IMPROVEMENTS IN THE CONSTRUCTION
Year: 1863

page_text: LETTERS PATENT to Charles Grant Kelvey, of Rock Ferry, in the County
of Chester, Watch Manufacturer, and William Holland, of the same
Place, Manager, for the Invention of "IMPROVEMENTS IN THE CONSTRUCTION
Sealed the 1st March 1864, and dated the 4th September 1863.
PROVISIONAL SPECIFICATION left by the said Charles Grant Kelvey and
William Holland at the. Office of the Commissioners of Patents, with
their Petition, on the 4th September 1863.
We, CHARLES GRANT KELVEY, of Rock Ferry, in the County of Chester,
Watch Manufacturer, and WILLIAM HOLLAND, of the same Place, Manager,
do hereby declare the nature of the said Invention for "IMPROVEMENTS IN
THE CONSTRUCTION OF CHRONOMETERS AND OTHER TIMEKEEPERS," to be as
follows:-
Our improvements, which are mainly applicable to or serviceable in pocket
chronometers and timekeepers, relate to the construction and arrangement
of certain of the working parts which constitute the escapement, and to
the use or addition of a moveable plate for adjusting escapements of different
kinds.
Several of the major parts of an escapement constructed according to our
Invention are made similar to or the same as the like parts in chronometer
and duplex escapements. Thus the ruby roller is like that employed in a
duplex escapement, the impulse roller like those of duplex or chronometer:

page_text: escapements, and the escape wheel the same as that used in the ordinary
chronometer. The pallets however we make of a new shape or form so that
they will not detach like the "lever" or "London chronometer," but will
give impulse. Both ends of such pallets are made or formed with inclined
planes, and with inclined planes only, and the escape wheel drops thereon,
and gives impulse alternately to the opposite ends, the body is similar to those
pallets in use in other escapements. The lever which is connected to the
pallets is also new, having a blunt pointed end instead of the fork or notch
now in use. In action the pallets detain the escape wheel, and at the same
time press the point of the lever gently on the ruby roller secured on the axis
of the balance, thus communicating impulse to the balance at the time it is
unlocking or setting at liberty the escape wheel, which when released gives
its next and direct impulse to the balance by the pallet fixed in the impulse
roller. The point of the lever rests on the ruby roller, fixed on the balance
axis as already mentioned, gently by pressure received, from the escape wheel
and pallets, it is therefore always ready to drop or slide into the notch of
the ruby roller as the balance vibrates, and it, the lever, gives the said balance
an impulse either way and prevents "setting."
For the purpose of adjusting our. above described escapement,-and-escape-
ments generally, a detached "cock," on the pillar plate is fitted with, or there
is attached thereto a moveable piece or plate, in which there is an aperture or
space for the pallet axis. The said moveable piece or plate can most con-
veniently be secured by screwed pins or bolts for they will serve also to alter
the position of the said moveable piece or plate, and thereby adjust the
escapement.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Charles Grant Kelvey and William Holland in the Great
Seal Patent Office on the 4th March 1864. ...
TO ALL TO WHOM THESE PRESENTS SHALL COME, we, CHARLES
GRANT KELVEY, of Rock Ferry, in the County of Chester, Watch-- Manu-
facturer, and WILLIAM HOLLAND, of the same Place, Manager, send
greeting.
WHEREAS Her most Excellent Majesty. Queen Victoria, by Her Letters
Patent, bearing date the Fourth day of September, in the year of our Lord One
thousand eight hundred and sixty-three, in the twenty-seventh year of Her
reign, did for Herself, Her heirs and successors, give and grant unto us, the

page_text: said Charles Grant Kelvey and William Holland, Her special licence that we,
the said Charles Grant Kelvey and William Holland, our executors, adminis-
trators, and assigns, or such others as we, the said Charles Grant Kelvey and
William Holland, our executors, administrators, and assigns, should at any
time agree with, and no others, from time to time and at all times there-
after 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 "IMPROVE-
MENTS IN THE CONSTRUCTION, OF CHRONOMETERS AND OTHER TIMEKEEPERS," upon the
condition (amongst others) that we, the said Charles Grant Kelvey and
William Holland, our executors or administrators, by an instrument in writing
under our, or their, or one of our or 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 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 we, the said Charles Grant Kelvey and William:
Holland, do hereby declare the nature of our said Invention, and in what
manner the same is to be performed, to be particularly described and ascertained.
in and by the following statement (that is to say):-
Our improvements, which are mainly applicable to or serviceable in pocket
chronometers and timekeepers, relate to the construction and arrangement
of certain of the working parts which constitute the escapement, and to.
the use or addition of a mioveable plate for adjusting escapements of different.
kinds.
Several of the major parts of an escapement, constructed according to our
Invention, are made similar to or the same as the like parts in chronometers
and duplex escapements; thus, the ruby roller is like that employed in a duplex.
escapement, the impulse roller like those of duplex or chronometer escape-.
ments, and 'the escape wheel the same as that used in: the ordinary chrono-
metér; the pallets, however, we make of a new shape or form so that they will
not detach like the "lever or "London chronometer," but will give impulse;
both ends of such pallets are made or formed with inclined planes and with
inclined planes only, and the escape wheel drops thereon, and gives impulse
alternately to the opposite ends, the body is similar to those pallets in use.
in other escapements. The lever which is connected to the pallets is also new,
having a blunt pointed end instead of the fork or notch now in use. In
action the pallets detain the escape wheel, and at the same time press the.
point of the lever gently on the ruby roller secured to the axis of the balance

page_text: thus communicating impulse to the balance at the time it is unlocking or
setting at liberty the escape wheel, which, when released, gives its next and
direct impulse to the balance by the pallet fixed in the impulse roller. The
point of the lever rests on the ruby roller fixed on the balance axis, as already
mentioned, gently by pressure received from the escape wheel and pallets, it
is therefore always ready to drop or slide into the notch of the ruby roller as
the balance vibrates, and it, the lever, gives the said balance an impulse either
way and prevents "setting."
For the purpose of adjusting our above described escapement and escape-
ments generally a detached "cock," on the pillar plate is fitted with or there
is attached thereto a moveable piece or plate, in which there is an aperture or
space for the pallet axis. The said moveable piece or plate can most con-
veniently be secured by screwed pins or bolts, for they will serve also to alter
the position of the said moveable piece or plate and thereby adjust the
escapenient.
That our said Invention may be clearly understood we have hereunto appended
a Sheet of explanatory Drawings, in which Fig. 1 represents a view of a
watch constructed according to our Invention, the improved parts being shewn
in the position they would assume or occupy when the balance was moving
the pallets and lever to unlock the escape wheel; Fig. 2 is a view of our
escapement parts turned over, the various parts being shewn as when the
escape wheel is detained by the bottom pallet, and the point of the lever is
resting on the outside of the ruby roller; Fig. 3 is another view, similar to
Fig. 2, of the same parts with the escape wheel detained by the bottom pallet,
the lever being in the notch of the ruby roller, and the balance moving
round to the right to allow the "short drop" to be made, and Fig. 4 a similar
view of the same parts as Figs. 2 and 3 with the escape wheel detained
by the leading pallet, and the balance moving round to the left to give or
allow the "long drop" or impulse. These views shew the positions the
several parts assume when a watch or timekeeper is at work, and they will
convey to the mind of a person acquainted with timekeeping machines the
requisite knowledge to enable him to make or construct a watch or other
timekeeper according to our Invention.
We refer, however, by letters to the different parts that there may be
no mistake, and distinguish like parts in all the views by the same letters.
a, shews the escape wheel; b, the pallets; c, the lever; d, the balance
wheel; e, the impulse roller with impulse pallet f; 9, the ruby roller; h,
represents the detached or rather detachable cock with moveable plate or
piece, in or against which the pallet, axis works. The screwed pins j

page_text: serve to move the plate or piece i, further from or to the outer end of the
"cock "h, and thereby adjust the escapement, with which the said cock and
plate are used. Other means than screws may be employed for moving the
plate or piece i.
Having now described the nature and particulars of our said Invention, we
would have it understood that what we claim is,―
Firstly, constructing, arranging, and combining the several parts consti-
tuting the escapement of watches and other timekeepers, substantially
in the manner herein set forth, and shewn on the accompanying Sheet of
Drawings.
And, secondly, the use of a detachable cock on the pillar plate with a
moveable piece or plate thereon, for adjusting the escapements of watches and
other timekeepers, substantially as herein set forth and shewn on the accom-
panying Sheet of Drawings.
In witness whereof, I, the said William Holland, for myself and the
aforesaid Charles Grant Kelvey, have hereunto set my hand and
seal, this Second day of March, in the year of our Lord One thou-
sand eight hundred and sixty-four.
In the presence of
JOHN THOMSON KING,
Patent Agent,
4, Clayton Square,
Liverpool.
WILLIAM HOLLAND. (L.S.)