Improvements in Jigs or Work Holders for Boring Brackets, Lugs, and similar Parts of Bicycles and the like.
Year: 1897

page_text: Date of Application, 15th Jan., 1897
Complete Specification Left, 19th Feb., 1897-Accepted, 17th Apr., 1897
PROVISIONAL SPECIFICATION.
Improvements in Jigs or Work Holders for Boring Brackets, Lugs,
and similar Parts of Bicycles and the like.
I, ALFRED HENRY MORTIMER CLOSE of 22ª Summer Row Birmingham Pattern
Maker, do hereby declare the nature of this invention to be as follows:-
My object is to make a jig which will carry any bracket or lug of a bicycle, and
which will hold it in position, and at any given angle for boring purposes. To do this
I cast a frame, with a bottom and two sides at right angles to it, at a convenient
space apart.
These sides are bored through and each carry a shaft, which moves in a straight
line with each other, backwards and forwards, and are fixed with screwed pins.
tightening on them from the sides.
I now cast the top sliding plate of oblong shape, having two oblong holes in it
which are fixed by two screwed pins, and in the centre of this plate I screw in the
bush which carries the hole in the centre for the drill and is also used at its base to
tighten and set the lug or bracket when in position.
$
now form a further cast frame in the shape of a cast ring having a circular swell'
or boss on each side, cast on opposite each other, two being for the purpose of carrying
two plugs for holding the lugs and which are screwed or otherwise and two for allowing
the frame to swivel on.
I cast on this frame on one of the sides which swivel, a quadrant which is set.
out to the required angles, and which is fixed at any of these positions by one or
more pins.
TO OPERATE.
The lugs or brackets can be placed either longways or crossways in this frame, by
being fixed either in the plugs which carry the swivel frame or by the plugs in the
swivel frame itself and can be fixed at any angle, by moving the frame and the
quadrant in relation to the top boring plate; and by means of using different plugs
any desired lug or bracket can be placed in position and bored at the right angle.
Dated this 14th day of January 1897
Improvements in Jigs or Work Holders for Boring Brackets, Lugs,
and similar Parts of Bicycles and the like.
I, ALFRED HENRY MORTIMER CLOSE, of 224 Summer Row, in the City of
Birmingham, Warwickshire, Pattern Maker, 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 :-
The object is to make a jig which will carry the brackets or lugs of a cycle or the
like, and which will hold it in position at any given angle for boring purposes.
In order to more clearly explain this my invention I have appended hereunto an

page_text: illustrative drawing upon which are figures and reference numbers, similar numbers
referring throughout the several views to the same thing or part.
Fig. 1, is a part sectional view in elevation of this my invention.
Fig. 2, is a sectional plan view of the device on line A-B of Fig. 1.
Fig. 3, is an end elevation of the invention.
Figs. 4 and 4 are views showing the manner in which lugs or brackets may be
fixed in the machine for boring.
To do this I cast a frame 5, with a base and two sides at right angles to it at a
convenient distance apart. These sides are bored through and each carry a shaft 6, 6
which may be adjustably fixed in position by set screws 7, 7. 8 is the top plate which
is capable of longitudinal adjustment by means of the pins 99" with elongated
holes 10, 10. In the centre of this plate is fitted the drill guide or bush 11, which
is screwed into the said plate, and having at its upper end the head 12 which serves
as a hand wheel by which the guide may be raised or lowered and also as a recess to
lodge lubricating material, 13 is a frame which swivels upon the shafts 6, 6ª. This
frame further has a quadrant plate 14 in which is a slot hole or holes 15 concentric to
the shafts 6, 6, and through which a screw or screws 16 may pass into the frame 5
for the purpose of fixing the frame 13 at any desired angle. In this frame 13 are also
provided any suitably shaped chuck or plug 17, which may be adjustably fixed by
screw pin 18, and also at the opposite side of frame is placed a screw plug 19, which
is preferably interchangeable, as to size of screw thread, with the drill guide 11, so
that if desired the latter may be substituted therefor. At the bottom of the frame 5
is fitted a changeable and removable piece 20, which may be used in some cases when
the frame 13 is convenient. The inner ends of the shafts 6 and 6ª and of the
plugs 17 and 19 and 20, and of the guide 11, are shaped as required to fit into or fit
upon the lugs or brackets to be bored, as may be determined.
In Fig. 4 it will be seen how the lug 21 may be held in position by the plug 17,
and plug 19 and also by the drill guide 11; the quadrant plate 14 being of course
fixed at the desired angle. Fig. 4, I have shown how it may be fixed for the first
boring. In this case the lower cnd may be secured in the piece 20 and the top
screw 11 brought down thereon, or, the top plate & may be removed and also the
screw plug 19, and in the place of the latter the guide 11 may be put; then by fixing
the plate 14 so that the guide 11 is in the vertical line the boring may proceed as
before.
8
Having now particularly described and ascertained the nature of this my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
1. The combination with the frame 5 having the side plugs 6, 6, and top drill
guide 11, of the swivelling frame 13 having the plugs 17 and 19 with the quadrant
plate 14 all constructed and operating substantially as set forth and shown and for the
purposes specified.
2. The combination with the frame 5 (without the top plate 8) and trunnion
shaft 6, 63, of the swivelling frame 13 with plate 14 and the drill guide 11 substituted
for the plug 19, constructed and operating substantially as set forth and shown and
for the purposes specified.
3. The combination with the frame 5, (without the frame 13) having the top
plate 8, and drill guide 11, of the changeable piece 20 substantially as set forth and
shown and for the purposes specified.
4. The general combination and arrangement of parts constituting this my
improved jig for boring brackets, lugs and other similar parts for bicycles and the
like substantially as set forth and shown.
Dated this 16th day of February 1897
CHARLES T. POWELL,
12 Cherry Street, Birmingham, Applicant's Agent.