A NEW OR IMPROVED DOUBLE DRILL PLOUGH, PARTS OF WHICH ARE APPLICABLE TO OTHER AGRICULTURAL MACHINES
Year: 1873

page_text: PROVISIONAL SPECIFICATION left by Peter Wilson at the Office of
the Commissioners of Patents, with his Petition, on the 16th July
1873.
I, PETER WILSON, of Noblehall, in the County of Peebles, North
Britain, Farmer and Agricultural Implement Agent, do hereby declare
the nature of the said Invention for "A NEW OR IMPROVED DOUBLE DRILL
PLOUGH, PARTS OF WHICH ARE APPLICABLE TO OTHER AGRICULTURAL MACHINES," to
be as follows, that is to say:
This Invention has reference to the construction and arrangement of
the parts of a new or improved double drill plough as a whole, and of
special parts by themselves separately, some of which are also applicable
to other agricultural implements, and the nature of this Invention or its
improvements will be evident from the following description of a double
drill plough in course of construction in accordance with and illustrative
of one modification of this Invention.
The two drill ploughs (which may themselves be of the ordinary con-
struction as to their socks and hinged or shifting mould boards carried
on their internal frame) are each by these improvements secured to a

page_text: strong longitudinal beam of its own placed above and made to shift
laterally to and from each other parallely on each side of the central
traction beam of the main frame to and upon transverse or lateral bars,
passed through or firmly secured on each side of the said beam, all
forming the main frame of this double drill plough.
The whole frame with its ploughs (so carried on it by keys on the
front and back transverse bars, preferably two to each plough) are carried
on one or two guiding wheels in front and two at the back, which are all
made to slide or rise and fall by their carrying stems in the sockets of
the beams of the frames to which they are set and fixed to any working
depth of the ploughs and drills desired.
-
The main or central traction beam terminates at the back transverse
bar, but is curved or arched up and carried up in front of the fore
cross bar and ploughs, so as to have (as in some other agricultural
implements) the traction shackles or hook and swingle trees attached to
its extreme front end and a little behind, but also considerably in front
of the ploughs; the socket is formed for the nearly vertical sliding
spindle or stem of the guiding wheel which may either be carried on
forked arms or a stud below when one wheel is used, and when two
wheels arc used (as for the subsequent operation of throwing up the
earth on the seed or young plants) then these are carried on the extreme
ends of an arched cross axle attached to the lower end of the said
swivelling spindle. This spindle (so carrying the guiding wheel or
wheels) is swivelled by a long lever secured to its upper end, the handle
of which extends back over a carrying and fixing rail secured to the
back cross bar of the frame, so that the attendant following the machine
can set or guide the machine in a straight or parallel course, and to
raise and lower this front spindle and wheel or wheels a double or
reverse toothed ratchet wheel and plain chain wheel formed or secured
on one boss are carried on a strong stud or bracket with a hand lever
oscillating on same centre, and spring catch arms or palls for engaging and
disengaging the ratchet teeth on the opposite sides of the ratchet wheel,
while the two free ends of the chain, which has a turn or half turn
round the wheel in opposite directions to which it is secured, are
carried forward over reverse guide pulleys attached to fore beam and
attached to hooks or pins at the upper and lower parts of the
swivelling spindle, all so that when the spring pall lever at the rear
of the machine is raised or lowered it regulates the height of the

page_text: guiding wheel or wheels by a positive motion where they can be held
by any fixing segment in use for other hand levers.
The two rear trailing or carrying wheels are preferred to be carried on
lateral studs in the lower end of the vertical sliding stems or spindles
made to work in square or other equivalent sockets formed in the back
ends of the side beams carrying the ploughs, and which will not allow
the spindles to turn, but only to be raised and lowered and fixed by a
pinching screw or key to allow each wheel to run in the centre and
bottom of the drill formed by its respective plough in front, but of
course it will be understood that these vertical sliding spindles or stems
might be made to rise and fall by hand levers and fixing segments when
desired, and that although these guiding and carrying wheels are
preferred to run nearly vertically on horizontal axes, yet it is to be
understood that they might also be set and made to run at an angle as
the wheels in double "furrow" ploughs, although this is not preferred
by the petitioner in this new or improved double "drill" plough, which
is new as a whole, and also in being carried on guiding and trailing
wheels, and in the arrangement of duplex ratchet and chain wheels
with double spring and pall hand lever and chains, all which the
petitioner believes to be quite new for regulating and fixing the height
of the front guiding and carrying wheels of the ploughs and other
agricultural implements, also as well as for this new double drill
plough.