IMPROVED MECHANICAL CONTRIVANCES INCREASING THE EFFECT OF MOTIVE POWER
Year: 1861

page_text: LETTERS PATENT to Frederick Tolhausen, Civil Engineer & Patent
Agent, of 35, Boulevart Bonne Nouvelle, Paris, in the Empire of France,
for the Invention of "IMPROVED MECHANICAL CONTRIVANCES INCREASING
THE EFFECT OF MOTIVE POWER."-A communication from François Berger,
residing in the Town of St. Etienne Empire of France.
ealed the 31st January 1862, and dated the 6th August 1861.
PROVISIONAL SPECIFICATION left by the said Frederick Tolhausen at
the Office of the Commissioners of Patents, with his Petition, on the
6th August 1861.
I, FREDERICK TOLHAUSEN, Civil Engineer & Patent Agent, of 35, Boulevart
Bonne Nouvelle, Paris, in the Empire of France, do hereby declare the
nature of the said Invention for "IMPROVED MECHANICAL CONTRIVANCES IN-
CREASING THE EFFECT OF MOTIVE POWER," being a communication from François
Berger, a person resident in the Town of St. Etienne, Empire of France, to
be as follows:-
This Invention relates to mechanical combinations for increasing the effect
of motive power. For this purpose 1 have contrived an apparatus in which
the crank, with its "dead points," is entirely dispensed with. This apparatus
consists of a toothed wheel, which whilst rotating receives its impulsion at any
point of its rotation except that portion of it termed "dead points;" said
toothed wheel has inclined or ratchet teeth, into which a pair of racks, with
"trundle" or round teeth are made to gear, the racks being set together in a
frame, one on each side of the wheel, and parallel to the reciprocating motor,

page_text: from which the rotation is derived. Supposing thus the two racks to have a
reciprocating motion given to them by means of the piston rod of a steam
engine, one of the racks will gear into the wheel teeth, and set the wheel to
rotate, whereas the other will escape in the manner of a click and ratchet, and
on the return stroke the rack first mentioned will escape, and the second rack
will continue the impulsive motion, they both being set moveable in their
frame, and kept down on the wheel by springs or any other equivalent
device only.
The apparatus may also be varied by having the ratchet teeth applied
to the two pieces of the wheel instead of being set on the circumference,
the two crowns of ratchet teeth being acted on alternately by a forked click
contrivance.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Frederick Tolhausen in the Great Seal Patent Office on the
5th February 1862.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, FREDERICK
TOLHAUSEN, Civil Engineer and Patent Agent, of 35, Boulevart Bonne
Nouvelle, Paris, in the Empire of France, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Sixth day of August, in the year of our Lord One
thousand eight hundred and sixty-one, in the
year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto me,
the said Frederick Tolhausen, Her special licence that I, the said Frederick
Tolhausen, my executors, administrators, and assigns, or such others as I,
the said Frederick Tolhausen, my executors, administrators, and assigns,
should at any time agree with, and no others, from time to time and at
all times thereafter during the term therein expressed, should and lawfully
might make, use, exercise, and vend, within the United Kingdom of Great
Britain and Ireland, the Channel Islands, and Isle of Man, an Invention for
IMPROVED MECHANICAL CONTRIVANCES INCREASING THE EFFECT OF MOTIVE POWER,"
a communication from François Berger, a person resident in the Town of
St. Etienne, Empire of France, upon the condition (amongst others) that I,
the said Frederick Tolhausen, my executors or administrators, by an instru-
ment in writing under my, or their, or one of their hands and seals, should
particularly describe and ascertain the nature of the said Invention, and in
what manner the same was to be performed, and cause the same to be filed

page_text: in the Great Seal Patent Office within six calendar months next and
immediately after the date of the said Letters Patent.
NOW KNOW YE, that I, the said Frederick Tolhausen, do hereby declare
the nature of the said Invention, and in what manner the same is to be
performed, to be particularly described and ascertained in and by the following
statement thereof :-
}
This. Invention relates to mechanical combinations or contrivances for
increasing the effect of motive power. For this purpose I have contrived an
apparatus in which the crank, with its "dead points," is entirely dispensed
with. This apparatus consists of a toothed wheel, which whilst rotating.
receives its impulsion at any point of its circumference or rotation except that
portion which is termed the "dead points." Said wheel has inclined or ratchet
teeth, into which a pair of racks with "trundle" or round teeth are made to
gear, the racks being set together in a frame, one on each sido of the wheel,
and parallel to the reciprocating motor from which the rotation is derived.
Thus supposing the two racks to have a simultaneous and identical reciprocating.
motion given to them, e.g., by means of the piston rod of a steam engine, one
of the racks will gear into the wheel teeth and set the wheel to rotate, whereas
the other rack will escape in the manner of a click and ratchet, and on the
return stroke the rack first mentioned will escape, and the second rack will
continue the impulsive motion, both of the racks being set moveable in their
frames, and kept in gear with the wheel by springs or any other equivalent
yielding device. .
This arrangement is shewn in elevation and plan at Figs. 1 and 1° of the
annexed Sheet of Drawings. A, toothed wheel, into which the racks B, B²,
gear alternately at x, x¹, motion being derived from the steam piston C by
means of the piston rod D. E, E', are slotted cross pieces, in which the racks
are free to move for the purposes above set forth; F, F, springs by which the
two racks are connected, and which tend to keep them in gear with the
wheel A.
This apparatus may also be varied by having the ratchet teeth applied to
the two faces of the wheel, instead of being set on the circumference, the two
crowns of ratchet teeth being acted on alternately by a forked click contrivance.
This second arrangement is shewn on the annexed Sheet of Drawings, Figs. 2
and 2, in end and side elevation; G, G', two plates, which are loose on the
driving shaft; these plates carry driving pawls or clicks I, I, gearing into the
toothed crowns K, K', on the wheel H. Motion is obtained similarly to
the manner above described, by means of the forked rod R, which is secured
to the revolving plates G, G¹.

page_text: Fig. 3 represents a third variety of my contrivances, which is particularly
applicable to machinery driven by the foot. c is a connecting rod, by which
an alternate rotary motion through part of a revolution is or may be given to
the lever d, which turns about d', and is fixed on the spur wheel e. A
balance weight 9 (or spring) is attached to the other end of the lever, so as to
effect the return stroke of the rod c and lever d. The spur wheel e gears into
a similar wheel a, which turns loose on the shaft i. On this a ratchet
wheel b is keyed, which is acted upon by one or more clicks h, which are fixed:
near the circumference of the spur wheel a; and thus, it will be easily under-
stood that (by the help of a fly wheel) a continuous rotary motion is imparted-
to the shaft i by merely depressing the lever d at intervals.
In witness whereof, I, the said Frederick Tolhausen, have hereunto
set my hand and seal, this First day of February, A.D. 1862.
T ΠΟΥ ΠΑΤΟΡΑΣ
ILTICEN
F. TOLHAUS
(L.S.)