Automatic Wrench Page: 3 of 4
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UfIT A STATESPATENT OFFICE.
SAMUEL CLAY, OF GARWOOD, TEXAS.
AUTOMATIC WRENCH.Specification of Letters Patent.
Patented Jan.7,1913.
Application filed April 1, 1912. Serial No. 687,707.
To all whom it may concern:
Be it known that I, SAMUEL CLAY,.a citi-
zen of the United States, residing at Gar-
wood, in the 'county of Colorado, State of
5 Texas, have invented certain new and use-
ful Improvements in Automatic Wrenches;
and I do hereby declare the following to be
a full, clear, and exact description of the
invention, such as will enable others skilled
10 in the art to which it appertains to make
and use the same.
This invention relates to new and useful
improvements in automatic wrenches.
An object of this invention is the.provi-
15 sion of a wrench of such construction that,
the movable jaw can be locked in its ad-
justed positions, the. said jaw being of such.
construction that upon its release it will be
automatically moved to its extended posi--
20 tion away from the stationary jaw.
A further object of this invention is to im-
prove and simplify devices of this character,
rendering them comparatively simple and
inexpensive to manufacture, reliable and ef-
25 ficient in use and readily, operated.
. With the above and other objects in view,
this invention resides in'the novel features
of construction, fornations, combinations
and arrangements of parts to be herein-
30 ,after more fully described, claimed and
illustrated in the accompanying drawing, in
which
Figure 1 is a side elevation of my inven-
tii . j2 ' is a longitudinal sectional view
35 thereof, with the sliding jaw at its limit of
outward movement on the stock and .the
p)awl in locking engagement with the rack
bar. Fig. 3 is a transverse sectional. view
taken on the line 3-3 of Fig. 1, and Fig. 4
sa similar view taken on the line 4-4 of
Fig. 1. Fig. -5 is a longitudinal sectional
view showing-the sliding jw at its limit of
inward? movement on the stock with the
pawl releasedfrom the rack bar.
45 Referring to the accompanying drawing
by similar characters of reference through-
out the several views, the numeral 5 desig-
nates generally my improved wrench which
consists of the customary stock 6 which is
50 formed at one end with a stationary head 7
and at. intervals throughout its length with
perforations 8 for the reception of bolts 9
or other suitable fastening devices by means
of which the handIte 0 is- secured thereon
55 and held against displacement.
The handle 10 is substantially U-shaped incross section consisting of the customary legs
11 which engage the opposite sides of the
stock 6 and receive the fastening devices 9,
the said legs 11 being connected by an arch go
portion 12 which' extends ii, spaced rela-
tion from the adjacent edge of the stock 6
to produce a passage 13 in which is slid-
ably located an operating rack bar 14 to
one end of which is secured in any manner 65
the movable jaw 15 for movement to and
from the said stationary jaw 7 for coper-
ation therewith.
The inner edge of' the rack bar 14 is
formed with a plurality of teeth 16 for en- 70
gagement with the sharpened end 17 of a
pawl 18 pivoted intermediate its ends 'as at
19 to a finger 20 which projects. into' the
notch or pocket 21 formed in the bar 6 and
in which the said pawl 1 is located. 75
A spring pressed pin 22 engages the oper-
ating end of the pawl 18 and serves to nor-'
mally force the terminal 17 thereof into en-
gagement with theteeth 16, while bearing
against the opposite ends of the said pawl as 80
at 23 is an operating pin 24 which projects
through an opening formed in the stock 6.
It is provided with a head 25 by means of
which the said pin can be forced inward and
the terminal 17 disengaged from the 85
teeth 16.
A retractile spring 26 is attached to the
end of the handle 10 and to the adjacent
end of the rack bar 14 and serves to auto-
matically slide the jaw 15 to its extended po- 90
sition upon the release of the rack bar 14.
The jaw 15 is limited in such movement
by its contact. with. the adjacent end of the
handle 10 and the said jaw can be readily
moved to its retracted position against the 95
tension of the spring 26 by simply releasing
the pawl 18 and sliding the said jaw 15 in
the direction of the ja:w 7 to the desired po-
sition, in which it will be retained upon the
release of the pawl 18. 100
It should be understood in this connection
that various minor changes in the details of
construction can be resorted to within the
scope of the appended. claims. without de-
parting from or sacrificing any of the ad- 105
vantages -of the invention.
From the foregoing disclosure taken in
connection with the accompanying drawing,
it witU ': manifest that a wrench such as de-
s(rib)ed which will fulfil all of the necessary 110
requirements of such a device- is provided.
Having thus fully described this invention1 ,049,9 5..
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Clay, Samuel. Automatic Wrench, patent, January 7, 1913; [Washington D.C.]. (https://texashistory.unt.edu/ark:/67531/metapth511009/m1/3/: accessed April 24, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu; crediting UNT Libraries Government Documents Department.