IMPROVEMENTS IN MACHINERY OR APPARATUS FOR WORKING SCREW PRESSES BY STEAM POWER FOR CUTTING, STAMPING, PERFORATING, AND SUCH LIKE PURPOSES
Year: 1876

page_text: LETTERS PATENT to Emile Ravet, of Birmingham, in the County of Warwick,
Engineer, for the Invention of "IMPROVEMENTS IN MACHINERY OR APPARATUS
FOR WORKING SCREW PRESSES BY STEAM POWER FOR CUTTING, STAMPING,
PERFORATING, AND SUCH LIKE PURPOSES."
Sealed the 1st December 1876, and dated the 16th June 1876.
PROVISIONAL SPECIFICATION left by. the said Emile Ravet at the Office
of the Commissioners of Patents on the 16th June 1876.
" IM-
EMILE RAVET, of Birmingham, in the County of Warwick, Engineer.
PROVEMENTS IN MACHINERY OR APPARATUS FOR WORKING SCREW PRESSES BY STEAM
POWER FOR CUTTING, STAMPING, PERFORATING, AND SUCH LIKE PURPOSES."
This Invention consists of an improved arrangement of machinery by which screw
presses generally worked by manual labor can be actuated and used by means of
steam power.
To carry out my Invention I apply or attach to the top of the screw of an
ordinary screw press a fly wheel, and to this fly wheel is fastened a driving pulley.
Behind the press is fixed a countershaft, which by means of two pairs of mitre
wheels drives two smaller upright shafts, to the top of each of which an eccentric is
fastened. A slide pin is attached to each of the eccentrics and the driving band
is fastened to one of these, then taken round the driving pulley on the press and
fastened to the her slide pin. A screw goes through each of the eccentrics which
regula slide pin, and gives any length of stroke that may be required.
The slide pins on the eccentrics are set so that when one pulls the band the
other looses it and by that means the screw of the press is worked up and down.
Power is communicated to the screw press by means of the countershaft which
is in connection with the steam engine.
SPECIFICATION in pursuance of the conditions of the Letters Patent_filed by
the said Emile Ravet in the Great Seal Patent Office on the 16th December
1876.
"IM-
EMILE RAVET, of Birmingham, in the County of Warwick, Engineer.
PROVEMENTS IN MACHINERY OR APPARATUS FOR WORKING SCREW PRESSES BY STEAM
POWER FOR CUTTING, STAMPING, PERFORATING, AND SUCH LIKE PURPOSES."
This Invention consists of an improved arrangement of machinery by which
screw presses generally worked by manual labor can be actuated and used by steam
Dower.

page_text: To carry out my Invention I apply or attach to the top of the screw of an ordinary
screw press, as shewn in Fig. 1, a fly wheel.A, and to this fly wheel is fastened a
driving pulley B. At a short distance from the press is fixed a countershaft C, which
by means of two pairs of mitre wheels or any similar arrangement drives two small
upright shaft D, D, Figs. 1 and 2, to the top of each of which an eccentric E, E,
is fastened. A slide pin F, F, is attached to the top of each of the eccentrics, and
a driving band or chain or rods is fastened to one of these pins then taken round
the driving pulley on the press and fastened to the other slide pin. A screw goes
through each of the eccentrics which regulates the slide pin, and by means of which
any length of stroke that is required may be obtained. The slide pins on the
eccentric are so set that when one draws the band the other slackens it so moving
the driving pulley on the press backwards and forwards and giving the required
motion to the screw of the
press.
Thus power is communicated to the press by means of the countershaft and
eccentrics which may be driven from any convenient line of shafting in connection
with the steam engine.
Having thus described the nature of my Invention, and the manner in which
the same may be carried into effect, I wish it to be distinctly understood that I
do not confine myself to the exact details as herein described, but what I do claim
as my Invention is the principle of applying steam power to ordinary presses
usually worked by hand by means of the double eccentrics, as herein-before described
and shewn on Drawings.
In witness whereof, I, the said Emile Ravet, have hereunto set my hand
and seal, this Twenty-third day of October, in the year of our Lord One
thousand eight hundred and seventy-six.
EMILE RAVET. (L.S.)
Witness,
D. P. WRIGHT.