IMPROVEMENTS IN TRANSMITTING POWER
Year: 1854

page_text: LETTERS PATENT to Daniel Collet, of Paris, 25, Rue de Courcelles, for
the Invention of "IMPROVEMENTS IN TRANSMITTING POWER."
Sealed the 25th May 1855, and dated the 4th December 1854.
PROVISIONAL SPECIFICATION left by the said Daniel Collet at the
Office of the Commissioners of Patents, with his Petition, on the
4th December 1854.
I, DANIEL COLLET, of Paris, 25, Rue de Courcelles, do hereby declare the
nature of the Invention for "IMPROVEMENTS IN TRANSMITTING POWER" to be
as follows:-
The apparatus consists of one or more screws, to which motion is given by
any suitable motive power. On each of the screws is a nut, which is so con-
structed as to open and release the screw on arriving at the end, so that it
may return again to the commencement of its course. In connection with
the nut is a rack, which works into a toothed wheel on the axis, to which
motion is to be communicated. This toothed wheel is so arranged that in
one direction it is fast on the axis, but in the other direction it revolves
loosely thereon, so as to allow the rack and nut to return back to the starting
point.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Daniel Collet in the Great Seal Patent Office on the
4th June 1855.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, DANIEL
COLLET, of Paris, 25, Rue de Courcelles, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Fourth day of December, in the year of our Lord
One thousand eight hundred and fifty-four, in the eighteenth year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto me, the
said Daniel Collet, Her special licence that I, the said Daniel Collet, my
executors, administrators, and assigns, or such others as I, the said Daniel
Collet, 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 "IMPROVEMENTS IN TRANSMITTING POWER,'
upon the condition (amongst others) that I, the said Daniel Collet, by an
instrument in writing under my hand and seal, 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 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 Daniel Collet, 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 (that is to say):
The apparatus consists of one or more screws to which motion is given by
_any_suitable motive power. On each of the screws is a nut, which is so con-
structed as to open and release the screw on arriving at the end, so that it may
return again to the commencement of its course. In connection with the nut
is a rack, which works into a toothed wheel on the axis to which; motion is to
be communicated. This toothed wheel is so arranged that in one direction it
is fast on the axis, but in the other direction it revolves loosely thereon, so as
to allow the rack and nut to return back to the starting point.
Having thus stated the nature of my said Invention, I will proceed to
describe the manner of performing-the-same.-

page_text: a, a, is the framing of the machinery; 6 is an axis, having fixed thereon the
fly wheel c. The axis 6 receives motion from a 'steam engine or other power
either by a connecting rod attached to the crank pin d or otherwise. On the
axis b is fixed the cog wheel e, which takes into and drives the cog wheels f,f,
which are fixed on the axes of the two screws g, and in like manner may any
number of screws receive motion and aid in transmitting the power from the
axis b.to.the axis t in like manner to the two screws 9, which are shewn in
the Drawing. Each of the two screws g gives motion to a toothed rack h, and
the rack h in its turn gives motion to the shaft or axis t, by means of a cog
wheel u. The cog wheel u is not fixed to the shaft or axis t, but is capable of
turning freely thereon when moved in one direction; but when moved in the
other direction, the drivers u', which are pressed on by springs, take hold of
the teeth u², formed on a boss, fixed to the shaft or axis t, and thus is the
axis or shaft caused to rotate by the to and fro movements of the toothed
racks h. Motion is communicated to the toothed racks h by means of the
screws in the following manner :-i, are cross heads, which are moved to
and fro by the screws g. The cross heads are attached to the toothed racks h
by means of the bars a, a,, as shown; the cross heads i, i, are guided in their
movements by the fixed guides j, on which the cross heads slide. By the rota-
tion of the screws g the two cross heads i will be moved to and fro, and they
arc constantly caused to move in opposite directions; hence, when one is
actuating the axis or shaft t, the other will be returning, and its rack will not
be acting on the cog wheel u so as to turn the axis or shaft t. The moveable
nut, by coming against one of the stops o, is freed from the screw, and by
coming against the other stop, is closed upon and embraces the screw.
the cross head commands the rack h, it is caused to engage into and move
the axis t, when, in consequence of the nut being closed, the cross head is
drawn by the screw; but when the cross head, having reached the end of its
course, has to return, the nut being freed, as shewn, the cross head is drawn
back, by means of weights acting on the racks h, which on this way are not
acting on the axis t. Now, in order that the action of the stop o on the out-
side levers which are caused to close or open the nut be as accurate and elastic
as needful, the stop which closes the nut is arranged as shewn in the vertical
section. a, part of framing, through which passes the slide p, which carries
the stop o. The tail of the slide opposite to the stop is held by a chain q, at
the end of which is attached a weight 7, which causes the stop to be pushed
As

page_text: forward; the other end of the slide is fastened by a caoutchouc or other
elastic band or wire s, which is so placed as to draw it back when not pushed
forward by the weight r. The weight r is also held by the end of a chain q',
which is fixed at its other end to the cross head i, so that when the cross head i
approaches a, the weight r is caused to act upon o, so as to push it forward to
meet it, and when i recedes, it pulls up the weight, and allows the elastic
bands to draw o back into its resting position. There is also a small catch y,
which when o has receded back springs up, so as to keep it in its resting posi-
tion until the projecting arm z on the cross head, by coming forward, frees o,
and allows it to spring forward against the outside levers of the moveable
nut in the cross head.
In witness whereof, I, the said Daniel Collet, have hereunto set my
hand and seal, this First day of June, in the year of our Lord One
thousand eight hundred and fifty-five.
Witness,
T. BASSET.
DANIEL COLLET. (L.S.)