Carpenter's Tool. Page: 4 of 5
[2], 3 p. : ill. ; 23 cm.View a full description of this patent.
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1,294,289
that when the arm 22 has been adjusted to
the desired position, the thumb screw is ro-
tated in the proper direction to maintain the
arm against further adjustment, the thumb.
5 screw 20 and nut 23 cooperating for this
purpose as will be readily understood. Of
course, as the nut 23 is associated with the
thumb screw 20, these parts slide within
the slot 18 as a unit, but by reason of the
10 fact that the nut is fitted between the op-
posed walls of the groove 19, turning of the
nut with the thumb screw is obviated.
The arms 22 are connected with their re-
spective sections through the instrumental-
15 ity of links 24 and 25, these links project-
ing from the opposite sides of each arm and
embracing the adjacent end of its respective
section, the links being associated with the
latter by means of a threaded bolt 26 which
20 passes through said section, and the slots
of the links 24 and 25, a nut 27 being asso-
ciated with the bolt to prevent casual separa-
tion of the latter from said section. This
construction and arrangement manifestly
25 provides for the swinging of the arms 22
toward and away from each other to assume
different angular positions with respect to
their associated section, each arm and the
adjacent section being beveled as shown to
30 also permit of the adjustment of said arm in
the manner stated.
The link 24 of each arm is slightly longer
than the link 25 thereof, and passing through
the slot in the link 24 in addition to the bolt
35 26 is a bolt 28. The additional length of
the link 24 is necessitated by the provision
of this bolt in order that the slot in the link
24 will extend beyond the bolt 28 as far as
the slot in the link 25 extends beyond the
40 bolt 26. The bolt 28 is received within an
arcuate shaped groove 29 formed in each
section 10 and 11, while positioned within
each groove 29 is the head 30 of the bolt 28.
A nut is threaded upon the bolt 28 to assist
45 in holding the arm 22 in a folded-position
when use of the device is not desired. By
reason of the provision of the slot 29, cou-
pled with -th-fact that the outer ends of the
respective sections are beveled, it is manifest
5o that by loosening the bolt 28, the arms 22
can be swung inwardly and arranged against
one edge of its respective section-in parallel-
ism therewith. During this adjustment of
the arm, the bolt 28 is moved toward one end
55 of the groove 29, and subsequent to the fold-
ing of the arms in the manner shown in Fig.
5, the nuts on the bolts 28 are tightened, to
hold the arms fixed in their folded position.
In this manner a very compact device may
6o be produced to occupy but a minimum of
space in a tool box or the like.
In practice, the bar A is arranged within
the space to receive the said tread or riser,
with a view to determining the size and con-figuration necessary for the tread or riser to 65
be made to fit the space. The section of the
bar can be readily and quickly adjusted to
vary-the- length of the bar' as a unit, and the
sections held fixed relatively in their ad-
justed position by tightening the thumb 70
screws 17. The. arm 22 can then be inde-
pendently adjusted to accommodate them-
selves to a variety of angles at either end,
and the arms maintained in their adjusted
positions by tightening the thumb screws 20. 75
The device can then be removed and laid
upon a board or other material, whereby the
said board or material may be properly
marked off to indicate the lines upon which
the material must be cut 'in the production 80
of the tread or riser. It is of course to be
understood that the device is adapted for
use in various capacities for the marking off
of material for the production of articles of
different characters, such as base boards, 85
shelving or the like.
While it is believed that from the fore-
going description the nature and advantages
of the invention will be readily apparent; I
desire to have it understood that what is 90
herein shown and described constitutes the
preferred embodiment of the invention to
which I do not limit myself, and that such
changes may be resorted to when desired as
fall within the scope of what is claimed. 95
What is claimed is:-
1. A device of the character described
comprising a bar, a pair of links piv-
otally and slidably connected with each of
the ends of said bar, an arm pivotally con- 100
nected between each pair of links, and a
brace pivotally connected with each arm and
slidably and pivotally connected-with said
bar.
2. A device of the character described 105
comprising a bar made up of a plurality 'of
relatively slidable sections to vary the length
of the bar, means for holding said sections
fixed relatively in their adjusted position,'
arms connected with the opposite ends of 110
the bar to assume different angular positions -
with respect thereto, a brace pivoted upon
each arm and longitudinally and slidably
adjustable in relation to the adjacent -,sec-
tion of the bar, and means for preventing 115
movement of the brace with respect to said
section whereby said arm -is held fixed in
adjusted position.
3. A device of the character -described
comprising a bar, having its ends cut' at an 120
incline to its length, a pair of links slidably
and pivotally connected with each end of
said bar, an arm pivotally connected be-
tween each pair of links, and a brace pivot-
ally connected with each arm and slidably 125
connected with said bar, the end of said arm
adjacent said bar being cut at an inclination
to its length to cooperatively engage with
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Reference the current page of this Patent.
McDermett, Jim E. Carpenter's Tool., patent, February 11, 1919; [Washington D.C.]. (https://texashistory.unt.edu/ark:/67531/metapth1257686/m1/4/: accessed July 18, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu.; crediting UNT Libraries Government Documents Department.