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Патент USA US2137610

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NOV. 22, 1938.
J_ w_ GALLO
ABRADING INSTRUMENT
Filed Jan. 9, 193'?
’
2,137,61U
2,137,610
lgatented Nov. 22, 1938
UNITED STATES PATENT OFFICE
2,137,610
ABRADING INSTRUMENT
John W. Gallo, Revere, Mass.
Application January 9, 1937, Serial No. 119,747
4 Claims. (CI. 29—80)
My invention relates to abrading implements side of the ?le from that shown. Thus when
such as ?les, whetstones and the like and it has
for its object to provide an improved implement
0
the ?le is returned to the bench the calk will
support the same in reversed position from that
of the character indicated.
More especially the invention provides an
abrading implement of the character described,
shown.
In the embodiment of my invention shown in 5
or a holder for such an implement, provided
upon the side thereof with supporting calks so
that when the implement is placed upon a bench
holes Ila, one near each corner thereof, each of
10 or the like the work may be slid back and forth
thereon while the calks hold the implement
against moving with the work.
To these ends I have provided an improved
abrading implement having the novel character
istics set forth in the following description, the
several features of the invention being separate
ly pointed out and de?ned in the claims at the
close thereof.
In the accompanying drawing:-—
Fig. 1 is a top plan view of a bench ?le con
structed in accordance with this invention.
Fig. 2 is a side elevation, partly in section, of
the bench ?le shown in Fig. 1.
Fig. 3 illustrates another form of bench ?le.
The embodiment of my invention illustrated
in Figs. 1 and 2 comprises a hardened rectangu
lar metal ?le member ID formed with four holes
ll extending therethrough, one near each cor
ner, each of said holes ll being formed at its
opposite ends with conical countersinks l2.
The holes H are provided for the reception of
screws 13 having conical heads adapted to ?t
within the countersinks l2 so that the top sur
faces of said heads are ?ush with or below the
level of the top of the ?le.
These screws I3 serve to fasten calks M in posi
tion against the under side of the ?le member
I 0, each calk being formed with a threaded socket
l5 occupied by its screw l3; with a conical upper
end that is seated Within one of the counter
sinks I2 upon the under side of the ?le member,
and with a conical pointed lower end.
Thus when the ?le member is placed upon a
bench with the calks I4 resting in engagement
45 with the latter the work to be operated upon
may be shoved back and forth on the ?le member
while the calks serve to hold the latter securely
against displacement on the bench.
The ?le member Ill may be formed, as shown,
50 with abrasive surfaces upon both sides thereof,
and it will be clear that when one side of the ?le
becomes dull or worn the screws I3 may be re
moved from the holes II and reversed so as to
secure the calks H in position upon the opposite
Fig. 3 the ?le member ID is formed with four
which is countersunk as at [2 at its opposite ends
and also threaded. Into each hole I la is screwed
a calk member Ma which may be an ordinary 10
machine screw having a pointed end and‘a
countersunk head as shown.
What I claim is:
1. An abrading implement comprising a file
provided upon its opposite sides with abrading 1.3
surfaces, said ?le being formed with a plurality
of holes extending therethrough; calk devices
reversibly mounted within said holes and adapted
to support said ?le upon a bench or the like
with either of said abrading surfaces uppermost 20
and to hold said ?le against movement on said
bench or the like while the work is moved back
and forth thereon.
2. An abrading implement comprising a ?le
having an abrading surface, said ?le being formed 25
with a plurality of holes extending therethrough;
a screw occupying each of said holes and having
a head whose top is disposed below the plane of
the abrading surface of said ?le, and a pointed
calk member; secured in position against the 30
under side of said ?le by said screw.
3. An abrading implement comprising a ?le
having an abrading surface, said ?le being formed
with a plurality of holes extending therethrough
each of which is countersunk at its opposite ends; 35
a screw occupying each of said holes and having
a head occupying one of said countersinks so that
it is disposed below the plane of the abrading
surface of said ?le, and a pointed calk member
secured in position within the other countersink 40
of said hole by said screw.
4. An abrading implement comprising a ?le
made upon its opposite sides with abrading sur
faces, said ?le being formed with a plurality of
holes extending therethrough each of which is 45
countersunk at its opposite ends and also in
teriorly threaded, and a screw within each of
said holes and having threaded engagement
therewith, said screw having a head at one end
which occupies one of said countersinks and a 50
pointed extremity at its opposite end to serve as
a calk.
JOHN W. GALLO.
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