Year: 1897

page_text: (A communication by JOHANN CHRISTIAN BAUER of 95" Königsstrasse, Fürth,
Bavaria in the Empire of Germany, Banker)
I, WILLIAM PHILLIPS THOMPSON F.C.S., M.I.M.E. of the Agency for Foreign Patent
Solicitors of 6 Lord Street, Liverpool and 6 Bank Street, Manchester both in the
County of Lancaster, 118 New Street Birmingham in the County of Warwick and
322 High Holborn in the County of Middlesex Civil Engineer, do hereby declare
the nature of this invention to be as follows:-
This invention has for its object an improvement in the rotary pendulum
escapement described in Patent No 6356%, in which the pallet for conveying the
movement of the scape wheel to the pendulum is moved in a circle against the
scape wheel and for this object oscillates in the plane of the scape wheel on an axis
of rotation parallel to the axis of the said scape wheel. The driving pallet is here
fixed on one end of a two armed lever mounted on the above mentioned axis of
rotation, said lever being also connected with the rotary pendulum, and the scape
wheel being in the ordinary forms of construction controlled by an anchor which
also oscillates in the plane of the former and for this object is arranged on a third
spindle parallel to the scape wheel spindle.
Now the present improvement has for its object to simplify the construction by
omitting the third spindle and enabling the anchor effecting the escapement to be
mounted on a common spindle with the lever carrying the driving pallet.
This object is attained by employing a so-called duplex wheel instead of flat scape
wheel carrying only one set of teeth. Said wheel consists of a disc with two sets of
teeth. The one set of teeth is bent upwards to form lateral or crown teeth so that
it forms a toothing above the lower row of teeth and parallel to the plane of the
latter. A pallet mounted on a lever, revoluble on a spindle, engages in this upper
toothing and in the ordinary way conveys the movement of the latter to the rotary
pendulum. The anchor on the other hand is also mounted on the same spindle and
acts with its lifting or stopping pallet as an escapement on the lower toothing of the
duplex scape wheel.
1000

page_text: (A communication by JOHANN CHRISTIAN BAUER of 95" Königsstrasse, Fürth, Bavaria,
in the Empire of Germany, Banker.)
I, WILLIAM PHILLIPS THOMPSON, F.C.S., M.I.M.E., of the Agency for Foreign
Patent Solicitors, 6, Lord Street, Liverpool and 6 Bank Street, Manchester, both
in the County of Lancaster, 118 New Street, Birmingham in the County of Warwick,
and 322 High Holborn in the County of Middlesex, Civil Engineer, 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 has for its object an improvement in the rotary pendulum
escapement described in Patent No. 6356%, in which the pallet for conveying the
movement of the escape wheel to the pendulum is moved in an arc of a circle by the
scape wheel and for this object oscillates in the plane of the scape wheel on an axis
of rotation parallel to the axis of the said scape wheel.
The driving pallet in the aforesaid patent is fixed on one end of a two arméd
lever mounted on the above mentioned axis of rotation, said lever being also
connected with the rotary pendulum, and the escape wheel being as in the ordinary
forms of construction controlled by an anchor which also oscillates in the plane of
the former and for this object is arranged on a third spindle parallel to the scape
wheel spindle.
Now the present improvement has for its object to simplify the construction by
omitting the third spindle and enabling the anchor which effects the escapement to
be mounted on a common spindle with the lever carrying the driving pallet.
The invention will be described with reference to the accompanying drawings, in
which :-
Figures 1 and 3 are front elevation and plan of the device with the pallet lever in
one extreme position ;
Figure 4 a plan with the pallet lever in the other extreme position.
Figures 2 and 5 side elevation and plan with the pallet lever in mid position ; and
Figure 6 is a plan of the pendulum or balance.
The aforesaid object of the invention is attained by employing for the escapement
wheel a so-called duplex wheel i.e. a wheel with two sets of teeth instead of a flat
scape wheel carrying only one set of teeth. Said wheel, as shown in the drawings,
consists of a disc a with two sets of teeth a¹ and a². The one set of teeth a¹ is bent
upwards to form lateral or crown teeth above the lower row of teeth and parallel to
the planes of the latter. A pallet is arranged on the end h¹ of the double armed
lever h h or the end h¹ of the lever may be directly formed as a pallet, as is shown
for instance in the drawing. The lever h h is revolubly mounted in the plane of the
scape wheel a on an arbor g parallel to the arbor d of the scape wheel, and has its
end h provided with a rod h² which engages in a forked arm h³ in such a way that
the lever hand the pendulum or balance P oscillate together so that the movement
of the scape wheel is conveyed to the pendulum or balance P by means of the
lever h h oscillating on the arbor g, the pallet or end h¹ of the lever being engaged
by the teeth a'.
The escapement. takes place by means of an anchor b mounted on the arbor g which
anchor engages the teeth a² of the "duplex" wheel-a aforesaid.
The mode of action is as follows
-
In consequence of the pendulum oscillations conveyed to the double armed
lever h h there is produced an engagement between the pallet or end h¹ of the lever
and the teeth a¹, and at the same time there is attained an action of the anchor b on

page_text: the teeth a². At each oscillation of the pendulum and thereby of the lever h h¹
from the position shown in Figure 4 to the one shown in Figure 3 one scape wheel
tooth a² is released by the anchor b whilst at the same time in the middle position of
the lever shown in Figure 5, the pallet h¹ comes in front of a tooth a¹ of the other
set of teeth, and receives from this an impulse which is conveyed or transformed to
the rotary pendulum.
This process is repeated at each double oscillation of the pendulum.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, as communicated to me by
my foreign correspondent, I declare that what I claim is :-
A rotary pendulum escapement of the kind in which the driving pallet oscillates on
a spindle (9) parallel to the axis of rotation of the scape wheel, characterised by the
scape wheel being formed as a duplex wheel with one set of teeth (a¹) for the driving
pallet to engage and another set of teeth (a2) for the anchor or the like device for
effecting the escapement to engage, substantially as herein before described and
shown.
Dated this 07th
1007