IMPROVEMENTS IN DRILLING MACHINES FOR ROCK AND COAL
Year: 1886

page_text: Date of Application, 10th July, 1886.
"Complete Left, 10th Mar., 1887.
Complete Accepted, 15th Apr., 1887.
AUGUSTUS EDWARD STAYNER of Millhouses near Sheffield do hereby declare the
nature of my invention for IMPROVEMENTS IN DRILLING MACHINES FOR ROCK AND
COAL to be as follows:-
The Construction of Screw Nuts in two parts so formed and arranged that they can
readily be separated or opened so as to admit of the propelling screw of the machine
being withdrawn or placed in any required position without the necessity of working
the Screw through the Nuts by the usual process of turning it to the right or left.
Both parts of the Nuts being capable of complete removal from contact with such
propelling screw by being hinged or secured in Slide Boxes. In the latter case the
opening or closing of the Serew Nuts being actuated by double acting screws
eccentrics clamps or other suitable means.

page_text: I, AUGUSTUS EDWARD STAYNER of Millhouses, near Sheffield 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:—
The construction of Screw Nuts in two parts so formed and arranged that they can
readily be separated or opened so as to admit of the propelling screw of the machine
being withdrawn or placed in any required position without the necessity of working
the screw through the nut by the usual process of turning it to the right or left, both
parts of the nuts being capable of being removed completely from contact with such
propelling scrow, by being hinged or secured in slide boxes. In the latter case the
opening or closing of the screw nuts being actuated by double acting screws, eccentrics,
clamps, or other suitable means.
In order to render the mode of carrying out this invention clear I annex a sheet of
drawings, in which like letters refer to like parts in each figure.
Fig. 1. is a plan of the split nut and slide box complete.
Fig. 3. is an end view of fig. 1.
Fig. 2. is a side view of the slide box without the split nut.
Fig. 4. is an end view of Fig. 2.
Fig. 5. is a plan of the two parts of the split nut.
Fig. 6. is a side view of Fig. 5.
Fig. 7. is an end view of Fig. 5.
In fig. 1. S. is a boss for attaching the slide box to the tube of the Ratchett and
T. represents part of the tube in section.
In Figs. 5. 6. 7. N. N. are the two parts of the split nut which slide in the
openings O. of the slide box shown in fig. 2.
In Figs. 1 and 3-P. represents a screw with a right hand thread at one end and a
left hand thread at the other end-The lugs L. L. on the two parts of the split nut
shown in figs. 1. 3. 5. 6. 7. are tapped with right and left hand thread to suit the
threads on the end of the screw P.
By means of the screw P. the two parts of the split nut are brought in contact
with or disengaged from, the main propelling screw of the Ratchett, which passes
through the bosses K. R. on the slide box.
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-
The arrangement of slide box and split nut arranged for boring machines sub-
stantially in the manner described and illustrated herein.
Dated this 9th day of March 1887.