Chucks or Tool Holders.
Year: 1890

page_text: Date of Application, 12th Feb., 1890-Accepted, 22nd Mar., 1890
COMPLETE SPECIFICATION.
Chucks or Tool Holders.
HENRY ROSE, Ridgemont Road, St. Albans Herts. Brush Manufacturer WILLIAM
ROSE, Ridgemont Road, St. Albans, Herts. Brush Manufacturer, GEORGE ROSE Ridge-
mont Road St. Albans Herts. Brush Manufacturer, JOHN HENRY GODMAN, West View
Road St. Albans Herts. Engineer 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 :-
1. Our Invention consists in casting or fixing upon the drill or tool a Chucker
Holder "hereinafter called Chucks" more particularly for the purpose of holding
drills or bits for brushmakers of metal or composition in a mould for that purpose, the
drills or tools being held perfectly true thereto, the mould being an exact counter-
part of the mandril or cavity by which the chuck is to be held in or upon.
2. The chucks may be of a fuseable metal alloy or composition a suitable alloy for
general purposes being six parts of lead and one part antimony and substantially of
the form hereinafter described.
3. A mould for casting or forming the chucks hereinafter described.
4. An extractor or lever for removing the chucks from the mandril or other means
of rotation fixture or controll while in motion or at rest, after the manner hereinafter
described & set forth.
5. The chuck Fig. 1 consists principally of the body A, the shoulder B, and the
shank C, the body to contain the part of the tool to be held, the shoulder for the
purpose of removing the chuck from the mandril and the shank to hold the chuck
to the mandril, D a ring of harder metal slightly smaller in the hole than the
shank C as shewn to resist wear, the chuck may have a projection or projections C1
to engage with mandril, we prefer it to be without.
6. An extractor Fig. 2 being a forked wrench or lever with the forked part E at an
angle with the handle F the forks being of such shape as to reach half round the
mandril G and take hold of the shoulder B Fig. 1, H a small projection as a fulcrum
when placed against the headstock or other fixture.
7. The mould may consist of three parts viz. the base I Fig. 3 to contain the shank (
Fig. 1 the upper part J to contain the body A Fig. 1 being divided as shewn at K the
part L being left open for pouring, M an anular groove making a sharp edge with
the opening L, a bracket N fixed truly central with the mould is bored with a true
conical hole O. to contain dies P which are bored or shaped to suit each tool & to hold
it in the exact position required.
"
8. A chuck for larger tools consists substantially as described in paragraph 5 except
in being made of less fuseable metal & with the part A Fig. 1 enlarged and containing
a cavity QFig. 4 to contain fuseable metal or cement, a shoulder R truly turned
for the part mould S to fit upon the said part S containing a true conical
hole O substantially as described in paragraph 7. P1 openings left for pouring.
9. Construction of chucks, the part I of the mould Fig. 3 being placed on a level
surface a ring if required being placed upon the shoulder K the part J with part N
affixed being placed upon I a suitable die being chosen the tool fixed therein is then
placed in the opening O, the metal or composition is now poured in by means of a
ladle with suitable spout at the opening L when set the mould is opened & the-chuck
removed leaving the tool fixed as required.
10. The chuck may be placed in position in the mandril while the mandril is at rest
or in motion by holding the part A Fig. 1 in the fingers of the (preferably) left hand
& placing the shank C partly in the cavity of the mandril then giving it a quick jerk
to send it home.

page_text: 11. To remove the chuck while still or in motion the (preferably) left hand is placed
with the hollow of the hand under the part A Fig. 1 with the thumb above but not
touching it, the extractor Fig. 2. being taken in the other hand by the handlerF the
forked part E is placed behind the shoulder B Fig. 1 a quick pull upon the
handle F using the part H. as a fulcrum the chuck will fall into the other 5
hand.
Having now particularly described & ascertained the nature of our said Inven-
tion and in what manner the same is to be performed we declare what we
claim is
1. The principle of casting the chucks perfectly true and completely finished upon.
the tools at one opperation as set forth in paragraphs. 7. and, 9.
2. The combination of the plain taper shank with projecting shoulder & protecting
ring affixed as set forth in paragraph 5.
1
"
3. The property of placing or removing the chucks in or removing from the mandril
while in motion or at rest as set forth in paragraph. 10 and 11, and in combination,]
with claim 1 and 2.
Dated this 11th day of February 1890.