Improved Apparatus to be Employed in the Drilling or Boring of Metal Bodies.
Year: 1889

page_text: Date of Application, 17th Aug., 1889
Complete Specification Left, 17th May, 1890-Accepted, 28th June, 1890
PROVISIONAL SPECIFICATION.
Improved Apparatus to be Employed in the Drilling or Boring of
Metal Bodies.
We GEORGE BUTLER of 1 Lombard Street Birmingham in the County of Warwick,
Cycle Fittings Manufacturer, and THOMAS KENDRICK, of Sparkhill, near Birmingham,
in the County of Worcester, Draughtsman, do bereby declare the nature of our said
invention to be as follows :-
Our improvements relate to what in commerce are known as "ratchet braces," such
as are used by engineering artificers for drilling holes in metal bodies and in places
inaccessible to drilling machines.
The usual construction and use of a "ratchet brace" is perfectly well known.
In the apparatus constructed according to our invention we dispense with the usual
ratchet teeth, and also with the pawl or click which engages with the ratchet teeth, and
with the spring which keeps the pawl or click against the ratchet teeth.
We make that part of the outside of the body of our apparatus or brace which
usually has the ratchet teeth on it cylindrical, and we cut in this cylindrical part a
slot or groove parallel to the longitudinal centre line of the said body; this slot varies
in depth from nothing at one end to the depth of about a quarter of an inch in an
ordinary size. In the deep end of the slot we place a roller preferably of hardened
steel, of nearly the same diameter as the deepest part of the slot. We form the
bandle of the apparatus or brace with a cylindrical boss at the end farthest from the
part grasped by the workman's hand. This boss is bored so as to fit easily over
the cylindrical body before mentioned and also over the roller when this roller is at
the deepest part of the slot. When the handle is partly rotated on the body in the
direction which is to give motion to the drill, the roller is caught by the friction of
the inside of the boss of the handle, and caused to run or roll a little way towards the
shallow end of the slot, where it gets jammed between the inside of the handle boss
and the body thus the said body
:
forced to partake of the movement of the handle,
and the drill is partly rotated in the required direction. When the handle is pulled
back the roller is instantly released from its jammed position and rolls hack slightly
towards the deep end of the slot thus permitting of the easy movement of the handle
boss over the body. We place a small flat spring between the roller and the body
which keeps the said roller always in position and ensures the certainty of the action
above described.
Our apparatus is silent in its working: the amount of lost motion at the beginning
of each effective movement of the handle is also much diminished it is in fact reduced
to a practically infinitesimal amount.
DI 11 A
1000
THOS. KENDRICK,
Agent for Applicants.
COMPLETE SPECIFICATION.
Improved Apparatus to be Employed in the Drilling or Boring of
Metal Bodies.
We, GEORGE BUTLER of 1 Lombard Street, Birmingham in the County of Warwick
Cycle Fittings Manufacturer and THOMAS KENDRICK of Sparkhill near Birmingham
in the County of Worcester Draughtsman do hereby declare the nature of our said
invention and in what manner the same is to be performed, to be particularly described
and ascertained in and by the following statement :-
Our improvements relate to what in commerce are known as " ratchet braces," such
as are used by engineering artificers for drilling holes in metal bodies and in places
inaccessible to drilling machines.

page_text: The usual construction and use of a "ratchet brace" is perfectly well known.
In the apparatus constructed according to our Invention we dispense with the usual
ratchet teeth, and also with the pawl or click which engages with the ratchet teeth, and
with the spring which keeps the pawl or click against the ratchet teeth.
We make that part of the outside of the body of our apparatus or brace which
usually has the ratchet teeth on it cylindrical and we cut in this cylindrical part
a slot or groove parallel to the longitudinal centre line of the said body, this slot
varies in depth from nothing at one end to the depth of about a quarter of an
inch in an ordinary size. In the deep end of the slot we place a roller preferably
of hardened steel of nearly the same diameter as the deepest part of the slot. We
form the handle of the apparatus or brace with a cylindrical boss at the end farthest
rom the part grasped by the workmans hand. This boss is bored so as to fit
easily over the cylindrical body before mentioned and also over the roller, when
this roller is at the deepest part of the slot. When the handle is partly rotated
on the body in the direction which is to give motion to the drill, the roller is
caught by the friction of the inside of the boss of the handle and caused to run
or roll a little way towards the shallow end of the slot where it gets jammed
between the inside of the handle boss and the body, thus the said body is forced to
partake of the movement of the handle and the drill is partly rotated in the
required direction. When the handle is pulled back the roller is instantly released
from its jammed position and rolls back slightly towards the deep end of the slot
thus permitting of the easy movement of the handle boss over the body. We
place a small flat spring between the roller and the body which keeps the said
roller always in position and ensures the certainty of the action above
described.
Our apparatus is silent in its working the amount of lost motion at the beginning
of each effective movement of the handle is also much diminished, it is in fact reduced
to a practically infinitestimal amount.
And in order that this our said Invention may be more fully understood we shall
now proceed more particularly to describe the same and for that purpose we shall
refer to the several figures on the sheet of drawings hereunto annexed, the same
letters of reference indicating corresponding parts throughout all the figures.
Fig. 1 is a view in elevation upon a small scale, of our Invention.
Fig. 2 is a view in elevation sectional about full size.
Fig. 3 is a part of the same view.
Fig. 4 is a plan view in section.
Figs. 5 and 6 parts detached.
a, is the body of the ratchet brace which is cylindrical, provided with the slot or
groove b inclined, at the deep end we place the roller c.
e,
Figs. 2 and 4-The handle d, we construct with the cylindrical boss
this passes
conveniently over the cylindrical body a, and over the roller c,-when the said roller
is at the deepest part of the incline of slot b, but finding a bearing (lightly) thereon.
When this Invention is applied to its purpose the handle d, is partly rotated on the
body a, in that direction which will give proper motion to the drill f, the roller c by
the bearing or friction of the inside of the boss e, of the handle d, is forced to travel
a little way towards the shallow end of 6, when it becomes jammed between e, and a,
so that the said body a, is forced to partake of the movement of the handle d, and the
drill f, is partly rotated in the proper direction to effect its purpose.
When the handle d is forced back the roller c, becomes instantly released from the
position in which it was held, and rolls back to its normal position, thus allowing the
easy movement of the handle d, and boss e, over the body a, and so continuing until
the object is effected.
The bowed flat spring g, Figs. 3. 4. 6 may be employed between the roller C, and
the body a, to ensure position and certainty of action.
The above being our Invention we do not limit ourselves to the precise details or
arrangement of parts, as shewn on the accompanying sheet of drawings, but to the
principle shewn and set forth.

page_text: Having now particularly described and ascertained the nature of our said inven-
tion, and in what manner the same is to be performed, we declare that what we
claim as our Invention of
*
Improved apparatus to be employed in the drilling or boring of metal bodies."
The construction and combination of; a cylindrical body a, with inclined groove b,
for receiving the roller c, and spring 9. The handle d, with cylindrical boss sub-
stantially as and for the purposes described in the foregoing Specification and shewn
on the accompanying sheet of drawings.
e,
THOS. KENDRICK,
Agent for Applicants.