Year: 1894

page_text: Date of Application, 22nd Dec., 1894
Complete Specification Left. 10th July, 1895-Accepted, 31st Aug.,
189-
I HENRY JOHN WAGG Electrical Engineer of 40 Brynuston Square in the
County of London, do hereby declare the nature of this invention to be as
follows
-
On a spindle mounted in a metal fiame are fixed, a toothed wheel minus a few
consecutive teeth, and a hellow drum open at one end, in which is a spring, one
end of which is fastened to a pin, fixed on the frame, and the other end, either to
the shaft, or to the inner surface of the drum, a broad slot is made in the ontside
of the drum, parallel to its axis, which if the drum is made of an insulating
material, is filled with metal, and if of metal is filled with an insulating substance.
The toothed wheel gears into a pinion mounted on another spindle, on which is
also fixed a ratchet wheel beside which is a loose toothed wheel on the side of
which is fixed a paul by means of which the toothed wheel revolves when the
ratchet wheel moves in one direction, and remains stationary when the ratchet
wheel moves in the other direction, the loose toothed wheel by means of more
pinions and toothed wheels gears with a lan o escapement, a brush presses against
the dium, one terminal of the switch is connected to the brush and the other,
either to the framework of the machine, or to another brush fixed by the side but
insulated from the first, the spindle on which the dumm 15 mounted is continued
to the outside of the frame, and on it is fixed a pointer, over a dial divided into
degrees, each degree representing a phase of tune, depending on the gearing of
the aument, the end of the spindle is squared off for a box hey to fit ou
On
On moving the clock hey say through half a revolution to the right, the drum,
toothed wheel, and pointer move the saine distance, at the same moment slightly
winding up the spring and causing the shaft on which the ratchet wheel is, to
evolve m the contrary direction to that in which it would catch in the paul.
eleasing the key the drum commences to revolve in the opposite direction, and its
speed is regulated by the toothed wheel, gearing, aud fan o escapement; as the
pointer is reaching zero, the toothless space on the toothed wheel reaches the
pinion, throwing out of gear the regulating tram the dium revolving through a
short space very quickly either breaking or making contact as desired, and is
stopped by a stop on the drum coming in contact with a spring stop or buffer
counected to the frame, the time is regulated by the distance through which you
turn the pointer the instrument can be made to go either for long or short periods.
Dated this the 19th day of December 1894.
I, HENRY JOHN WAGG, Electrical Engineer of 40 Bryanston Square, in the
County of London, do hereby declare the nature of this invention and in what
0manner the same is to be pei forined to be particularly described and ascert uned
in and by the following statement
The object of this invention is to provide au electric switch capable of being

page_text: སད་་བཅས་་
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or completed after the expiration of any pre-determined time.
The invention will be best understood by reference to the accompanying
drawings in which
Figure 1 is a view of the device with the front of the case and the front
housing-plate removed, the device being here represented as when the circuit is
completed and arranged to be broken after a certain time.
Figue 2 is a view corresponding to a portion of Figure 1 (with part of the
front housing-plate represented) showing the device as when the circuit b
broken, and
Figure 3 is a vertical section on the line 3-3 of Figure 2 of the complete
device.
Like letters represent like parts throughout the drawings.
The operative parts of the device are all mounted in or between two housing
plates AA which are igidly secured together by conveniently four rods or
distance pieces A'. Between the plates A A is located a metal drum C keyed on
otherwise rigidly secured on a spindle D which has its bearings in the plates A A'
and the front end of which projects through and to the front of the plate A where
it is squared to admit of the engagement therewith of a key for winding-up the
SW1lch The dim may be open at one side (in the drawings it is shown open at
the front side) and contains a spial spring E one end of which is secured to a
stud A projecting backwards from the plate A and the other end to a hook or
projection D on the spindle D or to a suitable part of the dium C. The diuin C
is provided with a gap C which, if desued, may be filled with insulating material
or, as shown in the drawing, said gap may be left empty; or instead of a gap
completely dividing the annular wall of the dium this wall may be recessed and a
piece of insulating material secured in the recess the exterior surface of the
insulating material being even with and forming a continuation of that of the
drum.
Fixed to the druin C is a mutilated gear wheel C C adapted to gear with a
pinion T which, when rotated in one direction, rotates a sp wheel F through the
medium of a ratchet wheel G and spring-controlled pawl 'G' the former of which
is secured to the pinion or its spindle E' and the latter pivotted to the wheel F
(or the reverse of this last described arrangement may be provided), when the
pimon is rotated in the opposite direction the teeth of the ratchet wheel G ship
under the pawl G. By the gear wheels F H II', worm-wheel I and worm 11,
motion is tiansmitted from the wheel F to a fly J which controls the working of
the switch.
K is a stirrup secured conveniently to a bar A' supported by the plates A A or
to any other suitable fixed part of the frame and which is adapted to engage with
a stud or projection C on the drum C when the electic circuit is broken as
hereafter explained and as shown in Figures 2 and 3
Lisa bush adapted to bear on the periphery of the drum C and which is
recessed as at L' to allow the stud C to pass beyond it
This brush is supported
on a non-conducting blok M and is connected by a conductor L' with a terminal N
to which one of the main condus tois may be connected in any convement manner
This terminal is mounted on a non-conducting block N' secured to the plates A. A'
and supporting three other terminals N' N³ Ñ' of which N and N (Figure 3) are
connected together by a conductor N but insulated from all other parts of the
apparatus and N 15. connected to the apparatus as by a conductor N secured to
the plate A In Figure 1, only the teimmals N' N³ are seen and in Figure 3
these letters are used to indicate the screws by which said terminals N' N³ are
secured to the block N the letters N N' being similarly used to indicate the screws
by which the terminals, before referred to by those letters, but which are not
themselves shown in the drawings, are secured, to the plate N'.
The switch is placed in circuit by connecting the two terminals N' N' to the
source of electricity and the two terminals N N to the apparatus to be served by

page_text: the current oi vice tersa any convenient connections being employed for the
purpose.
To the drum C or wheel I secure an arm O adapted to strike against the lower
end of a rod P provided with a head or hammer P1, the rod P being supported in
a socket or guide P secured to the plate A' The hammer P is situated at the
outside of the case o hox Q, in which the switch is fitted, and adjacent to the
bell R which is secured to the case in any convenient manner.
An index or pointer S is fitted on the front end of the spindle to indicate on a
graduated dial S₁ the positions to which the drum must be tuned for maintaining
the completion of the circuit for any given time, for example each division of the
scale may represent a minute of time so that it may be understood that when on
starting the switch the pointer is tuned to say 60 the circuit will be maintained
complete for one hour and then broken. The dial is visible through an opening Q¹
in the case Q.
Normally, that is, when the switch is not wound up, the gap or insulated part C'
of the drum C is presented to the brush L and the mutilated part C3 of the
wheel CC to the pinion E so that the switch is inoperative and the encuit is
broken When the switch is being set the gap Cis moved away from the brush L
and the conducting surface of the druin C is moved into contact therewith (the
circuit being thereby completed) and the unmutilated part C' of the wheel C C*
is moved into gear with the pinion E, all as shown in Figure 1, the teeth of the
At this time
ratchet wheel G during this operation slipping beneath the pawl G'
the current from the source of electricity enters the device through say the
terminal N. and passes through the conductor N to the terminal N whence it
flows through the apparatus to be served by the current from which it returns to
the switch device by way of the terminal N. The curent then passes through
the conductor L to the brush L thence to the drum C and plate A' in electrical
connection with the drum and thence through conductor Ne and terminal N back
to the electrical source. The direction of flow of the current may be the leverse
of that above set forth.
As soon as the spindle D through the disengagement therefrom of the winding-
up key, is released by the operator, the spring T causes the drum C to rotate in
the duection indicated by the arrow in Figure 1, the motion then being controlled
by the fly J When the mutilated part of the wheel CC reaches the piuton E
the
Spong T having nothing to restrain its free unwinding moves the drum C
rapidly through part of a revolution until said dium is ariested by the stud (+
engaging with the sturup K, the gap then being presented to the brush as shown
Figmes 2 and 3, and the circuit thereby broken, the movement being so rapid as
to prevent or minimize sparking, the bell R at the same time being struck by the
hammer P to give an audible signal.
The before described device may be modified without departing from the essential
features of the invention for instance if desired the conducting and non-conducting
parts of the drum may be arranged in the reverse manner to that previously
described so that it may be adjusted for completing the circuit after the expiration
of a given time instead of as before explained breaking the encunt, and moreover
instead of the fly J 1 may use an escapement or other suitable controlling
nechamism.
Instead of the motor being a spring a weight or other agent may be used for
operating the switch
The before described device may be used for a number of different purposes
wherever it may be required to automatically make or break circuit at the
expiation of a pre-determined time, it being specially applicable for use in
connection with electric cooking apparatus. Although I have described the
Imoving part of the switch as in the form of a drum, other forms adapted to g.vo
the necessary rapid make or break movement when released by the motor
mechanism for example a straight bar, may be used,

page_text: Having now particularly described, and ascertained the nature of my said
invention and in what mauber the same is to be performed, 1 declare that what I
claim 18.-
1. The combination with an electric time switch of a rapid break device.
2. An electric switch apparatus in which the encunt is closed on completed by
the person using the instrument and broken automatically by the instrument
3. In an electric switch the combination with a drum operated by a spring or
motor and having an interrupted conducting surface of a mutilated gear wheel
substantially as and for the pui pose described.
4. In an electric switch the combination with a drum having an interrupted
conducting surface a spring or motor for rotating it and a fly or equivalent for
controlling its rotation of a mutilated gear wheel interposed in the gearing
connecting the drum with the controlling inechanism substantially as and for the
purpose described and illustrated in the accompanying drawings
5 In an electric switch the combination with a dium a motor mutilated aud
other gearing and controlling mechanism such as claimed in the last pieceding
claim of a stud and stup such as K substantially as described and illustrated
in the accompanying drawings.
6 In an electric switch the combination with a drum a motor mutilated and
other gearing and controlling mechanism such as claimed in Claim 4 of an audible
signal device substantially as described and illustrated in the accompanying
drawings.
7. An electric switch device in which the spring 18 wound in proportion to the
length of time during which the circuit is to remain completed or interrupted as
the case may be.
8. An electric switch in which the index is set by the act of winding the spring
of the instrument.
9. An electic switch in which the index moves with the winding of the spring
so that its position corresponds with the amount of such winding and indicates the
length of time during which the instrument will run.
10 The combination and arrangement of parts constituting the complete electric
switch substantially as described and illustrated in the accompanying drawings.
Dated this the Second day of July 1895.
HENRY JOHN WAGG.
Boult & Wade.
Agents for the Applicant.