Year: 1887

page_text: Date of Application, 16th Mar., 1887
Complete Left, 16th Dec., 1887
Complete Accepted, 20th Jan., 1888
1, WILLIAM HENRY DOUGLAS of Stourbridge in the County of Worcester Watch-
maker, do hereby declare the nature of this invention to be as follows:-
In the construction of one form of instrument. I employ a solonoide and a core
similar to the regulator in an are lamp. The movement of the core is used to move a
curb so as to shorten or lengthen the spring of a pendulum or the regulating spring
of a balance of a timepiece in the following manner. The current passing in the
solonoide attracting the core is proportional to its quantity of current. This is made
to accelerate or retard a time piece as follows. The core of the solonoide is attached
to the curb or regulator of the timepiece the curb moving up and down the suspension
spring of the pendulum in sympathy with the variation of the current passing through
the solonoide and actuating the core accelerates or retards the time piece in proportion
to the movement of the core.
Or the core may be attached to the curb of a regulating spring of the balance of a
time piece with the before mentioned result.
Another form of instrument consists in employing the means used in Ammeters to
measure currents and is applied in the following manner. The swing given to the
pointer or other moving indicator of the Ammeter is made to move a regulator or
curb of a bair spring used to regulate a timepiece. The curb or regulator of the
timepiece being actuated by the Ammeter.
Dated this 15th day of March 1007
PAYNE & TALBOT,
4 & 5, Arcade Chambers, Corporation Street,
Birmingham,
Agents for the Applicant.

page_text: COMPLETE SPECIFICATION.
Improved Instruments for Measuring Electric Currents
I WILLIAM HENRY DOUGLAS of Stourbridge in the County of Worcester Watch-
maker do hereby declare the nature of this invention and in what manner the
same is to be performed, to be particularly described and ascertained in and by the
following statement, reference being had to the accompanying drawings and to the
letters and figures marked thereon -
In the construction of one form of instrument. I employ a solenoid and core some-
what similar to the regulator in an arc lamp the movement of the core is used to
move a curb so as to shorten or lengthen the spring of a pendulum or the regulating
spring of a balance of a time piece in the following manner.
The current passing through the solenoid repelling or attracting the core is propor-
tionate to its quantity of current. This is made to accelerate or retard a time piece as
follows.
The core of the solenoid is attached to the curb or regulator of the time piece the
curb moving up and down the suspension spring of the pendulum in sympathy
with the variation of the current passing through the solenoid and actuating the core
accelerates or retards the timepiece in proportion to the movement of the core.
Or the core may be connected with the curb of a regulating spring of the balance
of the timepiece with the before mentioned result.
Another form of instrument consists in employing the means used in ammeters to
measure currents and is applied in the following manner.
The swing given to the pointer or other moving indicator of the ammeter is made
io carry a regulator or curb, this curb of the time-piece being actuated by the
ammeter.
The curb or regulator sliding up and down the suspension spring accelerates or
retards the time piece in proportion to the current flowing through the ammeter.
I do not confine myself to any particular clock mechanism in connection with this
invention but I prefer clockwork which requires seldom winding or is self winding
and for that reason I use by preference an electrical clock.
Referring to the accompanying drawings I will describe, firstly, my invention with
the use of an animeter.
Similar letters upon the Drawings refer to similar parts.
Fig. 1 is a side view shewing the curb.
Fig. 2 a side view shewing the ammeter.
Fig. 3 a front view shewing the clock face.
(a) is the ammeter (6) the fixed magnet theroin and (c) the suspended one to which
is attached the pointer (d) working over the dial (e) which is marked with a scale of
amperes. Upon the same shaft as that which carries the suspended magnet (c) and
pointer (d) is fixed a curb (7) and counter poise (y). The relative positions of the
curb (f) counter poise (9) and pointer (d) on the shaft (8) are shown in Fig. 4.

page_text: Ine action is as follows.
The electric current passing through the ammeter causes the magnet (b) to repel
the magnet (c) the extent of which repelling is indicated by the pointer (d) and by
this movement of the magnet (c) the curb (f) upon the suspension spring (1) of the
pendulum (i) is lowered as shewn in dotted lines Fig. 1, this shortens the spring (h)
and affects the time of the clock.
Fig. 3 shews a clock dial which I can use in conjunction with my invention. The
large dial (k) forming a calander the dial (4) shewing the day of 24 hours duration
and the dial (m) the seconds.
Fig. 4 sheet 2 is a back view of the shaft shewing as before stated the relative
positions of the curb (f) the counterpoise (g) and pointer (d) but the drawing
represents the application of a solonoid (n) and core (o) to the apparatus.
Fig. 5 sheet 2 is a side view of one of my arrangements with solonoid and core,
(n) is a solonoid and (o) a core suspended by the cord (p) on the wheel (w) so as to be
drawn into the solonoid in sympathy with the electrical current passing through the
solonoid.
To this wheel (0) is attached the curb (f) through the curb (f) passes the
suspension spring (h) of the pendulum (f) of the clockwork (g) is a counter poise of
the curb (f).
The action is as follows.
The electrical current passing into the solonoid (n) attracts the core (o) and causes
the cord (p) to turn the wheel (1) in the same proportion and thus lengthen the
extent of the free play of the suspension spring (h) thus altering the beat of the
clock in proportion to the extent to which the curb (f) is raised.
In order to maintain a register of the extent, or quantity of electrical current
which is thus affecting the clockwork I use a disc (t) big. 5 upon which is indicated
a scale of amperes for measurement and upon the same shaft as that which carries the
wheel (e) is fixed the weighted pointer (d) formed as a counterpoise to the core (o).
Thus the fall of the core (o) will move the pointer (d) upon the disc (t) just to the
extent of the fall and indicate in amperes the quantity of electricity which has passed
through the solonoid.
Having now particularly described and ascertained the nature of my said
Invention and in what manner the same is to be performed I declare that what I
claim is:
Firstly. The combination of a solonoid and core in connection with a curb to
accelerate or retard a clock movement whereby I am enabled to measure electric
currents substantially as herein set forth and specified.
Secondly. The application of a curb to the swinging pointer of an ammeter
connecting it with the suspension spring of a pendulum substantially us herein set
forth and specified.
T1 141
D
1007
PAYNE & TALBOT,
7, Cherry Street, Birmingham,
Agents for the Applicant.