CERTAIN IMPROVE- MENTS IN DRAWING COMPASSES OR DIVIDERS AND THEIR MANUFACTURE
Year: 1884

page_text: COMPLETE SPECIFICATION.
"
I, LEOPOLD MYERS, of 25, Albany Street, London, Middlesex, Mechanical
Engineer, do hereby declare the nature of my invention for "CERTAIN IMPROVE-
MENTS IN DRAWING COMPASSES OR DIVIDERS AND THEIR MANUFACTURE and in
what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement:—
My Invention consists firstly in the manufacture of drawing compasses or
dividers from sheet metal bent into a U shaped, V shaped or semi-circular cross
section; and secondly in the configuration and combination of their sheet metal
parts as hereinafter fully described and illustrated in the accompanying sheets of
drawings.
The object of my Invention is to render drawing compasses or dividers more
portable and to produce them at a lower cost than heretofore.
I will describe, with reference to the accompanying drawings, the manner in
which any Invention may be performed; the same letters of reference indicating
the same parts in the several Figures.
Figuro 1 represents a form of compasses made from iron, steel or other suitable
sheet metal according to my Invention; Figure 2 is a view of the same closed;
Figure 3 is a side view of Figuro 2; Figures 4 and 5 shew the limbs A and B in
detail, from which it will be seen that each limb consists of a single piece of sheet
metal of the shapes shown at Figures 6 and 7 the same being bent into a U shaped
or semi-circular form in cross section and one end of each forming a fork and being
provided with holes a, b, the other end of A is pointed and the other end of B is
forined as a socket to take a point, pan or pencil. The said jointed ends interlock
and are secured together by an ordinary eyelet D or by a rivet or screw,
A washer C, Figure 8, is provided between the said forked ends to keep them
apart. When the said compasses are closed, as shown in Figures 2 and 3, the
socket limb B folds within the pointed limb A.
Figure 9 shews a form of ruling pen and pencil holder made from sheet metal to
fit the socket ends of iny Improved compasses, and Figure 10 shews the blank from
which it is formed, the screw regulates the points g¹ and g in the ordinary
manner. I sometimes make the socket end of the said ruling pen pointed as shewn
in Figures 9 and 10°.
Figure 11 shews a pencil holder forming therewith a point and pencil; Figure 12
shews a pen holder and point; and Figure 13 (forming no part of my Invention)
shews an ordinary pen holder carrying a pen and pencil all of sheet metal and for
use with the socket ends of my compasses as described and illustrated.
Figure 14 is a view open; Figure 15 a view closed, and Figure 16 a side-view of
Figure 15 of a drawing compass made of sheet metal according to my lavention,

page_text: having knee joints so that, if desired, the compass may be folded for the pocket.
Figures 17, 19 and 21 shew the limbs in detail and Figures 18, 20 and 22 the
sheet metal blanks from which they are formed. Figure 19* shews the washer C'
used for the knee joints which interlock and are secured, by eyelets D', D³ or by
rivets or screws. The socket limb B¹ takes a pen, point or pencil.
Figure 23 is a view open and Figure 24 a view closed of a forin of dividers mado
of sheet metal according to my Invention.
Figure 25 is a view open and Figure 26 a view closed of a modification of the
drawing compass shewn and described with reference to Figures 14, 15 and 16. It
has two socket limbs to take a point and pencil holder F, and a point or pen
holder F so as to serve the purposes of dividers and compasses for ink or pencil.
Figures 28, 29 and 30 shew a combination of the dividers and compass shewn
nnd described with reference to Figures 23, 24, 25 and 26.
Figures 31 to 39, both inclusive, shew a form of combination pillar compass
made from sheet metal and arranged to fold for the pocket. The limbs B° and Be
are each formed with a socket and a forked end, and to fit each of the said socket
ends I provide a small compass as shown in detail in Figure 34; tubular
lengthening bars O, Figure 35, may be used and made to fit on to the limbs
of the said small compasses as shewn in Figures 33 and 36. This combination
pillar compass may be used as shown in Figuro 31 as dividers or compasses for pen
or pencil and the limbs may be lengthened by the use of the said tubular
lengthening bars 0 as shewn in Figure 36; the end O' of the said lengthening
bars being reduced as shewn to fit the socket ends of tho limbs B and B
Figure 37 shews the form of sheet metal blank for the limbs B° and B10; Figure 38
shews the form of sheet metal blank for the pointed limbs A5, A6, of the said small
compasses and Figure 39 shews the form of sheet metal blank for the socket
limbs B, B, of the said small compasses. The said limbs of the small compasses
are forked at one end and jointed as herein before described with reference to the
larger ones but at the jointed end I provide the piece M, as shewn in detail in
Figures 40 and 41, for convenience of holding by the fingers. In the same manner
I sometimes use the piece M for the larger compasses as herein described.
Figure 42 is a view open of another form of combination compasses and dividers
made of sheet metal according to my Invention; Figure 43 is a sido view of the
same and Figure 44 is a view of the same closed. It can be used either as dividers
or compasses for pen or pencil. Figure 49 shews the washer for the bottom
joint . Figure 45 shews the blank for the limbs H³ and H; Figure 46 shews
that for H and H"; Figure 47 shews the blank for the pointed limbs A³ and A
and Figure 48 shews the blank for the socket limbs B and B'. The said sheet
metal blanks are bent into a U shaped form and jointed together by eyelets, rivets
or screws as hereinbefore described with reference to the other forms of compasses
and dividers.
Figure 50 is a view open of another form of combination compasses and dividers
made of sheet metal according to my Invention; Figure 51 is a side view of tho
same and Figure 52 is a view of the same closed. It can be used either as dividers
or compasses for pen or pencil. Figure 53 shews the socket limbs B and B', and
the blank for forming the same; Figure 54 shews the combination pointed and
socket limb F and F and the blank for forming the same; Figure 55 shews the
socket limb B' and B³ and the blank for forming the same.
The said sheet metal
blanks are bent into a U shaped or socketted form and jointed by eyelets, rivets or
screws as herein before described with reference to the other forms of compasses and
dividers.
Figures 56, 57 and 58 shew a method of making the pointed ends of the limbs of
my Improved compasses. Figure 57 shews part of the blank which is closed round
a point preferably of steel by means of suitable press tools.
I prefer to strengthen the said pointed ends of my compasses or dividers by
making them of a triangular cross section as shewn in section on line p. p
Figure 27* by means of suitable press tools as will be readily understood, -
-

page_text: The sheet metal limbs of my Improved compasses or dividers may all be cut out
and bent and the parts put together by means of suitable press tools as will bo
readily understood.
I wish it to be understood that I do not limit myself to the precise details as
herein described and illustrated as the saine may be varied without departing from
the nature of my Invention.
Having now particularly described and ascertained the nature of my said
Invention, and in what manner the same is to be performed, I declare that what
I claim is:
1. The application and use of sheet metal to the socket limbs of compasses or
dividers, that is to say, making such limbs as B, B¹, B³, B³, Bª, B³, Bº, B³, B³, Bº
B¹º, B, B, each of a single piece of sheet metal bent as described and illustrated.
2. The application and use of sheet metal to the double forked limbs of compasses
or dividers, that is to say, making such limbs as H³, H³, H³, Hª, H³, Hº, each of a
single piece of sheet metal bent as described and illustrated.
3. A jointed limb forming a socket and a point made of sheet metal as F³, F³, as
described and illustrated.
4. The application and use of a metal eyelet for forming the joints of the limbs
of sheet metal compassos or dividers as described and illustrated.
5. The construction and combination of the parts of a drawing compass or
dividers made of sheet metal as described and illustrated with reference to
Figures 1 to 7, both inclusive.
6. The construction, combination and configuration of the parts of a drawing
compass or dividers made of sheet metal as described and illustrated with reference
to Figures 14 to 22, both inclusive.
7. The construction, combination and configuration of the parts of dividers made
of sheet metal as described and illustrated with reference to Figures 23 and 24.
8. The construction, combination and configuration of the parts of a drawing
compass or dividers made of sheet metal as described and illustrated with reference
to Figures 25 and 26.
9. The construction, combination and configuration of the parts of a drawing
compass or dividers made of sheet metal as described and illustrated with reference
to Figures 28, 29 and 30.
10. The construction, combination and configuration of the parts of a drawing
compass or dividers made of sheet metal as described and illustrated with referenco
to Figures 31 to 41, both inclusive.
11. The construction, combination and configuration of the parts of a drawing
compass or dividers taade of sheet metal as described and illustrated with reference
to Figures 42 to 49, both inclusive.
12. The construction, combination and configuration of the parts of a drawing
compass or dividers made of sheet metal as described and illustrated with referenco
to Figures 50 to 55, both inclusive.
13. The improvement in the points of compasses or dividers made of sheet metal,
that is to say, making them of hollow triangular cross section as described and
illustrated with reference to Figures 27 and 27*.