Improvements in or connected with Emery Wheels or Polishing and Grinding Machines.
Year: 1896

page_text: Date of Application, 24th Nov., 1896
Complete Specification Loft 21st Ave 4007
1008
Date of Application, 24th Nov., 1896
Complete Specification Loft, 21st Aug., 1997 Accepted, 2nd Oct., 1897
PROVISIONAL SPECIFICATION.
Improvements in or connected with Emery Wheels or Polishing and
Grinding Machines.
I, FRIEDRICH SCHMALTZ of Offenbach-on-the-Main in the Empire of Germany,
Manufacturer, do hereby declare the nature of this invention to be as follows:-
The great advantages of the mechanical treatment of metal by means of emery
discs having been generally recognised in industry and thereupon the use of
emery discs for all possible kinds of polishing and grinding and in most varying
forms having greatly increased, a disadvantage has made itself particularly felt,
namely, the great quantity of dust resulting from such polishing and grinding.
The harmfulness of this dust, both to the health of the workmen and also to the
working of the machines, into the bearings and the like of which latter it pene-
trates, is further increased by the circumstance that the dust resulting from
polishing by emery discs contains emery in addition to the fine metallic particles.
Various endeavours have therefore been made to remove this dust by the use
of suitably shaped protective covers and also of fan ventilators. The first of
these had absolutely no effect, and the latter was only a moderate success, bearing
no proportion to the heavy expenses of fitting up and working.
In order therefore to save these, the idea has been conceived of arranging
ventilating fan vanes on the emery disc itself. The forms of construction of
this kind hitherto known are however incapable of being used, because their
whole construction and arrangement is not such as to effect a thorough drawing
off and removal of the whole of the arising dust.
This invention has for its object an arrangement which fully and completely
attains this object. It possesses also among others various advantages, such for
instance, as the smaller costs of construction and almost non-existent costs of
working; also that it may be easily applied to any existing polishing machine,
and that it enables the dust to be collected and the emery to be re-utilised.
A frame is provided to carry a shaft and polishing disc or wheel. The latter
is retained or held by flanges or plates, one of these being provided with fan
vanes or wings, which are either directly cast on or may be subsequently attached.
The fan vanes or wings are surrounded by a fan case, which in the case of
horizontal grinding or polishing discs extends close to the periphery of the
polishing disc or wheel. The whole is surrounded by a protective casing whose
upper part is so shaped as to catch the dust produced during the polishing and
cause it to fall downwards at the sides. The dust thus enters a passage formed
by the fan case and the casing and this passage leads directly to the central
suction zone of the fan. In this manner the dust from the polishing wheel or
disc is drawn off and forced by the fan into a passage or pipe leading to a dust
collector or into the open air.
In some cases the protective casing may be dispensed with. For this purpose
raised edge or flange is attached to the fan case, which flange is widened out ne

page_text: one side into a hopper or funnel. From this hopper or funnel a suction pipe
then leads directly to the suction zone of the fan.
In the case of vertical discs or wheels, as the discs are only used at one certain
part, the raised edge may here be dispensed with. On the other hand a funnel
is provided at the polishing place (point of friction) which funnel is so shaped
that it draws up the whole of the dust formed. The pipe leading to the suction
zone is in this case with a view to adjustability made telescopic and is further
provided with a removable cover or cap to admit of the removal of the dust
accumulated in the elbow piece.
In the same or similar way, the arrangement may also be employed for other
suitably shaped polishing machines, and also for any other mechanical con-
structions.
The arrangements herein before described may also be employed with polishing
discs of wood, metal or other suitable material.
Dated this 23rd day of November 1896.
WM. P. THOMPSON & Co.,
Of 6 Lord Street, Liverpool, Agents for the Applicant.
Improvements in or connected with Emery Wheels or Polishing and
Grinding Machines.
I, FRIEDRICH SCHMALTZ of Offenbach-on-the-Main in the Empire of Germany,
Manufacturer, 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:-
The great advantages of the mechanical treatment of metal by means of emery
discs having been generally recognised in industry and thereupon the use of
emery discs for all possible kinds of polishing and grinding and in most varying
forms having greatly increased, a disadvantage has made itself particularly felt,
namely, the great quantity of dust resulting from such polishing and grinding.
The harmfulness of this dust both to the health of the workmen and also to the
working of the machines into the bearings and the like of which latter it pene-
trates, is further increased by the circumstance that the dust resulting from
polishing by emery discs contains emery in addition to the fine metallic particles.
Various endeavours have therefore been made to remove this dust by the use
of suitably shaped protective covers and also of fan ventilators. The first of
these had absolutely no effect, and the latter was only a moderate success, bearing
no proportion to the heavy expenses of fitting up and working.
In order therefore to save these, the idea has been conceived of arranging
ventilating fan vanes on the emery disc itself. The forms of construction of
this kind hitherto known are however incapable of being used, because their
whole construction and arrangement is not such as to effect a thorough drawing
off and removal of the whole of the arising dust.
This invention has for its object an arrangement which fully and completely
attains this object. It possesses also among others various advantages, such for
instance as the smaller costs of construction and almost non-existent costs of
working, also that it may be easily applied to any existing polishing machine,
and that it enables the dust to be collected and the emery to be re-utilised.
Various forms of construction of this improved machine are shown in the
accompanying drawings, in which,

page_text: Figures 1 and 2 are vertical sections and plans of horizontal polishing machines;
and
Figures 3 and 4 are front and side elevations respectively of a form of con-
struction in the case of a vertical polishing disc.
A frame a is provided to carry a shaft 6 and polishing disc or wheel c. The latter
is retained or held by flanges or plates d, one of these being provided with fan
vanes or wings e, which are either directly cast on or may be subsequently attached.
The fan vanes or wings are surrounded by a fan case f which, in the forms of
construction shown in Figures 1 and 2, extends close to the periphery of the
polishing disc or wheel. The whole is surrounded by a protective casing g whose
upper part is so shaped as to catch the dust produced during the polishing and
cause it to fall downwards at the sides. The dust thus enters a passage h formed
by the fan case f and the casing 9 and this passage leads directly to the central
suction zone of the fan e. In this manner the dust from the polishing wheel
or disc is drawn off and forced by the fan e into a passage or pipe i leading to a
dust collector or into the open air. In the form of construction shown in Figure 2,
the protective casing g is dispensed with. For this purpose a raised edge or
flange k is attached to the fan case f, which flange is widened out at one side
into a hopper or funnel 1. From this hopper or funnel 1, a suction pipe m then
leads directly to the suction zone of the fan.
The arrangement shown in Figures 3 and 4 is adapted for vertical polishing
discs or wheels. As these discs are only used at one certain part, the raised edge
may here be dispensed with. On the other hand, a funnel is provided at the
polishing place (point of friction) which funnel is so shaped that it draws up
the whole of the dust formed. The pipe m leading to the suction zone is in this
case with a view to adjustability made telescopic, and is further provided with a
removable cover or cap n to admit of the removal of the dust accumulated in the
elbow piece.
In the same or similar way, the arrangement may also be employed for other
suitably shaped polishing machines, and also for any other mechanical construc-
tions. The arrangements hereinbefore described may also be employed with
polishing discs of wood, metal or other suitable material.
Having now particularly described and ascertained the nature of my said in-
vention and in what manner the same is to be performed, I declare that what I
claim is:-
1. A polishing and grinding machine with dust removing device, characterised
by the outer casing (g), enclosing the polishing or grinding disc, being placed
in communication, by means of a passage (h), with the suction zone of a fan or
aspirator placed on one side of the polishing disc or wheel, whereby the dust is
drawn off and carried away, substantially as hereinbefore set forth.
2. The modification of the herein described polishing and grinding machine
with dust removing device which consists in providing a funnel or hopper (7)
instead of the casing surrounding the polishing disc, to catch the dust and convey
it through a pipe or passage (m) to the suction zone of the fan, substantially as
described.
WM. P. THOMPSON & Co.,
Of 6 Lord Street, Liverpool, Agents for the Applicant.