Improvements in Deep Boring Apparatus.
Year: 1899

page_text: Date of Application, 17th May, 1899-Accepted, 22nd July, 1899
COMPLETE SPECIFICATION.
Improvements in Deep Boring Apparatus.
I, ANTON RAKY, of Erkelenz, in the Province of the Rhine, German Empire,
Engineer and Manager, do hereby declare the nature of this invention, and in
what manner the same is to be performed, to be particularly described and ascer-
tained in and by the following statement:-
The present invention relates to a lowering device for the rods of boring
apparatus, more especially to the lowering device forming a part of my Letters
Patent in Great Britain, No. 17553 dated August 8, 1896 and being particularly
represented in the Figs. 7, 8 & 9 of the drawing accompanying said application.
In this application spiral springs are arranged around pins which are kept in
proper position by the cheeks of the upper clamp of the device. When now the
upper clamp is in its upper position, it is held by these springs so that these latter
will be compressed as soon as the upper clamp is caused to get down upon the
The action of the
lower one by rotation of a lever. This occurs when the boring rod is connected
with the upper clamp and disconnected from the lower one.
device forming the object of this application is quite the same as the action of
the device forming part of my Patent No. 17553, but my improvement has the
advantage of being more simple than the original device."
I attain this simplicity in arranging the pins and the springs effecting the lifting
of the upper clamp within openings of the said clamps, whilst hitherto the pins
and the spiral springs were mounted upon these clamps, so that the mechanism
firstly was more complicated, and secondly was of great dimensions.
My invention is represented in two different forms of execution in Figs. 1 & 2
of the accompanying drawing.
Proceeding to describe the drawing, A and B are the two clamps of the lowering
device, as particularly described in my original patent. These clamps are moveil
against another and are connected to or disconnected from the boring rod D by
means of screws d having right and left screw threads.
In Fig.
the upper clamp is provided with two cylindrical openings b; within
each of these openings a pin i having a collar is arranged. A spiral spring h
surrounds the pin i and is arranged so as to press on its bottom side against the
collar of the pin, and on the top side against a closing piece k arranged at
the top end of the opening.
The pins are of such dimensions that when the collar presses against the
bottom of the opening 6 they project down the lower surface of the clamp for a
5 distance corresponding to that which the upper clamp has been raised.
The
Fig. 2 represents a construction similar to that represented in Fig. 1.
difference in this construction with respect to Fig. 1 is that the pins are located
within the lower clamp instead of in the upper clamps. The spiral spring h
acting upon the collar presses directly against the bottom of the opening b
O whilst the collar ¹ itself presses against the closing piece arranged at the top
of the opening; when the screws d are loosened the pin i acts upon the upper
nataire

page_text: The effect of this device is quite the same as the effect of the original device
forming a part of my forecited patent. In both positions the upper clamps
are pressed against the boring rod and afterwards the lower clamps are loosened
by rotations of the screws d. Then the boring rod d owing to its own weight
descends somewhat whereby the pins contrary to the action of the springs h are
pressed into the clamps; thereupon the lower clamps are fixed, the upper clamps
are loosened and the pins i press the upper clamps into the position shown in
the drawing.
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 a lowering device for the rods of boring-apparatus having two clamps
arranged one over the other upon the boring rod and being adapted to be fixed
to, loosened from and displaced along the same, the combination with said
clamps, cylindrical openings b provided in either of them, pins i having
collars arranged within said openings, spiral springs h¹ surrounding the pins i,
closing pieces provided at the top end of the cylindrical borings, for the pur-
pose and substantially as set forth.
k
Tlated this 17th day of Var 1890.
GEO. H. RAYNER,
37, Chancery Lane, London, Agent for the Applicant.