Rear Brake plate, rigid - what do I have?

[camstevens]

Hi All
I've gone through the parts drawings/photos, and can't seem to place this plate. It came with a disassembled 1935 4F project, but doesn't seem to be represented in any drawings. Confusingly the brake shoes utilise the correct wedge holder/adjuster type configuration, but the plate just has a plain fulcrum.

The plate does, however fit. As far as I can see i need to;
- to source a different plate
- procure a different shoe type (if available)
- possibly retro fit a wedge holder unit to this plate?

Campbell

[tony.barnett]

The radial slot is for a bike with the brake anchor on the frame, not like the later 30s bikes which has an anchor arm. Not sure which years the radial slot were, but my 28 is like that. Your brake shoes are for the later type of brake with the fulcrum adjuster. the earlier ones had the plain ends, not slotted like these.

[camstevens]

The radial slot is for a bike with the brake anchor on the frame, not like the later 30s bikes which has an anchor arm. Not sure which years the radial slot were, but my 28 is like that. Your brake shoes are for the later type of brake with the fulcrum adjuster. the earlier ones had the plain ends, not slotted like these.

Thanks Tony
My 1935 frame certainly has the slot (not stay), and the plate I have could feasibly be used with the correct hub/drum I have. To find the correct back plate appears to be a mission. Would it be feasible to retro fit the plate with a wedge unit, in order to achieve better adjustment, as I do have the correct shoes?

Regards
Campbell

[simon.holyfield]

The radial slot is for a bike with the brake anchor on the frame, not like the later 30s bikes which has an anchor arm. Not sure which years the radial slot were, but my 28 is like that. Your brake shoes are for the later type of brake with the fulcrum adjuster. the earlier ones had the plain ends, not slotted like these.

Cam, following what Tony said, my 1930 rear brake is just like that.

Draganfly's 'List 15' has a good description of the changes to what they call the 'Type 5' wheel, of which this is an example.

[tony.barnett]

The radial slot is for a bike with the brake anchor on the frame, not like the later 30s bikes which has an anchor arm. Not sure which years the radial slot were, but my 28 is like that. Your brake shoes are for the later type of brake with the fulcrum adjuster. the earlier ones had the plain ends, not slotted like these.

Thanks Tony
My 1935 frame certainly has the slot (not stay), and the plate I have could feasibly be used with the correct hub/drum I have. To find the correct back plate appears to be a mission. Would it be feasible to retro fit the plate with a wedge unit, in order to achieve better adjustment, as I do have the correct shoes?

Regards
Campbell

It'd be worth measuring up, but I'd think it might be short on space to fit the wedge unit.

[Pete.Silson]

Cam,
I think you have a brake plate from a pre-1931 single. The angle between the frame lug slot and the centreline of the brakes (piccy 1) on your plate is much narrower than that on a 4F.

The 1935 4f has a much wider angle (piccy 2)

As always, I am happy to be corrected by those in the know.

Pete

[camstevens]

Hi
I'm sure you're all correct on the age/machine, so it would be a shame to butcher it as no doubt someone out there would like it. Best I go on the hunt for the correct plate! To back up the suggested age/model, I also have a 1920's / early 30's front mudguard, which is also no use to my project, but likely from the same donor bike.

If anyone out there wants the plate, please PM me

Cam

[simon.holyfield]

Hi
I'm sure you're all correct on the age/machine, so it would be a shame to butcher it as no doubt someone out there would like it. Best I go on the hunt for the correct plate! To back up the suggested age/model, I also have a 1920's / early 30's front mudguard, which is also no use to my project, but likely from the same donor bike.

If anyone out there wants the plate, please PM me

Cam

If you get stuck I'm sure it wouldn't be too difficult to get someone to make a plate? The ring around the edge is available from the Slovak club.

[Roger Gwynn]

The dust cover was added in 1930, I cannot see if you have a hole for the end of a return spring that was added in 1931 but the change to the angle, that Pete mentions, took place at the same time, in 1931. 1932-35 had a fulcrum riveted in place and in 1936 the torque arrangement changed from a slot to a separate bar. So your plate should be 1930. You need a 4360-34 or 4360-32, the difference is chrome or black dust rim.
As always, you could try Draganfly https://draganfly.co.uk/shop/275799/bra ... /#4360-32U Or I can get Draganfly to make you a complete new one less the dust cover, as I have drawn all the brake plates when we made all the fronts but never got around to making the rears.
If you prefer I can get one laser cut for you with holes to use the later bolt on fulcrum adjuster and you can make or buy the other fittings to weld on yourself.