An Improved Method of and Process for Centering and Mounting Work in Lathes and other Tools.
Year: 1894

page_text: Date of Application, 4th June, 1894
Complete Specification Left, 4th Mar., 1895-Accepted, 6th Apr., 1895
PROVISIONAL SPECIFICATION.
An Improved Method of and Process for Centering and Mounting
Work in Lathes and other Tools.
A communication to me from FRIEDRICH HEINRICH FLOTTMANN, of Bochum,
in the Empire of Germany, Engineer.
1, EDMUND EDWARDS, of the Firm of Edwards and Co., Patent Agents and
Engineers, of 65 and 66 Chancery Lane, in the County of Middlesex, do hereby
declare the nature of this invention to be as follows:-
The object of this invention is to easily centre and mount in lathes or other tools
work of any kind, particularly articles of which large numbers are to be made, in
order to carry out turning, cutting, boring, polishing and other similar operations.
The process consists essentially in providing the work (for instance castings such
as armatures, valves, cocks, slides, tubes, and the like) at two opposite sides with
projecting cross-shaped ribs, the branches or arms of which are situated symmetri-
cally and vertically to the axis of the article.
The articles so prepared are then mounted or fixed to a suitable clamp, having
the forms of three branches of the cross recessed in it.
It is obvious that instead of the cross-shaped ribs other symmetrically shaped
rihs may be used.
The clamp is fixed to the spindle of the lathe or other machine, but the improved
device can also be used in cases in which' the work is fixed, while the tools are
moveable.
EDWARDS & Co.,
65 and 66, Chancery Lane, London, Agents for the Applicant.
a
An Improved Method of and Process for Centering and Mounting
Work in Lathes and other Tools.
A communication to me from FRIEDRICH HEINRICH FLOTTMANN, of Bochum,
in the Empire of Germany, Engineer.
I, EDMUND EDWARDS, of the Firm of Edwards and Co., Patent Agents and
Engineers, of 65 and 66 Chancery Lane, in the County of Middlesex, 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 and accompanying drawing, that is to say :-
The object of this invention is to easily centre and mount in lathes and other
tools, objects of any kind, particularly articles of which large numbers are to be
made, in order to carry out turning, cutting, boring, polishing and other similar
operations.
The improved method consists essentially in providing the work (for instance,
castings such as armatures, valves, cocks, slides, tubes, and the like), at two opposite

page_text: Figure 8 is a detail, representing a holding washer..
Similar reference letters.indicate similar parts, throughout the figures.
The means for carrying out the invention consist essentially of a yoke-shaped
clamp or holder a,which is screw-threaded at the central part so that it may be
screwed into the spindle A of the machine...
The holder a is provided with projectionstata! Figure 6, whilst at the front part
it is provided with.arseat.or recess a²...
Into these recesses.the.article.b (which is supposed in the drawing to be a stop-
valve case),is placed...
For this purpose..it is sprovided. with bearing-ribs c at two opposite sides; the
branches of these ribs. being, arranged symmetrically and vertically to the axis
of the article. The latter, is then arranged in such a manner that, one. rib lies
in the recess a while the ribs at right angles thereto rest upon the projection al
After having placed the article in. position. it..is fixed. to the holder:. This is
effected by means of two washers d (Figure 8), which are passed over the screw.
bolts e fixed to the holder and are held in place by means. of nuts.f..
As shewn by Figure 8, the washers are provided with a recess.in which the
fourth rib is adapted to.fit.so that.the-washers, when the uuts are tightened, press
upon the two supporting ribs...
In this way the article is secured against any lateral displacement.
4.
In the example shewn, the article, such as a stop-valve casing,, is provided with
three flanges 61 62 63, to be faced or turned, the flange being shewn in working
position. The flange being finished, the article is removed, and it is turned
round for 45 or 90 degrees and placed again in the holder; so that other branches
of the cross ribs serve as supports, and the second flange may then be faced or
turned.
The third flange is then treated in similar manner, and so on.
It is obvious that, instead of the cross shaped ribs, other regular ribs, as square,
pentagonal; or the likes may be used in every case, however, .the holders
must be provided with the reversed seats-corresponding with those on the article
in question.
With the same advantage the device described may be used in cases in which
the article is stationary, whilst the tools are moveable:
It is to be understood that the novel method can be modified in such manner, that
the holder is provided with 'the symmetrical ribs, and the article with the reversed
corresponding recesses.
Having now particularly described and ascertained the nature ofimy, said-inven-
tion, and in what manner the same ist to be performed,, I..declare that..what..I
claim is.:
1: The herein described method of centering articles having a number of surfaces
to be turned or faced; at various angles to each other, consisting in forming on the
said article a series of bearings corresponding to the number of faces to be
turned each bearing being in a proper relation to its face to centre the article,
and then placing the article in a holder having seats for the bearings; and
"1

page_text: bringing each bearing in succession into contact with the said seat, in order to
present the various faces properly centered to the too!, substantially as described.
2. In combination with the holder a having the seats, the formation upon the
article 6 having a plurality of faces to be treated, a corresponding number of
independent bearings to engage with the said seats in succession, substantially as
described and illustrated.
3. In combination with the holder a, having the seats, the formation upon the
article to be treated, of bearings of angular cross section adapted to the said
seats, to prevent rotation when placed therein, substantially as described and
illustrated.
4. A holder for articles to be turned or faced, having two arms and seats therein
for the articles, such seats comprising the projection a¹ and the recess a² sub-
stantially as described and illustrated.
5. In combination with the holder, having the recess a² and the projection a¹ at
right angles thereto, the formation upon the articles having a number of faces to be
treated, of ribs e corresponding thereto and at right angles to each other, substan-
tially as described and illustrated.
1
1007
EDWARDS & Co.,
65 and 66, Chancery Lane, Agents for the Applicant.