I have dismantled several old typewriters and they contain a wealth of parts. The wonderment of seeing how these machines were made at that level is a trip back to that time. It takes me 2 or 3 hours to dismantle one.
Most recently I used cam arms from key linkages as clips for holding mirror to a medicine cabinet.
I used one of the rack gears for setting margins as a tensioning control on a steel cable connected to a latch.
I use the pointers on the ruler, I think off a similar Remington as pictured, as pointers on tools such as my finger joint cutting jig. Makes perfect alignments.
The bells on these provide a distinct sound that many people recognize and seem to like. So adding some sound to items is sometimes fun.
All the bolts and brackets can of course be used in the making of any project.
There's a retractable device with a cloth strap to pull the carriage that is useful on moving parts. Has a nice feel.
Ball bearings out of the carriage make excellent latches. I used one as a replacement on my power miter saw. The one that came with the saw made changing the angle very difficult and the slightly smaller bearing makes the saw a joy to use now.
Once you get the frame gutted I find a use comes easier to mind for that.
A interesting finish can be had on many of the black painted parts. Of the typewriters I've dismantled these parts are copper plated steel and then painted. If you are really careful the paint can be removed to reveal that copper plate. Very thin. I assume it is actually some copper alloy, but seems to have a lot of copper.
I have not run into any hardened steel so all can be easily bent into needed shapes within the limits of mild steel. Except of course the frame which is cast iron.
I suggest oiling all parts after removal. For some reason these some rust after 100 years and then a week after dismantling they tend to rust on me.
Using the right screw driver really helps. I had to grind my own to get a good fit. Out of maybe 10 machines I've had only one bolt I could not remove and none ever stripped the head. Just amazing workmanship.
Uses are really endless.