Year: 1899

page_text: Date of Application, 26th Apr., 1899
Complete Specification Left, 26th Jan., 1900-Accepted, 3rd Mar., 1900
We, WILLIAM VALENTINE CHISHOLM, Farmer, of Ashdale, ROBERT DICKSON
KIRK, Merchant, and WILLIAM CHISHOLM, Barrister both of Antigonish, and
all of the County of Antigonish and Province of Nova Scotia, Canada, do hereby
declare the nature of this invention to be as follows:-
This invention relates to certain new and useful improvements in wrenches;
the object of the invention being to provide means whereby the movable jaw of
the wrench can be expeditiously set and adjusted to a nut, and further, to pro-
vide a wrench of the kind possessing but few parts which are not likely to get
out of order.
A wrench constructed in accordance with our improvements comprises the
usual handle from which a shank projects upwardly and is formed at its upper
end with a fixed head. The shank is slotted longitudinally; a rod being
revolubly mounted between the ends of the slot. The upper part of the rod is
screw-threaded with an ordinary square thread, whilst the lower part is formed
with a spiral groove or worm. The screw-thread engages a nut fitted in the body
of the movable jaw arranged on the shank, and the worm engages a nut reciprocable
on the lower part of the shank.
When the lastmentioned nut is reciprocated by the hand of the operator, the
rod is revolved and the movable jaw is raised or lowered by the thread at the
upper end of the rod working in the nut of said jaw.
In an alternative form, the movable jaw has a depending rack, which is engaged
by a worm rotatably mounted in the upper part of the handle, and secured to the
upper end of a spirally grooved rod journalled in a longitudinal slot in the
handle, and fitted with a reciprocable nut.
ለሰ
.
1000
P. R. J. WILLIS,
Agent for Applicants.
We, WILLIAM VALENTINE CHISHOLM, Farmer, of Ashdale, ROBERT DICKSON
KIKK, Merchant, and WILLIAM CHISHOLM, Barrister both of Antigonish, and
all of the County of Antigonish and Province of Nova Scotia, Canada, do hereby
declare the nature of this invention and in what manner the same is to be per-
formed, to be particularly described and ascertained in and by the following
statement:-
This invention relates to certain new and useful improvements in wrenches;
the object of the invention being to provide means whereby the movable jaw of
the wrench can be expeditiously set and adjusted to a nut, and further, to pro-
vide a wrench of the kind possessing but few parts which are not likely to get
out of order.

page_text: Reference being had to the drawings hereunto attached:-Fig. 1 is a side
elevation of my improved wrench; Fig. 2 is a back view thereof; and Fig. 3
is a section taken on the line of Fig. 1. Fig. 4 is a side elevation of an
alternative form of the invention, and Fig. 5 is a section taken on the line y y
thereof.
A wrench constructed as shown in Figs. 1 to 3 comprises the shank 1 having
the usual fixed head 2 and movable jaw 3. A longitudinal slot 4 accommodates
the rod 5 which is pivoted at one end at 6 and at its other end in a screw-stud 7
threaded into the end of the shank. The upper end of the rod has an ordinary
square thread 8 and its lower part is spirally grooved or threaded as shewn at 9.
The screw-thread 8 engages a nut 10, reciprocable in the slot 4, and secured in
the movable jaw 3 by a set-screw 11. When the shank 1 forms the handle of the
wrench a nut, which is capable of being manipulated by the finger and thumb of
the operator, is fitted over the spirally-grooved part 9 and is reciprocable in the
slot 4. The nut is, however, preferably secured in the upper part of a handle 12
by a set screw 13. The handle is slidable on the shank, its outward travel being
limited by a stop 14 on the rod 5.
When a nut is to be manipulated the head 2 is placed over it, as indicated in
Fig. 1, and the handle is grasped by the operator who slightly pulls it, thus caus-
ing the nut in the handle to revolve the rod 5. Inasmuch as the screw-thread 8
is cut in an opposite direction to the spiral thread 9 the nut 10 will rise and carry
the jaw 3 against the nut to be manipulated.
In that form of the wrench shewn in Figs. 4 and 5, the rod 5 is not provided
with the threaded part 8, but its spirally grooved portion 9 is pivoted and journalled
in the lower and upper ends of the handle 15 which is longitudinally slotted to
receive the rod. The upper end of the rod is formed or fitted with a worm 16
contained within a recess 17 and adapted to engage a rack 18 depending from
the movable jaw 3. A nut 19 is reciprocably fitted in the slot of the handle and
engages over the threads 9 of the rod 5.
When the nut is reciprocated, the rod and worm rotate and raise or lower the
rack and jaw as desired.
な
Having now particluarly described and ascertained the nature of our said
invention, and in what manner the same is to be performed, we declare that what
we claim is:
1. A wrench comprising a longitudinally slotted shank having a fixed head,
a jaw slidable on said shank, a nut secured in said jaw, a handle slidable upon
the aforesaid shank and having a nut secured therein, a spirally grooved rod
longitudinally journalled in the slot of the shank and having its upper portion
screw-threaded to engage the nut in the slidable jaw, its spirally grooved portion
adapted to engage the nut in the handle, and a stop carried by the rod to limit the
outward movement of the handle upon the shank, all substantially as described,
illustrated in the drawings, and for the purposes hereinbefore set forth.
2. In a wrench comprising a shank having a fixed head, a jaw slidable on the
shank and a handle attached to or forming part of said shank; the rack depending
from said slidable jaw and extending through the upper part of the handle into a
longitudinal slot therein; a spirally-grooved rod journalled in said slot; a
reciprocable nut carried by said rod, and a worm also carried by said rod and
adapted to engage the rack, substantially as described, illustrated in the drawings,
and for the purposes herein before set forth.
11 th law of Januar 1000
P. R. J. WILLIS,
Agent for Applicants.