Year: 1886

page_text: Date of Application, 9th Nov., 1886.
Complete Left, 25th Apr., 1887.
Complete Accepted, 27th May, 1887.
Wo, WILLIAM NEWZAM NICHOLSON and WILLIAM MATHER, both of Newark upon
Trent in the County of Nottingham, Agricultural Engineers do hereby declare the
nature of our said invention to be as follows:-
Our invention is for Improvements in what are known as "Self Acting" Horse
Rakes in which the Teeth are lifted by the onward progress of the Horse, and consists
in the methods of engaging and releasing the pawls which gear into Ratchet wheels
formed on the naves of tho Travelling wheels.
.
In carrying out our invention we fix Excentrics to the Axle of the Rake. These
Excentrics are provided with straps, each strap having an elongation which is guided
by a slot and pin or analagous contrivance from a point on the Rocking frame of the
Rako. The outer end of the excentric straps carry catches, which, when the Rako is
in a position for Raking, engage with the pawls and bold them from gearing with the
Ratchet wheels. When it is required to empty the Rake, a slight depressing motion
is given to the Rocking frame of the Rake by a hand or foot lever, which has the
effect firstly, of unlocking the Rake so that the teeth can be lifted and secondly of
giving motion by the excentrics to the catches at the end of their straps, causing them
to clear the pawls which are then free to gear with the Ratchet wheels and lift the
teeth by the onward motion of the Horse.
The relative position of the excentrics and pawls is so fixed, that when a sufficient
amount of rotation has been given to the teeth to empty them of their load, projections
on the excentric straps come into contact with the pawls and lift them out of gear with
the Ratchet wheels and allow the teeth to drop, at the same time the catches at the
ends of the excentric straps engage with the pawls, and retain them from coming into
gear again as the teeth resume their proper position for raking.
A
1 1004
GEO. DOWNING,
Agent for Applicants.

page_text: WILLIAM NEWZAM NICHOLSON and WILLIAM MATHER, both of Newark upon Trent
in the County of Nottingham, Agricultural Engineers, 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 :-
Our invention is for improvements in what are known as "Self Acting Horse
Rakes," in which the teeth are lifted by the onward progress of the horse, and consists
in the method of engaging and releasing the pawls which gear into ratchet wheels
formed on the naves of the travelling wheels. In the appended sheet of drawings
Figure 1 represents in end elevation and partial section so much of a solf acting horse
rake as is sufficient to illustrate our invention, the teeth being in the proper position
for raking; and Figure 2 represents the same in a like manner but with the teeth
raised and the pawis just released from the ratchets in order that the teeth may drop
back to the position for raking.
In carrying out our invention we fix eccentrics A to the axle B of the rake, these
occentrics are provided with straps Coach strap having an elongation which is guided
by a slot 6 from a pin or stud c fixed on the rocking frame D of the rake. The outer
ends of the eccentric straps Care made as catches d, which, when the rake is in a position
for raking as in Figure i, engage with the pawls E and hold them from gearing with
the ratchet wheels F; these for the sake of clearness in the drawings are shown in
dotted lines, and are formed upon the naves of the travelling wheels. The pawls E
may either rest direct upon the catches d of the eccentric straps or through the inter-
vention of the toe pieces e, these toe pieces being made adjustable on the pawls E by
means of the slots so that they can be set to engage more or less deeply with
the catches d, and an allowance made for wear or accidental deflection of the
parts. When it is required to empty the rake a slight depressing motion is given to
the rocking frame D by an ordinary hand or foot lever, which has the effect, firstly of
unlocking the rake in the ordinary manner so that the teeth T can be lifted; and
secondly of giving motion by means of the stud c to the eccentric straps which
revolving round their fixed eccentrics A are moved outwards as shown in dotted lines
in Figure 1. The catches dare thus pushed from under the toe pieces e of the pawls E
which are then free to drop into gear with the ratchet wheels F, these, revolving with
the travelling wheels in the direction of the arrow, then lift the teeth T by the onward
motion of the horse. When the teeth T have been lifted to the required height, as
shown in Figure 2, the projections f on the eccentric straps C come in contact with

page_text: the pawls E and throw them out of gear with the ratchet wheels F. The pawls E
then fall over clear of the ratchet wheels to the position shown in dotted lines, and on
the tooth T dropping back to their proper position for raking they again fall back into
contact with the catches d as shown in Figure 1, and are so held clear of the ratchet
whools until it is again required to empty the rake. The amount of motion of the
pawls E round their axis is limited by the stops on the rocking frame D, so that
they cannot fall over on the wrong side of their axis when the teeth T are dropping
back.
-
Having now particularly described and ascertained the nature of our said Invention
and in what manner the same is to be performed we declare that what we claim is :-
The method of operating the pawls of self acting Horse Rakes by means of the
eccentrics A and their straps C, substantially as shown and described.