IMPROVEMENTS IN APPARATUS FOR BORING WELLS
Year: 1884

page_text: PROVISIONAL SPECIFICATION. :
.I CHARLES CHAPMAN, of the Broughton Road Works, Salford, Lancashire,
Artesian Well Engineer do hereby declare the nature of said Invention for
IMPROVEMENTS IN APPARATUS FOR BORING WELLS, to be as follows:-
My invention relates to boring machines used for making Artesian wells for.
improvements in which I applied for Letters Patent on the first day of May 1884
No 7067 my object being to provide an improved device for rotating the drill or
boring bar that will ensure its positive rotation.
In performing my Invention I dispense with the ordinary ratchet motion and
employ two spiral or helical ratchets with the teeth set in the same direction but
one formed with a right and the other a left hand spiral fixed on the boring bar
and I connect to the bow by which the drill or bar is lifted a sleeve or shell that
is moved a certain distance over the ratchets, in this sleeve are four pawls, two
for each ratchet; near the middle of the eleeve is or may be a web in which is a
hole through which the bar passes. I place at cach side of the web a thick
washer of india-rubber to lessen the jar at the bottom and top of the stroke.
I also fix on the bar above the upper ratchet and below the lower ratchet a collar
and an india-rubber or other washer to lessen the jar when the bar is lifted and
dropped. When the bar is dropped the pawls that engage with and slide on the
lower ratchet cause the suspension rope to twist and when the bar is lifted by the
sleove bearing against the upper collar fixed on the bar (or by the sleeve web) the
rope and the pawls that engage with and slide on the upper ratchet cause
the bar to turn so that when it is again dropped the cutters strike in a fresh place.
Dated this 10th day of Auomet 1881.
CHARLES CHAPMAN.
H. B. Barlow,
Agent for Applicant,
4, Mansfield Chambers,
17, St. Ann's Square, Manchester.

page_text: My invention relates to boring machines used for making Artesian Wells for
improvements in which I applied for Letters Patent on the first day of May 1884
N° 7067, my object being to provide an improved device for rotating the drill or
boring bar that will ensure its positive rotation..
And in order that my Invention may be fully understood and readily carried
_ into effect I will describe-the-accompanying Sheet of Drawings, reference being-
had to the figures and letters marked thereon.
Figure-1-is-a-side view of the upper part of a boring bar fitted with my improved-
device for rotating the same. Fig. 2 is a plan of the same with the upper of the
bow removed. Fig. 3 is a front view of Fig. 1. Fig. 4 a sectional plan on the
line A B. (Fig. 3) Fig. 5 a longitudinal section of Fig. 3 and Fig. 6 a sectional
plan on the line C D. (Fig. 3).
In performing my Invention I dispense with the ordinary ratchet motion and
employ two spiral or helical ratchets a and b respectively with the teeth set in the
same direction, but one formed with a right and the other a left hand spiral; the
ratchets a and b are both fixed on the drill or boring bar c which is suspended as
usual by a rope (not shown) connected to the bow d; the bow d is connected to a
shell e' which is secured to a boss or collar e through which the bar o passes; to
this shell e' are pivoted four spring pawls, two of which ff engage with the teeth
on the ratchet a and the other two g g are for the ratchet b. The boss or collar e
being loose on the bar c the shell e¹ with its pawis is free to slide lengthwise over,
as well as to be moved round, the spiral ratchets a and b. If necessary I place at
each side of the collar e a thick washer of india-rubber (not shown in the Drawings).
to lessen the jar at the bottom and top of the stroke.
When the bar c is dropped the pawls g g that engage with and slide on the
spiral of the lower, ratchet b, cause the shell e, bow d and suspension rope
(connected to the bow) to twist and the pawls ff that engage with and slide on
the spiral of the upper ratchet a to move round to the next tooth. As the shell e¹
and collar'e slide lengthwise on the bar o, when the bar is to be lifted, the pawlsff
sliding on the spiral of the upper ratchet a cause the pawls gg to move round to
the next tooth on the ratchet b so that when the bar c is again dropped it is
turned by the pawls g g engaging with the ratchet b and the cutters (not shown)
secured to the lower end of the bar strike the ground in a fresh place.

page_text: 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
In apparatus for boring wells, the combination with the drill or boring_bar_c of
the two spiral ratchets a and b fixed on the said bar and the pawls ff and g g
connected in the manner shown or in an equivalent manner to the bow & and the
suspension rope, substantially as herein shown and described for the purposes
specified.
H. B. BARLOW,
Agent for Applicant,
4, Mansfield Chambers,
17, St. Ann's Square, Manchester.