IMPROVEMENTS IN MACHINERY OR APPARATUS FOR GLAZING AND POLISHING SAW BLADES AND OTHER FLAT SURFACES, PARTS OF WHICH IMPROVEMENTS ARE APPLICABLE TO THE BEARINGS OF SHAFTS AND SPINDLES GENERALLY
Year: 1871

page_text: LETTERS PATENT to Joseph Taylor, the younger, Saw Manufacturer,,
and James Prest, Engineer, both of Sheffield, in the County of York,
for the Invention of "IMPROVEMENTS IN MACHINERY OR APPARATUS FOR
GLAZING AND POLISHING SAW BLADES AND OTHER FLAT SURFACES, PARTS OF
WHICH IMPROVEMENTS ARE APPLICABLE TO THE BEARINGS OF SHAFTS AND
SPINDLES GENERALLY."
Sealed the 12th December 1871, and dated the 5th July 1871.
PROVISIONAL SPECIFICATION left by the said Joseph Taylor and
James Prest at the Office of the Commissioners of Patents, with
their Petition, on the 5th July 1871.
We, JOSEPH TAYLOR, the younger, Saw Manufacturer, and JAMES
PREST, Engineer, both of Sheffield, in the County of York, do hereby
declare the nature of our said Invention for "IMPROVEMENTS IN MACHINERY
OR APPARATUS FOR GLAZING AND POLISHING SAW BLADES AND OTHER FLAT SUR-
FACES, PARTS OF
WHICH IMPROVEMENTS ARE APPLICABLE TO THE BEARINGS OF
SHAFTS AND SPINDLES GENERALLY," to be as follows:-
This Invention relates to a peculiar combination and arrangement of
machinery or apparatus for performing the operation known in the saw

page_text: trade as "glazing," and also for effecting the polishing of saw blades and
other flat surfaces.
According to this Invention we employ a circular glazer driven at a
high velocity, and covered with leather or other suitable material, and
situato above the saw blade or other article to be glazed or polished,
such article being held up to the glazer or polisher by a roller covered
with india-rubber, leather, or other suitable material, and driven at a
slower speed than the "glazer" or polisher. In lieu of a bottom roller
a stationary curved bar or surface may be employed for holding the saw
blade to the glazing or polishing surface. Or a bottom rotatory glazer
or polisher may be employed in conjunction with the top one, the two
being of the same or different diameters, and revolving in the same
direction, but at the same surface speed. In combination with thc
principal or top glazer or polisher there is a hopper or receptacle for
emery or other polishing powder, the said hopper being provided with
an adjustable delivery mouth for the purpose of regulating the distri-
bution of the powder over the surface of the saw blade or other article
under treatment.
In order to enable the same machine without adjustment by the
attendant to operate upon articles of various thickness we mount the
bearings of the lower roll or supporting surface upon slides acted upon
by a weighted lever, or levers or springs, so as to afford a yielding
pressure, thus rendering the machine self-adjusting to any required
thickness of work.
With a view to maintain the bearings of the top glazer truly central
at all times, and the face of the glazer parallel to that of the roll below,
we employ in combination with a solid bored bearing the adjustable,
hollow, conical bush of hard metal, into and by which the corre-
spondingly tapered ends of the spindle. enter and are partly supported,
the parallel or cylindrical portion of the journal of the spindle being
supported in the cylindrical part of the solid bearing. Oil or other
lubricating medium is supplied through the hollow portions of the.
adjustable bushes from oil cups fitted thereon, and the said bushes are
set up or tightened as required by simply driving them further in and
fixing them by set screws or otherwise. Adjustable bearings of this
construction are obviously applicable to all shafts or spindles revolving
at high velocities.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Joseph Taylor and James Prest in the Great Scal
Patent Office on the 30th December 1871.
TO ALL TO WHOM THESE PRESENTS SHALL COME, we, JOSEPIL
TAYLOR, the younger, Saw Manufacturer, and JAMES PREST, Engineer,
both of Sheffield, in the County of York, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Fifth day of July, in the year of our
Lord One thousand eight hundred and seventy-one, in the 35th year
of Her reign, did, for Herself, Her heirs and successors, give and grant
'unto us, the said Joseph Taylor, the younger, and James Prest, Her
special license that we, the said Joseph Taylor, the younger, and James
Prest, our executors, administrators, and assigns, or such others as we,
the said Joseph Taylor, the younger, and James Prest, our exccutors,
administrators, or assigns, should at any time agree with, and no
others, from time to time and at all times thereafter during the term
therein expressed, should and lawfully might make, usc, exercise, and
vend, within the United Kingdom of Great Britain and Ireland, the
Channel Islands, and Isle of Man, an Invention for "IMPROVEMENTS IN
MACHINERY OR APPARATUS FOR GLAZING AND POLISHING SAW BLADES AND OTHER
FLAT SURFACES, PARTS OF WHICH IMPROVEMENTS ARE APPLICABLE TO THE BEARINGS
OF SHAFTS AND SPINDLES GENERALLY," upon the condition (amongst others)
that we, the said Joseph Taylor, the younger, and James Prest, our
exccutors or administrators, by an instrument in writing under our
hands and seals, or under the hand and scal of one of us, should par-
ticularly describe and ascertain the nature of the said Invention, and
in what manner the same was to be performed, and cause the same to
be filed in the Great Seal Patent Office within six calendar months.
next and immediately after the date of the said Letters Patent.
NOW KNOW YE, that we, the said Joseph Taylor, the younger, and
James Prest, do hereby declare the nature of our said Invention, and in
what manner the same is to be performed, to be particularly described
and ascertained in and by the following statement, reference being had
to the accompanying Drawings and to the letters and figures marked
thereon (that is to say):
-
Our said Invention relates to a peculiar combination and arrangement
known in tha

page_text: saw trade as "
glazing," and also for effecting the polishing of saw blades
and other flat surfaces.
According to this Invention we employ a circular glazer driven at a
high velocity, and covered with leather or other suitable material, and
situate above the saw blade or other article to be glazed or polished,
such article being held up to the glazer or polisher by a roller covered
with india-rubber, leather, or other suitable material, and driven at a
slower speed than the "glazer" or polisher. In combination with the
principal or top glazer or polisher there is a hopper or receptacle for
emery or other polishing powder, the said hopper being provided with
an adjustable delivering mouth for the purpose of regulating the dis-
tribution of the powder over the surface of the saw blade or other
article under treatment.
In order to enable the same machine without adjustment by the
attendant to operate upon articles of various thickness, we mount the
bearings of the lower roll or supporting surface upon slides acted upon
by a weighted lever or levers or springs, so as to afford a yielding
pressure, thus rendering the machine self-adjusting to any required.
thickness of work.
With a view to maintain the bearings of the top glazer truly central
at all times, and the face of the glazer parallel to that of the roll below,
we employ in combination with a solid bored bearing an adjustable
hollow conical bush of hard cast metal, into and by which the corre-
spondingly tapered ends of the spindle enter and are partly supported,
the parallel or cylindrical portion of the journal of the spindle being
supported in the cylindrical part of the solid bearing. Oil or other
lubricating medium is supplied through the hollow portions of the
adjustable bushes from oil cups fitted thereon, and the said bushes are
set up or tightened as required by simply driving them further in and
fixing them by set screws or otherwise. Adjustable bearings of this
construction are obviously applicable to all shafts or spindles revolving
at high velocities.
And in order that our said Invention may be fully understood we
shall now proceed more particularly to describe the same, and for that
purpose shall refer to the several Figures on the annexed Sheet of
Drawings, the same letters of reference indicating corresponding parts
in all the Figures.

page_text: Figures 1 and 2 of the Drawings represent a longitudinal section and
end view of our improved saw glazing machine.
A, A, are the cast-iron standards or side frames; B is the glazing or
polishing roller or drum mounted on the spindle C, which is carried in
bearings formed in the fixed brackets a; a. This glazer or polisher is
covered with leather or other good polishing material. D is a roller for
holding up the saw or other like article to be polished or glazed against
the drum B. The spindle of the roller D is mounted in bearings carried
by a vertically sliding carriage E, which is pressed upwards by the
action of the weight F on the end of a lever arm attached to a rocking
frame ¹, to which latter is fitted the lever handle G. The upward
pressure of the roller D serves to keep the saw blade well up to the
glazer, whilst the depression of the lever handle G releases the saw blade
from contact with the glazer. The lower roller D is driven at a slow
speed from the shaft H by the frictional or other gearing I, I. This
shaft H works in bearings also carried in the vertically sliding carriage E,
and is fitted with a driving pulley K driven by a belt from the small
pulley L on the first motion shaft M, which receives its motion from a
belt passing over the large driving pulley N; a rapid rotating motion
is imparted to the glazer B by an independent belt passing over the
pulley O on the shaft of the glazing or polishing drum. P, P, arc a
pair of guide rollers covered with leather or india-rubber, and mounted
in slots in the brackets d, d, being pressed together by pressing screws
for guiding the saw blades between the glazer and the pressing roller.
A hand wheel Q, Q, fast on one or both ends of the upper or lower guide
roller serves to facilitate the rotation of the same by hand when intro-
ducing a saw blade between them. R is a curved hopper for holding.
cmery or polishing powder, it is secured to the cross bar A¹ of the
standards, and gradually tapers to a narrow mouth or slot which is more
or less contracted by thumb screws at f; this hopper allows sufficient
emery to fall upon the upper surface of the saw blade at a point just in
front of where the glazer begins to operate. The polished or glazed
saw blades are received on the table S as fast as they pass under the
glazer, and are removed by an attendant situate at the end of the said
table.
We propose to construct all the principal bearings in this machine in-
the manner shown in section in Figure 3. This improved bearing con-
sists of the adjustable hollow conical bush T, which is fitted into a solid,

page_text: bored bearing. The spindle which is intended to work in these bearings
has its ends tapered or made conical to correspond to the hollow conical
cavity in the bush T. The end of the bush in which the conical
cavity is formed does not protrude beyond the solid bored bearing, so
that the cylindrical portion of the spindle or shaft may take its bearing
in the solid bored bearing, whilst at the same time a perfect centring
is obtained by the fitting together of the two conical surfaces. It is
obvious that the hollow cone may be made on the end of the spindle,
and the corresponding solid cone formed on the end of the bush T. An
oil chamber is made in the bush which is fitted with an oil cup i, and
a small aperture is drilled inside the bush, so as to connect the oil
chamber with the rubbing surfaces of the two concs. Set screws 1, 1,
(Figures 1 and 2) are fitted into the solid bearings for the purpose of
fixing the position of the bushes.
Although we have shown these peculiar bushes as being applied to
our saw glazing machine, it is obvious that they may be applied with
advantage to the shafts or spindles of all machines wherein it is essential
that a true central position of such shafts shall be maintained.
Having now described and particularly ascertained the nature of our
said Invention, and the manner in which the same is or may be used or
carried into effect, we would observe in conclusion that what we consider
to be novel and original, and therefore claim as the Invention secured to
us by the hercin-before in part recited Letters Patent is,-
1st. The application and use to and in the glazing and polishing of saw
blades and other like articles of a rotatory glazing drum or roller covered
with leather or other suitable material revolving at a high velocity, and
operating upon the upper face of the article to be glazed or polished
in combination with an adjustable pressing roller below the article
revolving at a slower speed than the glazer, substantially as hercin-
before described and illustrated by our Drawings.
2ndly. The combination of the top glazing or polishing roller or
drum, the bottom pressing roller, and the two guide rollers operating
together, substantially in the manner and for the purpose herein-before
described.
Thirdly. The combination with the top glazing or polishing drum or
roller of a hopper having an adjustable discharge mouth for supplying
emery or polishing powder on to the upper surface of the saw blade or
other like article to be glazed or polished, as herein-before described.

page_text: Fourthly. The rendering the lower or pressing roller capable of
yielding by mounting it upon slides which are pressed upwards by a
weighted lever or its equivalent, substantially as and for the purpose
herein-before described.
Fifthly. The combination with an ordinary solid bored bearing of an
adjustable bush of hard metal made conical at one end for maintaining
in position a revolving shaft or spindle, substantially as herein-before
described and illustrated by Figure 3 of our Drawings.
Sixthly. The combination of the oil chamber, oil cup, and aperture k
with the said adjustable conical bush, as and for the purpose herein-
before described and illustrated by Figure 3 of our Drawings.
In witness wliercof, wc, the said Joseph Taylor, the younger, and
James Prest, have to this our Specification set our hands and scals,
this Twentieth day of December One thousand eight hundred and
seventy-one.
JOSEPH TAYLOR, JUNIOR. (L.S.)
JAMES PREST.
(L.S.)