Year: 1887

page_text: Date of Application, 18th July, 1887
Complete Left, 18th May, 1888
Complete Accepted, 22nd June, 1888
DANIEL B. DETWEILER, of the City of Hamilton, County of Wentworth, Province
of Ontario, Dominion of Canada, Manufacturer, do hereby declare the nature of this
invention to be as follows:-
•
My invention relates to the mounting of the cutter knives and bar that they may
all be removed at once and without the necessity of removing the guards or loosening
any of their connections or fastenings on the large bar whereto the guards are
secured.
I attain these objects by the mechanism illustrated in the accompanying drawing,
in which :
Fig. 1 is a plan of a portion of a cutter bar provided with my improved form of
removable bar with cutter knives.
Fig. 2. is a cross sectional view showing a lower cutter knife and bar in position in
its guard.
Fig. 3. is a plan of upper bar with cutting knives rivetted to same.
In the drawing 10 represents the guards which are as usual formed with horizontal
slots within which the knife bar is reciprocated above the cutter knives. The guards 10
are formed with beveled recesses 11 and having a cross bar 12 thus a recess is formed
for the lower cutting knives.
-
Back of the cross bar 12 there is in each guard a recess 14 that is defined upon the
rear by a shoulder 15, above and to the rear of which there is ledge 16 with shoulder 17
forms a recess 18.
The cutter knives to the peculiar arrangement of which this invention more
particularly relates are at 20 and each knife is secured preferably by rivetting to a
bar 21 there being a space between each knife, the knives 20 being so spaced that
they will fit within the guards 10 the forward ends being beveled in order to fit in the
beveled recess 11. The cross bars 12 serve to steady and stiffen the knives that rest
in the recesses 13, while the bar to which all the knives are secured rests within the
recess 14 rear edge of bar abbutting against shoulder 15.

page_text: The cutter knives 30 are secured to a bar 31, any ordinary bar with knives (as
shown in fig. 3) may be used on my machine, but I prefer to make a portion of the
knives wider or narrower, the jar or strain incident in cutting grain is reduced in
consequence of the half of the knives passing into the guards just as the other half
are coming into action.
It will be understood that the guards are as usual rigidly connected to and
supported by the guard bar such as the one as, partially shown at 32. fig. 1. Any of
the well known devices may be employed for the purpose of holding the knife bar
down upon the guard bar.
When desirable to remove the lower knives in order to sharpen them the bar 21 is
slightly raised and drawn back so that it rests upon the ledge 16 and the rear edge of
the bar abbutting at this time against the shoulder 17 after which movement the
bar 21 and with it all the said knives may be withdrawn.
Dated this 14th day of June 1887

page_text: COMPLETE SPECIFICATION.
Improved Cutter Bar and Knives for Harvesting Machines.
I, DANIEL B. DETWEILER, of the City of Hamilton, in the County of Wentworth,
in the Province of Ontario, in the Dominion of Canada, Gentleman, 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:-
My invention relates to the mounting of the cutter knives and bar, that they may
all be removed at once and without the necessity of removing the guards or loosening
any of their connections or fastenings on the large bar whereto the guards are
secured.
I attain these objects by the mechanism illustrated in the drawings left with the
provisional specification, in which :
Fig. 1 is a plan of a portion of a cutter bar provided with my improved form of
removable bar with cutter knives.
Fig. 2 is a cross-sectional view showing a lower cutter knife and bar, in position
within its guard. And
Fig. 3 is a plan of upper bar with cutting knives rivetted to same.
Similar letters refer to similar parts throughout the several views.
In the drawing 10 represents the guards of a guard bar, which are, as usual,
formed with horizontal slots, within which the knife bar is reciprocated above the
cutter knives.
The guards 10 are formed with bevelled recesses 11, and a cross-bar 12, thus
forming a recess for the lower cutting knives.
Back of the cross bar 12, there is in each guard a recess 14 that is defined upon
the rear by a shoulder 15, and to the rear of which there is a ledge 16 with
shoulder 17, which forms a recess 18.
The cutter knives, to the peculiar arrangement of which this invention particularly
relates, are denoted by 20, and each knife is secured, preferably, by rivetting to a
bar 21, there being a space between each knife. The knives 20 are so spaced that
they will fit within the guards 10, the forward ends being bevelled in order to fit in
the bevelled recesses 11.
The cross-bars 12 serve to steady and stiffen the knives that rest in the recesses 13,
while the bar 21, to which all the knives are secured, rests within the recesses 14; the
rear edge of bar abbutting against shoulder 15.
The cutter knives 30 are secured to a bar 31. Any ordinary bar and knives, as
shown in Fig. 3, may be used on my machine, but I prefer to make a portion of the
knives wider or narrower. The jar or strain incident in cutting grain reduced in
consequence, by one-half of the knives passing into the guards just as the other half
are coming into action.
It will be understood that the guards are, as usual, rigidly connected to and
supported by the guard bar-such as the one as partially shown at 32 in Fig. 1. Any

page_text: of the well known devices may be employed for the purpose of holding the knife bar
down upon the guard bar.
When desirable to remove the lower knives in order to sharpen them, the bar 21 is
slightly raised and drawn back so that it rests upon the ledge 16, the rear edge of the
bar abbutting at this time against the shoulder 17, after which movement the bar,
and with it all the said knives, may be withdrawn.
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:
1st. In a reaper and mower cutter bar, the combination with the guards, each
having two recesses on its upper surface, the cross-bars resting in the forward recess
in the guards, and each having a recess to receive the knives, of knives resting in
these recesses and secured to a bar 21 resting in the rear recess of the said guards
substantially as described.
2nd. In a reaper and mower cutter bar the combination with guards with recesses 11
and 14 and provided with cross-bars formed with recesses 13, of a bar carrying
knives 20 formed with bevelled points arranged to fit within the recesses 11 of the
guards while the main bodies of the knives are arranged to rest within the recess 13
of the cross-bar 12 substantially as described.
3rd. In a reaper and mower cutter bar the combination with guards formed with
recesses 14 and a ledge 16 defined by a shoulder 17, of a bar 21 carrying knives 20,
said bar being arranged to rest within the recesses 14 substantially as described.
4th. In a reaper and mower cutter bar the combination with the guards as described
of a bar 21 and knives 20 rivetted to said bar, there being a space between each knife,
substantially as described.
5th. In a reaper and mower cutter bar the combination with the guards and their
supporting bar of a knife bar and knives 30 secured to said bar, a portion of said
knives being narrower or wider than the others substantially as described.
Dated this Seventeenth day of Anvil 1000
JOHN HENDRY,
Agent.