Improvements in Ratchet Drilling Machines.
Year: 1890

page_text: Date of Application, 9th Aug., 1890
Complete Specification Left, 19th Dec., 1890-Accepted, 7th Mar., 1891
PROVISIONAL SPECIFICATION.
Improvements in Ratchet Drilling Machines.
I, WILLIAM KIMBER, of Steventon, in the County of Berks, Engineer, do
hereby declare the nature of this invention to be as follows:-
My invention relates to improvements in ratchet drilling machines, or ratchet
brace for the purpose of drilling holes in any metallic substance.
This invention consists of the usual handle and frame with the ratchet wheel
having a self feed caused by a frictional pall, the pressure being kept on the pall
by a spring, the said spring being regulated for various pressures by a milled
headed set screw. The mechanism is placed inside a box which said box is screwed
on to the top side of the handle. The notch in the flange is where the pall works,
the flange being attached to a sleeve. Inside the said sleeve is provided a feather
way which fits over a nut, so that when the drill is in motion the pressure is put
on at every rotation. When the handle is going the opposite way to the drill,
the drill is moving, and when the pressure is put on sufficiently the spring gives,
and permits the pall to slip out of the notch, thereby regulating the pressure by
the screw to suit any size drill.
It will be understood that the foregoing is given by way of illustration only,
and that the shapes, materials, and proportions of the various parts may be varied
in many ways within the scope of my invention.
Dated this 9th Joy of Aurust 1890
J. P. BAYLY,
18, Fulham Place, W., Agent for the Applicant.
COMPLETE
SPECIFICATION.
Improvements in Ratchet Drilling Machines.
I, WILLIAM KIMBER, of Steventon, in the County of Berks, 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 invention relates to that type of hand-power drilling machines known as a
ratchet brace, and it consists in a self acting feed, the object being to render such
machines more efficient and more easily operated.
I attain this end by attaching to the feed screw a flange having a notch into
which a pawl sliding in a box formed on, or fixed to, the handle and kept up by a
suitable spring engages, and so makes a frictional contact between the said hand
lever and the feed screw. To regulate the pressure of this frictional contact a
screw is provided capable of increasing or decreasing the elasticity of the
spring.
In the accompanying drawing
Figure is a broken view in side elevation-partly in section of a ratchet
brace, embodying my invention, and Figure 2 is a broke view in plan thereof―
partly in section. Figure 3 is a broken view in side elevation showing the
application of my invention to another type of ratchet brace, and Figure 4 is a
broken view in plan thereof.
Throughout the several views similar parts are marked with like leiters of
reference.
On to the shank A of the handle carrying the drill socket, rotating. mechanism,
and feed screw, is formed or fixed a box B in which is fitted a sliding pawl C

page_text: adapted to engage with one or more notches & cut or formed in the flange d' of a
collar D mounted on the feed screw E. The sliding pawl C is pressed forward by
a spiral spring F the elasticity of which is capable of being adjusted by means of
the milled-headed setscrew G, threaded into the end of the box B, and acting on
the spring F through the washer g. The collar D is connected to the feed screw E
by means of a feather and featherway as illustrated in the accompanying drawing,
and it is confined by means of a flanged plate H screwed, or otherwise fixed, to the
top part of the shank A of the hand lever.
It will be understood by anyone conversant with these machines, that the ratchet
brace shown by Figures 1 and 2 of the accompanying drawing has a female feed
screw, and that the one shown by Figures 3 and 4 of the accompanying drawing
has a male feed screw which necessitates a variation in the application of the
Hanged collar D.
The notch or notches d in the flange d' of the collar D, and the engaging end of
the sliding pawl C are so fashioned that the collar D and nut E are operated to put
on the feed by the return movement of the handle of the brace, the pawl travelling
with the collar and nut during the forward or active movement of the handle. The
pressure of the sliding pawl is so regulated by the setscrew G that when sufficient
feed is obtained the pawl slips out of the notch or notches in the flange on the
collar, the drill being rotated until the pawl again engage with the notch or notches
in the said flange.
I wish it to be particularly understood that I do not limit myself to the precise
details of construction herein set forth and illustrated by the accompanying
drawing, but hold myself at liberty to make such changes and alterations as fairly
fall within the spirit and scope of my invention.
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
1st. The improvements in ratchet braces, substantially as and for the purpose
herein set forth.
2nd. The combination with a ratchet brace of the frictional self acting feed,
constructed, arranged, and operating as set forth.
;
3rd. In a ratchet brace, the combination with the handle drill socket, rotating
mechanism, and feed screw of the flanged collar baying one or more notches in its
periphery of the sliding pawl adapted to engage with the notch or notches in the
said flange; of the spring acting on the said pawl; of the setscrew adapted to
adjust the elasticity of the said spring; and of the flanged plate, confining the
flanged collar all constructed, arranged, and operating as and for the purpose set
forth.
4th. The combination with a ratchet brace, of the pawl C adapted to slide in at
box B formed on, or fixed to, the shank of the handle of the brace; of the
spring acting on the said pawl; of the setscrew G adapted to regulate the
tension or elasticity of the spring F; of the flanged collar D mounted on the feed
screw and connected therewith by a feather and featherway, or their equivalents,
and having one or more notches & cut or formed therein; and of the plate H or its
equivalent confining the flanged collar D; all combined, arranged, and operating,
as and for the purpose set forth.
Dated this 10th dow of Dannhau 1900
ROBT. ED. PHILLIPS, M.I.M.E., &c,.
Consulting Engineer and Patent Agent, 70, Chancery Lane, W.C.,
Agent for the Applicant.