At the 30 min mark, that "safety ratchet" is actually a click used to lock the starwheel when the carriage is returned left, in order to wind the mainspring. Or else the starwheel would rotate counter-clockwise. Daniel
The progression from cast/milled parts to stamped parts is typical in the progression of mechanical designs. The milled parts are more precise and more robust but the stamped parts are cheaper, lighter, and easier to assemble even if they aren't quite as robust. That doesn't mean they aren't adequate for the job, though. You notice how overbuilt that earlier machine is. Classic example. These changes also typically make them easier to service as well.
Too bad about cracking that lever, but I've had two (or is it three) Hammonds with one of those levers broken. I think the breakage happens when the shuttle becomes bound or sluggish and the typist pushes hard on the key to get it to move. The key levers have enough mechanical advantage to break the lever, which seems to be a casting. The takeaway for anyone who has gotten this far is not to force the keys when something binds. I haven't watched your next videos, hopefully you found an effective repair. Or is the JBWeld actually holding? That would be fantastic.
I did indeed get the J-B Weld to hold. The crack was rather due to my use of pliers in an attempt to bend the pin that was not engaging properly with the shuttle arm. I had at the time not found any other suitable way to adjust it without substantial disassembly.
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Part 2: ruclips.net/video/LTE712zEOPc/видео.html
Part 3: ruclips.net/video/4iysh1EMs6U/видео.html
At the 30 min mark, that "safety ratchet" is actually a click used to lock the starwheel when the carriage is returned left, in order to wind the mainspring. Or else the starwheel would rotate counter-clockwise.
Daniel
Really exceptional explanation. I'm going to link to this in a blog post on the Hammond Typewriter website.
Thank you! I could not figure out how to fold my keyboard back in after unfolding it. Appreciate the help!
The progression from cast/milled parts to stamped parts is typical in the progression of mechanical designs. The milled parts are more precise and more robust but the stamped parts are cheaper, lighter, and easier to assemble even if they aren't quite as robust. That doesn't mean they aren't adequate for the job, though. You notice how overbuilt that earlier machine is. Classic example. These changes also typically make them easier to service as well.
Very good thanks.
Nice vid.
Too bad about cracking that lever, but I've had two (or is it three) Hammonds with one of those levers broken. I think the breakage happens when the shuttle becomes bound or sluggish and the typist pushes hard on the key to get it to move. The key levers have enough mechanical advantage to break the lever, which seems to be a casting. The takeaway for anyone who has gotten this far is not to force the keys when something binds. I haven't watched your next videos, hopefully you found an effective repair. Or is the JBWeld actually holding? That would be fantastic.
I did indeed get the J-B Weld to hold. The crack was rather due to my use of pliers in an attempt to bend the pin that was not engaging properly with the shuttle arm. I had at the time not found any other suitable way to adjust it without substantial disassembly.