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Патент USA US2410467

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Nov. 5, 1946. .
Filed May 11, 1945.
Pa fr/ck lélenflhg _
Patented Nov. 5, 1946
Patrick Valentine, New York, N. Y.
Application May 11, 1945, Serial No. 593,178
1 Claim.
(01. 143—157)
(Granted under the act of March 3, 1883, as
amended April 30, 1928; 370 0. G. 757)
This invention relates to a safety device for
use in conjunction with circular power saws.
In conducting ripping operations on narrow
pieces of stock, it is common practice to feed the
work into the saw by pushing it with a piece of
scrap wood, the saw blade cutting well into the
pushing block or stick before it cuts completely
Hand grip I1 is preferably made of wood, al
though it will be apparent that metal, plastic
or other material may be used. If made of wood,
hand grip Il may be affixed to plate I6 by a plu
rality of wood screws I8, extending into hand
grip I ‘I through countersunk holes provided there
for in plate I6.
through the work piece. If the attention of the
One leg of one of clips I5 is longer than the
operator strays he may allow the saw to cut com
others and is adapted to engage work piece l4
pletely through the‘ pushing block and into his 10 by being formed into a series of steps I9, of
approximately 90°.
hand, or if his hand slips from the pushing block
it may move directly into the saw.
In operation, the device of this invention is
It is an object of this invention to provide a
gripped by means of hand grip I1 and placed upon
safety device for holding and impelling work
the fence or guide I3, each of clips I5 having one
during ripping operations with a power saw, with 15 leg on either side of guide I3. It will be apparent
which device the hand of the operator moves 'in
that the distance between the legs of clips I5
a path. parallel to that of the work piece but
will desirably be such as to permit the device
offset therefrom sufficiently to preclude contact
to slide smoothly on the guide I3 with but little
side play. Hand grip I‘! is preferably so shaped
between the hand and the saw.
Another object of this invention is to provide 20 as to be comfortably gripped by the palm and
?ngers of the hand, and of a convenient length
a safety device of the character described, in
for that purpose, six inches being a suitable
the use of which the direction of movement of
the operator's hand is not toward the cutting
Work piece I4 is then placed against guide I3,
edge of the saw.
Still another object of this invention is to 25 and its adjacent corner is engaged by one of
provide a safety device of the character de
steps I9 (Figure 1). With the safety device so
scribed which is adapted to hold and impel pieces
engaged with work piece I4, the work piece I4
may be held down against work table II and
of stock of varying thicknesses without adjust
pushed toward saw blade I2 by holding down
Further objects and advantages of this inven 30 hand grip I1 and moving it along the top of guide
I3. It will be apparent that the horizontal sur
tion, as well as its construction, arrangement and
operation, will be apparent from the following
face of one of steps I9 bears on the top of work
piece 14, while the vertical surface of an adja
description and claim in connection with the
cent vstep I9 bears on the end of work piece I4,
accompanying drawing, in which,
Figure 1 is a side elevation of the device of 35 inithis manner allowing work piece I4 to be
simultaneously held down and impelled toward
this invention, shown in its relation with a piece
the saw. Several of steps I9 are provided, to
of wood being ripped by a power saw.
be used with varying thicknesses of work so- that
Figure 2 is a front end elevation of the devic
plate I6 and hand grip U will not ride at too
of this invention.
Referring to the drawing in detail, II repre 40 great an angle relative to the top surface of guide
I3. It has been found desirable to grip the work
sents the work table of a conventional power saw,
piece I4 with the highest of steps I9 which will
and I2 is the upper portion of a circular saw
still keep the'lowest horizontal surface of the
blade protruding through work table I I. Behind
stepped leg out of contact with the work table I I.
saw blade I2 is a conventional fence or guide I3,
The stepped leg I5 of the safety device of this
parallel to saw blade I2 and spaced therefrom in 45
invention permits work piece I4 to be pushed
conformance with the thickness desired in the
completely past the saw blade I2, the stepped leg
product of the stock being worked upon, shown
passing between saw blade I2 and guide I3, with
as work piece I4.
out the operator’s hand ever approaching dan
The device of this invention comprises two
U-shaped clips I5, spaced by and joined to plate 50 gerously close to saw blade I2. By gripping hand
grip I ‘I, the operator may maintain a ?rm grip
I6. Hand grip I1 is secured to the surface of
on the material being cut, and there is no danger
plate I6 opposite to that to which are attached
of the operator’s hand touching the saw in the
clips I5. Clips I5 and plate I6 may be con
event the work slips out from under the stepped
veniently made of steel and joined together by
welding, or in any other conventional manner. 55 leg. Using this invention, the operator’s hand
wiil be continually pushing in a direction parallel
the United States of America for governmental
to the top surface of guide I 3 and above it, so
purposes without the payment of any royalties
that in the event the hand should slip from hand
thereon or therefor.
grip I‘! it will pass considerably above saw blade
What is claimed is:
l2, and not into it.
A safety device for use with circular power
saws comprising a rectangular ?at plate, a hand
It is to be understood that various modi?cations
and changes maybe made in this invention with
grip secured to one surface thereof, and a pair
out departing from the spirit and scope thereof
of spaced U-shaped clips secured to the other
surface thereof, one leg of one of said clips being
10 provided with a plurality of steps at its extremity.
factured and used by or for the Government of 7
as set forth in the appended claim.
The invention described herein may be manu
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