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UNITED STATES
PATENT
EEICE.
EZRA G. PETTIT, OF MARIETTA, OHIO.
ROOF-FRAMING TOOL.
SPECIFICATION forming part of letters Patent No. 695,339, dated March 1 1, 1902.
Application filed May 21,1901. Serial No. 61,243. (No model.)
T0 @ZZ whom, it may concern:
Be it known that I, FZRA G. PETTIT, a citi
4, forming an adjusting means for spacing
the above-mentioned bars apart. To the free
zen of the United States, residing at Marietta, ends of the respective bars I pivot plates 7 55
in the county of Washington and State of Ohio, and 8, connected to the same by the right
have invented new and useful Improvements angular flanges 9 and pivots 10, these plates
being adapted to hang over the rafter or ridge
in Roof-Framing Tools, of which the follow
ing is a specification.
This invention relates to new and useful
beam, as will be presently explained.
j
Pivoted to the under side of the plates 7
improvements in roof-framing tools; and its and 8 are graduated secondary plates 11 and
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primary object is to provide a device of sim 12, provided with a centrally-located up
ple construction whereby the rafters which wardly-projecting pins or bolts 13 and 14,
which work in segmental slots 15 and 16 in
the plates 7 and 8. These bolts carry, re
the proper bevels for the different styles of spectively, a hollow tubel and a graduating
compose the frame of a roof may be marked
upon their faces and edges, so as to secure
15 rafters employed.
65
bar (designated by the reference-numerals 17
and 18) similar to the ones heretofore de
that the same may be set after having been scribed and are for the purpose of spacing
l Another object is to so construct the tool
adjusted to the proper angles.
the plates apart. The set-screw is utilized 70
With these and other objects in view the for holding the spacing medium in a prede
invention consists in providing two arms, termined adjustment. The tube and rod are
which are hinged together at their adjacent held in position with relation to the bolts 13
ends and the opposite ends of which are con and 14 through the medium of thumb-nuts
nected by means of an adjustable rod pro 19 and 20.
75
vided with suitable graduations whereby the
It will be noticed that the outer edges of
.25 angle at which the arms are placed to each the respective plates are cut on an angle to
other is readily indicated.
the longitudinal edges thereof and with the
The invention also consists in providing graduations or scale on the secondary plaies
extensions which are hinged to the free ends are arranged so as to comprise a plurality of
of the arms at right angles thereto and which diverging lines which register with the outer
30 are adapted to overlap the edges of the raft edge, so as to throw the edges of the second
ers, upon which are placed the arms above
ary plates at varying angles with relation to
the plates 7 and 8, so as to provide for a dif
nected by an adjustable rod bearing suitable ferent miter on the beam to be cut. The ver
graduations and whereby the angle to be tically-extending bars 1 and 2 can also be ad
marked upon the edge of the rafter may be justed to conform to the top cut made in ac
referred to.
These extensions are also con
readily determined.
cordance with the adjusting or secondary
plates, or they may be arranged so as to guide
features of construction and combination of the saw at an entirely diiferent angle thereto. 90
y The invention also consists in certain novel
parts,whichwillbe hereinafterfully described
and claimed, and illustrated in the accom
panying drawings,~showing the preferred form
of my invention, and in which
l Figure 1 is a perspective view of the device
in position upon a beam or rafter.
It will be seen that a device made in ac
cordance with the above will be cheap and
durable in construction and that the securing
ends of the tube 17 and rod 18 are made flat,
so as to form washers constituting bearings 95
to rest between the plates 7 and 8 of the
thumb-nuts 19 and 20. By use of a device of
this character the beam may be cut at any
Fig. 2 is
45 a sectional detail view of one of the arms and
its extension.
l and 2 designate a pair of flat bars piv desired angle without the necessity of any
oted at their ends to form a hinge»joint 3. other tools, and so, while -I have described in
Intermediate the ends of the bar 1 is pivoted detail what to me at this time appears to be
50 a tube 4, carrying a set-screw 5 and in which the very best means of accomplishing the de~
is slidably secured a graduated bar 6, secured sired result, I would have it understood that
to the bar 2 and in connection with the tube I do not limit myself to the exact details of
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695,339
2
construction shown, but reserve the right to oted to the remaining arm and adapted to ex
. make slight changes and alterations as might tend into the tube, means for locking the rod
suggest themselves from time to time Without Within the tube, a plate hinged tothe free
departing from the spirit of my invention.
end of each arm and adapted to lie at right
b'l Having thus described the invention, what angles to the arm, a tube pivoted to one of
is claimed, and desired to be secured by Let the plates, a graduated rod pivoted to the re
maining plate and adapted to extend into 45
’
1. The combination of arms having right-` said tube, and means forlocking the rod With
angle extensions and hinged at their adjacent in the tube.
ends, a tube pivoted at one end directly to
5. The combination with arms hinged to
one arm and having its other end extending gether at their adjacent ends; of means for
toward the other arm, a rod having gradua adjusting said arms from or toward each 50
tions and pivoted at one end directly to the other, plates hinged to the ends of the respec
ters Patent, is“
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last-named arm and having its other end ex
tending toward the first-named arm and fit
tive arms, of pivoted secondary plates piv
oted to the ñrst-named plates and provided
With a plurality of graduations adapted to
aline with the edges of the iirst-named plates 55
and means for adjusting the graduated plates
2. The combination with arms hinged at With relation thereto.
their adjacent ends; of a right-angle exten
6. The combination with arms hinged to.
sion hinged to the free end of each arm, gether at their adjacent ends, of means for
ted to the tube, means located on the tube
for binding the tube and rod to their adjust
ment.
l
p
means for adjusting the arms from or toward `adjusting said arms from and toward each
each other, and means for adjusting the an
gles of the extensions to _each other inde
pendently of the arms.
3. The combination With arms hinged at
other, of plates pivoted to the free ends of
the respective arms, and lie in aplane at right
angles thereto, secondary plates hinged to
the first-named plates, and having upwardly
their adjacent ends; of means for adjusting projecting pins Working in slots in said iirst 65
said arms from or toward each other, a plate
hinged to the free end of each arm and ar
named plates, and means attached to said
pins for adjusting the secondary plates with , `
30 ranged in a plane at right angles thereto, a - relation to the iirst-named plate.
tube pivoted to one of the plates, a rod piv
oted to the remaining plate and adapted to
extend into the tube, said rod being provided
With suitable graduations, and means for
binding the rod Within the tube.
4. The combination with arms hinged to
gether at their adjacent ends; of a tube piv
oted to one of the arms, agraduated rod piv
In testimony whereof I afiix my signature
in presence of Witnesses.
`
EZRA G. PETTI'F.
Witnesses:
S. J. HATHAWAY,
GEORGE THEIs, -
FRANK MILLER.

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