Improvements in Combined Try and Bevel Squares.
Year: 1895

page_text: Date of Application, 8th Oct., 1895-Accepted, 23rd Nov., 1895
COMPLETE SPECIFICATION.
Improvements in Combined Try and Bevel Squares.
I, JAMES EUGENE DUNCAN, of Centralia, in the County of Wood, and State of
Wisconsin, United States of America, Gentleman, do hereby declare the nature
of this invention and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement:-
This invention relates to an improvement in conbined try and bevel squares and
has for its object to provide a simple, inexpensive and durable construction of
square which shall be capable of being adjusted to any angle and so held. A
further object of the invention is to construct the blade of the square in such
manner that it shall comprise a long arm and a short arm, either one of which may
be utilized in laying off angles and whereby the long arm may be adjusted at
either an acute or obtuse angle or any desired angle with relation to the handle or
Lead of the square. Other objects and advantages of the invention will appear in
the subjoined description.
The invention consists in certain novel features and details of construction and
arrangement of parts as hereinafter fully described, illustrated in the drawings, and
finally embodied in the claims.
In the accompanying drawings:
:-
Figure 1 is a perspective view of a combined try and bevel square constructed
in accordance with this invention.
Figure 2 is a side elevation of the same showing the long arm or blade at an
acute angle to the head or handle, with a graduated scale upon the short arm or
blade thereof.
Figure 3 is a similar view of the opposite side of the square showing the long
arm or blade at an obtuse angle to the handle or head and showing also an
additional degree scale upon the opposite face of the short arm or blade.
1
Figure is a side view of the blade showing the notch and elongatel slot in the
short arm thereof.
Similar numerals of reference desiguate corresponding parts in the several
figures of the drawings.
Referring to the accompanying drawings 1, designates a suitable handle which is
made preferably of wood and faced upon opposite side edges with metal wearing
plates 2, in the usual manner. The handle or head, 1, together with the metal
face plates upon its edges is provided for a greater portion of its length with a
broad slit 3, extending entirely through from edge to edge of the head or handle
and also through the face or wear plates 2, as shown.
4 designates the blade of the square which comprises a long and a short arm.
The long arm may be made of any desired length and width, the thickness of said
arm and the short arm as well corresponding approximately to the width of the
slit 3, in the head or handle. The short arm of the blade is approximately half
the length of the long arm, although it will be apparent that this may be decreased
or diminished as round most expedient or desirable and works within the slit 3 in
the head or handle. The extremity or outer edge of the short arm of the blade is
tormed with a notch 5, centrally of said edge, and the latter is curved in the arc of
a cele struck upon the pivotal center of the blade. represents a transverse pin
or stun which passes through the handle or head and is adapted to engage the
notch 3, in the short arm of the blade when under the proper adjustment.
At or
near its inner end or that end adjacent to the junction of the short arm with the

page_text: long arm of the blade, the short arm is provided with an elongated slot 7, extending
in alignment with the pin or stud 6, said slot operating upon a headed pin or bolt
passing through the head or handle 1, and having the end of its shank screw
threaded to receive a thumb or winged nut 9. The winged nut is formed with a
hub extension 10, which is adapted to fit within a corresponding socket in the
handle or head 1, and against a shoulder whereby when said nut is turned inward
it will bind the handle or head against and upon the blade of the square for
preventing relative movement between the parts.
From the foregoing description it will be apparent that by loosening the nut 9
on account of the provision of the slot 7 the short arm or the notch therein may be
moved out of engagement with the transverse pin or stud which will allow either
the long or the short arm of the blade to be adjusted to any desired angle with
relation to the handle or head. The short arm of the blade is provided upon both
faces with degree scales, the scale upon one side being adapted to indicate the
angle of the square with relation to the head, by bringing the same into alignment
with the outer edge of the handle, as shown in Figure 2, while the scale upon the
opposite side of the short arm is adapted to register with the inner edge of the
handle as shown in Fig. 3. The lines which compose these scales and indicate
the several angles extend practically the whole length of the short arm, and it will
be apparent that considerable wear will be required to efface them.
It will also be apparent that by reason of the pin or stud 5 and the headed pin
or bolt 8 being located such a considerable distance apart an unusual degree of
strength is imparted to the connection between the blade and handle, and the blade
held accurately in the desired position, or at a right angle to said head or handle.
By means of the construction described it will be seen that the long arm of the
blade may be swung more than three-quarters of a circle around its pivotal pin,
thereby imparting to this square a decided advantage over articles of a similar
nature, as heretofore constructed.
It will be seen also, that either the long or the short arm may be used for laying
off angles, and the adaptability of the short arm for use as well as the long arm
whereby the device, while being used as a bevel square may be used in
circumscribed places, renders the article a very valuable and efficient one.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
A combined try and hevel square comprising a suitable handle or head provided
with a central slit a transverse pin or stud passing through said head or handle and
extending through the lit therein, a pivotal hiie having long notunda Short
arm, the short arm having a notch therein for engaging said transverse pin or stud,
an elongated slot formed in said blade adjacent to the elbow therein, and a headed
pin or bult ping through the handle and engaging seal lot and receiving n
winged nut, all arranged for joint operation, substantially as specified.
Dated this 8th day of October 1895.
BOULT & WADE,
Agents for the Applicant.