Improvements in Lathes for Buffing, Polishing, and other like purposes.
Year: 1894

page_text: Date of Application, 10th Oct., 1894
Complete Specification Left, 9th July, 1895-Accepted, 10th Aug., 1895
PROVISIONAL SPECIFICATION.
Improvements in Lathes for Buffing, Polishing, and other like
purposes.
I, ALBERT DAVIDSON 14 Arundel Street, in the City of Sheffield, Engineer,
do hereby declare the nature of my invention to be as follows:-
This invention relates to improvements in the construction of lathe headstocks
and spindles such as are used for buffing, polishing, grinding and other like
purposes, the object being to produce a superior tool to those now used for such
purposes.
I propose therefore to make the body of the headstock without any bearings for
the spindle, the two uprights being cut off just below the position of the bearings
and being bored out vertically to receive the shanks of separately made bearings.
The underside edges of the body are grooved and in the grooves I place slightly
projecting rubber strips to form a cushion or bed upon the gautry to prevent shake
or jarring motion.
I make the spindle bearings with shanks which are turned to fit into the vertically
bored holes in the headstock, while resting upon the metal or upon an intermediate
washer, so that the bearings can adjust themselves to the spindle, in which position
they may be secured' by set screws.
I make the bearings much longer than usual with removable caps and preferably
provided with grooves to convey and distribute the oil or other lubricant to the neck
of the spindle, but I may leave them plain if preferred.
I make the spindle preferably without solid or other permanently fixed collars,
and substitute loose collars which are fixed in position by a set screw or its equi-
valent which is dressed off level but which can be withdrawn to permit the collars
to be adjusted as they wear.
These spindles aro usually driven by a belt running upon a fast pulley, and
having a loose pulley alongside upon which the belt is moved to stop the spindle,
and in practice both the loose pulley and the spindle are subject to rapid wear; to
obviate this I place the loose pulley upon a sleeve which is secured to the
spindle, and which has a collar at one end, the other end entering the recessed
end of the fast pulley, this arrangement gives a larger wearing surface, and a
new sleeve can readily be substituted for a worn one when required.
The spindles are fitted with removable points to suit various kind of work.
Dated the 5th day of October 1894.
COMPLETE SPECIFICATION.
Improvements in Lathes for Buffing, Polishing, and other like
purposes.
I, ALBERT DAVIDSON, 14 Arundel Street, in the City of Sheffield, Engineer
do hereby declare the nature of this invention and in what manner the same has to
be performed, to be particularly described and ascertained in and' by the following
statement:-
This invention relates to improvemente in the construction of lathe hoodstocks
Improvements in Lathes for Buffing, Polishing, and other like
purposes.
I, ALBERT DAVIDSON, 14 Arundel Street, in the City of Sheffield, Engineer
do hereby declare the nature of this invention and in what manner the same has to
be performed, to be particularly described and ascertained in and by the following
statement :-
This invention relates to improvemente in the construction of lathe hoodstanko

page_text: and spindles such as are used for buffing purposes, polishing, grinding and other
like work, the object being to produce a superior headstock to those us at present
constructed!
The annexed sheet of drawings ilustrates my invention, and similar letters of
reference indicate similar parts of the apparatus, in any of the figures.
Fig. 1, represents a sectional elevation of my improved buffing headstock.
Fig. 2, plan of same with parts in section.
In carrying out my invention as shown, in the annexed drawings, i make the
body A, of the headstock without the usual lower half of the bearing for the
spindle, the two uprights B, being cut off or terminating just below the position of
such bearings, and being bored out, vertically to receive the shanks C, of separately
made bearings D, which are turned to correspond therewith.
The underside edges of the headstock are preferably made with a groove in
which I place a slightly projecting strip of rubber E, to form a cushion between
the headstock and the gantry to prevent vibration, but this is not essential.
I make the spindle bearings with shanks C, which are turned as before described
to fit into the two uprights B, B, and having a shoulder which rests upon the
upright, or upon an intermediately placed washer, in order that they may adjust
themselves automatically to the line of the spindle F,,in which position they may
bo secured by set screws or the like.
I make the bearings much longer than usual and fit them with renovable caps G,
the oil cups H, being provided with a number of grooves seen in Fig. 1, to carry
and distribute the lubricant to the neck of the spindle F.
The spindle F; is made without solid collars, or collars permanently affixed
thereto às is now usual, and secure it in position by one or more loose and detach-
able collars I, which are firmly held by a set screw J, dressed off Hush, but which
can be withdrawu when required for adjustinent.
These spindles are usually driven by a belt running upon a fast pulley K, and
having a loose pulley L, alongside upon which the belt can be moved when it is
desired to stop the spindle.
The louse pulley and the spindle upon which it revolves are thius subject to
rapid wear, and to obviate this I protect the spindle by placing upon it a
sleeve M, which when worn can be replaced, or to reduce the first cost, I elongate
the bearing surface of the loose pulley reducing such elongation and passing it into
the recessed end of the fast bulley K.
The spindles are fitted with removable screwed nozzles of different sizes to suit
large or small buffe, glazers, or other tools.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed I declare that what I
claim is :
1. A headstock for buffing and other like purposes, arranged and constructed, as
hereinbefore described and as illustrated in the annexed drawings.
2. In a headstock for buffing and other purposes, making the bearings D, self-
adjusting to the spindle, as herein before described and shown.
3. In a headstock for buffing and other purposes, having self-adjusting bearings,
constructing the fast and loose pullies K, and L, as hereinbefore described and
shown in the drawings.
Dated the Athides of Jul 1905
ROBT: F. DRURY, C.P.A.,
Bank Buildings, George Street, Sheffield, Agent for Applicant.