Debs your question was about TP shutters which are rare in the US but very common here in the UK and copied in Europe.
They are way better than Packards and were made in a variety of sizes. and also higher speed versions. as well. Larger ones areless common but I have some to fit all my larger barrel lenses. They were still being made and serviced up until around 1960 even thought the Limited company ceased trading before WWII. A former employee continued making shutters and servicing TP cameras until finally retiring himself.
I've lost count of how many TP shutters I own but it's way over 50, morelikely 80 about half fully restored and maybe 30 just needing re-assembly with a new shutter curtain and cord.
There are many types of TP shutter from the Focal plane shutter backs, the silent Stdio shutters and then the more commom ones the Snapshot and the Time and Instant. The best are the Time and Instant preferably with a speed indicator. There are two verions Front mounting (the origibals) and the Between (or Behind) lens, the former push on to the front of a lens the later are screwd to the lens board and have removable front panels to allow the use of different lenses these were often sold with the camera and lens as a package but also sold seperately.
The largest TP shutters I own or have restores a have all been front mounting. Typically their shutters speed are 1/10 to 1/90 and usually use a pneumatic bulb release alas all long perished, I'm looking at getting some new bulbs made, TP sold a special valve for slower speeds and the shutter was set to T and the speed was controlled by how fast the air was released and the speed marked on the valves dial.
In later years TP shutter arms were tapped to take a cable release. I have a vague recollection that there was a slow speed clockwork controller that looked fairly similar to a self timer that screwed into a shutter release socket I remember thinking about getting one for my Zeit E while at school. They were definitely made before WWII by a few companies and fitted a cable release socket. A quick check and the most common were the Haka Autoknips made in Hamburg, the basic versions were just self timers but others had slow speed control of 1/2 to 9s, 10s.
Personally I'd look for a vavle release and use this with a modern pneumatic cable release, they tend to sell for more than I'd like to pay on Ebay
An alteranive would be a solenoid and timer to trigger and release a cable release. I do have two time kits but ahven't go around to putting them together, I have 3 solenoid controlled leaf shutters.
I keep meaning to make a video of my various shutter, I have a High speed TP Focal Plane shutter 1/10 to 1/100s, all my other TP shutters, various front mounting leaf shutters including a large Gitzo, an Eyelid, a Le Mignon (very rare), oh and two Packard/Dallmeyer. But you can guess from my reply that the TP shutters are my favorites and I find the most versatile.
This on fits the 20" Rapid Rectilinear lens on my 12"x10" filed camera.with a smaller shutter and CF card for comparison:
Ian
