Improved Means for Grinding Mill Bills and other Tools, Applicable also for Rounding Grindstones and other Stones.
Year: 1889

page_text: Date of Application, 8th Jan., 1889
Complete Specification Left, 8th Oct., 1889-Accepted, 9th Nov., 1889
PROVISIONAL SPECIFICATION.
Improved Means for Grinding Mill Bills and other Tools, Applicable
also for Rounding Grindstones and other Stones.
I HENRY THOMAS POATE of Clanfield in the county of Hants Millor do hereby
declare the nature of this invention to be as follows:-
The object of my invention is to provide means for grinding tools and more
especially mill bills in the use of which means the grindstone need not be damaged as
is so generally the case at present by the surface of the periphery thereof being
grooved or worn unevenly while the required grinding is easily quickly and efficiently
performed and when the grindstone is or has been grooved or chipped or worn
unevenly or from other cause requires to be properly rounded or when other stones
similarly require rounding the improved means herein described will also be applicable
for this purpose.
To carry out this object 1 form through a block of metal or wood or other material
a slot preferably somewhat similar in transverse shape to the tool that is to be ground
or used therein and this slot in the block is about as broad as or a little broader than
the stone with which it is to be used. The block is fitted in its breadth with two
pivots somewhat similar to trunnions whereby it is supported in bearings or brackets
preferably adjustably secured on the framing on which the stone is mounted or on
another framing in the proper desired position.
When therefore the mill bill or other tool is duly placed in position in this slot and
is there held and the grindstone is duly revolved this tool is properly ground while if
as is generally the case the end of the tool is narrower than the grindstone the tool
can be moved transversely to the grindstone backwards and forwards along the
breadth of the slot whereby all parts of the grindstone will be or can be utilized and
thus the surface of the periphery thereof need not be grooved or worn unevenly.
When on the other hand the grindstone or other stone is to be rounded the proper
tool is similarly placed and held in the slot and the stone is similarly revolved being
treated in the desired manner by the end of the tool.
Dated this 8th day of Jan 1980
COMPLETE SPECIFICATION.
Improved Means for Grinding Mill Bills and other Tools, Applicable
also for Rounding Grindstones and other Stones.
I HENRY THOMAS POATE of Clanfield in the county of Hants Miller 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 object of this my invention is to provide means for grinding tools and more
especially inill bills in the use of which means the grindstone need not be damaged
as is so generally the case at present by the surface of the periphery thereof being
grooved or worn unevenly while the required grinding is easily quickly and efficiently
performed and when the grindstone is or has been grooved or chipped or worn
unevenly or from other cause requires to be properly rounded or when other stones
similarly require rounding the improved means hereinafter described will also be
applicable for this purpose. ·

page_text: In order the more clearly to explain this my invention I refer to the accompanying
drawing wherein I have shewn two very convenient forms and styles of my
apparatus.
Figure 1 is an end elevation of part of a grindstone with my apparatus in.position
which form and style thereof is more especially applicable for and with mill bills as
shewn and Figure 2 is a side elevation of the same.
or else-
I take a block A of metal wood or other suitable material wherethrough I form a
slot B preferably somewhat similar in transverse shape to the tool that is to be ground
or used therein and this slot B preferably is about as broad as or it may be a little
broader than the stone C with which it is to be used. The block A is fitted in its
breadth with two pivots D somewhat similar to trunnions whereby it is supported in
bearings or brackets E secured on the framing or stand F of the grindstone
where and a lug G preferably projects from the block A by which through the
intervention of a screw as shewn or other suitable appliance the angle that the tool
when placed in the slot B makes with or in relation to the stone can be accurately
adjusted and the tool can very conveniently be clamped in the slot B by a set screw H.
The brackets E are preferably adjustably secured on the framing F or on another
framing as may be desired which can very conveniently be effected by bolts K
fitted with nuts and passing through long slots in the horizontal parts of these
brackets E.
Figure 3 is an end elevation of part of a grindstone with my apparatus in position
which form and style thereof is more especially applicable for and with other tools
particularly those with a cutting edge as shewn and Figure 4 is a side elevation of
the same partly in section.
In this form and style I make the block in two parts A and A¹ which create the
required slot between themselves and the separate part A¹ can be secured to the
block A whereto are fitted the pivots D' as hereinbefore described by thumb screws as
shewn and thus the tool is clamped in position. The brackets E' similarly adjustably
secured on the framing F or elsewhere it may be by the bolts K¹ are preferably in
this form and style made higher so as to bring or hold the tool to and in a better
position on the stone and an elbowed arm L can very conveniently be fitted to one
or both of the brackets E which may be clamped in position as shewn by a thumb
screw whereby the angle that the tool when placed in the slot makes with or in
relation to the stone C can be accurately adjusted.
In both of these forms and styles of my apparatus therefore when the mill bill or
other tool is duly placed in position in the slot in the block and is there held and
retained making the desired angle with or in relation to the stone and this stone is
duly revolved the tool is properly ground while if as is generally the case the end of
the tool is narrower than the grindstone the tool can when desired be moved trans-
versely to the stone backwards and forwards along the breadth of the slot or it may
be the block can be so proportioned to the distance between the supporting brackets
that the block with the tool can be so moved as aforesaid transversely to the stone the
pivots thereof being lengthened accordingly if necessary in either case all parts of the
grindstone will be or can be utilized and thus the surface of the periphery thereof
need not be grooved or worn unevenly.
When on the other hand the grindstone or other stone is to be rounded the proper
tool is similarly placed and held in the slot in the block and the stone is similarly
revolved and therefore is treated in the desired manner by the end of the tool.
I would have it however understood that although I consider the forms and styles
of my apparatus as shewn in the drawing are the best and most convenient for the
several purposes in view-I do in no wise limit myself exactly thereto for it is obvious
that this my apparatus and all the several parts thereof may be made of such shapes
and forms and styles and may be so fitted to and in respect of each other and the stone
as may be convenient or desirable in each particular case..

page_text: Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed I declare that what
I claim is
The improved means for grinding mill bills and other tools and for other purposes
substantially as hereinbefore described and shewn in the accompanying drawing.
Dated this 8th day of October 1889.
HART & CO.