AN IMPROVED APPARATUS FOR DRILLING SERIES OF SMALL HOLES AND FOR OTHER LIKE OPERATIONS
Year: 1868

page_text: PROVISIONAL SPECIFICATION left by William Robert Lake at
the Office of the Commissioners of Patents, with his Petition, on
the 14th October 1869. A communication from abroad by
Charles Francis Ritchel, of Chicago, Illinois, United States of
America.
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I, WILLIAM ROBERT LAKE, of the "International Patent Office,"
No. 8, Southampton Buildings, Chancery Lane, in the County of
Middlesex, Consulting Engineer, do hereby declare the nature of the
said Invention for "AN IMPROVED APPARATUS FOR DRILLING SERIES OF
SMALL HOLES AND FOR OTHER LIKE OPERATIONS," a communication, to be
as follows:-
The ordinary right angled crank is not adapted for combined devices
in which a number of cranks very closely set are simultaneously
operated, as for instance, in boring plates for small brushes and the like.
I have therefore adopted an obtuse angled or inclined crank to obtain
the above and other similar objects, and the nature of my Invention
consists in combining a series of these obtuse angled or inclined
cranks in a given space in such a manner as to operate all of them
simultaneously.
My obtuse angled or inclined crank consists of an inclined shaft
provided at its ends with arms or pins, which are parallel to each other,

page_text: and form with the shaft an angle of about one hundred and thirty-five
degrees. I combine a series of these cranks in any desirable number
and proximity to each other according to the space in which the
rotating points of suitable tools have to be concentrated.
The boring, drilling, or other suitable tools are attached to the ends
of the arms or pins at one end of the cranks in any convenient
manner, or formed solidly with the said arms, which are passed through
a stationary plate or frame, or any other suitable fixture arranged in
the most convenient manner for the purpose, and mounted on a suitable
frame. The other arms or pins of the cranks are passed into or through
a movable plate or frame arranged in any suitable manner, the face
or working plane of the said plate, frame, or fixture being placed at a
right angle to the said arms. This movable plate is rotated by means
of ordinary crank arms having their working radii equal to the working
radii of the inclined cranks. These crank arms are formed with
suitable journals and are supported in standards, and are provided, if
necessary, with shoulders for the purpose of keeping the moving plate
all the time in precisely the same plane. These arms may be coupled
by rods, and operated by a belt passing over a pulley fixed on the
shaft of one of the said arms, the said belt being driven by a steam
engine or other power.
When motion is communicated to the crank
arms the movable plate commences to rotate, moving the arms of the
inclined cranks simultaneously, and rotating the points of the tools
attached to the ends of the said arms; the plate or other object to be
operated upon being brought into contact with or pressed against the
said points by hand or otherwise, as desired.
The obtuse angled or inclined cranks instead of being single, as above
described, may be made double or operative at both ends, and when
combined in series are kept in the proper position by two stationary
plates, frames, or other suitable fixtures, the movable plate or frame
to which power is applied being in this case arranged in the centre of
the double series of rotating points or tools.
If desirable a reciprocating rotary motion may be communicated to
the driving cranks instead of a continuous rotary motion.