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Патент USA US2412489

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Dec. 10, 1946.
2,412,489
H. BIEG
SPOT GAUGE
_ Filed May 5, 1944
BY
/47‘ TUR/Vey
2,412,489
Patented Dec. l0, _ 1946
ATENT QFFICE
UNITED STATES
2,412,489
SPOT GAUGE,
Herman Bieg, St. Louis, Mo.
Application May 5, 1944, Serial No. 534,191
i claim. (Cl. 33--189)
i
This invention relates to spot gauges, its prin
cipal object being to produce such a gauge that
will enable the operator to spot material for
doweling or other purposes with absolute ac
curacy. While there are a number of spot gauges
in use, none, so far as I am aware, is absolutely
reliable. For instance, in spotting wood for
doweling it sometimes happens that the point
of the gauge will strike a knot in the wood, or per-
»
2
vertical member 2 is adapted to lie against the
vertical side of said wood, and both members I
and 2 are of such width as to oi‘r‘er substantial
contact with the wood, so that they may be heid
nrmly in place. A facing 5 is secured to the
inner face of the member 2 which contacts the
wood, and at its center portion a section of the
facing 5 is cut away for a purpose which will
be explained later. At the center oí the member
2 a rectangular aperture 6 is provided, and slightly
to one side of the aperture 5 a longitudinal slot
'I is cut into said member 2. A graduated scale
3 is vertically mounted upon the outer face of
the member 2 slightly to one side of the slot “I
haps will strike just at the edge of a knot, and in
this event the point will be slightly deñected and
the accuracy of the spotting will be impaired.
My gauge overcomes this hazard entirely.
Another object of my gauge is that it oiïers
sufficient surface for contact with the surface to 15 (Fig. 3).
In the cut-out portion of the facing 5 above
be spotted to enable the operator to hold it rlrmly
referred to, a section 9 of similar material is
in place against accidental tilting or slippage,
mounted for sliding up and down movement, so
which further increases the accuracy of the spot
that the section Q is visible through ‘the aperture
ting. Another important feature of my device is
that its construction permits far greater speed 20 ii and through the slot l, and an indicator Ill
is mounted upon said slidable section 9 in such
in spotting than is possible with the gauges here
a manner that it projects through the slot îI, the
tofore in use.
indicator IB being formed so that it extends over
For the sake of simplicity I will describe my
the scale 8, and it is obvious that as the section
gauge in this specification as used in spotting
S moves up or down the indicator moves with it
wood for doweling, but it is to be understood
over the scale 8.
that it could be used with equal success in marl;
A forwardly extending tubular member Ii is
ing other materials, or for other purposes than
mounted upon the section 9, and a plunger I2 ex
doweling, without departing from the spirit of the
tends through said tubular member l! for for
invention.
Fig. 1 is a plan view of my gauge as it appears 30 ward and backward movement, the forward end
of said plunger being provided with a knob K for
when in place on a piece of wood that is to be
easy manipulation, and at the opposite end vof
spotted.
the plunger a sharp-pointed element I3 is rigidly
Fig. 2 is a side elevation of my gauge in place
secured thereto so that the sharp point I3' pro
for the spotting operation.
trudes rearwardly through an aperture in the
Fig. 3 is a front view taken on line 3_3, Fig. 1,
sliding section 9 when the plunger I2 is pushed
illustrating particularly the vertical spotting
all the way back. A sleeve Iâ surrounds the
scale.
tubular member II, and the sleeve I6 is bisected
Fig. 4 is an enlarged sectional view taken on
by means of a curving cut as shown at I5. The
line 4_4, Fig. 1.
Fig. 5 is an enlarged sectional view taken on 40 forward portion of the sleeve Ill is rigidly se
cured to the tubular member Il, but the rear
line 5_5, Fig. 4.
ward portion of said sleeve is mounted for rotat
My spot gauge comprises a horizontal member
ing movement about said tubular member. The
I and a vertical member 2, the members I and
sleeve I4 extends rearwardly to a point just short
2 preferably being formed integrally of a single
piece of any suitable material which forms a right 45 of the vertical member 2, and an apertured disk
I6 is inserted between said member 2 and the
angle at 3. The member I is substantially T
sleeve so that the plunger may be pushed rear
shaped (Fig. 1), and near its bent edge 3 and at
wardly through said disk, since the aperture in
the center of the transverse arms of the T
the disk IIS and the above-mentioned aperture in
shaped member I a diamond-shaped aperture fl
is provided for a purpose to be hereinafter set 50 the sliding member 9 are in registration with
each other. The purpose of the disk I5 is to offer
forth.
more contact surface between the sleeve I4 and
As has been said, the members I and 2 are at
the vertical member 2, and it is not rigidly secured
right angles to each other, so that the member
to either of the last-mentioned elements. An
I is adapted to lie upon the upper surface of a
piece of wood to be spotted for doweling and the 55 apertured disk I1 is rigidly mounted upon the
2,412,489
3
rotatable portion of the sleeve I4, and this disk
I ‘I is of such size that it may be conveniently
grasped by the operator.
In use the procedure is as follows: A piece of
wood W is to be spotted for doweling. First the
operator spaces on“, probably with lead pencil lines
I8, the distances at which the dowel pins are to
be inserted. I-Ie then lays the gauge upon the
wood surface above the ñrst of the lead pencil
marks so that the pencil mark comes exactly at
4
The camming action of the curved out I5 holds
the indicator securely in position, so all that the
operator needs to do if he wants to mark the
wood for a series of dowel pins is to move the
gauge along from one pencil mark to the next,
being careful each time to see that the pencil
mark comes exactly at the acute angles of the
aperture 4, and then strike a blow on the knob
K, and all his marks will be in exact alinement,
and it will be seen that this operation can be
the acute angles of the diamond-shaped aperture
performed with great rapidity.
4 in the T-shaped member I. The operator
When this operation has been completed and
knows at what depth from the top of the wood
it is desired to set the indicator at another depth,
he wishes to insert the dowel pins. It will be
it is only necessary to release the camming action
remembered that the indicator II] is slidable up 15 by turning the disk I1, when the above procedure
and down with the sliding member 9, and the
can be repeated.
operator now sets the indicator at exactly the
While I have shown the aperture 4 with its
required depth on the graduated scale 8 by movacute angles pointing to the front and rear of the
ing up or down the knob K which is secured to
device, it is obvious that it could be so placed that
the plunger I2, the up and down movement be 20 its obtuse angles occupied these positions, in
ing transmitted to the sliding member 9 through
which case the lead pencil line IB would of course
the tubular member II which is rigidly secured
come at the obtuse angles,
to said slidingr member, all of which is obvious
I claim:
from the description of these parts given above.
A spot gauge comprising a member provided
When the indicator has been set, the operator 25 with a sight opening and a second member form
grasps the disk I? and turns it either to the right
ing a right angle with said first member, a slid
or left, which movement is transmitted to the
able portion on the rear face of said second mem
rotatable portion of the sleeve I4. It will be re
ber, a measuring scale mounted on said second
called that the sleeve I4 is bisected by a curving
member, an indicator mounted on the slidable
cut I5, and when the rotatable portion is turned 30 portion and movable therewith through a slot in
a suiñcient distance this curving cut provides a
the second member, a tubular member rigidly
camming action which forces the rotatable por
mounted on said slidable portion and movable
tion of the sleeve I4 ñrmly against the disk I6,
therewith through an aperture in said second
which in turn is forced ñrmly against the vertical
member, a housing for said tubular member, said
’
member 2 and there held in gripping engagement,
housing being bisected by a curving cut and one
which prevents further up and down movement
section of said housing being rigidly Secured to
of the slidable face 9 and consequently of the in
said tubular member while the other section is
dicator I9.
rotatable about said tubular member, so that said
The sharp point I3 is so positioned as to be in
curving cut affords camming action when a sec
exact alinement with the indicator IU, and it will 40 tion of said housing is rotated about said tubular
be readily understood that now the point I3 is
member for retaining said slidable portion at a
at exactly the same depth on the wood as the in
predetermined position, and an element termi
dicator shows.
All the parts are now in the
nating in a sharp point and 'adapted for forward
right position for marking, and the operator
and backward movement within said tubular
strikes a blow on the knob K, which drives the
.member for making a mark on the article to be
plunger I2 backwardand forces the sharp point
spotted atv a point in alinement with said indi
cator.
I3 into the wood, thus leaving a mark for boring
a hole at exactly the place where it desired to
HERMAN BIEG.
insert a pin or provide a hole for the reception of
a, pin.
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