Thanks Don, a coupling similar to unmarked couplings often fitted to trailers, often only 1 7/8''..but we have seen other 2 1/4'' couplings the same made by other makers. If yours also has a load rating on it that makes it entirely legal to use, if it doesn't that can be easily fixed
I'm sure if you google "caravan master cylinders" you will find plenty of new units available, & cheaper than rebuilding yours They may be a little different in spots, but as they are a simple item, it won't be hard to fit one that's slightly different.
My comment at the time the photos were posted was ...... Post by cobber on 22 Mar 2016 at 10:55am
G'day pimpdog, & Don R
Thank you for the nice photos of the 'silent coupling' fitted to this mystery van. My initial impression is that it was designed for agricultural use in 1932, and a few googles confirm there was a J. Todd & Son in Adelaide from 1927, at least, engaged in general engineering and Blacksmith work.
Coincidently there is even a 1927 brochure on ebuy at the moment for Todson Bumper Bars.
I reckon it was developed for use on the pig food trailer so you don't wake the neighbours early in the morning I wouldn't like your chances of getting it approved for use on a caravan, it breaks just about every requirement there is for a caravan coupling. Sorry that info doesn't help with identification or age or.... anything much Cobber.
This tow coupling is fitted to Angies 1940s teardrop[/url] It appears to be designed to fit on a timber drawbar, or an iron one ? [/a]
There are no markings on it but after a bit of research it appears to be an American "Marvel Flip Latch coupling " and is still available over there, as are replacement parts for it. You can google it if you would like to know more, if you can find out when it was first available that would be interesting 😉
One of its features is that when the latch is vertical the tongue drops down so that it fits easily over the tow ball. The above photos provided by Angie after a clean up, (of the coupling )
The next photo was taken was by me before a clean up, (of the coupling )
It raises interesting questions regarding the origins of the teardrop.
Roybeth has recently posted a couple of advertisements for vintage caravans that included a small illustration of a coupling to attach the caravans, or more likely the smaller trailers, to the bumper bar of the towing vehicle. This is one of the advertisements posted by Roybeth, thanks for sharing those with us Roybeth
This, I think, is the patent application for the coupling by 'Lightburn & Co. Limited' in 1948. They do state that the coupling can be attached to the towed vehicle by means of a ball and socket arrangement. These are the drawings submitted with the application.
This is the coupling and tow ball for my Safetee Sports Minor Caravanette it is original as stated in the promotion pamphlet. The tow ball, which I think is a 1 7/8 size, is rather unique and looks like a squashed ball, it does not appear to be round. Have no idea where I would ever get a replacement ball if this one gets broken. Massey by Katrina Parr, on Flickr