AN IMPROVED LATHE OR TOOL. SUITABLE FOR TURNING, DRILLING, BORING, PLANING, AND SMOOTHENING, ALSO FOR GROOVING, MORTICING, AND SLOTTING, PARTS OF WHICH TOOL MAY BE APPLIED TO LATHES GENERALLY
Year: 1856

page_text: application for Letters Patent was not given within the time prescribed
by the Act.)
PROVISIONAL SPECIFICATION left by Richard Archibald Brooman at the
Office of the Commissioners of Patents, with his Petition, on the 3rd
October 1856.-A communication.
I, RICHARD ARCHIBALD BROOMAN, of 166, Fleet Street, in the City of
London, Patent Agent, do hereby declare the nature of the said Invention
for. "AN IMPROVED LATHE OR TOOL. SUITABLE FOR TURNING, DRILLING, BORING,
PLANING, AND SMOOTHENING, ALSO FOR GROOVING, MORTICING, AND SLOTTING, PARTS
OF WHICH TOOL MAY BE APPLIED TO LATHES GENERALLY," (communicated to me by
Monsieur. Fleury, a foreigner residing. abroad, to be as follows:-.
This Invention consists of an improved machine for turning, planing,
boring, drilling, slotting, morticing, and grooving, all combined in one
apparatus, arranged vertically, and having a continuous rotary motion, and
also a partially rotary or an alternating intermittent motion, with arrange-
ments for altering speed and the stroke or throw, and for reversing the action,
so that it may be employed for parts of machinery, the configuration whereof
does not allow of the tool passing over all parts of their surface or contour.
The planing part of the machinery works in a direction transverse to the axis,
and is actuated by the screw of the turning part or lathe. The shaft carrying
the face place or "chuck" and "back centre" slide to and from the bed to
allow of dillerent sizes of articles being turned, planed, &c. Counterbalance

page_text: weights are suspended by chains.passing over pulleys at the top of the bed to
'over".
keep the tool carrier and its appendages in equilibrio. Instead of the
multiplication of gearing usually employed, I communicate motion to the face
plate or chuck by an endless screw, this gives slow motion; bevil tooth gearing
imparts rotary motion; while intermediate speeds are obtained by bevil wheels,
fast and loose pulleys (and straps) fixed on the driving shaft and on a
supplementary shaft. To set the lathe in work, and stop it, a hand lever is
fixed on the upright shaft. The bed or frame has a poppet head at one end,
and framework for the spindle or mandril at the other. The tool carrier
slides in the bed in a suitable frame; sliding bearings carry the spindle to and
from the bed. On the spindle or mandril the face plate or chuck is fixed:
Reversing motion, consisting of a sliding rod and gearing, drive the endless
screw and tool carrier frame, and sliding coupling throw the screw in and out.
of gear. The planing or slotting tools are worked by bevil gearing, straps, and
pullies. The sliding rod carries moveable stops for regulating and reversing
the stroke of the plane; these stops act on a sliding lever on the upright
shaft, which works in guides; a lever is fixed to the lower part of the shaft and
works a rod carrying a cam, which works an arm carrying a weight for
shifting the straps on the pulleys. Guides on the sliding bar conduct the
straps thereon. Moveable stops working in a groove in the chuck com-
municate the desired intermittent or alternating action. The forward stroke
is regulated by means of a sector or pinion, and the two moveable studs, which
'can be retained in the desired position. The stroke of the slotting or grooving
tool is regulated and the motion reversed by arms keyed on the vertical shaft,
and actuated by cams. fixed on the tool carrier frame. I also apply the
alternating.or.intermittent movement to vertical lathes, to convert them..when
desired into circular planing machines. The various parts of this lathe,
by means of which this intermittent or alternating action is obtained, may
be applied to other lathes.