 
⓵ Hinged
The front cover is hinged. 
Img_5345
Img_5347

⓶Front cover typically opens with either a push button, or, tiny screw located on the side. 
Img_5340
Img_5341
Img_5343

③ The lightbulb socket fits inside the reflector in the front cover.
Img_5344

4. Clamp Joint
The clamp joint at the base of the headlamp has no spacer and is commonly a single flange.
No spacer
Img_5348

Single flange
Img_5349

In the next installment in this headlamp series, we will take a look at some interesting headlamp designs. 

 

 

 

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