Im- PROVEMENTS IN ENGRAVING AND CHASING ARTICLES OF METAL
Year: 1869

page_text: LETTERS PATENT to Thomas Lippiatt, of Orange, in the State of
New Jersey, United States of America, for the Invention of "Im-
PROVEMENTS IN ENGRAVING AND CHASING ARTICLES OF METAL."
Sealed the 18th September 1869, and dated the 31st March 1869.
PROVISIONAL SPECIFICATION left by the said Thomas Lippiatt at
the Office of the Commissioners of Patents, with his Petition, on
the 31st March 1869.
I, THOMAS LIPPIATT, of Orange, in the State of New Jersey, United
States of America, do hereby declare the nature of the said Invention for
"IMPROVEMENTS IN ENGRAVING AND CHASING ARTICLES OF METAL," to be as
follows:-
These improvements are an addition to the engraving engine known
as the "Rose Engine Lathe," in which the article to be engraved is
revolved, and the tool is moved by a connection to a revolving pattern
so as to engrave or leave the surface plain.

page_text: My features of improvement are as follows:-I provide a sliding
follower, which carries an arm that projects into contact with the surface
to be engraved; a spring keeps this follower to the surface. Upon the
said follower is a tool holder fitted to slide or swing, the engraving tool
of which is contiguous to the point where the arm of the follower comes
against the surface to be engraved. This tool holder is acted upon by a
lever fulcrum on the follower, one arm of which lever is in contact with
one arm of a second lever that is acted upon by the raised or sunk
pattern as it revolves, so that the engraving tool will be projected or
withdrawn according to the pattern, regardless of inequalities in the
surface of the article that is being engraved moving the follower and
tools, thus allowing for engraving articles that are not of a regular
shape.
In order to make the engraving a series of small dots or deeper
incisions I employ a "chatter motion," which consists of a revolving
ratchet wheel that acts on a bent lever connected with the tool holder, so
as to give a constant vibration to the tool holder and tool whether
cutting or not cutting; hence when the pattern causes or allows the tool
to take the surface to be engraved the said engraving is dotted, as afore-
said, instead of being a continuous line. This chatter motion may be
disconnected when not required.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Thomas Lippiatt in the Great Seal Patent
Office on the 29th September 1869.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, THOMAS 2
LIPPIATT, of Orange, in the State of New Jersey, United States of
America, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Thirty-first day of March, in the year
of our Lord One thousand eight hundred and sixty-nine, in the thirty- 3
second year of Her reign, did, for Herself, Her heirs and successors,
give and grant unto me, the said Thomas Lippiatt, Her special
licence that I, the said Thomas Lippiatt, my executors, adminis-
trators, and assigns, or such others as I, the said Thomas Lippiatt,

page_text: my executors, administrators, and assigns, should at any time agree with,
and no others, from time to time and at all times thereafter during the
term therein expressed, should and lawfully might make, use, exercise,
and vend, within the United Kingdom of Great Britain and Ireland, the
Channel Islands, and Isle of Man, an Invention of "IMPROVEMENTS IN
ENGRAVING AND CHASING ARTICLES OF METAL," upon the condition (amongst
others) that I, the said Thomas Lippiatt, my executors or administrators,
by an instrument in writing under my, or their, or one of their hands
and seals, should particularly describe and ascertain the nature of the
said Invention, and in what manner the same was to be performed,
and cause the same to be filed in the Great Seal Patent Office within
six calendar months next and immediately after the date of the said
Letters Patent.
NOW KNOW YE, that I, the said Thomas Lippiatt, do hereby
declare the nature of my said Invention, and in what manner the
same is to be performed, to be particularly described and ascertained
in and by the following statement, reference being made to the Draw-
ings hereunto annexed, and to the letters and figures marked thereon
(that is to say):
:-
Fig. 1 is a general plan of the machine;
دو
2 is an elevation of the mandrel head of the engine or machine
and the gearing connected therewith;
Fig. 3 is an elevation of the slides and beds that carry the tool as seen
from the end where the tool is carried;
Fig. 4 is an elevation of the last-named parts from the opposite ends
of said beds and slides, part of the pattern shaft being in
section; and
Fig. 5 is a vertical section of said slides and beds transversely of the
pattern shaft. The other Figures are separately referred to,
and similar marks of reference denote the same parts.
This Invention relates to the machine usually known as the Rose
Engine Lathe for engraving silver ware and other articles of metal. The
article to be engraved is rotated and the tool pressed towards or with-
drawn from the surface by means of a raised pattern revolved at the
same time as the surface to be engraved.
My Invention relates to peculiarities in the construction of the

page_text: In the Drawings a¹ represents the heads or frame carrying the
mandrel b c is the main bed of the machine supporting the heads a',
and extending forwards in the form of slides c¹ for receiving the main
sliding rest or bed plate d that carries the parts that operate upon the
tool; this plate d¹ may be moved nearer to or further from the mandrel b
as required by the article operated upon, and for this purpose a screw 6°
is employed. The mandrel 6' carries a face plate d³, Fig. 1, and shown
by dotted lines in Fig. 2. Upon this face plate the article to be
engraved is attached; or in place of a face plate a chuck or other holder
may be substituted. The cone of pulleys es, pinion e¹, and gear e are
employed for rotating the mandrel 61, and I take motion from the
wheel to the pattern shaft f¹ through the gear wheelf on an arm 2
that allows for changing the wheel f* and varying the relative revolu-
tions by a larger or smaller wheelf. From the wheel fa miter gears 3, 3,
and a shaft 4 with a universal joint give motion to another shaft over
head, and thence by the shaft 5 and gears 6, 6, to the shaft f, the shaft
and gearing overhead not being shown. A similar train of shafting and
gearing is employed to communicate motion from the wheel 7 and
pinion 8 to the shaft 9 and gears 10 that move the "chatter wheel"
hereafter referred to. Upon the bed plate d¹ is mounted the column g¹,
the foot of which is slotted, as seen in Figures 5 and 6, and attached by a
bolt to the bed d', so as to allow of the column and parts it carries being
placed in any desired position relatively to the mandrel b', and this is
further facilitated by the frame h³ being mounted upon the center bolt h
that enters the column g¹, and is clamped by a screw 11, Fig. 3, and the
parts are adjusted vertically with accuracy by the screw ring 9'. Upon
the frame h³ the pattern shaft f¹ is mounted, and said shaft f¹ carries the
pattern at k made in a cylindrical form and having the figure to be
engraved sunk into its surface. The pattern is rotated as aforesaid, and
if it is necessary to give end motion to said shaft f¹ and pattern k (in
addition to the movement resulting from the tracer i moving along over
the surface of said pattern as hereafter named) it is effected by the
screw 12 that slides the shaft f¹ endwise through its bearings, and the
miter wheel 6 that is provided with a feather taking the slotted key seat
of the shaft.

page_text: Fig. 7 represents an arm 13 that may receive motion from a cam or
pin on some part of the lathe to act by a pawl 14 on a ratchet wheel
that moves the said screw 12 progressively with regularity as the parts of
the lathe revolve. A similar arm 15 and pawl 16, Fig. 8, is employed to
give a gradual rotation to the screw that operates upon the first slide F
of the tool, holding rests so as to move those and the tool along bodily
upon the slide h³, and make the lines of engraving the proper distance
apart. The slide F and its parts are shown in the detached views, Fig. 9.
The tool o is set upon the slide A, see detached views, Fig. 10, and this
slide A. if fitted to move in the line of the tool between the bars B upon
the second slide C, see Figs. 3 and 10 and 11. This slide C (shown
separately in Fig. 11) is set upon the bed D, that in turn is upon the
secondary bed E, and that rests upon the slide F aforesaid.
The bed D is shown in plan Fig. 12, and side view in Fig. 13, inverted
in Fig. 14, and endwise in Fig. 15. The upper portion of the secondary
bed E and its parts are shown in plan Fig. 16, inverted in Fig. 17, and
in a side view Fig. 18, and Fig. 19 is a plan of the bed D and parts
below it. Upon the bed E are ears carrying the rock shaft 20, with
arms 31, 32, extending each way; one of them 32 carries the tracer i
that is operated on by the pattern k, and the other 31 passes in between
F and E to operate upon the compound lever that has the screw
points 22, Fig. 3, for fulcra, and the upright portion of this lever r acts
against the end of the slide A to draw the tool o out of contact with the
surface being engraved, in order that the engraving may only be
performed at those parts of the pattern k that are cut away. The
slides A and C and tool o are to be pressed forward by a spring or
weight, but an adjustable stop 8, see Fig. 1, limits the movement of
the slide A in the bed C, and from the bed C projects a finger &³, see
Fig. 1, that is adjacent to the tool o, so that the slides C and A may
move in the bed D to accomodate inequalities in the surface being
engraved, but the cutting cannot be other than a uniform depth accord-
ing to the amount that the tool when forward projects beyond the
fingers. In order to accomodate the curvilinear or angular surface of
the article being engraved the slide D is made upon its under surface
with segmental ribs 83, 84, described from the point of the engraving
tool o as a center; these set into or upon the surface of the secondary
bed E, and the segmental edge &* of this slide D is operated upon by a
worm pinion ts, see Figs. 1 and 19, so as to set and hold said slide
P at

page_text: a
an angle to the secondary bed E. The compound lever r is formed with
joint at t, see Fig. 5, so that the fulcra and upper portion may turn
with the bed C while the horizontal portion extends to the tracer
lever 31.
In some characters of engraving the line that is cut to form the
groundwork around the figure or to form the figure itself is made of a
series of dots instead of a full line, and I arrange to give the tool a
rapid forward and back vibration without interfering with the action of
the aforesaid parts in producing the pattern. This movement to the
tool is given by the chatter wheel 40 that is formed with a series of teeth
or cams, and driven at a greater or less speed by the gearing 10 afore-
said. This chatter wheel 40 acts upon a lever u, see Figs. 1, 4, and 20,
and by a pusher 37 operates upon the lever r to give the same a
vibrating movement to operate upon the slide A and tool to give the
same a forward and backward movement. This lever u has a joint
near the middle, so as to allow it to be turned aside from the chatter
wheel 40 instead of requiring to stop the said wheel 40.
By this
construction the engraving of various flat, cylindrical, or circular articles
is placed entirely within the easy control of the attendant, and the
pattern will be produced in fac-simile or more or less elongated in either
direction according to the relative sizes or speeds of the parts.
The slide A forming the tool holder might be made in the form of a
hanging clamp between standards on the bed C, so as to swing instead of
slide, and the chatter wheel 40 might be located in some other portion of
the slides or beds.
What I claim and desire to secure by Letters Patent is,-
First. The beds and slides C, D, E, and tool holder A constructed and
arranged substantially as set forth in combination with the pattern
wheel and lever 7, substantially as described.
Second. The finger & extending from the slide C in combination with
the tool holder A, tool o, and adjustable stop 8, substantially as and for
the purposes set forth.
Third. The chatter wheel 40 and lever in combination with the tool
holder A and lever r, substantially as set forth.
Fourth. The compound lever r formed with the joint and hung on
the centers 22 in combination with the pattern k and tool holder A,
substantially as set forth.

page_text: Fifth. The pattern shaft f' and screw 12 in combination with the tool
holding slides and the screw l, the parts being actuated substantially as
set forth so as to vary the engraving from the same pattern, substantially
as set forth.
In witness whereof, I, the said Thomas Lippiatt, have hereunto
set my hand and seal, this Third day of September, A.D. One
thousand eight hundred and sixty-nine.
Witnesses,
CHA. H. SMITH,
121, Nassau St., New York, N.Y.
GEO. D. WALKER,
121, Nassau St., New York, N.Y.
THOB. LIPPIATT. (L.S.)