Improvements in the Mode of or Means for Suspending the Pendulums of Clocks.
Year: 1888

page_text: Date of Application, 13th 'Sept., 1888
Complete Specification Left, 12th June, 1889-Accepted, 13th July, 1889
PROVISIONAL SPECIFICATION.
Improvements in the Mode of or Means for Suspending the
Pendulums of Clocks.
A communication to me from abroad by ARTHUR DZONDI, of Dresden, Saxony,
German Empire, Architect.
I, JOHN CLAYTON MEWBURN of 169 Fleet Street, in the City of London, Fellow
of the Institute of Patent Agents, do hereby declare the nature of this invention to
be as follows:-
It is an essential point in clocks, to construct the, mechanical parts of clockwork in
such a manner, that they shall not only work with the least possible friction, but so
that bearings, causing friction, shall be avoided as much as possible, in order that
alterations in the resistance of such frictional parts, may be reduced as far as possible
for the benefit of the regular working of the clock.
The defects mentioned. will mostly occur in the mode of suspending the pendulum.
Such defects may be counterbalanced by increasing the weight, but the irregularities
which arise from the above mentioned defects in the bearings are not thereby
avoided.
Now in order to effect the suspension of the pendulum of a clock so as to cause
the least possible friction, but at the same time allow of an exact adjustment of the
hooking and of the stroke or turn of the pendulum, arrange the same in the
following improved manner: In the upper part of the clockwork I arrange a carrier
for carrying two swing springs (or spring swings) which springs are. connected
together by an anchor spindle. At one end of the said anchor spindle is a piece
provided with a carrying pin to which the pendulum is suspended or hooked by
means of an adjusting lever hereinafter described carrying the suspension hook.
The spring carrier may be adjusted in height by means of a screw, so as to be
able to exactly regulate the taking of the pallet into the balance or escapement
wheel. Furthermore a guiding pin and set screw are so arranged, that no sideway
shifting or displacement of the spring carrier may take place. The hook of the
pendulum rod is not fixed to the latter, but to the adjusting mechanism, which is of
peculiar construction; it consists of a double arm lever, which may be turned or
moved on a fulcrum or pin, situated on the stem of the pendulum. The adjustment
of the said double arm lever is effected by means of a screw fixed to the pendulum
stem, this screw carries a nut, the pin of which is in close vicinity to two other pins.
By turning the screw the nut is shifted, and by means of the two pins the double
arm lever is turned or the position of the suspension book is altered to the middle of
the pendulum stem, according to whether the pendulum's stroke has to be altered to
the one or to the other side.
Dated this 12th day of Cambo
1000
COMPLETE SPECIFICATION.
Improvements in the Mode of or Means for Suspending the
Pendulums of Clocks.
A communication from abroad by ARTHUR DZONDI, of Dresden, Saxony, German
Empire,, Architect.
I, JOHN. CLAYTON MEWBURN, formerly of 169 Fleet Street in the City of London,
but now of 55 and 56 Chancery Lane in the County of Middlesex, Fellow of the
Institute of Patent Agents, do hereby declare the nature of this invention and in
[Price G

page_text: what manner the same is to be performed, to be particularly described and ascertained
in and by the following statement:-
It is an essential point in clocks to construct the mechanical parts of the clockwork
in such a manner that they shall not only work with the least possible friction, but
so that bearings causing friction shall be avoided as much as possible in order that
alterations in the resistance of such frictional parts may be reduced as far as possible
for the benefit of the regular, working of the clock:
The defects mentioned will mostly occur in the mode of suspending the pendulum.
Such defects may be counterbalanced by increasing the weight, but the irregularities
which arise from the above, mentioned defects in the bearings are not thereby avoided.
Now in order to effect the.suspension of. the pendulum, of a clock so as to cause
the least possible friction, but at the same time allow of an exact adjustment of the
hooking or suspension and of the stroke or beat of the pendulum, I arrange the same
in the following improved manner, which will be understood on reference to the
annexed drawings.
.
In the upper part of the clockwork I arrange a carrier A. (see Figures 1 to 7) for
carrying the two swing springs D, which springs are connected together by the anchor
spindle B. At one end of the said anchor spindle is a piece b provided with a carrying
pin a to which the pendulum is suspended or hooked by means of an adjusting lever
hereinafter described carrying the suspension hook. The spring carrier A can be
adjusted in height by means of the screw d, so as to be able to exactly regulate the.
taking of the anchor E into the balance or escapement wheel.. Furthermore a
guide pine and set screws fare so arranged that no sideway shifting or displacement
of the spring carrier A can take place. The hook m of the pendulum rod is not
fixed to the latter, but to the adjusting mechanism which is of peculiar construction;
it consists of a lever F which can be turned or moved on the fulcrum or pin g
.situated on the rod of the pendulum. The adjustment of the lever F is effected by
means of a screw fixed to the pendulum rod; this screw carries a nut the pin k
of which is in close vicinity to two other pins 11. By turning the screw the nut i is
shifted and by means of the pins the lever Fis turned or the position of the
suspension hook m is altered to the middle of the pendulum rod according to whether
the stroke of the pendulum has to be altered to the one or to the other side.
Figures 8 and 9 show a modification in which the lever F to which the suspending
hook m is attached carries a small plate n in which is a circular recess. On the upper
part of the pendulum rod a small plate o is fixed which fits exactly into the recess of
the plate n.
The two plates and o thus fitted together are connected by a screw-
pin g', the screw thread engaging into a thread in the pendulum rod. This connection
allows of any desired alteration or adjustment of the stroke of the pendulum to the one
. side or to the other.
The mode of suspending clock pendulums as above described and illustrated in the
Figures 1 to 9 not only reduces the friction to the minimum but also causes or
produces an always equal resistance and requires much less weight for driving a
clock.
Having now particularly described and ascertained the nature of the said inven-
tion as communicated to me and in what manner the same is to be performed, I
declare that what I claim in respect of the suspension of clock pendulums is :-
1. The suspension springs D D connected by the anchor spindle B and fixed to an
adjustable carrier A, in combination with an adjusting lever I carrying the suspension
hook m which is hooked to the anchor spindle, substantially as and for the purpose
set forth. .
2. The arrangements of parts for suspending clock pendulums substantially as herein-
before described and represented in the accompanying drawings.
Dated this 11th day of June 1889.
J. C. MEWBURN.