Improved Drill Feeding Attachment for Hand-braces.
Year: 1899

page_text: Date of Application, 28th July, 1899
1000
Dond Luan
1000
PROVISIONAL SPECIFICATION.
Improved Drill Feeding Attachment for Hand-braces.
I, WILLIAM HENRY AMES, of Watsonville, California, U.S.A., Inventor, do
hereby declare the nature of this invention to be as follows:-
This invention relates to feeding attachments for hand-braces; the object of
the invention being to provide a device which enables the operator to bore any
metal with the usual metal boring drill and to advance the latter as the cut
proceeds, without depending upon pressure upon the head of the bit-stock, and
particularly to provide an improvement in the devices by which this is effected.
My invention is applicable to the usual hand-brace of usual construction having
the breast-piece or cap at the upper end, by which it can be steadied against the
person, if desired; and the usual turnable part upon the lower end adapted to
close the clamps by which the boring tool is firmly held.
My improved attachment.comprises an exteriorly screw-threaded sleeve, adapted
to pass over the turnable part, aforementioned, but made to rest upon the upper
edge thereof by means of a collar projecting inwardly and resting on an annular
shoulder formed by an enlarged internal circumference of the sleeve. The upper
face of the collar is grooved to receive balls which are covered by a similar collar
held in place by the internally screw-threaded boss of a hand-wheel screwed
over the upper end of the sleeve.
A second, larger sleeve, is internally screw-threaded for adjustment upon the
first mentioned sleeve and has an annular shoulder at its lower end to support
a ring. A similar ring is also fitted over the sleeve and between the rings, "C"
or spiral springs are fitted, and tend to keep the upper ring raised. A yoke, con-
sisting of a ring with extending arms rests upon the upper ring aforementioned,
and is capable of being secured in place by means of a projecting pin on the outer
surface of the larger sleeve, aforementioned, and which passes through a vertical
groove in the ring of the yoke when adjusting the latter in place. A partial
turn of the yoke secures it below the projecting pin. A chain, adjustable in
the arms of the yoke, depends therefrom, and supports the work to be drilled.
By revolving the hand-wheel, aforementioned, the sleeves move longitudinally,
one over the other, and the contraction is taken up and gradually imparted to
the chains by the springs; thus drawing the work closer to the drill.
A convenient device for turning the hand-wheel with the brace, consists of a
lever, pivoted to a bracket secured to the upper part of the brace, and which lever
is adapted to engage between the spokes or radial arm of the wheel. A spring
may be attached to the lever and bracket to keep the former in a normal position.
DL: 00th day of TL 1899
P. R. J. WILLIS,
Agent for Applicant.

page_text: I, WILLIAM HENRY AMES, of Watsonville, California, U.S.A., Inventor, 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 follow-
ing statement:—
My invention relates to an attachment for the ordinary wood-boring bit-hold-
ing stock or brace, by which it is rendered capable of being employed in connec-
tion with a metal boring bit.
It consists in the parts and constructions and combinations of parts, which
I will hereinafter describe and claim.
Figure 1 is a sectional view of my device. Fig. 2 is a plan view of the same.
Fig. 3 is a modification shewing the chain carrying arms and outer sleeves as
being integral and without the springs.
The bit stock or brace A may be of any usual or suitable construction, having
the breast piece or cap at the upper end, by which it can be steadied against the
person, if desired, and the part B turnable upon the lower end and adapted to
close the clamps B₁, by which the boring tool C is firmly held therein. This
being the usual construction for this class of tools is not shewn in detail..
My invention is designed to enable the operator to bore any metal with the
usual metal-boring drill and to advance the latter as the cut proceeds without
depending upon pressure upon the head of the bit-stock, and particularly relates
to an improvement in the devices by which this is effected.
D) is a sleeve which is screw-threaded upon the outside and which is of such
diameter as to loosely enclose the part B. This sleeve fits into an extension D¹,
the upper part of which is screw-threaded to fit the corresponding threads of
the sleeve 1), and the lower part extends down, so as to loosely fit around the
enlarged swell or lower end of the part B, so as to serve as a guide to retain the
parts in place. When it is desired to remove the bit C or to replace one in the
shank, it is necessary to turn the part B with relation to the interior of the
clamp B which holds the bit, and in order to obtain access to this the exten-
sion D may be screwed back upon the sleeve D, if it is near the upper end, or if
it is near the lower end it can be entirely serewed off, so as to leave the lower
part of B exposed and enable the operator to grasp it and turn it for the purpose
above stated.
When the bit is in use, the extension 1) extends down, so as to approximately
enclose the lower enlarged end of the part B and, as before stated, form with it a
guide for the lower end of the sleeve to steady it and keep it in position.
Surrounding the upper end of the sleeve D is a loosely slidable yoke d, with
projecting arms d¹, which are adapted to receive a chain or other flexible connec-
tion of sufficient length to extend down around the object to be bored, one end
being permanently attached to one of the arms d' and the other end being adjust-
ably attached to the other arm, so that when the point of the bit rests against
the object, the chain may be shortened up and attached to the arm, so as to retain
the bit in contact with the object to be drilled.
The lower end of the sleeve D' has an outwardly turned flange or bead d², and a
loose ring e surrounds the sleeve and is prevented from slipping off by the
flange. A similar slidable ring e surrounds the sleeve higher up and the
lower part of the yoke d rests upon this ring. These rings have grooves or slots
made in their inner edges to receive and hold the inturned ends of springs f,
which press outwardly against the rings with any desired force. Spiral or

page_text: other suitable springs may be used. In the present case a plurality of flat springs
is shewn, curved upon themselves, so that the ends engage the rings with an out-
ward or separating pressure. The yoke d has a vertical slot d cut in it, and
a pin h projects from the sleeve D. By pushing the yoke d down until the pin
is above it and then turning the latter it will be held down by the pin. The
action will be as follows: When the hand-wheel H is turned to screw the sleeve
D into the sleeve D', the tension of the chain which connects the part to be
drilled with the arms will cause this and the upper ring e¹ to slide down on the
sleeve D and will thus compress the springs f, and these will then exert a con-
stant pressure upon the yoke d and the connected chains and will hold the drill
to its work until the parts have returned to their normal positions, when they
may be again fed forward by turning the hand-wheel H as before.
The upper end of the sleeve D is chambered to receive the shells E and E¹
which form a casing, both parts being interiorly grooved to receive the balls F,
so that the two parts may turn freely upon each other. The part E¹ of the
casing has a flange or collar turned upon it, which fits against a corresponding
shoulder G, turned upon the upper end of the shank B, as shewn, and this guides
and steadies the upper end of the sleeve and also forms a bearing against which
the strain caused by the feeding of the drill forward, while cutting, is borne.
On the upper part of the sleeve D are projecting arms H, sufficient in number
to be conveniently grasped by the operator, so as to turn the sleeve D within the
extension I from time to time, thus drawing the extension D¹ upwardly, and
by the tension which is thus brought upon the chain the drill is advanced as the
boring proceeds, as previously described.
It will be seen that the whole pressure and the power necessary to feed the
drill forward in hard metal is supported upon the bearing E' G, while the
balls F allow the arms H and the sleeve D to be easily turned without sensible
friction and without grinding or marring that portion of the bit-stock upon
which the pressure is brought, while the bit-shank is also easily turned within
the sleeve during the operation of boring. From time to time the sleeve I)
is turned to advance the drill as the work proceeds by drawing the extension D¹
upwardly upon the sleeve D and with it the connected part in which the drill
is working.
In order to rotate the sleeve D from time to time and provide for a self feed
while the work progresses, a lever arm 0 is fulcrumed at O¹ to a plate or
support M, so that its upper end is within convenient reach of the hand which
grasps and turns the crank portion of the brace. The lower end extends between
the arms H, so as to engage one of them and advance it when the lever is thus
moved. A spring P, connected with the lever O, returns it to its normal position
when released from pressure.
The plate M has a socket piece M', which secures it to the lower vertical end
of the brace, and a hook-bolt Q, with a nut R secures the opposite end to the lower
horizontal parts of the crank-arm.
NN are two outwardly turned flanges or lugs upon the plate M, which act
as stops to limit the movements of the lever O in either direction. By this
construction it is only necessary to press the lever 0 until it engages one of
the arms H, when the latter will be turned until the springs f have been com-
pressed to the desired tension, and the lever is then released and disengaged from
the feed-wheel. The pressure of the spring continues to feed the drill forward,
and both hands are left free to handle the brace.
Having now particularly described and ascertained the nature of my said
nvention, and in what manner the same is to be performed, I declare that what
claim is:-
-
(1) A boring brace having a drill clamp at the lower end, a screw-threaded
leeve enclosing the upper part of the clamp, an interiorly screw-threaded exten-
ion fitting and mavabla
the

page_text: flexible connection from the part to be drilled and attachments upon the extension
by which the length of the flexible connection is adjusted, a two-part ball-bearing
casing fitting within the upper part of the sleeve, one portion of the casing
having a bearing upon the upper end of the drill clamp and the other part sup-
ported within the sleeve and turnable therewith.
(2) The boring-brace and drill clamp having a surrounding screw-threaded
sleeve, a correspondingly-threaded sleeve turnable thereon, a yoke fitting said
sleeve and slidable longitudinally with relation thereto, said yoke having a
flexible attachment by which it is connected with the part to be drilled, and an
elastic spring situated between the lower end of the sleeve and the yoke and exert-
ing an upward pressure against the yoke substantially as described.
(3) A boring brace and drill clamp with a surrounding turnable screw-threaded
sleeve, an exterior screw-threaded sleeve turnable upon the first named sleeve, a
voke slidable upon the exterior sleeve, springs by which it is normally pressed up-
ward and a flexible adjustable connection between the yoke and the part to be
drilled whereby the latter is held in contact with the boring tool, arms radiating
from the upper end of the interior sleeve, a lever fulcrumed to the brace adapted
to be moved into line with said arms so that the arms and sleeve may be turned
in unison with the- movement of the brace and the yoke advanced to compress
the spring substantially as described.
(4) In a drilling apparatus of the character described, a screw-threaded sleeve
surrounding the drill clamp, a similarly threaded exterior sleeve adapted to
move up and down thereon when the interior sleeve is turned, a guided yoke
slidable upon the exterior sleeve and a spring by which it is normally pressed
upward with relation to the sleeve, arms radiating from the inner sleeve, a
spring-pressed lever, a plate to which said lever is fulcrumed so as to be moved
in one direction by pressure and returned by the action of the spring and fasten-
ings by which the plate is removably secured upon the brace.
(5) In a boring and drilling tool of the character described, the screw-threaded
sleeves, the spring-pressed guided yoke movable thereon and a flexible adjustable
connection between the yoke and the article to be bored whereby the latter is
held in contact with the drill, radial arms projecting from the screw-threaded
sleeve, a plate secured to the brace having outwardly turned lugs at the lower
edge, a lever fulcrumed to the plate and movable between the lugs which limit
its motion so that the lever may be moved forward by pressure to engage the
turning arms of the sleeve and rotate the latter and a spring by which the lever
is returned when pressure upon it is released.
(6) The concentric screw-threaded sleeves surrounding the drill clamp, a yoke
slidable upon the outer sleeve, having connections with the part to be drilled, a
spring or springs by which it is normally pressed upwards, a pin projecting from
the sleeve so as to hold the yoke against the spring pressure, and a slot in the
yoke through which the pin may slide, when the yoke is turned to bring the
slot and pin in line.
D
100th do of Anvil 1900