Improvements in Singletree and Doubletree Clevises.
Year: 1899

page_text: PROVISIONAL SPECIFICATION.
Improvements in Singletree and Doubletree Clevises.
I, GILBERT THORSEN, of Letcher, South Dakota, U.S.A., Carpenter, do hereby
declare the nature of this invention to be as follows:-
The object of this invention is to provide new and useful improvements in
clevises, such as are used in connection with singletrees and doubletrees, whereby
a more serviceable article of the kind is produced.
My improved clevis comprises a body consisting of a flat piece of metal of
convenient length and width and having longitudinal slots at both ends. A
pin, passing through apertures in the ears formed by one of the slots, retains
an L-shaped arm, having an elongated pivot-hole to pass over the pin, and
a stud projecting from its other end at an angle and formed with a notch or
hook at its end to engage one wall of the slot or opening at the other end of the
body when the arm is raised so that the stud projects through the opening:
A bracket extends upwardly from the body and has a similar arm and stud
to that aforedescribed pivoted in its upper part; the pivot-hole in the bracket
being elongated. A projection on the arm prevents it from being swung too far
back.
The elongated pivot-holes permit of the notch or hook on the studs engaging
over the edge of the openings in the body. A spring may be arranged in the
pivot holes to force the arm normally outwards.
P. R. J. WILLIS,
Agent for Applicant.
Improvements in Singletree and Doubletree Clevises.
I, GILBERT THORSEN, of Letcher, South Dakota; U.S.A., Carpenter, 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:-
The special object of this invention is to dispense with old styles of clevises
in which rings, loops, and loose pins, keys, or nuts were employed, and enable
the single or double tree to be placed on top of the evener, so as to work freely
from side to side without being caught in anything; also to connect all the parts
permanently together, so that none can be lost, mislaid, or become loose. For
this purpose I provide a double lock which is very easily manipulated, but cannot
be unlocked by accident.

page_text: Reference being had to the accompanying drawings, and to the letters of
reference marked thereon, which form a part of this specification:-
Figure 1 is a side elevation of the device shewing the pin-arms thrown back.
Fig. 2 shews the clevis closed; and Fig. 3 is a detail view of the stop.
In the drawings A. represents the body of the clevis, with the fixed projec
tion B, end slots 6, 1, and cross-pins 1, 3, while C, D, represent hinged arms
with pins c, d, at an angle thereto and having shoulders e, near their free
ends. The arms C, 1), have rear slots, d, which enable them to slide on the
cross pins, b, in order to free the pin shoulders c, d from engagament with
the body A.
E is a stop hinged on the pin 2 and provided with a slot e, within which works
the arm C. When this stop is raised, as shewn in Fig. 1 of the drawings,
the arm C can be slid back on its cross-pin 2, so as to allow the pin e to be
disengaged and taken out of the slot. This permits the arm D to be slid back
on its hinge-pin and be taken out of its body slot 1.
It will thus be readily perceived that I get a double lock on my clevis, which
makes it very secure, while the clevis can be opened or closed with great facility.
These clevises will be made of different sizes and perhaps slightly changed to
suit particular vehicles, but without departing from the principles of my inven-
tion.
Having now particularly described and ascertained the nature of my said in-
vention, and in what manner the same is to be performed, I declare that what
I claim is
single-or-double_tree_clexis_having_the_body_A with projection B, the
slots and cross-pins in combination with the two hinged arms C-1)
and hinged stop E, the arms being provided with the shouldered pins c and d,
at and angle thereto, all constructed and arranged substantially as shewn and
described.
Dotad this 2nd day of November 1899