IMPROVEMENTS IN MULTIPLE CRANK APPARATUS FOR DRILLING, BORING, OR SIMILAR OPERATIONS
Year: 1873

page_text: LETTERS PATENT to William Robert Lake, of the Firm of Haseltine,
Lake, & Co., Patent Agents, Southampton Buildings, London,
for the Invention of "IMPROVEMENTS IN MULTIPLE CRANK APPARATUS
FOR DRILLING, BORING, OR SIMILAR OPERATIONS."-A communication
from abroad by Charles Francis Ritchell, of the City and State
of New York, United States of America, Mechanical Engineer.
Sealed the 4th April 1873, and dated the 14th February 1873.
COMPLETE SPECIFICATION filed by the said William Robert Lake
at the Office of the Commissioners of Patents, with his Petition
and Declaration, on the 14th February 1873, pursuant to the 9th
Section of the Patent Law Amendment Act, 1852.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, WILLIAM
ROBERT LAKE, of the Firm of Haseltine, Lake, & Co., Patent Agents,
Southampton Buildings, London, send greeting.
WHEREAS I am in possession of an Invention for "IMPROVEMENTS
IN MULTIPLE CRANK APPARATUS FOR DRILLING, BORING, OR SIMILAR. OPERATIONS,”
and have petitioned Her Majesty to grant unto me, my executors,

page_text: administrators, and assigns, Her Royal Letters Patent for the same, and
have made solemn Declaration that it has been communicated to me
from abroad by Charles Francis Ritchell, of the City and State of New
York, United States of America, Mechanical Engineer.
NOW KNOW YE, that I, the said William Robert Lake, do hereby
declare that the following Complete Specification, under my hand and
seal, fully describes and ascertains the nature of the said Invention, and
in what manner the same is to be performed, in and by the following
statement, reference being had to the accompanying Drawing forming
a part of this Specification :-
This Invention relates to an improved construction and arrangement
of multiple or serial cranks whereby any number of cranks very closely
set can be simultaneously operated for mechanical purposes, and has
for its objects increased rapidty of production, superiority, uniformity,
and diminished cost of the work performed.
DESCRIPTION OF THE DRAWING.
Figure 1 is a side elevation; Figure 2 is an end elevation; and Figure
3 is a plan of a drilling or boring machine constructed according to
this Invention. Figures 4 and 5 represent a side elevation and plan
of a modification of the same. Similar letters refer to corresponding
parts throughout the Drawing.
The ordinary right angled crank is not well adapted for simultaneous
operation where it is desired to use a number of cranks closely set, as
for instance, in boring backs for small brushes and the like, therefore
I use oblique or inclined cranks or a curve which shall be equivalent
to the same, and the nature of this Invention consists in combining a
series of such oblique or curved cranks in a given space with regard to
their simultaneous operation. Each oblique crank A consists of an
inclined portion A' intermediate between the arms of pins a, a¹, which
are parallel in direction to each other, and form, with the portion A, an
angle of 135°, more or less, or a curve equivalent thereto.
I combine a series of these inclined or oblique cranks in any number
desired, and in any proximity or geometrical relation to each other,
according to the space on which the rotating tools have to be concentrated.
These rotating tools whether used for cutting, boring, drilling, or similar
operations may be attached to the ends of the arms or pins a, in any

page_text: convenient manner, or made in one piece with the said arms, and the
arms a are passed through and retained in position by a perforated plate
or frame C, or any other suitable contrivance for conveniently holding
the said arms and tools in any desired relative position; the other arms
a¹ of the cranks are passed through or partially entered into a similar
plate or frame D, so arranged by means of one, two, or more ordinary
cranks F, or eccentrics whose radius is equal to the working radius of
each of the oblique cranks A, that each point in the plate D shall
describe a circle in the plane of the plate.
The cranks F are journalled to supports or standards G and are
arranged to be moved forward longitudinally, if desired, to give an
advancing motion to the cranks A and their connected tools, or the
cranks F and A may be fixed in their planes of rotation, and the article
or object to be operated on may be moved or pressed against the said
operating tools, either by hand or automatically, as may be desired.
These cranks F are to be suitably connected to the motive power and
to each other by belts or otherwise.
-
The oblique cranks, as above described, are preferably made in double
series or sets, either as represented in Figures 1, 2, and 3, or as in
Figures 4 and 5, but they, may be constructed in a single series, as
shewn by either the right or left series in Figures 1 and 3 taken
separately. If desired a reciprocating rotary motion can be com-
municated to the cranks F instead of a continuous rotary motion.
This peculiar construction of oblique cranks is probably the only
arrangement whereby an unlimited number of cranks can be operated,
however close together, with unlimited leverage on each crank, while no
cogs, pullies, or belts are used and no complicated machinery required.
It will be readily seen that by simply replacing the plates C and D by
similar plates, but of different pattern, any desired combination of
operating tools, drills, or points can be obtained for drilling the finest
watch plate or the largest boiler plate, and exact uniformity of pattern
will be secured.
.
Having thus fully described the said Invention as communicated to
me by my foreign correspondent, and shewn how the same may be
conveniently and advantageously carried into practice, I wish it under-
stood that I do not claim the Invention of the oblique or inclined crank
in itself, but I claim,―

page_text: First. The combination of two or more oblique cranks A, arranged
for simultaneous operation for the purpose of boring, drilling, reaming,
or other mechanical operations, as herein set forth and for the purpose
described.
Second. The combination of a series of oblique cranks A, with the 5
stationary plate C and the moveable plate D to retain in position and to
operate the said cranks, as herein set forth.
In witness whereof, I, the said William Robert Lake, have hereunto
set my hand and seal, this Thirteenth day of February, in the
year of our Lord One thousand eight hundred and seventy-three. 1
Witness,
JAS. EDWARDS,
8, Southampton Buildings,
London.
W. ROBT. LAKE. (L.S.)