Don, the tackhammers were only in the 1903 catalog, in the back. They had two versions, one was just magnetic to hold a single tack and the other has a magazine and a trigger you pulled to swing the magnet to grab another tack. He worked on the magazine version for awhile, He had at least two patents.
.uspto.gov/.piw?Docid=00599741
uspto.gov/.piw?Docid=00653890

As long as I'm linked into the USPO site, these are really for the thread on washing machines -
uspto.gov/.piw?Docid=01714107
Note the discharge pump shown in the patents, an instruction manual I have for washing machines also shows a pump, my washer doesn't have that.
uspto.gov/.piw?Docid=01766227
here's one without the pump - uspto.gov/.piw?Docid=01842154
one that's more 'modern' - uspto.gov/.piw?Docid=01850821
uspto.gov/.piw?Docid=2122744

Gene