With regard to the difference in the chuck sizes I have a couple of thoughts: First, according to the information in Joe Ward's book and starting in 1923 North Bros. began a concerted effort to upgrade their tool line. It began with a significant change to the No.30, 31, 130 and 131 screwdrivers, available in January 1924. Other tools followed, but without any published timetable that I am aware of, and any with the "A" suffix were improved versions, actually made stronger than the originals. One of the modified tools obviously was the 1431A drill. I suspect that the chuck was modified, thus the increase in size. Also, if it was done in the late 1930's the call for a 1431 that would need to fit in a 106 Radio set box may have passed. Or possibly, since there is documentation that some tools were made in both versions at the same time, if they needed 1431,s they just made them. Lots of supposition here but probable I think.
Dave
--Previous Message--
: Sorry Dave:
:
: I didn't explain that very well - the photo
: is on the web page I posted the link too
: .....
:
: http://jp29.org/wwyankee1431.htm
:
: ..... but I will post it here anyway:
:
:
:
: As a point of interest - and further
: information - I own three 1431A hand drills
: (including the one on the counter display I
: bought from Joe Ward), all have the long
: chucks and will not fit into 106 box. I own
: three 1431 hand drills - all have the short
: chucks and readily fit in the 106 box.
:
: James
:
:
:
: --Previous Message--
:
: James, I'm not seeing the photo. - Dave
: --Previous Message--
: Dave - feedback on the following please.
:
: Thanks,
:
: James
:
: The No. 1431 chuck (right) is stamped in
: three lines:
:
: "YANKEE"
: NORTH BROS. MFG. CO.
: PHILA. PA. USA PAT. MAR. 15. 10
:
: The No. 1431A chuck (left) is .25"
: longer than the No. 1431 chuck
: and is stamped in two lines:
:
: "YANKEE"
: NORTH BROS. MFG. CO.
:
: The No. 1431A hand drill with the longer
: chuck is 9.75" in length and
: will not fit into the No. 106 Tool Set box
: which has a 9.50" opening.
:
: Please visit:
: http://jp29.org/wwyankee1431.htm
:
:
:
:
:
:
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