ClipArt ETC
"a. shank for fixing the implement to a bench; c. punch, hinged to a base b and e; and pressed upward by springs; h. screw-support for the back of the blade; d. gauge which may be adjusted for different-sized teeth. The blade is moved along to bring alternate teeth under the punch, which his struck with a hammer." —Whitney, 1889

Saw Set for a Work Bench

"a. shank for fixing the implement to a bench; c. punch, hinged to a base b and e; and pressed upward…