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.

 

Bicycle catalog 1957

2. Lens Size
Along with the bullet shape, the predominant lens sizes are less than 2" 7/8 (73mm).

2" 3/4 inch (approx. 70mm)

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

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

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

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


Single flange

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