IMPROVEMENTS IN RATCHET DRILLS OR BRACES to be
Year: 1884

page_text: HERBERT AKROYD STUART Bletchley Iron Works Fenny Stratford Buckingham-
sbire Mechanical Engineer do hereby declare the nature of my invention for
IMPROVEMENTS IN RATCHET DRILLS OR BRACES to be' as follows:-
This invention relates to a means of giving to the spindles or equivalents of
Ratchet Drills or Braces a continuous rotary motion and variable automatic feed.
A reciprocating motion or partly rotating motion is given to a suitable handle
constructed so as to carry or receive one or more metal balls, or cylindrical or
conical rollers, one or more Ratchet wheels, one or more pawls one or more bands
or straps which may be made from metal or other suitable material and such bands
or straps may have teeth cut on their outsides.
The said bands or straps encircle the balls or cylindrical or conical rollers and
are arranged within the herein-before mentioned handle to act either upon the
ratchet wheel or wheels attached to the drill spindle or onto the drill spindle
direct, and are employed to, produce an opposite rotary motion to the drill on the
one motion of. the handle from that in which the handle is then moving. Or the
balls or cylindrical or conical rollers and ratchet wheels may be otherwise
arranged as will also produce the continuous rotary motion to the drill. The said
balls or cylindrical or conical rollers are kept in any desired position by means of
a piece which may form the feeding portion of the apparatus, and which is kept
stationary by an outer casing or shell which may form the cramp or support, and
by this herein-described combination either an automatic or intermittent feed
together with a continuous rotary motion may be given to the drill or other tool
arranged in the apparatus.

page_text: HERBERT AKROYD STUART Bletchley Iron Works, Fenny Stratford near
Bletchley, Buckinghamshire Mechanical Engineer do hereby declare the nature
of my invention for "IMPROVEMENTS IN RATCHET DRILLS OR BRACES" and in
what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement :-
In order that my said invention may be more fully understood I annex the
accompanying sheet of Drawings: wherein:
Figure 1. is a sectional elevation of the Ratchet Drill or Brace, and Figure 2. is
a plan of same at 1. 2. Figure 3. is a plan of the Ratchet Drill or Brace at 3. 4
and Figure 4 part section of same. Figure 6 is part elevation and part section of
mechanism for keeping the, Balls; or cylindrical or conical rollers in position; and
Figure 5 is plan of same at 5. 6.
Motion being given to the handle A. which transmits its motion to the ratchet
wheel or drill spindle B. by means of the pawls C engaging therewith; when the
handle A is on its return stroke (or coming back to its normal position) the band
or strap or equivalent D. acts onto the balls; or cylindrical or conical rollers E. aud
thereby causes them to give motion to the ratchet wheel F-but in an opposite
direction to that in which the handle A. is then moving.
The said ratchet wheel F. engages with the pawls I arranged in the ratchet
wheel B which also forms the drill spindle B. and thus the drill spindle or
equivalent B. is carried round in the same direction as the ratchet wheel F is then
moving, such motion being opposite to that of the handle A.
When the handle A is moving in the same direction as the drill spindle B the
ratchet wheel F slips on the pawls I.
K. is a threaded nut or piece which screws into the handle A. and is for
adjusting the baud or strap D. to the metal (or other suitable material) balls or
cylindrical or conical rollers E.
L. is a threaded spindle which forms a portion of the feeding arrangement,
whilst at the same time it is employed to keep the balls, or cylindrical or conical
rollers in the desired position.
M. is a female threaded nut which may have teeth cut on its outside; and from
the said nut M an intermittent or automatic feed may be obtained.
O is a shield and by this shield the automatic feed is made vairable; and
according to the amount of feed required the shield O is set, so that after the
handle A has moved a certain distance the pawl P. arranged on the spindle R.
engages with the threaded nut M. and thus produces the neccessary feed to the
"Drill"; or the feed may be given by hand in the usual manner.
N. is a sleeve into which is fitted a portion of the threaded spindle L. the said
sleeve is kept stationary by the upward pressure of the "Feed" pressing it at 7: 8.
against a cramp or equivalent.
I wish it to be understood that I do not confine myself to the exact configuration
of my said invention, neither to the material to be used for each or any of its
narts

page_text: 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
First. The application of balls, or cylindrical or conical rollers arranged in
connection with an adjustable, band or strap or their equivalent for the purpose as
herein substantially described and set forth.
Second. The combination of the mechanism whereby the balls, or cylindrical or
conical rollers are kept in any desired position substantially as herein described
and set forth.
Third. The combination of the stationary sleeve or equivalent; and threaded or
other spindle; for the purpose as herein described and set forth.
Fourth. The combination of mechanism to produce a vairable automatie feed as
herein substantially described and set forth.
Fifth. The combination of the herein described mechanism for the purpose
of giving to Ratchet Drills or Braces a continuous rotary motion and vairable
automatic feed as herein substantially described and set forth.
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