Improvements in Apparatus for Engraving.
Year: 1893

page_text: Date of Application, 8th July, 1893-Accepted, 12th Aug., 1893
COMPLETE SPECIFICATION.
Improvements in Apparatus for Engraving.
We JOHANNES WELCHER Engineer and CARL MEYER, Engineer, both of
88 Hunde Strasse Lubeck, Germany, 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 :—
This invention relates to an instrument or apparatus with which circular as well
as rectilineal engravings can be made in wood or other materials and with which
the most different formations in suitable combinations can be produced on the
plane to be engraved.
The instrument or apparatus consists chiefly of two parts: one for the production
of rectilineal, the other for the production of circular lines.
In the accompanying drawing
Fig. 1 is a plan view of the metal bar a provided with a designing piece and
Fig. 2 is a side view of the same.
Figs. 3 and 4 are elevation and plan of a holder for the engraving needle or
tool.
Fig. 5 shows a pattern which can be engraved with this instrument.
The apparatus is used in the following manner :-
The design to be engraved is first drawn on a rectangular smooth plane. The
engraving of the straight lines is done by pressing the needle holder e which is
removable on the metal bar so that the needle or tool c¹ touches and cuts into the
lines drawn on the plane. The needle c¹ is fastened in the needle holder transversely
to the long axis of the metal bar. By adjusting the designing piece at right
angles to the bar a and by running the piece balong the outer edge of the plane
the needle c will produce a straight line parallel to the side of the plane and at a
distance therefrom to according the adjustment of the needle holder on the bar a.
The engraving of circular lines is also done by means of the needle-holder e but
the designing piece is entirely removed from the bar a by loosening the nut bat
the other end of the metal bar a a spike k with a sharp point and provided with a
handle is put in and fastened to the bar a by means of a thumb screw. Then
the spike is placed on a certain point in the plane and circular lines can now be .
drawn around this point as a centre with the needle on the plane. The engraving
of transverse or of diagonal or inclined lines is done by screwing the designing
piece b, which consists of two parts, again to the metal bar a at any desired angle
thereto as shewn by the dotted lines in Figs. 1 and 2 by means of the winged
nut . The needle holder d removable on the metal bar a serves to guide the
needle d¹ parallel to the long axis of the metal bar (see Figs. 1 & 2). Through
the moving of the needle-holder d a diagonal line can be cut on the plane and
several of the.n can be drawn parallel to each other by moving the piece along
the edge of the plane. To obtain a stop to the movement of the needle-holder d
and at the same time to fix the metal bar a for a time, for the purpose of making
a straight line a stop piece fmovable on the metal bar a is provided and furnished
with a thumb screw by means of which it can be fixed at any desired part of the
metal bar, on its lower side it is provided with a sharp point or spike. The metal
bar a has on its upper side a measuring scale (see Fig. 1) by means of which the
lines can be cut always exactly to the distances desired.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what Ị
claim is :-
1. Apparatus for engraving, comprising a bar a with divisions therein to form
a rule which carries at one end a fixed or movable designing head and needle or

page_text: tool-holders (c & d), which can be moved along the aforesaid rule a so that straight
lines either parallel or transverse to the long axis of the rule can be drawn by the
engraving needles or tools carried by said holders substantially as described and
illustrated.
2. In combination with the apparatus described in Claim 1 the spike k fitted to
the rule a for the purpose of obtaining a fixed turning point so that circular lines
can be engraved by means of a needle or tool fixed into the holder c substantially
as described and illustrated.
3. In combination with the apparatus described in Claim 1 the stop piece f
which is movable or on the rule a to form a stop to the movement of the needle-
holder d along the rule a substantially as described and illustrated.
Dated this 8th day of July 1893.
F. W. GOLBY,
36, Chancery Lane, London, W.C., Patent Agent for the Applicants.