Wrench. Page: 2 of 3
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UNITED STATES PATENT OFFICE.
EDGAR C. ROLLINS, OF HARVEY, TEXAS.
WRENCH.
SPECIFICATION forming part of Letters Patent No. 638,474, dated December 5, 1899.
Application filed May 20, 1899, Serial No. 717,659. (No model.)To all whom it mnay coneerm:
Be it known that I, EDGAR C. ROLLINS, a
citizen of the United States, residing at Har-
vey, in the county of Brazos and State of
5 Texas, have invented new and useful Im-
provements in Wrenches, of which the fol-
lowing is a specification.
This invention relates to certain new and
useful improvements in wrenches of the slid-
I ing-jaw type, the object being to provide a
wrench in which the sliding or movable jaw
is fulcrumed upon the shank of the station-
ary jaw and movable thereon to and from the
stationary jaw in such a manner that the
x5 movable jaw moves in the are of a circle with
respect to the fixed jaw, so as to clamp a nut
or other object which is placed between said
jaws and at the same time permit the jaws to
be readily separated or held in a fixed posi-
20 tion; and with the above ends in view my in-
vention consists in the combination, with the
fixed jaw of a wrench, its shank, and handle,
of a movable jaw which is provided with a
pawl for engagement with ratchets in the
25 back of the shank of the fixed jaw, the shank
of the movable jaw being serrated, together
with means for holding the shanks in engage-
ment with each other, as will be hereinafter
set forth, and specifically pointed out in the
30 claims.
In the accompanying drawings, which illus-
trate my invention, Figure 1 is a perspective
view; Fig. 2, a plan view; and Fig. 3, a side
elevation, partly in section.
35 A refers to a bar upon which is formed the
fixed jaw A', the same being preferably curved
and provided with serrations. The shank A2
of the bar is provided on its back with a se-
ries of ratchets a, and beyond the ratchets
40 there is provided a yoke A3, which is rigidly
attached to one side of the bar A and extends
outward therefrom and then parallel with the
flat bar A, its end being on a line with a lug
a', which projects from the opposite side of
45 the bar, and between the members of the yoke
is pivoted a cam or thumb-latch B, one of the
faces thereof being serrated for engagement
with the serrated portion a' of the bar A. The
yoke carries between the pivot of the cam B
5o and its inwardly-bent end a thumb-screw b.
C refers to a bar upon which is formed the
movable jaw C', and the portion opposite saidjaw is apertured for the passage therethrough
of the shank A2 of the bar A and opposite
the serrated portions of the jaw C' has a pawl 55
c,which is adapted to engage with the ratchet-
teeth a or slide over said ratchet-teeth when
the wall of the aperture contacts with the
smooth side of the shank A2. It may be here
noted that the shank A2slightly increases in 6o
width from its fixed jaw toward the handle,
so that the length of the serrated portion will
limit the movement of the movable jaw there-
on. The pawl and ratchets serve as a ful-
crum for the movable jaw, and when the 65
shank C is raised or moved so that the end
of the movable jaw will be moved from the
fixed jaw, the movable jaw may be then slid
upon the shank; but when an opposite move-
inent is imparted to the movable jaw the 70
pawl will be brought against one of the
straight walls of the ratchet and the jaw will
be moved toward the fixed jaw, so as to se-
curely clamp and hold a nut or other object
which may be passed between-the jaws, thus 75
securely clamping a nut, so that it will be held
by the implement when removed from a bolt.
In order to hold the shank of the movable
jaw in a locked position, the cam or thumb-
latch may be manipulated so as to bring its 8o
serrated and curved face in engagement with
the serrated portion a2 of the shank C. In
order to provide means for limiting the piv-
oted movement of the movable jaw with re-
lation to the bar A, the bar or shank C has 85
its outer face inclined or beveled, as shown
at D, and by adjusting the set-screw b the
movement of the bar C toward the angular
or bent end of the yoke may be determined.
The implement may not only be used as a 90
nut-wrench, but may also be used for other
purposes, as a pipe wrench or tongs.
I claim-
1. In a wrench,the combination with a shank
having a serrated back and a jaw fixedly at- 95
tached to the end of the shank the width of
the shank' increasing as it recedes from the
fixed jaw, in combination with a shank hav-
ing a fixed jaw with an aperture therethrough
which shank and jaw are adapted for longi- roD
tudinal movement upon the shank of the
fixed jaw, the movable jaw having a pawl for
engagements with the ratchets said pawl and
ratchets serving as a fulcrum upon which the
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Rollins, Edgar C. Wrench., patent, December 5, 1899; [Washington D.C.]. (https://texashistory.unt.edu/ark:/67531/metapth513862/m1/2/: accessed July 18, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu.; crediting UNT Libraries Government Documents Department.