IMPROVEMENTS IN TOOL HOLDERS FOR MACHINE TOOLS
Year: 1872

page_text: LETTERS PATENT to Henri Adrien Bonneville, of the British and
Foreign Patent Offices, 18, Rue de la Chaussee d'Antin, Paris,
France, and 6, Piccadilly, in the County of Middlesex, Patent
Agent, for the Invention of "IMPROVEMENTS IN TOOL HOLDERS FOR
MACHINE TOOLS."-A communication from Edmond Baville, residing
at Passy, France, Machinist.
COMPLETE SPECIFICATION filed by the said Henri Adrien Bonneville
at the Office of the Commissioners of Patents, with his Petition
and Declaration, on the 5th September 1872, pursuant to the 9th
Section of the Patent Law Amendment Act, 1852.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, HENRI
ADRIEN BONNEVILLE, of the British and Foreign Patent Offices, 18,
Rue de la Chaussée d'Antin, Paris, France, and 6, Piccadilly, in the
County of Middlesex, Patent Agent, send greeting.
WHEREAS I am in possession of an Invention for "IMPROVEMENTS IN
TOOL HOLDERS FOR MACHINES TOOLS," communicated to me by Edmond

page_text: it is firmly held by the spring catch piece H, which is fixed to the
piece A, B, C, by means of a bolt J, J. The cylinder D, D, is provided
exteriorly with semi-conical notches a, a, a, a, shown in Fig. 2 and 3.
When the screw H is tightened these notches hold rigidly in place
the cylinder D, D, which may evidently by loosening the screw be
turned to the right or to the left, and displaced to a greater or less
extent according to the number of notches. The tool K being placed
in this moveable cylinder, an equal number of different positions may
be obtained. The tool K is made of special superficial forms, shown in
Fig. 1 and 3, and should as far as possible be made of steel, and rolled
directly into the said forms. L, L, L, L, M, Fig. 3, 4, and 5, represent
the piece in which the tool K is held, and which is cut at M in angular
form in order to be held more firmly by the screw N pressing on the
wedge O. The axis P allows the tool to recede when the machine with-
draws it after each stroke forward, backward, upward, or downward.
The spiral spring R bearing on the right hand of the piece L presses
the different parts constantly together.
It will readily seen that if the tool K should be placed in a vertical
position in the holder its length should, must be, regulated, and for this
purpose a circular hollowed opening is formed in the holder at Q, Fig. 3
and 4.
The arrangement above described allows the most varied displacing of
the tool while holding it firmly and rigidly.
Fig. 6, 7, and 8 show a second arrangement of the holder consisting
of a metal rod S, S, of a square or rectangular shape. At its lower part
slides a triangular or square rod T, T,' the head of which forms a catch
piece, and which is held in position by an adjusting screw V, V.
X shows the tool held in a cylindrical piece Y, Y, terminated by a bolt
head pressed by the screw nut Z. The front part A¹ is formed with a
flange, and provided with notches, as in Fig. 2. The screw B₁ holds.
the cylindrical piece Y, Y, in its place by entering into one of the said
notches. The tool is held by the screw C¹ pressing on the wedge b.
The piece T, T, is made with a curved opening at D₁ to permit the
passage of the tool when the latter is placed therein.
Fig. 9, 10, 11, 12, and 13 show a third arrangement of the holder
consisting of two symmetrical parts E¹, F', placed in juxtaposition
according to the central line, and fixed firmly together by the bolts G', H¹,

page_text: and the clamped plate I', I', which is held in place by the screw J'.
K¹ is the tool held in the round piece L', M', N', which is inserted
between the two jaws E¹, F', the tool being tightened by the adjusting
screw O¹ and wedge P¹ at Q', see Fig. 10 and 13; the piece L', M³, N¹,
is notched in the same manner as the plate I, 1; thus holding the
piece L, M, N', and the tool firmly in immoveable position.
When it is wished to change the position of the tool the screw J' is
loosened, and the spring R' then moves away the plate I', I', the notches
of which being disengaged from those of the piece L', M³, N¹, and the
tool may be turned right or left.
This arrangement may be advantageously used for shaping cylindrical
work, as shown in Fig. 13 by the circular line.
Fig. 14, 15, 16, and 17 show a fourth arrangement of the tool holder
consisting of a metal bar, having an octagonal form at one end and
provided with an opening shown in section, Fig. 16, also of octagonal
form at T and conical at U¹ intended to receive a piece of a similar
shape V¹, X, Z', provided at U with an opening A¹ to receive the tool
of perfectly identical shape, which is held therein by the round headed
screw B³, C², entering the worm of the piece V₁, X¹, Z'. In order to
change the position of the tool this screw is loosened, the piece V', X', Z',
is drawn back in order to disengage it from the octagonal piece T¹ and
placed in any new angle required. The means of drawing back the
tool are shown in Fig. 17, and consists in the addition of the piece
D, E, F, and the use of a longer screw G³, the remaining parts being
unchanged.
Fig. 18, 19, 20, show a fifth arrangement of the tool holder consisting
of a metal thin plate H³, enlarged at its bottom I2 and hollowed out at
the part H² so as to form a hollow to receive the tool J' which slides up
and down and is held by the adjusting screw K² and wedge L².
Fig. 21 and 22 show a tool holder nearly similar used for a tool of
round section M' as in the former case, the rod N' is hollowed out at
the back and enlarged at the bottom. A wedge O* cut in the shape of
an open angle and notched in its whole height holds rigidly in position
the tool M when tightened by the screw P. With the tool holders
Fig. 18 and 21 the auxiliary holders shown Fig. 23, 24, 25, and 26,
28 and 27, 29, may be used.

page_text: Fig. 23 shows a rod Q of conical, cylindrical, or rectangular shape,
pierced obliquely at its extremity to receive the tool c, c, held in place
by adjusting screw d. The rod Q if made of the same shape as the
tool J is placed on the piece Fig. 18, and on the piece Fig. 21 if
of cylindrical shape. The tool c, c, in this case is used instead of the
tools J or M².
In Fig. 26 and 28 the tool e, e, is made of a conical shape at the top and
is placed in the conical piece R³. The tightening is effected by means
of two screws S², T*. The piece R² like the preceding one takes place.
of the tool J or M² and the tool e works.
Fig. 27 and 29 show an arrangement nearly similar to the preceding,
but with a tool U2 of square section uniform throughout its length,
tightened by the screws V2, X2, and the piece is intended to take the
place of J or M' according to the requirements of its shape.
Fig. 30, 31, and 32, show another arrangement of tool holder with a
flat tool; Y, Z, is a metal rod enlarged at its extremity on the right
and hollowed out on the left to receive the tool A³, A³, which is held in
a piece B, C, D³, the face of which is of an octagonal shape, and its
part C and D has the form of a screw bolt. A screw nut E³; F³,
tightens it against the piece Y, Z, and the screws G³ and H³ hold the
tool A³, A³, in position. In order to change the position of the tool
right or left the screw nut E³, F³, is loosened, the piece B³, E³, C³, D³, is
drawn back and turned right or left in order to place it opposite the
next surface, then the screw nut is again tightened and the tool is held
in position.
Fig. 33, 34, 35, 36, and 37 show another arrangement of tool holder,
with which the pieces 23, 26, and 27, or the tool G³ may also be used.
This arrangement consists of a piece H³ hollowed out at its inside
as in the cone I³, J³, and having a flange K³, L³; M³, N³, O³, is the
piece which holds the tool G³. The conical part N fits exactly into
the corresponding part of H³, and a catch piece P³, Q³, R³, holds the
piece M³, N³, O³, in position by means of the spiral springs S³, T³. The
lower part of the flange K³, L³, is cut with vertical teeth, the form of
which is shown in plan Fig. 35 and in elevation Fig. 33 by dotted lines.
The corresponding part of M³, N, O, is shown in Fig. 37, and is made
with two teeth U³, V³, which enter two corresponding hollow in theeth
of the piece Fig. 35. The tool G³ may be shifted at will by placing

page_text: '
it between other teeth and is held in position by the screws X³, Y³.
Fig. 33 shows how it is held in the piece. The catch piece is held
loosely by the screws A*, B*, passing through ovalised openings which
allow them a certain amount of play upwards. This arrangement is
used in order to allow the tool when raised to disengage itself by friction
and avoid a too violent contact with the surface of the piece to be
worked. The friction suffices when the tool rises to disengage the
conical piece N³, press back the springs, and consequently attenuates a
part of the resistance opposed to the return stroke.
Fig. 38 & 39 show an arrangement for the tool known as a spring
plane, and consists of a single steel rod C', D', having an octagonal
opening in which enter the end of the piece supporting the tool holder
F, G, H. This end I', J', is made with a screw thread to receive the
screw nut K, L, which holds it in position; M' is the tool held by the
screw N.
Its position is altered by loosening the screw nut K*, L*,
and placing the octagonal piece I' in different positions.
Fig. 40, 41, and 42 show an arrangement of tool holder with hinged
movement, and consisting of a piece N, O, P', connected with another
piece Q, R, S, held in place by the axis U on which it can be
oscillate. The piece Q, R, S, is made of octagonal shape at V* and
fits exactly into a similar part of the piece X*. The piece Q, R, S,
is held in position by the screw Y'; Z' is the tool held by the
wedge T. The axis U and the spring A³ allows the oscillating
movement when the tool Z' rises after doing its work. The arrange-
ment of the octagonal piece V* allows eight changes in the position of
the tool.
I have thus described the different arrangements, forms, and com-
binations of the improved system of holders, which I need hardly say
form a single Invention, the modifications of which are made for the
purpose of adapting the tool to different classes of work and are more
or less advantageous. In the greater number of cases I have referred
to octagonal, sexagonal, or notched holders for the purpose of changing
'the positions of the tool, but I reserve the right to increase or diminish
the number of sides or notches in order to vary to a still greater extent
the position of the tool, and also to use the metal I considere most a
suitable and give different shapes to the various parts without departing
from the principle of the said Invention, and what I claim and desire

page_text: to secure by Royal Letters Patent is, the general combination and
arrangement of the whole system of tool holders and accessory parts
for use in machine tools, substantially as above described and represented
in the accompanying Drawings.
In witness whereof, I, the said Henry Adrien Bonneville, hereto set
my hand and seal, this Thirty-first day of August, in the year of
our Lord One thousand eight hundred and seventy-two.