Improvements in Monkey Wrenches.
Year: 1899

page_text: Date of Application, 1st May, 1899-Accepted, 2nd June, 1899
COMPLETE SPECIFICATION.
Improvements in Monkey Wrenches.
I, JOHN STYNSBERG, of the Town of Biwabick, in the County of St. Louis, in
the State of Minnesota, United states of America, Machinist, 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:
My invention relates to improvements in monkey-wrenches; and the object of
my invention is to provide a monkey-wrench with a handle which may be readily
adjusted at different angles with reference to the jaws or mouth of the wrench, and
thus enable the wrench to reach and take hold of nuts located in corners and like
places of machinery.
This and other objects I attain by the novel construction and arrangement of
parts illustrated in the accompanying drawing, in which,-
Fig. 1 is a side view of my complete wrench, and
Fig. 2 is an upper edge view of Fig. 1.
Referring to the various parts in the drawing by letters of reference, A, desig-
nates the front portion of the handle of the wrench, which is bifurcated at B, and
into said bifurcation is pivoted on the bolt C, the rearwardly extending segmental
wing or tail D, of the jaw E, in which the screw-threaded bar F. of the adjustable
jaw G, slides and is guided not only by the oval hole H, in which it is inserted.
but also by having its rib I, inserted in the groove J, in the angular extension K,
of the jaw E. which extension gives great support to the jaw bar E, to prevent
its bending backward between the jaws, as is so often the case with common
wrenches when force is applied to them.
L. is a knurled thumb-nut placed in the aperture M, in the jaw E, and serow-
threaded upon the jaw bar F, so that the latter is moved back and forth by the turn-
ing of the nut.
In the side projection O, of the handle is a groove N, which when the handle
is adjusted at its limit as shown in dotted lines in Fig. 1, straddles the rear edge
of the jaw-bar, which is thereby sieadied and impelled in either direction by
turning the wrench up-side-down for tightening or loosening nuts bolts and other
objects.
Through the hole P in the handle and either one of the holes Q. in the segmental
tail 1, put the pin R. and thus lock the wrench and the handle at any desired
angle relatively to each other. This pin R. is held in place by having its head S,
met in front by the handle and in the rear by the latch T. which is pivotally
secured to, and held by the frictional contact with the handle. (preferably upon the
holt C.) and is provided with a notch U, which houses the head of the pin.
In operation the nut L is turned, the same as on other wrenches, until the mouth
of the wrench fits the nut or bolt-head it is to operate on, the latch T is then
swung one side in pin R, extracted enough to allow the handle to swing clear of
any obstructions to its operation: the pin R is then replaced into such a hole of
the tail D. as will allow the handle to move in using the wrench. If the motion of

page_text: the handle is very much limited by obstructions, the latch may be left open
and the pin moved from hole to hole during the operation.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed. I declare that what
1 claim is
In a monkey wrench, the combination of the primary jaw E, having the groove J,
angular arm K, the two intersceting apertures and M, and the segmental plate D.
provided with a segmental row of apertures : the secondary jaw G, having the
screw-threaded arm inserted in the aperture H. and the rib I guiding in the
groove, the milled nut L. inserted in the aperture M and engaging the arm F.
which extends beyond the primary jaw: the handle A, pivotally secured at the
centre of the plate D, and having a hole or aperture adapted to register with either
of the holes in the plate D, a headed pin adapted to be inserted up to its head in
the said registering holes, a friction-held latch pivoted to the handle and normally
covering the head of the pin; said handle having the side-arm 0, with the notch &
adapted when in normal position to guide and support the jaw-arm F, substantially
as shown and described and for the purpose set forth.
B: 901 1900
WM. P. THOMPSON & Co..
Of 6. Lord Street, Liverpool, Agents for the Applicant.