A NEW OR IMPROVED DRAWING INSTRUMENT
Year: 1885

page_text: :
I, ALEXANDER HENRY REED, of 90 Cannon Street, in the county of Middlesex,
Engineer do hereby declare the nature of the said invention for A NEW OR
IMPROVED DRAWING INSTRUMENT, and in what manner the same is to be
performed, to be particularly described and ascertained in and by the following
statement:-
This invention relates to a tool designed chiefly for the use of draughtsmen. It
comprises a rod, preferably flat, provided with a scale on one or both faces, as
desired, and on the rod are placed two slides which project below the lower edge of
the rod and are provided at their ends with sockets, in one of which may be placed
a needle point, and in the other a pen or pencil. The slides also extend above the
upper edge of the rod, and their upper ends are provided with spindles which are
made to receive and grasp the ends of a flexible strip of steel or other suitable
material, in such a manner that by turning the spindles, the flexible strip can be
made to form curves of a great variety of forms, to assist draughtsmen, mechanics,
and tradesmen in drawing curviform lines, or for a guide in bending different
materials, or as working patterns.
and
The invention is illustrated in the accompanying drawing, in which
Fig 1 is a face view of one of the slides mounted on the graduated rod, and
Fig 1 is a vertical section thereof.
Fig 2 is a face view of the other slide mounted on said rod, and
Fig 2A is a vertical section thereof.
Figs 2B and 2° are views of a wrench.
Fig 3 shows a method of operating the slides by means of a micrometer screw,
Fig 3 is a vertical section thereof.
Fig 4 is a face view of plates X, Z, and other parts relating to means for
connecting the spindle E (which holds and adjusts the flexible strip) to slide B.
Fig 4B is a detail of a device relating to fig. 4.
Fig 5 is a face view of a slide mounted on the graduated rod, with modifications,
and
Fig 5 is a vertical section thereof.
Fig 6, and figures 6ª, 6³, 7, 7ª are face and sectional views of details relating to
the alides

page_text: Figs 8, 8, 9, 94, 10 are face and sectional views which explain the construction
when the slides are moved by a micrometer screw.
In the drawing the letter A designates a rod or plate which may be made of
wood, or metal, or faced with metal or any suitable material, and which is marked
on one or both faces with a scale of inches or centimetres and fractions thereof, or
it may be made without a scale.
With the rod A is combined slides B, B which may be connected to the rod A
by means of a screw a and nut C, as shown in figures 1, 14, 5, 54, so that the
slides can be secured to the rod in the desired position. In the example shown in
the figures 1, 14, 5, 54, the rod A is provided with plain grooves b, b at both edges,
and the screw a is made with an L shaped head which fits in one groove so that it
can slide therein, while the other groove receives the projecting edge of guide
plate K.
In the examples shown in figs 6, 6ª, 7, 74, 8, 8, 10, the rod A is
provided with a T shaped groove b and the screws a are made with T shaped
heads which fit the groove and are capable of being moved therein to allow the
slides to be adjusted to the desired positions on the rod, the clamping nut C being
provided as before to fasten them in position.
When the T shaped groove b and Ț shaped screw head are used as just
explained, the slides B are made to extend at right angles to the rod A by means of
notches Z Z made in their sides, in which are fitted pins Y, Y, which project from
the shaped heads of the screws, see figures 7. 7^.
The guide plate K, see figures 5, 54, is fastened to the slide B in the following
manner, namely the slide B has a slot M in which moves another slide B' which
bas at one end a hole n¹ to admit the screw a and another hole n¹¹ (see figure 5^) to
admit the screw a' whose head engages the upper edge of the guide plate K and
fastens it to slide B.
Between the shaped screw a, see figure 6, 64, and the slide B, is placed the
cross piece shown in figs 6B, 6º. The transverse bar t of the cross piece moves in
the T shaped groove b of rod A and its upright bar t³ moves in the slot M of
slide B.
When the nuts C and C¹ are released, referring to figs 5, 54, 6, 64, the slide B
can be moved up or down vertically upon the rod A and when in the position
required the nuts C and C' are tightened down. By loosening the nut, C, only,
the slide B is left free to be moved horizontally upon the rod A to any position
required.
By removing the nut C¹ and screw a¹, figs 5 5A, and nut C¹ and screw a¹,
figs 6. 64, together with the cross-piece t³, t³, figs 6B, 6°, the slide B can be used as
a common bevel placed up or down or to any desired angle with the rod A in any
position of the rod A. In this case the slides can be made of flat plate.
From the lower ends of the slides B extend legs C which can be secured to their
places by screws d, d, and which are removable on taking out the screws d. The
rear surfaces of the legs C are flush with the rear surface of the rod A, so that when
the rod is placed upon a sheet of paper or other plane surface, the legs C will also
rest thereon. To each of the legs C is fastened a socket D, the socket of one leg
being intended to receive a necdle point. c, and that of the other a pen or pencil.
The sockets are so adjusted that the needle point or pen or pencil when secured in
the sockets are exactly in line with the inner edges of the slides B, so that when
the slides B are adjusted on the rod A, the distance between the needle point
and the pencil corresponds exactly with the distance between the inner edges of the
slides B. If the slides are adjusted on the rod; for example with their inner edges
five inches from each other, the needle point and pencil are in position to draw a
circle of ten inches diameter. The sockets D are fastened to the legs C by set
screws g, so that they can be readily removed if the needle point and the pen or
pencil are not required.
The inner as well as the outer edges of the legs C, C can be used to draw
parallel lines, the distance of which can be gauged by moving the slides on the
graduated rod A.

page_text: In the top of the slides B, B, is fitted a spindle E by means of two plates X Z
fig. 4, each of which is provided with a semi-circular recess which fits into the
groove of spindle E, see fig. 2ª.
The plate X has two holes f" which correspond with two holes in the slide B,
into which the two pins fi projecting from a small plate, see fig 4B, are fitted.
The pin q, see fig 14 on a common set screw, together with the hook x, figs 14, 24
and 4 will fasten the two plates X, Z with the spindle E to the slide B.
The spindle E is bored out to receive the clamping screw wedge F. The inner
end of the spindle is provided with a transverse slot h, and with a tapering socket i,
in which works the wedge shaped end of the clamping screw wedge F, see figs 2^
and 14. The screw of this wedge extends out through the middle of the front end
of the spindle E, and is provided with a nut j, when this nut j is partly unscrewed,
the clamping wedge can be pushed in and an opening is thereby made to admit one
end of a flexible strip G. Several different flexible strips G may be provided, of
different thicknesses, so as to produce different kinds of curves as may be required.
The strip which may be selected, is introduced in the slot h, of spindle E, and by
tightening up the nut j, any portion of the flexible strip G can be, clamped between
the flat surface of the wedge and the edge of the slot, as seen in fig 14, or between
both flat inner surfaces of the double wedge as seen in fig. 24. Also the flexible
strip G can be secured, see fig. 54 in the slot h of spindle E, by the set screw F
pressing on a plate f
The controlling and holding in position and turning round of the spindle E is
effected by the gear wheel H which is fixed on the spindle E.
The pin q, fig. 14, has a screw with nut N, figs 1 and 14 at one end, and its other
end is screwed into and thus fastened to slide B. Over this pin q revolves the
pinion V which is mounted on a hollow shaft through which the pin q, passes.
A thumb wheel V₁ is fixed upon the outer end of this hollow shaft, so that by
rotating the thumb wheel V₁ one can turn the pinion V and wheel H, which are
geared together. S¹ is a spring washer placed on the pin q, between the nut N and
thumb wheel V¹.
In order to adjust the flexible strip G for different curves, the thumb wheel V¹ is
turned and thereby motion is given to wheel H through pinion V, and the spindle E
is turned, carrying with it one end of the flexible strip. By adjusting the slides B
on the rod A, the flexible strip can be readily adjusted to any desired curve and can
be secured in position to counteract any strain exercised by the flexible strip on the
spindle E, by fastening down the nut N.
A micrometer adjustment is obtained with the same result, but much more
exactly for minute curves, in which the spindle E, see figs. 2, 2ª is provided with
either a square or hexagon part k, on which fits the lever m. The oscillating screw P
turns without endwise motion, in its bearing Q which is secured to the slide B by
a swivel connection. The screw P screws into the threaded bearing R which in
like manner is secured to the lever m by a swivel connection. By turning the
screw P. motion is communicated through lever m to the spindle E and flexible
strip G.
The spindle E can also be turned round without operating the lever m, by
means of the screw t and its connections and related parts, see figs 2, 24.
The screw t is arranged to press upon the spring plate S one end of which is
fastened to the lever m and the other end works in the groove w of spindle E.
In the case of the operation of the screw t, the lever m oscillates upon the
spindle E from m¹ to m² as indicated by dotted lines, and when the lever m, is
situated at the point m², its square or hexagon opening which fits the square or
hexagon part of the spindle E is placed within the groove U' of the spindle E which
permits the spindle to be turned round without moving the lever m.
A wrench, figs 2B 2° fastened to a hollow shank into which can be fitted a pencil
or handle, is applied on a square or hexagon part m³ of the spindle E, and the
spindle can thereby be turned and the flexible strip adjusted to the nearest point
required. Then on releasing the screw t, the tension of the screw S will pull the

page_text: lever m back to the position m¹ when the spindle can be turned round by operating
the lever m, and after removing the wrench, figs. 2B 2º, the screw P can be turned
and the flexible strip be exactly adjusted to the curve required.
The micrometer screw P is omitted in figs 5, 5ª where the spindle E as already
stated is provided with a square or hexagon part k and with it is also provided a
clamping nut 1. On the square or hexagon part k, is fitted a lever m, when the
nut is released, the spindle E can be turned round by means of the lever m, and
when the desired form of curve is assumed, the nut is tightened up in position.
The square pin o see figs 9, 94, and 10, the T shaped head of which fits the
T shaped groove b may be provided with a conical hole q¹ through which may pass,
with a wedge like action, the pointed threaded pin c, and thus the T shaped head O,
be firmly secured in the T shaped groove b.
The slides B can be moved by a micrometer screw n indirectly, see figures, 2, 3,
34, 4, 8, 84, 9, 94, and 10 by fastening the plates W with the screw a and nut con
the rod A, then turning the screw n which revolves in its bearing o without endwise
motion, but is screwed in the screw bearings p.
In figs 2, 3, 34, 8, 84, 9 and 9 the plate W is shewn attached on one side of the
slide B, and in figs 4 and 10 it is placed within the slide.
Having now particularly described and ascertained the nature of the said
invention, and in what manner the same is to be performed, I declare that what
I claim is
1. The combination, substantially as described of the rod A, the slides B, B,
movable thereon and a flexible strip adjustably secured in the slides, for producing
and drawing curves.
2. The combination substantially as described of the rod A, with slides B, B,
adjustable thereon and adapted to receive a needle point and pen or pencil.
3. The combination, substantially as described, of the rod A, slides B, B, fitted
to be adjustable thereon, and having legs secured to the slides in a.
rear surface of the rod.
plane with the
4. The combination, substantially as described of the rod A, slides B B, fitted.
to be adjustable thereon, and provided with spindles E adapted to be turned in
the slides, and arranged to grasp a flexible strip for producing and drawing
curves.
5. The combination, substantially as described, of the rod A, and the slides B
fitted thereon with a micrometer adjustment as shown and described.
6. The combination, substantially as described, of the rod A, the adjustable
slides B B, the spindles E arranged in the slides and provided with a micrometer
adjustable for rotating the spindles, and the flexible strip G connected with the
spindles.
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