26-01-2019, 05:55 PM
(26-01-2019, 04:06 PM)Parazine Wrote: OK, here's the swinging arm:
Followed by the width:
Followed by the thickness:
The diameter of the fixing. The arm is pivoted off a bolt (it may have been a special bolt with a plain shoulder), which fits through the seat box.
There are two types of pin:
The cranked type is for the later seats, where the base fits down into the frame. The plain, un-cranked one is for the earlier seat, where the seat cushion sites on top of the frame with brackets to locate it. I don't know when the change was made; it's not documented anywhere and seats tended to get changed around. I think it was 1928, possibly with the changes made in the autumn of that year but I don't know for certain.
That is very helpful. Thanks so much.
One query; does the hole for the locking pin go right through the assembly? There appears to be a hole in the other underside as well, but it looks off centre ...or is it a shadow or parallax or what...I imagine the pin has to go through the seat frame/arm and seat mounting, or does it act as a peg rather than a through pin?