Year: 1887

page_text: Date of Application, 6th Apr., 1887
Complete Left, 6th Jan., 1888
Complete Accepted, 10th Feb., 1888
I, WILLIAM HENRY DOUGLAS of Stourbridge in the County of Worcester, Watch-
maker, do hereby declare the nature of this invention to be as follows:-
These improvements consist in applying a rotating pendulum to a detached lever
escapement duplex or horizontal escapement.
An additional lever attached to the escapements propels the rotating pendulum
backwards and forwards, at each beat of the escapement in the case of the lever
and horizontal escapements and at each alternate beat in the case of the duplex
escapement.
The pendulum is detached from the escapement at each beat of the clock.
The advantage gained by these improvements is that by reason of the slow rotating
movement of the pendulum a clock can be made without additional wheels to keep in
action for a much greater length of time with once winding, also that by reason of
the pendulum being detached I obtain a most accurate measurer of time.
The clock may be regulated by means of a curb placed near the top of the suspension
spring.
PAYNE & TALBOT,
4 & 5, Arcade Chambers,
Corporation Street, Birmingham,
Agents for the Applicant.

page_text: 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 drawings and to the letters and figures
marked thereon :-
:-
The Improvements consist in applying a rotating pendulum to a detached lever
escapement, duplex escapement or horizontal escapement.
An additional lever attached to the escapement propels the rotating pendulum
backwards and forwards at each beat of the escapement in the case of the lever
and horizontal escapements and at each alternate beat of the escapement in the case
of the duplex escapement.
The pendulum is detached from the escapement at each beat of the clock.
The advantage gained by these improvements is that by reason of the slow rotating
movement of the pendulum a clock can be made without additional wheels to keep in
action for a much greater length of time with once winding, also that by reason of
the pendulum being detached I obtain a clock which is a most accurate measurer of
time.
The clock may be regulated by means of a curb placed near the top of the suspension
spring of the pendulum.
Referring to the accompanying drawings
Fig. 1 illustrates the application of the rotating pendulum to a dotached lever
escapement.
:
Fig. 2 the application of the rotating pendulum to the horizontal escapement
And Fig. 3 the application of it to tlie duplex escapement. But in neither Fig. 2
or 3 is the pendulum shown, as I wish it to be understood that it may be either in'
precisely the same position in relation to the additional lover as in Fig. 1 or in any
other position by which it can be acted upon or act as hereinafter described.
(a) Fig. 1 is the additional lever attached to the roller staff (ƒ) which is propelled
by the detached lever escapement (b).
(a) Fig. 2 is the additional lever attached to the cylinder which is propelled by the..
horizontal escapement (h).
And (a) Fig. 3 is the additional lever attached to the staff of the duplex escape-
ment (d).
At each beat of the lever (a) in the case of the lover and horizontal escapements
Figs. 1 and 2 and at each alternate-beat in the case of the duplex escapement Fig. 3,
the forked ends (k) of the lever (a) come in contact with the tongue or projection (c)
on the rotating pendulum (p) and set it in motion.
Fig. 4 shews the top portion of the suspension spring (s) which is within a tube or
case (t) and loosely gripped by the sliding curb (r) so that raising or lowering the

page_text: curb (r) will lengthen or shorten the spring (s) and thus regulate the time of the
clock.
I do not confine myself to constructing the curb or altering its position upon the
suspension spring precisely as illustrated.
I do not confine myself to the precise details or positions of the parts as illustrated
in Figs. 1, 2, & 3 as they may be varied, for instance, the lever (a) may be reversed
with the forks (k) downwards and the pendulum hung so as to work below instead
of above.
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 :
1stly. Applying a rotating pendulum to a detached lever escapement, a horizontal
escapement or a duplex escapement substantially as herein set forth and specified.
2ndly. Regulating rotating pendulums by means of a curb substantially as herein
set forth and specified.
1000