IMPROVEMENTS IN Å PRARATIIS FOR GRINDING AND POLISHINg Reaper and Mower KNIVES
Year: 1871

page_text: LETTERS PATENT to Samuel Osborn, of Sheffield, in the County of
York, Steel Manufacturer, for the Invention of "IMPROVEMENTS IN
Å PRARATIIS FOR GRINDING AND POLISHINg Reaper and Mower KNIVES”
Sealed the 30th April 1872, and dated the 7th November 1871.
PROVISIONAL SPECIFICATION left by the said Samuel Osborn at the
Office of the Commissioners of Patents, with his Petition, on the
7th November 1871.
I, SAMUEL OSBORN, of Sheffield, in the County of York, Steel Manu-
5 facturer, do hereby declare the nature of the said Invention for "IMPROVE-
MENTS IN APPARATUS FOR GRINDING AND POLISHING REAPER AND MOWER KNIVES,”
to be as follows, that is to say :—
This Invention relates to apparatus designed to expedite, improve, and
cheapen the operations of grinding and polishing reaper and mower

page_text: The apparatus comprises a bed frame having fixed on it two guide
standards, and sustaining between them a grindstone or polishing wheel
on a horizontal shaft. A slide or carriage is arranged to move on guides
on the bed frame beneath the stone or wheel, and the knives are held in
trays which are fixed on the slide. The slide is moved slowly along |
under the stone or wheel as the latter revolves by any suitable feed
motion, as for example by means of a pinion driven from the shaft of
the stone or from any other suitable revolving shaft, and acting on a rack
formed or fixed on the under side of the slide.
The tray for holding the knives when being ground or polished on the
flat side is made with a horizontal bed, and with studs to project up into
the rivet holes of the knives. The tray for holding the knives when
having the "swage" or bevilled parts ground is made with an inclined
bed at one end, and with inclined grooves across the bottom, and the
knives lie in inclined positions in contact with each other, and are held 1
by a clamp at the end furthest from the inclined bed.
filed by the said Samuel Osborn in the Great Seal Patent Office on
the 6th May 1872.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, SAMUEL 2
OSBORN, of Sheffield, in the County of York, Steel Manufacturer, send
greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Seventh day of November, in the
year of our Lord One thousand eight hundred and seventy-one, in the 2
thirty-fifth year of Her reign, did, for Herself, Her heirs and succes-
sors, give and grant unto me, the said Samuel Osborn, Her special
licence that I, the said Samuel Osborn, my executors, administrators,
and assigns, or such others as I, the said Samuel Osborn, my executors,
administrators, and assigns, should at any time agree with, and no others, a
from time to time and at all times thereafter during the term therein
expressed, should and lawfully might make, use, excrcise, and vend,

page_text: of vertical adjustment in the guide slots of the standards 2. The bearing
blocks 6 arc simultaneously adjusted by means of vertical screwed
spindles 7 tapped through them and held in the standards 2, bevil wheels
8 being fixed on the upper ends of the spindles 7 to gear with bevil
wheels 9 on a horizontal spindle 10. carried in brackets 11, and fitted
with a hand wheel 12 for turning it by. On the bed frame 1 V shaped
guide rails 13 are formed or fixed for a slide or carriage 14 to move upou
along beneath the grindstone or wheel 3, and the knives are held in
trays 15 which are fixed on the slide 14. The slide 14 is moved slowly
along under the grindstone or wheel 3 as the latter revolves by any
suitable feed or progressive motion, as for example by means of a pinion
16 on'a shaft 17, acting on a rack 18 formed or fixed on the under side
of the slide 14. The shaft 17 has on it fast and loose pulleys 19 to
receive a driving belt.
"
The tray (15) for holding the knives when being ground or polished
on the flat side is made with a simple horizontal bed, and with studs to
project up into the rivet holes of the knives so as to prevent them from
slipping. The tray for holding the knives when having the "swage
or bevilled parts ground or polished, is shown in plan in Figure 3, in
longitudinal vertical section in Figure 4, and in transverse vertical
section in Figure 5. The tray 15 which is of cast iron is formed with
an inclined bed, which at one end 20 is shaped so as to support the first
knife 21 laid down in such an inclined position that the intended
bevilled surface on one of its cutting edges may be horizontal or parallel
with the top of the slide 14. The other knives are laid successively on
each other; and the other side edges of all the knives rest in checks or
grooves formed in the bed, whilst their back edges lic against the rib 22.
When the tray is filled a clamp 23 is screwed down upon the last one,
and holds the entire series in their places. The tray is moved under the
grindstone in the direction of the arrow in Figure 4, and the part of the
stonc in contact with the knives moves in the opposite direction. Each
knife is thus individually supported against the grinding action by the
check in the tray bed into which one of its side edges fits.
.

page_text: that what I believe to be novel and original, and claim as the Invention
secured to me by the herein-before in part recited Letters Patent is,―
1. The arranging or combining together of the parts of apparatus for
grinding and polishing reaper and mower knives, substantially in the
improved manner herein described and delineated.
2. The arranging or holding of a number of the knives on a tray or
slide, which by means of a suitable progressive motion presents them
successively to the grindstone or polishing wheel, substantially as herein-
before described.
In witness whereof, I, the said Samuel Osborn, have hereunto set
my hand and seal, this Fourth day of May, in the year of our
Lord One thousand cight hundred and seventy-two.
Witness,
EDMUND HUNT,
Patent Agent,
Glasgow.
SA ML. OSBORN. (L.S.)