Improvements in Drawing, Sketching, and Designing Tables.
Year: 1895

page_text: Date of Application, 25th Mar., 1895
Complete Specification Left, 7th Nov., 1895-Accepted, 1st Feb., 1896
PROVISIONAL SPECIFICATION.
Improvements in Drawing, Sketching, and Designing Tables.
We, SAMUEL JOHN LAUGHLIN, Mechanic, of Waterloo Avenue, and JAMES
HOUGH, Printer, of Kent Street, both of the City of Guelph, in the County of
Wellington, in the Province of Ontario, Canada, do hereby declare the nature of
this invention to be as follows:-
Our invention relates to improvements in drawing, sketching and designing
tables and the object of the invention is to design such a table as can be readily
manipulated by the draughtsman in order to rapidly, accurately and easily make
any desired class of drawing and it consists essentially of a table provided with a
circular opening with a protracting scale extending preferably half way around the
edge of the same and within which is supported a circular board, means being
provided for holding the paper on the board controlling the rotation and position
of the same and a rule peculiarly controlled being arranged to be moved across the
board at will with or without reference to peculiarly adapted movable or adjustable
scales as hereinafter more particularly explained.
Fig. 1, is a perspective view of our drawing table with portion of the board
broken away to exhibit the peculiarities of construction.
Fig. 2, is a plan view of the table.
Fig. 3, is a side sectional elevation through the line x-―y y—z Fig. 2.
Fig. 4, is a detail of the drawing board.
Fig. 5, is a detail showing ineans of fastening the controlling cord to the
adjustable rule and catch.
Fig. 6, is a detail of the copy holder.
Fig. 7. is a perspective view of a drawing table constructed in accordance with
our improvements.
Fig. 8, is a sectional detail showing the spacing wheels and co-acting dogs.
In the drawings like letters of reference indicate corresponding parts in each
figure.
A, is the drawing table provided with a circular opening, a, and cross bars, A.
A2, are brackets secured beneath the two central cross bars. B, is a spindle, which
extends through the brackets, A³, and the enlarged top, C', of the adjustable
standard, C. The standard, C, is held in cross bars, D', connecting the supporting
standards, D, which are flared out at the bottom to provide a stable base. E, is a
screw spindle provided with a hand wheel, E'. The screw spindle, E, is secured
at the bottom in the bracket, d', forming part of the cross bar, D', and extends
through a threaded hole made in the bracket, e, attached to the standard, C. It
will thus be seen that by manipulating the haud wheel the height of the table may
be changed to suit the draughtsman.
F, F, are two stays pivotally connected at the top to the front end of the
central cross bars, A', A', and having slots, f, made in the lower portion of the
stays through which extends the screw, d, provided with thumb nuts, d². By
loosening the thumb nuts, 2, the position or incline of the table, A, may be varied
to any desired slant. G, is a circular board, which is preferably raised slightly
above the level of the table, A, and is provided with a central plate, g, in which is
made a square hole, g', directly in the centre of the board. h, is a spindle
journalled in the bars, H, extending between the central cross bars, A', centrally
between the front and rear sides of the board. The top, h', of the spindle is
square and fits within the square hole, g', made in the plate, g. Between the

page_text: plates, H, H, upon the spindle, h, is secured a pulley, 1. i, i, are guiding pulleys,
which are loose on the spindle, i', extending between the central cross bars, A', A'.
J, is a chain, which is secured to and passes around the pulley over the guiding
pulleys, i, i, down to the pedals, k, which are hinged to the front cross bar, K,
secured to the bottom of the standards, D, D.
a', is the protractor preferably formed of celluloid around the nearer edge and
balf of the circular hole, a. The protractor is divided into a scale of ninety degrees
from each side of the zero point, which is opposite the centre of the front of the
table.
The board, G, is supported upon friction rollers, 93, and is provided with a
pointer,, which is normally directly opposite the zero point in the protractor and
has also a catch, 95, extending from the edge thereof. The catch, 98, is designed
to be brought alternately into contact with each pivoted stop, L, when thrown in
the position shown in Figs. 1 and 2. The edges of the stops with which the catch
comes in contact are exactly ninety degrees apart, so that when the board is
swung around by pressing on one or other of the pedals, k, one position of such
board is exactly at right angles to the other. The outer ends of the stops, L, are
provided with knobs, l, and abut the adjustable screw pins, 11, which extend
through the blocks, 12, secured to the top of the table, A. By means of these
screw pins the contact edges of the pivoted stops 1, may be trued to an exact
distance of ninety degrees. Stop pins, 3, are also provided to limit the movement
of the stops, L, in the opposite direction as indicated by dotted lines in Fig. 2,
when desired to rotate the board freely.
M, is a clamp, which is secured to a block, m, hinged at, m¹, to the back of the
table. m², is a spring extending between the block, m, and the back of the
table, A. The clamp, M, extends over the edge of the circular board, G, and has
a screw pin, n, extending through a hole in it from the table, A. The knob N, is
provided, which is screwed on to the top of the pin, n, and is designed to bring the
clamp to press against the board, G, so as to hold it in any position to which it
may be rotated. Immediately upon the knob being loosened, however, the
spring, m², will force the clamp upwardly from the board, G, and allow it to be
rotated to any position desired.
The circular board, G, is provided with arc-shaped clasps, O, which are pivoted
at, o, and fit down upon the retaining bent pins, o¹, so as to grasp the turned down
edge of the drawing paper or card between the clasp and the edge of the board.
It will be seen that by manipulating the pedal and placing the pointer, g, in the
position shown in dotted lines the drawing paper is set with its edge at an angle to
the sides of the table and consequently lines may be drawn on the same at an angle
to its edges, in this instance the angle being thirty degrees a rule or rules being
employed for this purpose, which rules we shall now describe.
The
The rule, P, is provided with an upwardly extending tongue, p, which fits into a
groove, g, in the scule marked rule, so as to permit of its longitudinal adjustment
upon the rule, P, and yet bold it perfectly parallel and connected with same.
p', are downwardly extending blocks secured to the bottom of the rule, P. The
block, p, at the left hand side of Fig. 2, extends through a slot, as, which is made
in the end, A3, which is substantially flush with the surface of the board, G.
other block, p', at the opposite end of the board extends down at the outside edge
of the board. Each of the blocks, pl, have secured to them by a screw, p², the
endless cord, R, which extends over the front and back grooved pulleys, r, and, r,
and is wound around a central pulley, 2, which is journalled on the outer end of
the central spindle, B¹, which is journalled at its outer end in the bearing
block, A. The pulley, r, is shown in dotted lines, so as to exhibit means whereby
it is adjusted so as to tighten or slacken the cord, R. This means consists of the
thumb screw, which extends through the head portion, A³, of the table and the
slot, into the plate, r, to the inside of a slot, », of the bearing block, in
which the pulley, r, is placed. The other pulley, r¹, is journalled in a slot, 28, in
the bearing block, 7.

page_text: Within the slot, e³, in the end, A³, we journal a rotatable longitudinally scale
notched and grooved bar, S. the notches being ratchet shaped and cut on the strip
between the longitudinal groove, S2, which are arranged alternately with the
strips, S. The scale marked notches are varied as to distances apart from one
thirty-second or even less to any desired size. On the outer end of the spindle, s,
of the bar, S, is secured a collar, s', on which is indicated opposite the strips, S³, the
particular scale of each strip. The turning knob, S2, is secured on the end of
the spindle, so as to enable any desired scale on the collar, s', to be turned opposite
the pointer, S'. In order to ensure all the points of the collar being held securely
opposite the pointer we provide a toothed wheel, s³, which is engaged by a spring
dog, s. The top of the collar, s', and bar, S, are necessarily below the level of
the top of the end, A³. The bar, S, is shown in the drawing with one of the
grooves, S2, opposite the pointer. p³, is a catch tooth secured in the bottom of
the rule, P, (see full lines in Fig. 5, and dotted lines in Fig. 2). The catch
tooth, p³, has one edge slanting so that it will readily slide downwardly or to the
front of the table over the correspondingly formed ratchet shaped notches in the
strips, S3, of the bar, S. In cross sectioning or other similar work in drawing it
will be seen that any desired distances may be equally spaced very expeditiously.
The rule, P, is of course moved back along the bar, S, preferably by raising the
handle, p. At the right hand side of the board is another raised end, A', which
is substantially flush with the board and is provided with a longitudinal recess, a³,
in which is fitted the scale, A, which is adjustable by means of a thumb screw, a",
extending through the front end of the board. By means of this adjustable
scale, A, we are enabled if we have a certain line on the paper to adjust the scale,
so as to bring definite points on it directly opposite the line and then set off from
this line any number of equal distances.
In order to provide for the holding of a copy we provide a holder, T, which is
provided with rests, t, and swivelled spring fingers, t, and is held to the table by
the forwardly extending bars, t2, secured to the back of the holder and fitting
within sockets, a', secured to the bottom of the rear end of the table (see Figs. 1
and 6).
We also provide an instrument holder, U, which is provided with a raised edge, u,
and a centrally located sleeve, u', secured to the bottom of it. The instrument
holder, U, is supported upon a rod, V, which extends through the sleeve, u', and is
secured in any desired position in the rod by the set screw, u³. The inner end of
the rod is squared at the top and fits beneath the cross bars, A'¹ to which it is held
by the cleats, v, (see dotted lines Fig. 1, and full lines Fig. 3,). The instrument
holder, U, is also provided with legs, u², which extend below the bottom of the
sleeve, u', so that when it is removed from the rod it will rest level upon any table
upon which it may be placed.
In Figs. 7 and 8, we show an alternative simple form of board in which the
standards and pedals are dispensed with. A, is the drawing table provided with a
circular opening, a, and a base board, 2. The board, G, has journalled underneath
it a series of rollers, 3, arranged concentrically on which it is supported, the said
board being held centrally by a pin, 4, forming part of the plate, 5, which is
attached to the base board.
The pointer, g, is secured to the edge of the board, G, and extends slightly over
the protractor, a¹. 6, is a catch having a notch, 7, at the front side and a knob, 8.
9, is a spring fitting within a recess, 10, beneath the catch and extending up into a
slot, 11, in the catch, 6, and, 12, is a screw, which extends through the slot into
the top of the table, A. The screw, 12, serves to limit the movement of the
catch, 6, which is always forced by the spring, 9, towards the board, G. 13, 131, are
brackets secured to the edge of the board, G, at exactly ninety degrees apart, one
edge of each bracket being diametric and the other bevelled, the diametric edges
being to the inside. The brackets, 13, 131, are designed to co-act with the notch, 7,
in the catch, 6. 14, is a spring clamp pivoted on the catch, 6, provided with a
knob, 14', and designed to hold the board in position when oblique lines are being

page_text: drawn. 15, 151, are side bars extending above the surface of the table and forming
end supports for the rule, P, each end of which is provided with felt strips, 16,
and, 16, to rest upon the side bars, 15, and, 15. The rule, P, has downwardly
extending ends, 17, from which extend pins, 18, into the side grooves, 19, in the
bars, 15, thus serving to hold the rule down in position.
20, is a roller journalled at each end by pins, 21, in bearing brackets, 22, and
extending through a longitudiual opening, 20', in the rule, P. 23, are spools
formed at each end of the roller, 20. 24, is a cord preferably of cat gut which
extends from a nut, 25, in which it is fastened through a hole, 26, in the table into
a groove, 27, up through the opening, 20', and a couple of times around the spool
to which it is fastened at two points, the continuation of the cord, 24, passing down
along the groove, 27, through the hole, 28, to the front groove, 29, made in the
table, A. The front groove is covered by a bar, 30. The cord, 24, passes across
the front groove 29, and through a corresponding hole, 28, on the opposite side
thence into the groove, 27, and around the corresponding spool, 23, back through
the groove 27, hole, 26, to a nut corresponding to the nut, 25, in which this end is
fastened. The nuts, 25, are longitudinally adjustable within recesses, 31, by the
screw knobs, 32.
By means of the screw knobs, 32, the edge of the rule can be adjusted to a
nicety, so as to be exactly parallel with the front edge of the table and the degree
of tension of the cord regulated, so as to permit of the rule working freely.
33, are spacing wheels secured at one end of the roller, 20, one at each side of
the spool, 23. The wheels, 33, preferably have ratchet-shaped teeth. 34, are
co-acting dogs, which are pivoted on a bar, 35. The tails, 34, of the dogs, 34,
extend within double notched spring fingers, 36.
When the tails are within the
upper notch the dog is in engagement with the teeth of the wheel and the rule
may be moved towards the draughtsman a space at a time. When the tail, 34', of
the dog, 34, is moved down to the lower notch the rule may be moved with perfect
freedom backwards and forwards. Although we show only two it will of course
be understood that any number of wheels may be provided, depending upon the
spaces required for sectional or other work.
Each spacing wheel hereinbefore mentioned is arranged with different width of
teeth, this depending upon the spaces desired for sectional or other work in which
equal spacing is required.
As the rule is being moved forwardly and rearwardly it will be seen that the
cord on each spool will be winding and unwinding and always serve to maintain
such rule in position parallel with the front and rear of the board.
It will be seen from the construction of the table herein before described that it
is extremely simple and cheaply made and has a minimum number of parts to
enable the draughtsman to conveniently, accurately and rapidly accomplish any
desired adjustment for any class of work.
Dated this 28th dow of March 1895
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicants.
Improvements in Drawing, Sketching, and Designing Tables.
We, SAMUEL JOHN LAUGHLIN, Mechanic, of Waterloo Avenue, and JAMES
HOUGH, Printer, of Kent Street, both of the City of Guelph, in the County of
Wellington, in the Province of Ontario, Canada, do hereby declare the nature of
this invention and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement :-
Our invention relates to improvements in drawing sketching and designing tables

page_text: and the object of the invention is to design such a table. as can be readily
manipulated by the draughtsman in order to rapidly, accurately and easily make
any desired class of drawing and it consists essentially of a table provided with a
circular opening with a protracting scale extending preferably half way around
the edge of the same and within which is supported a circular board, means being
provided for holding the paper on the board controlling the rotation and position
of the same and a rule peculiarly controlled being arranged to be moved across
the board at will with or without reference to peculiarly adapted moveable or
adjustable scales as hereinafter more particularly explained.
In the drawings accompanying our Provisional Specification
Fig. 1, is a perspective view of our drawing table with portion of the board
broken away to exhibit the peculiarities of construction.
Fig. 2, is a plan view of the table.
Fig. 3, is a side sectional elevation through the line x―y y― Fig. 2.
Fig. 4, is a detail of the drawing board.
Fig. 5, is a detail showing meaus of fastening the controlling cord to the
adjustable rule and catch.
Fig. 6, is a detail of the copy holder.
Fig. 7, is a perspective view of a drawing table constructed in accordance with
our improvements.
Fig. 8, is a sectional detail showing the spacing wheels and co-acting dogs.
In the drawings like letters of reference indicate corresponding parts in each
figure.
A, is the drawing table provided with a circular opening, a, and cross bars, A'.
A2, are brackets, secured beneath the two central cross bars. B, is a spindle,
which extends through the brackets, A2, and the enlarged top, C1, of the adjustable
standard, C. The standard, C, is held in cross bars, D', connecting the supporting
standards, D, which are flared out at the bottom to provide a stable base. E, is a
screw spindle provided with a hand wheel, E. The screw spindle, E, is secured at
the bottom in the bracket, d', forming part of the cross bar, D', and extends
through a threaded hole made in the bracket, c, attached to the standard, C. It
will thus be seen that by manipulating the hand wheel the height of the table may
be changed to suit the draughtsman.
F, F, are two stays pivotally connected at the top to the front end of the central
cross bars, A', A', and having slots, f, made in the lower portion of the stays
through which extends the screw, d, provided with thumb nuts, d². By loosening
the thumb nuts, d², the position or incline of the table, A, may be varied to any
desired slant. G, is a circular board, which is preferably raised slightly above the
level of the table, A, and is provided with a central plate, g, in which is made a
square hole, g', directly in the centre of the board. h, is a spindle jourualled in
the bars, H, extending between the central cross bars, A', centrally between the
front and rear sides of the board. The top, h', of the spindle is square and fits
within the square hole, g', made in the plate, g. Between the plates, H, H, upon
the spindle, is secured a pulley, I. i, i, are guiding pulleys, which are loose on
the spindle, i, extending between the central cross bars, A', A. J, is a chain,
which is secured to and passes around the pulley over the guiding pulleys, i, i, down
to the pedals, which are hinged to the front cross bar K, secured to the bottom of
the standards, D, D.
a', is a protractor preferably formed of celluloid around the nearer edge and
half of the circular hole, a. The protractor is divided into a scale of ninety
degrees from each side of the zero point, which is opposite the centre of the frout
of the table.
The board, G, is supported upon friction rollers, 93, and is provided with a
pointer, y, which is normally directly opposite the zero point in the protractor and
has also a catch, 9, extending from the edge thereof. The catch, g, is designed
to be brought alternately into contact with each pivoted stop, L, when thrown in
the position shown in Figs. 1 and 2. The edges of the stops with which the catch

page_text: · comes in contact are exactly ninety degrees apart, so that when the board is swung
around by pressing on one or other of the pedals, k, one position of such board is
exactly at right angles to the other. The outer ends of the stops, L, are provided
with knobs, 7, and abut the adjustable screw pins, 1, which extend through the
blocks,, secured to the top of the table, A. By means of these screw pins the
contact edges of the pivoted stops, L, may be trucd to an exact distance of ninety
degrees. Stop pins, ³, are also provided to limit the movement of the stops, L, in
the opposite direction as indicated by dotted lines in Fig. 2. when desired to rotate
the board freely.
M, is a clamp, which is secured to a block, m, hinged at, m', to the back of the
table. m², is a spring extending between the block, mn, and the back of the table, A.
The clamp, M, extends over the edge of the circular board, G, and has a screw
pin, n, extending through a hole in it from the table, A. The knob N, is provided,
which is screwed on to the top of the pin, n, and is designed to bring the clamp to
press against the board, G, so as to hold it in any position to which it may be
rotated. Immediately upon the knob being loosened, however, the spring, m², will
force the clamp upwardly from the board, G, and allow it to be rotated to any
position desired.
The circular board, G, is provided with arc-shaped clasps, O, which are
provided at, o, and fit down upon the retaining bent pins, o, so as to grasp the
turned down edge of the drawing paper or card between the clasp and the edge of
the board.
It will be seen that by manipulating the pedal and placing the pointer, 9, in the
position shown in dotted lines the drawing paper is set with its edge at an angle to
the sides of the table and consequently lines may be drawn on the same at an angle
to its edges, in this instance the angle being thirty degrees, a rule or rules being
employed for this purpose, which rules we shall now describe.
The rule, P, is provided with an upwardly extending tongue, p, which fits into a
groove, g, in the scale marked rule, so as to permit of its longitudinal adjustment
upon the rule, P, and yet hold it perfectly parallel and connected with same.
p, are downwardly extending blocks secured to the bottom of the rule, P. The
block, p', at the left hand side of Fig. 2, extends through a slot, a³, which is made
in the end, A³, which is substantially flush with the surface of the board, G. The
other block, pl, at the opposite end of the board extends down at the outside edge
of the board. Each of the blocks, p', have secured to them by a screw, ², the
endless cord, R, which extends over the front and back grooved pulleys, ", and, ¹,
and is wound around a central pulley, 2, which is journalled on the outer end of
the central spindle, B', which is journalled at its outer end in the bearing block, A*.
The pulley, r, is shown in dotted lines, so as to exhibit means whereby it is adjusted
so as to tighten or slacken the cord, R. This means consists of the thumb screw r³,
which extends through the head portion, A*, of the table and the slot, », into the
plate, r, to the inside of a slot, 76, of the bearing block, 7, in which the pulley, r,
is placed. The other pulley, r', is journalled in a slot, 8, in the bearing
block, 9.
Within the slot, a³, in the end, A³, we journal a rotatable longitudinal scale
notched and grooved bar, S, the notches being ratchet shaped and cut on the strip
between the longitudinal groove, S³, which are arranged alternately with the
strips, S³.
The scale marked notches are varied as to distance apart from one thirty-second
or even less to any desired size. On the outer end of the spindle, s, of the bar, S,
is secured a collar, s¹, on which is indicated opposite the strips, S3, the particular
scale of each strip. The turning knob, S2, is secured on the end of the spindle, so
as to enable any desired scale on the collar, s', to be turned opposite the pointer, S¹.
In order to ensure all the points of the collar being held securely opposite the
pointer we provide a toothed wheel, s³, which is engaged by a spring dog, st. The
top of the collar sl, and bar, S, are necessarily below the level of the top of
the end. A³. The bar, S, is shown in the drawing with one of the grooves, S³,

page_text: opposite the pointer. p³, is a catch tooth secured in the bottom of the rule, P,
(sce full lines in Fig. 5, and dotted lines in Fig. 2). The catch tooth, p³, has one
edge slanting so that it will readily slide downwardly or to the front of the table
over the correspondingly formed ratchet-shaped notches in the strips, S³, of the
bar, S. In cross sectioning or other similar work in drawing it will be seen that
any desired distances may be equally spaced very expeditiously. The rule, P, is-
of course moved back along the bar, S, preferably by raising the handle, . At
the right hand side of the board is another raised end, A5, which is substantially
flush with the board and is provided with a longitudinal recess, a³, in which is fitted
the scale, A, which is adjustable by means of a thumb screw, a, extending
through the front end of the board. By means of this adjustable scale, A, we are
enabled if we have a certain line on the paper to adjust the scale, so as to bring
definite points on it directly opposite the line and then set off from this line any
number of equal distances."
In order to provide for the holding of a copy we provide a holder, T, which is
provided with rests, t, and swivelled spring fingers, t¹, and is held to the table by
the forwardly extending bars, t, secured to the back of the holder and fitting
within sockets a', secured to the bottom of the rear end of the table, (see Figs. 1
and 6).
We also provide an instrument holder, U, which is provided with a raised'
edge, u, and a centrally located sleeve, u', secured to the bottom of it. The
instrument holder, U, is supported upon a rod, V, which extends through the-
sleeve, u, and is secured in any desired position in the rod by the set screw, u³.
The inner end of the rod is squared at the top and fits beneath the cross bars, A',
to which it is held by the cleats, v, (sce dotted lines in Fig. 1, and in full lines in
Fig. 3). The instrument holder, U, is also provided with legs, u², which extend
below the bottom of the sleeve, u', so that when it is removed from the rod it will
rest level upon any table upon which it may be placed.
In Figs. 7 and 8, we show an alternative simple form of board in which the
standards and pedals are dispensed with. A, is a drawing table provided with a
circular opening, a, and a base board, 2. The board, G, has journalled underneath.
it a series of rollers, 3, arranged concentrically on which it is supported, the said
board being held centrally by a pin, 4, forming part of the plate, 5, which is.
attached to the base board.
The pointer, g, is secured to the edge of the board, G, and extends slightly over
the protractor a. 6, is a catch having a notch, 7, at the front side and a knob, 8..
9, is a spring fitting within a recess, 10, beneath the catch and extending up into a
slot, 11, in the catch, 6, and, 12, is a screw, which extends through the slot into the
top of the table, A. The screw, 12, serves to limit the movement of the catch, 6,.
which is always forced by the spring, 9, towards the board, G. 13, 13', are brackets
secured to the edge of the board, G, at exactly ninety degrees apart, one edge of
each bracket being diametric and the other bevelled, the diametric edges being to.
the inside. The brackets, 13, 131, are designed to co-act with the notch, 7, in the
catch, 6. 14, is a spring clamp pivoted on the catch, 6, provided with a knob, 14',
and designed to hold the board in position when oblique lines are being drawn.
15, 15, are side bars extending above the surface of the table and forming end
supports for the rule, P, each end of which is provided with felt strips, 16, and, 16',.
to rest upon the side bars, 15, and, 15'. The rule, P, has downwardly extending
ends, 17, from which extend pins, 18, into the side grooves, 19, in the bars, 15, thus
serving to hold the rule down in position.
20, is a roller journalled at each end by pins, 21, in bearing brackets, 22, and
extending through a longitudinal opening, 201, in the rule, P. 23, are spools
formed at each end of the roller, 20. 24, is a cord preferably of silk which extends
from a nut, 25, in which it is fastened through a hole, 26, in the table into a
groove, 27, up through the opening, 201, and a couple of times around the spool to
which it is fastened at two points, the continuation of the cord, 24, passing down
along the groove, 27, through the hole, 28, to the front groove, 29, made in the

page_text: table, A. The front groove is covered by a bar, 30. The cord, 24, passes across
the front groove 29, and through a corresponding hole, 28, on the opposite side
thence into the groove, 27, and around the corresponding spool, 23, back through
the groove 27, hole, 26, to a nut corresponding to the nut, 25, in which this end is
fastened. The nuts, 25, are longitudinally adjustable within recesses, 31, by the
screw knobs, 32.
By means of the screw knobs, 32, the edge of the rule can be adjuste.l to a
nicety, so as to be exactly parallel with the front edge of the table and the
degree of tension of the cord regulated, so as to permit of the rule working
freely.
33, are spacing wheels secured at one end of the roller, 20, one at each side of
the spool, 23. The wheels, 33, preferably have ratchet-shaped teeth. 34, are
co-acting dogs, which are pivoted on a bar, 35. The tails, 34', of the dogs, 34,
extend within double notched spring fingers, 36.
When the tails are within the
upper notch the dog is in engagement with the teeth of the wheel and the rule may
be moved towards the draughtsmau a space at a time. When the tail, 341, of the
dog, 34, is moved down to the lower notch the rule may be moved with perfect
freedom backwards and forwards. Although we show only two it will of course be
understood that any number of wheels may be provided, depending upon the spaces
required for sectional or other work.
Each spacing wheel herein before mentioned is arranged with different width of
teeth, this depending upon the spaces desired for sectional or other work in which
equal spacing is required.
As the rule is being moved forwardly and rearwardly it will be seen that the
cord on each spool will be winding and unwinding and always serve to maintain
such rule in position parallel with the front and rear of the board.
It will be seen from the construction of the table herein before described that it
is extremely simple and cheaply made and has a minimum number of parts to
enable the draughtsman to conveniently, accurately and rapidly accomplish any
desired adjustment for any class of work.
Although in this Specification we describe the cords as of silk it will of course
be understood that they may be made of any other material, such as wire, and that
in lieu of being in cord form they may be bands.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we declare that what
we claim is :-
1. In a drawing table, the combination with the table, A, having a circular
opening, of a removeable circular drawing board a square socket in the centre
of the bottom thereof, a spindle with a square head fitting into the socket, means
for rotating the spindle, and cross bars secured to the underside of the table and
extending beneath the opening and friction rollers journalled in the cross bars and
forming the supports for the board, substantially as described.
2. The combination with a circular drawing board G, the arc shaped clasps, O,
pivoted at, o, on the edge of the board and designed to fit between the bent
retaining pin, o', and the edge of the board over the turned down corner of the
paper as and for the purpose specified.
3. The combination with a drawing table having a circular opening and a
circular drawing board within such opening, of a spindle, h, journalled in the
bars, H, H, extending between the central cross bars, A', A', and having a square
upper end extending into corresponding hole in the plate at the bottom of the
board, a pulley, I, on the spindle, h, guiding pulleys, i, i, on the spindle, ¹,
extending between the cross bars, a chain secured to the pulley, I, and extending
over the guiding pulleys, i, i, the lower end of the chain being connected to the
forward end of the pedals, k, and the cross bar, K, secured to the lower portion of
the standard and extending out each way and having the pedals hinged to it as
and for the purpose specified.

page_text: 4. The combination with the table provided with a circular opening and
circular board supported within the opening with its surface above the level of the
table and provided with a catch, g, in its edge and means for rotating the table,
of stops adjustably held at each side and within the sweep of the catch, the stops
being located at approximately ninety degrees apart, so as to permit of a
ninety degrees swing to the board as and for the purpose specified.
5. The combination with a table provided with a circular opening, and a circular
board supported within the opening with its surface above the level of the table an.
provided with a catch, 9, in its edge and means for rotating the table, of the pivoted
stops, L, adjustably held at each side and within the sweep of the catch, the stops
being located at approximately ninety degrees apart and screw pins, 1, extending
through blocks, 1, provided to adjust the stops to a nicety as and for the purpose
specified.
6. The combination with a drawing table having a circular opening, a circular
drawing board having the surface extending above the table, and a pivoted spring
clamp secured at the rear of the table and having its free end extending over the
board, a screw pin extending from the top of the table through the clamp and a
pressure knob screwed upon the screw pin above the clamp as and for the purpose
specified.
7. The combination with the table, A, provided with cross bars and pivotally
supported upon the spindle, B, having bearings beneath the cross bar upon the
upper enlarged end of the vertical single standard, C, the standards, D, D,
having cross bars, D', through which the standard, C, extends, the bracket d',
forming part of the cross bar, D', the bracket, c, forming part of the standard, C,
the screw spindle secured to the bracket, D', and extending through the bracket, c,
and provided with a hand wheel as and for the purpose specified.
8. The combination with the table, A, provided with cross bars and pivotally
supported upon the spindle, B, having bearings beneath the cross bar upon the
upper enlarged end of the vertical single standard, C, the double standard, D,
supporting the single standards in the cross bars, D', extending between them
the slotted stays, F, pivotally connected to the cross bars, A', and secured to the
standard D, D, by the thumb screw, d, d, extending through the slots as and for
the purpose specified.
9. The combination with the table, A, having the raised ends, A³, and, A³, and
a circular opening, a, and circular board, G, rotatably supported within the opening
and having its surface flush with the surface of its raised ends, of the rule, P,
extending across the board and raised ends and connected at both ends to cords
by depending blocks and means whereby the cords are given a uniformity of
movement, so as to keep the rule when being moved parallel to the rear and front
of the table as and for the purpose specified.
10. The combination with the table, A, having the raised ends, A³, and, A, and
a circular opening, a, and circular board, G, rotatably supported within the
openings and having its surface flush with the surface of the raised ends, of
the rule, P, extending across the board and raised ends and connected at both
ends to cords by depending blocks, the cords being endless and extending around
front and rear pulleys, r, and, r', and wound around central pulleys, which
are secured at each end to the common spindle, B', as and for the purpose
specified.
11. The combination with the table, A, with raised ends, A³, and, A³, and
having a circular opening provided with a circular board rotatably supported and
suitably secured therein and having the surface flush with the raised ends, of
the rule, P, and the scale, Aº, held securely within the longitudinal recess, a',
in any definite position by the adjusting screw, a, as and for the purpose
specified.
an
12. The combination with the table, A, with raised ends, A³, and, A,
having a circular opening provided with a circular board rotatably supported an
secured therein, and having the surface flush with the raised ends, of tho
B

page_text: rule, P, rotatable bar journalled in the recess, a³, and provided with longitudinal
ratchet-shaped notched strips and grooves longitudinally arranged, a catch
tooth, p, depending from the rule and designed to engage with a notched strip
of the bar when underneath the tooth as and for the purpose specified.
13. The combination with the table, A, with raised ends, A³, and, A³, and
having a circular opening provided with a circular board rotatably supported
and secured therein, and having the surface flush with the raised ends, of the
rule, P, rotatable bar journalled in the recess, a³, and provided with longitudinal
ratchet-shaped notched strips and grooves longitudinally arranged, a catch
tooth, p, depending from the rule, the scale marked collar, s', on the supporting
spindle, s, the pointer, S¹, knob, s, toothed wheel, s³, and, dog, st, all arranged as
and for the purpose specified.
14. In a drawing table in combination a circular drawing board rotatably
supported having a pointer on the edge of the board and a protractor arranged
around half of the circumferential edge of the board, suitably divided and indexed
from nought to ninety from the centre outwardly to each end, a spring clamp for
holding the board in any desired position, and a rule arranged to have a parallel
movement to a straight line between the ends of the protractor as and for the
purpose specified.
15. In a drawing table in combination a circular drawing board rotatably
supported having a pointer on the edge of the board and a protractor arranged
around half of the circumferential edge of the board, suitably divided and indexed
from nought to ninety from the centre outwardly to each end, a spring clamp for
holding the board in any desired position, and a rule arranged to have a parallel
movement to a straight line between the ends of the protractor as and for the
purpose specified.
16. The combination with the table A having a circular opening and a circular
drawing board rotatably supported within the opening and stop brackets secured to
the edge at ninety degrees apart of a pivoted spring catch secured to the table
at the edge of the opening and provided with a notch as and for the purpose
specified.
17. The combination with the table A having a circular opening and a circular
drawing beard rotatably supported within the opening and stop brackets secured
to the edge at ninety degrees apart of the pivoted catch 6 provided with a notch 7,
slot 11, screw pin 13, co-acting spring 10, all arranged as and for the purpose
specified.
18. The combination with a circular drawing board rotatably secured within the
circular opening in the table and means for holding the same in any desired
position, of a rule provided with a roller extending through a longitudinal opening
in the rule and having end spools, and cords passing from front to rear of the table
fastened to the spools partially wound thereon, and co-acting as shown and for the
purpose specified.
19. The combination with the table having a circular opening, a circular drawing
board rotatably supported within such opening above the level of the table, end
guide bars at each side of the table substantially flush with the board and a rule
supported upon the guide bars and having depending blocks from the end thereof
with pins extending into side grooves in the outer edge of the guide bars, of a
roller journaled above and extending through a longitudinal opening in the
rule and having end spools with co-acting cords all arranged as and for the purpose
specified.
20. In combination with the circular drawing board rotatably supported within a
circular opening in the table and a rule provided with a roller and end spools, of a
cord passing from the nuts 25 through a hole 26, groove 27, hole 28 on each side
of the table to the front groove, nuts 25 in which the rear ends of the cord are
fastened and screw knobs for adjusting the nuts 25 within the slots 31 as and for
the purpose specified.
21. The combination with the drawing board of a rule arranged to move

page_text: parallelly across the board, a roller journalled in the top of the rule and extending
through a longitudinal opening in the same, spacing wheels secured in the end of
the roller, and dogs arranged to co-act with the spacing wheels as and for the
purpose specified.
22. The combination with the drawing board of a rule arranged to move.
parallelly with the board a roller journalled in the top of the rule and extending
through a longitudinal opening in the same, spacing wheels secured in the end of
the roller and dogs suitably pivoted and having forwardly extending tails
adjustable within double notched spring fingers secured to the rule as and for the
purpose specified.
23. The combination with the drawing board, of a roller arranged to move
parallelly across the board and having end spools, a cord passing from front to rear
of the table at each side, intermediately fastened to the spools and partially wound
thereon as and for the purpose specified.
Dated the 7th day of November 1895
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicants..