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Патент USA US3074181

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Jan. 22, 1963
H. B. CRAWFORD
3,074,171
scmme TOOL FOR TIMBER
Filed May 17, 1960
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By
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ATTORNEY
'
United States Patent ‘0 "
3,974,171
Patented Jan. 22, 1953
1
2
3,974,171
Hugh B. Crawford, 1354 S. Benton, Denver, Colo.
its intermediate portion, it can be reversed, end-for-end
within the central bore. In this manner, if one pointed
end should become blunted or damaged, the opposite end
may be easily utilized.
The pin 16 is releasably and adjustably retained with
in the central bore of portion 14 by means of counter
sunk setscrews 18 which can be manipulated by an Allen
wrench. This arrangement not only permits easy release
of the pin 16 for changing or reversing but also permits
SCRIBING TOOL FOR TEMBER
Filed May 17, 1960, Ser. No. 29,602
2 Claims. (Cl. 33-47)
This invention relates to a scribing tool, and it more
particularly relates to a scribing tool for marking trees
during a survey.
,
It has long been the practice in survey work to mark 10 longitudinal adjustment thereof.
certain bearing trees with circles and lines to indicate
On one portion of the periphery of the cylindrical por
certain information. However, the type of tools used in
tion 14 is provided a longitudinal recess 20 intersected
times past are not usually appropriate today because of
by a pair of tapped holes. Each of these holes is adapted
the difference in the average size of the. trees.
to receive an anchoring screw 22, these screws 22 serving
In former times, when the forests were still usually 15 to releasably hold a cutting blade 24, having a hooked
virgin, the average trees encountered were very old and,
cutting head 26 beveled as at 25 to opposite knife edges
therefore, quite large in diameter. Today, when the vir
27 in the recess 2%}. The blade 24 extends spaced from
gin forests have usually all been cut down and replaced
but substantially parallel to the pointed pin 16.
by relatively new plantings, the trees are, on the average,
Also provided on the outer periphery of the cylindrical
younger and smaller. Consequently, tools which circum 20 portion 14 are a pair of angular recesses 28. These re
scribe a large circle and were appropriate for the older
cesses 28 are provided on opposite sides of the portion
trees are not appropriate for today’s trees which require
14 approximately 90 degrees offset from the recess 249.
smaller circles in the markings.
These recesses 28 extend at a predetermined angle to
It is, therefore, one object of the present invention to
ward the front of the portion 14 and are each intersected
overcome the above disadvantages by providing a scribing 25 by a pair of tapped holes to receive anchoring screws 30
tool which is adapted to easily and effectively circum
for holding a cutting blade 32. in the corresponding re
scribe a relatively small circle or are on a tree.
cess 23. The blade 32 is identical and interchangeable
Another object of the present invention is to provide
with the blade 24- and is provided with a similar hooked
a tool of the aforesaid type which cannot only circum
cutting head 34. The blade 32 may be used alternately
scribe a small are or circle but which is adapted to easily
either in one or the other recesses 28 depending on how
and effectively enscribe straight lines in combination with
the tool is being used.
the arcs or circles, thus providing numerals and letters
The rear end of the handle 12 is open and is internally
when desired.
threaded to receive an externally threaded plug portion
Another object of the present invention is to provide
36 integral with a convex cap 38 having a knurled pe
a tool of the aforesaid type which is simple in structure, 35 ripheral portion 453. A shoulder is formed between the
light in weight and easy to handle.
cap 38 and plug portion 36 and this shoulder is adapted
Other objects of the present invention are to provide
an improved scribing tool, of the character described,
that is easily and economically produced, which is sturdy
in construction, and which is highly e?icient in operation.
With the above and related objects in view, this inven
tion consists in the details of construction and combina~
tion of parts, as will be more fully understood from the
to seat against the end of the handle 12. A brass lock
washer 42 is provided between the shoulder of the cap
38 and the end of the handle 12.
The cap 38and plug portion 36 are centrally apertured,
as at 44- and 46 respectively, for receiving a lanyard or
cable 47 by which it may be secured to the operator to
prevent loss thereof. The hollow interior of the handle
following description, when read in conjunction with the
12 is used to hold spare cutting blades, pins, and an
accompanying drawing in which:
45 Allen wrench, as Well as other small items as desired.
PEG. 1 is a side elevational view of a tree with a
scribing tool embodying the present invention in opera
In using the scribing tool 10, a tree, such as shown at
48, is debarked, as at 50, and the pointed end of pin 16
is inserted in the debarked portion. The tool 10 is then
rotated, with the pin 16 serving as the center of rotation,
tive position on a debarked portion of the tree.
FIG. 2 is an enlarged, detailed, side elevational view
of the scribing tool shown in FIG. 1.
50 to form an are or circle. In this action, the curved cut
FIG. 3 is a longitudinal sectional view of the tool of
ting head 25 forms as deep and wide cut as desired, de
FIG. 2.
pending on the depth of insertion of the pin 16. In
FIG. 4 is a sectional view taken on line 4—4 of FIG. 3.
similar manner, the curved cutting head 34 of blade 32
FIG. 5 is a sectional view taken on line 5~—5 of FIG. 3.
is used to form straight cuts by mere manipulation of
‘FIG. 6 is a fragmentary, detailed, elevational view of 55 the handle 12. By combining the various types of arcs
the scribing end of the tool.
or circles with selected straight lines, any desired num
FIG. 7 is a sectional view taken on line 7-7 of FIG. 2.
bers, letters or symbols may be made.
Referring in greater detail to the drawing wherein
Although this invention has been described in con
similar reference characters refer to similar parts, there
siderable detail, such description is intended as being
is shown a scribing tool, generally designated 10, com 60 illustrative rather than limiting, since the invention may
be variously embodied, and the scope of the invention
prising a stem or handle 12 of hollow construction and
tapered from a relatively wide rear end to a relatively
is to be determined as claimed.
Having thus set forth and disclosed the nature of this
invention, what is claimed is:
1. A timber scribing tool comprising an elongated
sirable material which is feasible for the task can be used. 65
tapered handle of hollow construction and provided with
The front end of the handle 12 consists of a solid
narrow front end. The handle 12 is preferably made
of cast aluminum or the like, although any other de
portion 14 of generally cylindrical shape, this portion
one open wide end and one substantially closed narrow
end, said open wide end being internally threaded, a re
14 being centrally apertured to form an axial bore.
movable knurled cap provided with a plug portion having
Within this bore is adapted to be held a pin 16 which is 70 external threads to mate with said internally threaded‘
pointed at both ends (as best shown in FIG. 3). Since
wide end, said substantially closed end being provided
this pin 16 is identical at both ends and is cylindrical at
with a central aperture leading into the hollow interior
3,074,171
4
3
projecting forwardly of said handle, said pin being point
of said handle, a pin releasably held in said central aper
ture with one end of the pin extending into said hollow
interior and the other end of the pin projecting forwardly ‘
of said handle, said pin being pointed at both of its ends,
at least one set-screw extending laterally through a
threaded hole in said closed end and releasably bearing
against said pin, a cutting blade havinga'curved cutting
head forming a double cutting edge, said blade extending
substantially parallel to and spaced from said pin, said
blade having one portion thereof seated in a longitudi
nally extending recess on the outer periphery of said
closed end, and a second cutting blade having a similar
curved cutting head, said second blade having one por
ed, at least one set-screw extending laterally through
a threaded hole in said closed end and releasably bearing
against said pin, a cutting blade having a curved cutting
head forming a cutting edge, said blade extending sub
stantially parallel to and spaced from said pin, said
blade having one portion thereof seated in a longitudi
nally extending recess on the outer periphery of said
closed end, and a second cutting blade having a similar
10 curved cutting head, said second blade having one por
tion thereof seated in a second recess on the outer pe
riphery of said closed end and extending angularly rela 15
tive to said pin and approximately 90 degrees oiiset from
said ?rst blade.
2. A timber scribing tool comprising an elongated
handle of hollow construction and provided with one
open end and one substantially closed end, a removable 2 O
cap provided with a plug portion mating with and se
cured to said open end, said substantially closed end
being provided with a central aperture leading into the
hollow interior of said handle, a pin releasably held in
said central aperture with one end of the pin extending 25
into said hollow interior and the other end of the pin
tion thereof seated in a second recess on the outer pe
riphery of said closed end and extending angularly rela
tive to said pin and approximately 90 degrees offset from
said ?rst blade.
References Cited in the ?le of this patent
UNITED STATES PATENTS
79,181
143,773
384,101
865,833
1,241,018
1,458,046
Andrews _____________ __ June 23,
Merritt ______________ __ Oct. 21,
Warner _______________ __ June 5,
Walton _____________ __ Sept. 10,
Rawles ______________ __ Sept. 25,
Garlatti ______________ __ June 5,
1868
1873
1888
1907
1917
1923
2,545,521
. Knapik ______________ __ Mar. 20, 1951
2,688,801
Hess _______________ __ Sept. 14, 1954
it
fin-765s,
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