Improvements in Time Pieces of All Sorts.
Year: 1891

page_text: Date of Application, 20th Jan., 1891-Accepted, 10th Oct.,
1891
Improvements in Time Pieces of All Sorts.
JOHN MCCONNELL Moorfields Ballymena County Antrim Ireland Farmer
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:—
This invention refers to an improved escapement action for all kinds of time-
pieces, and I will now proceed to describe it with reference to the accompanying
drawings.
On the arbor b, of the balance wheel m, of the escapement, I fix the eccentric
roller u, or if preferred a roller which has a portion of its circumference cut off, so
as to form a plane or flatside on one portion of its circumference.
This roller a, engages with a balanced lever g, which carries a recoil spring d,
attached thereto by means of the stud j..
The lever
د!
e,
is pivotted at and carries a balance weight f, and a detent pin c.
The function of the spring d, is to assist in unlocking the detent pin c, from the
teeth =, of the escapement wheel h. This it does by receiving a thrust from a small
roller, fixed on the arbor b, at each vibration of the balance wheel, which thrust it
communicates to the further end of the lever g, through the stud j, thereby tilting
the lever and disengaging the pin c, from the tooth of the escapement wheel h,
whilst the roller a, presents its longer side to the lever.
On the arbor b, I also fix a quadrant shaped eccentric, which at each vibration
of a, presents its convex surface between two of the teeth of the escapement wheel
in such a way as to make the alternate stop or check, arising from the rebound of
the spring d.
Fig. 1 shews the position of the roller a, while one of the teeth z, is locked by
the pin c.
It will be seen that the lever g, is now held at its furthest distance from the
arbor b, namely the length of the longer radius of the roller a, and the spring d,
is held in position by the arm q, while it receives the impact of the roller l.
Fig. 2 shews the escapement wheel unlocked from the pin c, while the roller
has its short side, resting on the lever g, so that the lever can approach nearer to
the arbor, whereby as shewn the detent pin c, is disengaged from the tooth z.
The eccentric a, now forms the alternate stop, as it comes into contact with the
teeth of the escapement wheel, so that vibration is communicated to the arbor b, and
the balance wheel m.
Fig. 3 shews an end view of the arrangement and indicates the relative positions
of the various parts from that point of view.
Motion is communicated to the escapement wheel h, from the main spring, through
the usual train of toothed wheels.
A counterspring can be employed if desired to tilt the lever g, instead of the
balance weight f
The detent pin c, may if preferred be screwed on to an arm of the lever to allow
of more accurate adjustment.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is
The roller escapement action comprising the combination of the roller
a,
arbor b,

page_text: detent pin c, spring d, lever g, eccentric r, small roller 1, and arm q, as herein
described and set forth.
Dated this 20th day of January 1891
S. S. BROMHEAD,
97, Newgate Street, London, Agent for Applicant.