Improvements in Machinery or Apparatus for Drilling and Rhymering Girder and similar Work.
Year: 1887

page_text: Improvements in Machinery or Apparatus for Drilling and
Rhymering Girder and similar Work.
1. CHARLES FREDERICK DIXON, of the Cleveland Bridge and Engineering Company
Darlington, in the County of Durham, 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 :-
This invention has for object the drilling and rhymering of girder and other similar
work more expeditiously than heretofore has been usual. For this purpose, upon a bed
or gauntry are mounted two simply constructed radial drilling machines, the arrange-
ment being such that these machines shall be capable of being readily moved towards
and from each other and of being adjusted to their work. They may be driven
separately but I prefer to drive them together as hereinafter described with reference
to the annexed drawings, in this case; it may in some cases be desirable to be able to
stop either machine to admit of change of tool or in the event of a break down, and for
this purpose provision can be made and is shewn in the drawings. The selfacting feed
ordinarily applied to the drill spindles is suppressed, thereby obviating the loss of time
occasioned in engaging and disengaging it, and in bringing the pressure upon tho
drills before actual work commences, and in lieu thereof there is substituted the well
known hand lever feed provided with counterweight for causing the tool to retire
quickly on completion of each operation.
The girder or other article to be drilled or rhymered is placed upon bogies on a
railway arranged crosswise of the bed or gauntry upon which the drilling machines
are mounted, thus the work can be moved easily so as to bring the required parts
within range of the drilling and rhymering machines between which it passes, and
which being radial machines are therefore capable of working on portions of a
girder or other object situated some distance apart without interfering with each
other.
In the annexed drawings, Fig. 1, is a side elevation, Fig. 2, an end elevation partly
in section, Fig. 3 a detail plan of the bed or gauntry shewing portions of the two drilling
machines mounted thereon. Figs. 4 and 5 shew a side elevation and a cross sectional
elevation respectively of the same. A, is the bed or gauntry. B, and C, are radial drilling

page_text: and rhymering machines mounted thereon, and movable towards and from each other by
the screws B and C, and the levers B2 and C2 respectively. D, D, are the driving pulleys
communicating motion to the shaft E, which runs down the centre of the bed A, from
this shaft by means of the gears F, and G, motion is imparted to the shafts that extend
respectively up the pillars I, and I, of the respective machines and from which motion
is conveyed in the usual way to their respective vertical spindles J, K, that carry the
drills or other tools. The radial arms L, M, are movable on the pillars H, and I, to any
desired position, by the screws N, O, respectively, P, Q, are levers for pressing the
tools to their work, and R, S, are counterweights for withdrawing them immediately on
completion of the drilling and rhymering operations. T, T, are clutch arrangements
by means of which or their equivalents the motion of either drill spindle can be
arrested independently of the other when it is required to change the tools. U, shews
the end of one of the bogies in the side elevation Fig. 1 with transom for carrying the
work V.
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
1. Mounting upon a bed or guantry such as A, two radial drilling and rhymering
machines as described, the arrangement being such that they can be adjusted and can
operate with equal facility upon a wide or narrow girder or other article to be drilled
or rhymered, placed upon or over the said bed or gauntry in the manner set forth with
reference to the drawings annexed.
2. The use of a lever feed motion applied to a radial arm drilling and rhymering
machine substantially as hereinabove described with reference to the drawings
annexed.
3. The combination of parts or mechanism described and shewn for the pur
specified.