IMPROVEMENTS IN MACHINERY FOR COATING THE SURFACE OF WAX OR OTHER MOULDS WITH BLACK LEAD FOR ELECTRO-TYPING
Year: 1879

page_text: PROVISIONAL SPECIFICATION left by Edward Arnott Clowes and John
Batey at the Office of the Commissioners of Patents on the 26th March
1879.'
EDWARD ARNOTT CLOWES, of Duke Street, Stamford Street, in the County of
Surrey, and JOHN BATEY, of 4, Willington Road, Stockwell, in the County of
Surrey. "IMPROVEMENTS IN MACHINERY FOR COATING THE SURFACE OF WAX
OR OTHER MOULDS WITH BLACK LEAD FOR ELECTRO-TYPING."
An ordinary flat faced brush attached to a bar across the machine has given to
it a rapid vibratory motion, being suspended from the ends of two levers fixed on
the edges of machine by brackets in the centre. Between the fixed and loose ends
of the levers runs the driving shaft carrying the fast and loose pulleys for steam
power. Attached to this shaft are two open faced cams, upon which the levers
carrying the brush rest, the brush making two vibrations to one revolution of tho
shaft.. The levers are kept down to their work by a spiral spring attached to each
lever, which gives to the motion an elasticity of action necessary to ensure a perfect
contact upon the mould without rigidity.
The moulds to be black leaded are placed upon an open table, which is traversed
slowly beneath the rapidly vibrating brush. Motion is given to the table by means
of a screw working into a nut fixed on the underside of one end of the table. On
the end of the screw shaft is fixed a bevel wheel, which receives motion from either
of two bevel pinions which are placed on opposite side of the large wheel. The
pinions slide freely upon feathers let into a small shaft running across the end of
machine, and driven by a band from the driving shaft, but at a reduced speed.
The pinions are placed at a sufficient distance apart that they can both be out of
gear at one time, this distance being kept by small forked levers passing through
the end of machine, having their fulcrums in the centre, and connected by a
bar at the back. The forks pass over and into grooves cut in the shrouded ends of
the pinions; thus either pinion being moved into gear with the larger wheel gives
motion to the table carrying the moulds, but in opposite directions.
To make the action of reversing automatic one arm of a bell crank is connected
to the bar at the back end of levers, and the other to a rod passing through the
length of the machine and immediately underneath the table. The action is thus :-
The machine is started, the table resting at the front of the machine, a handle
attached to the reversing rod is pulled out, the bell crank moves upon its centre,
077

page_text: and one of the pinions move into gear and is kept in that position by means of a
trigger which falls down behind the arm of the bell crank; a spring acting on the
back of the trigger holds it in the position assumed until the table arrives at the
back end of the machine, when the trigger by contact with the end of table " is
lifted," and the bell crank is released and is pulled back by a spiral, bringing the
other pinion into gear. The action of the screw being reversed, the table moves
back to its first position, and by action of stops on the reversing rod and the
traversing table the pinions are thrown out of gear, and the table comes to rest.
A hopper is fixed above the top of the brush, being filled with black lead. By
an arrangement of a simple nature the plates are dusted over their surfaces with
black lead, and that on the side only which is moving towards the brush.
The action of reversing is done by a lever, effected by stops placed on the sides
of the moving table.
The whole of machine is covered in. By this means not only is hand labour
superseded, but the many and evil effects of black leading by hand are obviated.