Improvements in machines Used in Earth Boring.
Year: 1895

page_text: Date of Application, 21st Aug., 1895
Complete Specification Left, 15th May, 1896-Accepted, 21st Aug., 1896
Improvements in machines Used in Earth Boring.
I EDWARD LEIGH MATTHEWs of Imperial Ironworks, West Gorton, near
Manchester, Engineer, do hereby declare the nature of this invention to be as
follows:-
My said invention relates to certain improvements in or applicable to machines
used for operating earth boring tools suspended from a rope or other flexible
connection.
The object of my said invention is to obtain a rapid fall of the boring tool with
a slow lift.
This I accomplish by the use of two pairs of elliptical gearing wheels one pair
at each side of the framing of the machine. Extending from a bearing in one of
the elliptical wheels to a similar bearing in the corresponding elliptical wheel at
the other side is a cross shaft carrying a guide pulley about or under which the
rope from the winding drum to the tool is led. The effect of such a combination
is that at a certain point in the traverse of the said guide pulley (where the drop
of the tool commences) its velocity is greatly increased and thus a rapid stroke or
drop of the boring tool is obtained. A corresponding diminution of the velocity
of the guide pulley takes place when the tool is lifted and thus wear of the rope
is diminished and owing to the slower lift less lifting power is needed.
The bearings of the cross shaft in the elliptical wheels can be adjusted so as to
vary at will the length of stroke.
A clutch is provided for putting the excentric gearing out of action when winding
up the tool.
Dated this 20th day of August 1895.
EDWARD LEIGH MATTHEWS of Imperial Iron Works, West Gorton Manchester
Engineer 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 said invention relates to certain improvements in or applicable to machines
used for operating earth boring tools suspended from a rope or other flexible
connection.
..
ليم
1
مان

page_text: & A'B', one pair at each side of machine. The wheels A & A' are secured to a
shaft H on which is secured a toothed wheel I driven by a pinion J, which is
secured to a shaft K driven in turn by friction clutch G. By means of the friction
clutch G the elliptical wheels may be set into motion or stopped at will. The
elliptical wheel B & B¹ are carried on studs L & L' secured in brackets M & M¹.
A sliding bearing D on elliptical wheel B' carries a shaft C on which is placed a
rope guide pulley E under which the rope O from the drum F is led and then to
head gear N.
When working, the drum F is stationary and the elliptical gear in motion, and
the guide pulley E is describing a circle slowly lifting the boring tools and
dropping them rapidly. When it becomes necessary to wind the tools to surface
the clutch G is thrown out of gear bringing the elliptical gear to a standstill and
the drum F being used in the ordinary way, the guide pulley E revolving on
shaft C guiding the rope O on to drum F.
The bearings D & D of the cross shaft in the elliptical wheels can be adjusted
so as to vary at will the length of stroke.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
.claim is.
1. A rapid fall of the boring tool with a slow lift, by the use of 2 pairs of
elliptical gearing wheels A B & A¹ B' arranged with 2 sliding bearings D & D¹
which carry a cross shaft C, upon this shaft is placed a rope guide pulley E, and
about this the rope O from the winding drum F is led.
T T MATTHEWS
EL MATTHEWS