AN IMPROVEMENT OR IMPROVE- MENTS ON CLOCKS, WATCHES, AND OTHER TIME-KEEPERS, USED EITHER AT SEA OR ON LAND
Year: 1793

page_text: LESLIE'S SPECIFICATION.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, ROBERT
LESLIE, of Merlin Place, in the Parish of Saint James, Clerkenwell, in the
County of Middlesex, Watch Maker, send greeting.
WHEREAS His most Excellent Majesty King George the Third did, by
His Letters Patent under the Great Seal of Great Britain, bearing date at
Westminster, the Thirteenth day of December, in the thirty-fourth year of His
reign, give and grant unto me, the said Robert Leslie, His especial licence that
I, the said Robert Leslie, during the term of years therein expressed, should
and lawfully might use, exercise, and vend, within England, Wales, and the
Town of Berwick-upon-Tweed, my Invention of "AN IMPROVEMENT OR IMPROVE-
MENTS ON CLOCKS, WATCHES, AND OTHER TIME-KEEPERS, USED EITHER AT SEA OR
ON LAND;" in which said Letters Patent there is contained a proviso, obliging
me, the said Robert Leslie, by an instrument in writing under my hand and
seal, to cause a particular description of the nature of my said Invention, and
in what manner the same is to be performed, to be inrolled in His Majesty's
High Court of Chancery within one calender month after the date of the said
recited Letters Patent, as in and by the same (relation being thereunto had)
may more fully and at large appear.
NOW KNOW YE, that in compliance with the said proviso, I, the said
Robert Leslie, do hereby declare that my said Invention of an improvement
or improvements on clocks, watches, and other time-keepers, used either at

page_text: a
"
C. C. are moved nearer together or farther apart by the Screw E. which has one end c with a right hand screw and the other with a left hand Sauv The Pendulum. receives
horizontal motion from the Clock, by applying the fork of the Pallett cieto of the Springs C. C. or to a Wire fix'd in the Bar B. for that purpose, and is
prevented from having any other motion but a houjontal circular one, by the soy Steel Pin in the Spring F. which Spring has one end fasten'd to the Bottom of the
block Cuse, and the pin at the other end goes into a Conic hole in the botton of the Bar B to regulate the Clock faster the Springs C.C. we moved farther apart and Slower
If the Screw E and that part of the Bax B which is sturen & Springs C.C are of Brass the propertys of the compound or Gridiron Pendulum
nearer
together
Figure 2. is the same as
Figure 1 only having
a
Wheel instead of 1.
2
Is
a
.
-
1. and the Bar B.
rolling Pendulum & is a piece of Metal of any length and deaineter that !! suit the size of the Clock best, it is turn'd with two small Groves around it like
a double Pulley which Groves receive two Springs one of which is represented by B.B. and +. ther supposed to be right behind it C.C. a frame, which supports the Springs which
are drawn tighter by the Screws D.D. to regulate the block, slower and stacken'd make it faster_
3. Is a Regulator for Clocks which has, the property's of the Gridion Pendulum A a rass Wheel with a Groove like a
Pulley the groove is.
is flat at the bottom and wide
enough to receive a Watch Spring which has one end fasten'd to the Wheel at . and making two or more horns round the Wheel as the length of the Pendulum
be left high enough to cut teeth in for the,
reg-
1
edge of the wheel
may
0
requires the other end passes thro' a Slit in the Cock at B and down to the ¿ E one.
ulating Screw C. to work in .
Is a Scapement for Clocks A the Swing Wheel B the Pallets which have only pieces to stop the Wheel from running at O.C. the motion being given to the Pen-
dulum by the Springs E.E. with one end rivetted to the Pallets and at the othe the rollers D. D. which the Wheel ucts on and raises them altunately.
1
A Watch sexpement A. the Horizontal Wheel. B. a Liver which is pressed again the Wheel by the Spung C which Spring has also a Pin to prevent the Wheel
from running D. a Pallet on the aubour of the ballance which receives the impulse from the prong F of the Lever E. a small Spring or Click which holds the
Lover up when raised by the Wheel and is disengag'd by a pin by the side the Pallet inkin the Lever is disengay'd from the spring & its prong E falls on
the Pallet with all the force of the Spring C. and when it has done actor: me pallet the long end of it at G disengages the pin in the spring C from
the Wheel and it is ready for another motion - If the liver has two I us to act on the Tullet and two to Stop against the Spring E as represented
in Figure 2 the Wheel will only moor vere for very for the situation of the
The Sticking part of the Clock A the great Wheel & a plate on the side of + with notches to determine the number of Shokes in the common way B. a Star
Wheel with Pins to raise the Hammu. C. a Ballance to regulate the Shiking by the point of the Teeth of the Star Wheel acting
on
the Arbor of the Ballance
at I which is a dead Scapement so that the stammer D makes one Shoke to every second vibration and when the mimber is struch the whole is stoped by one
end of the Lever E. falling into the notch in plate G. and the other against the gin in the rim of the Ballance The motion of the Ballance is to be regulated by a
Spring.
17
A method to determine the number of Shokes in repeating Clocks, which is certain than the common Snail. A, a Wheel with Seventy two Deeth and is moved
by a Pallet from the Minute Wheel, or other communication, one Tooth in every hour there is six Tins in every side of the Wheel at twelve teeth distance against
which the Click E stops which blick being on the rack determines the distanc B the rack made in the common way and now in a situation to strike four .
Figure 1 and Figure 2 a Regulator for the Shiking it is a hollow bro made like a treing Bavell and put on the arbour of the Pinion which moves the rack as represented at C.
Figure 1 the Box has a division from the center to neuir the i'm on one side as reperated in Fiqure 2 there is a quantity of Sand put in it which every revolution has to
pass through an Aperture at D., the velocity is determind either by the & anticy of Sand or the size of the Aperture .__
Figure 1. the plan of a Nautical Watch with hoo dials one to shew the time it the place Sail'd from and the other the Time of the present place 80 the great
Wheel 10 and 10 the center pinions of the two Dials 60 the center Wheel of the Movement 56 the third Wheel & its Pinion 56 the Fourth Wheel and 7 its
pinion 15 the Scape Wheel and 7 its pinion - Figure 2 the Dial, which hus big circles for the Hours and Minutes - One for the Seconds, and one for the day of month;
Fide, or any other purpose --
Figure 1. A method of
edges
of
the
of giving morion To
w
joden'd to one end of the Cylinder
Drawing represents a storijental one B.B. the two
Cylinder which the Teeth of the Wheel, A acts, on, C an dem or in
one end of which horns up and passes through a hole
in the upper Frame plate as shewn in Fig: 2 where D. represents the plate with a hole in the end of the lever at C to receive the Pendulum or ballance Spring
at the distance of about one turn from its outward end and is made fast & a Pin the inward end of the Spring is fasten'd to a Collet on the Arbor of the
ballance and the outward and to a Stud in the plate so that by giving notion to the Cylinder and the lever on it moving the Spring with them and
the Spring gives motion to the ballance. -
a
perce,
way
back
o
wower
The Repeating part of a Watch, which is all contained between the Dial and the pillar plate A the Rack B. the Sail for the Hours C. the Snail for the
Quarters D the Hammer E a ballance which regulates the Stroke instead " the Train of wheels in other watches & a rack for the Quarters H a Spring with
-near the end which prevents the rach pom fliping back more than one tooth est every stroke of the stammer to make the Watch repeat, the rack
is push'd down by the Pendant, and is urg'd back by the Spring I which has equal to the Main Spring in other Watches, as the rack returns it acts on the
hammer tail at II to draw the Hammer in and is prevented prom doing it too quick by a Small Spring
•Small Spring at F. which acts on the Arbour of the ballance as a
Scopement, which turns the ballance sill it passes through a small notch in the Actour, the rack then slips of the Hammer Tail and is prevented from flying all the
by the Spring II which the Shoke of the Hammer disengages and A, rack again falls on the Hammer tail for another operation when the stour is shuch
a pin in the end of the Hour rack takes hold of the Quarter Rack & se takes it along with it to strike the Quarters the sound of which is differed
from that of the Hour by the Spring I which the Quarter rack when begins to move presses out and if the Hammer Shikes on a Bell the Pin
M unites it, if on a Case the end at N checks it and alters the sound, the clue is regulated by Spring and is only acted on by y? Hammer as it is
drawn in the Spring F giving way as it makes the shoke, it passes the tour of the ballance without moving
A Mainspring for Clocks, Watches or Timekeepers of any kind. Figures. 1. the Spring which may be a Square Bar of such thickness as the move-
ment requires, it is bent ramd the movement outside the pillars and is the frame Plates, the two ends at B. press against a Stud D fastened to
and is acted on
one or both the Plates the middle of the Spring is cut as represented.
by the Pruce C. on the principle of the Spring and tumbler of a Gun
Lock on the peice C is find the rack 1. see Fig 2. Figure 2. A. a rack Bx Pinion on the great Wheel D by a Square on the pinion B. the Watch is wound
up, or
l
a
it
by pushing the rack by the Pendant of the Wakh to F. the Spring is thin by the Price C. press'd inward and its reaction moves the rack to the other side
which turns the Pinion B and the great Wheel D and of course the whole mivement the rack is most conveniently placed between the Fial and Pillar Plate.
A method of winding up a Watch by the Pendant 1 a ratch on the Squire where the Key should go to wind in the common way B the Pendunt which
being moved in and out alternately turns the ratch by means of the two Cakes C. C. which are on the ends of a fork fastened to the Pendant 17 a Click
and Spring to prevent the ratch from returning. -
enrolled drawing is partly colore
Drawn Stone by Malby do Sc:.s