Nail-Puller. Page: 3 of 3
[1], 3 p. : ill. ; 23 cm.View a full description of this patent.
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643,512
claw forward against the nail or spike, and
thereby cause the claw to pull the nail or
spike more straight than is possible with the
other forms of pulls referred to.
5 It will be readily understood that in using
my form of implement the fulcrum-wheel,with
its bail 4, is moved back on the lever 1 to the
point desired.
Now assuming the claw to have been pressed
to under the nail or spike head (see Fig. 5) the
lever will rest upon the wheel 5 and not upon
the bail 4, the fulcrum-point of the lever at
this time being on the line indicated by X.
Now applying pressure to the end of the lever
15 will tend to rotate the fulcrum-wheel for-
wardly in the direction indicated by the ar-
row Y, which movement shifts the fulcrum-
point forwardly approximately on the line
indicated by Z, and in consequence corre-
20 spondingly moves the claw-head forward to
more firmly engage the spike or nail, such
change of position gradually continuing as
the nail or spike is pulled up until the wheel
has been turned sufficiently to cause the bail
25 4 to tightly grip down against the front edge
of the lever, after which the said wheel be-
conies a fixed fulcrum, it being obvious that
if desired to still operate the implement un-
der an automatic shifting fulcrum it will only
30 be necessary to elevate the outer end of the
lever slightly to permit the wheel and its bail
being pushed forward by the foot.
By providing a fulcrum such as described
the same can be quickly slid to the position
35 desired upon the lever and all strain upon
the bail that hauls it upon the lever is trans-
ferred directly to the fulcrum-wheel. Fur-
thermore, the leverage-power is automatic-ally increased after the fulcrum has been set
to the desired position. Again, as the claw 40
end is automatically pressed forward by the
rotary action of the wheel 5 a positive and
more powerful grip of the claws on the nail
or spike is effected and the danger of the
claw slipping from under the spike or nail 45
head is reduced to a minimum.
Having thus described my invention, what
I claim, and desire to secure by Letters Pat-
ent, is-
1. An im plenent for the purposes described, 50
comprising a claw - lever; a bail slidably
mounted upon the lever and a disk or wheel
eccentrically journaled on the bail and dis-
posed adjacent the rear edge of the lever.
2. The combination with the claw-lever; of 55
the bail open at the lower end, said end being
projected beyond the rear edge of the lever,
and a disk of' wheel eccentrically journaled
in the projected end of the bail, said disk or
wheel being disposed in a vertical plane with 6o
the lever.
3. A nail-puller, comprising a lever having
a claw at the lower end; a U -shaped bail
slidably hung on the lever, said bail having
its side members projected beyond the rear 65
edge of the lever; a pivot-pin supported in
the said ends of the bail at a point beyond
the rear edge of the lever; and a disk or wheel
eccentrically journaled upon the said pin, all
being arranged substantially as shown and 70
for the purposes described.
WILlIAM LOCKIlART LUBBOCK.
Witnesses:
A. S. BUSBY,
B. S. HANCOCK.n
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Lubbock, William Lochart. Nail-Puller., patent, February 13, 1900; [Washington D.C.]. (https://texashistory.unt.edu/ark:/67531/metapth513551/m1/3/: accessed July 18, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu.; crediting UNT Libraries Government Documents Department.