I just bought a 1946 Delta drill press that came with an odd vise made by the Armstrong Bro Tool Co in Chicago. I found an image online that identifies the vise as the "Armstrong Quick Action Drill Vise."
So far as I can tell, large changes in jaw width must be done by loosening the two bottom screws and sliding the top portion into an approximate position. Then the bottom screws need to be tightened.
Fine adjustments then are done by turning the handle. It also seems that by pushing down on the handle the jaws can be even more firmly locked. However, the handle does not remain in the down position, so you would have to maintain the downward pressure. This does not seem to be very convenient.
Additionally, the drill press table is quite large and the clamping projections on the vise are pretty small. Is there a clamp that would have a depth deep enough to clamp this vise?
Does anyone know anything more about this vise, or this type, that would be helpful for me to know?
Thank you,
Richard