Year: 1887

page_text: Date of Application, 1st Apr., 1887
Complete Left, 2nd Jan., 1888
Complete Accepted, 3rd Feb., 1888
WILLIAM FRASER, Engineer, 49, Oxford Road, Finsbury Park, London N., do
hereby declare the nature of this invention to be as follows
The alarm can be made to go off at any time whatever at will. By screwing the
nut at the top of the pusher shaft which shortens the distance the cylinder has to
travel, by pushing down the pusher shaft as far as the top of the bell, & setting the
nut over the figures marked on the shaft, (which requires only to be done once if the
alarm is to be always kept at the same time) then by the action of the spring at
the bottom of the outside cylinder. The inside cylinder which is filled with any kind
of liquid (oil, prefferable) the piston being a fixture with a small valve in the block,
which allows the liquid to pass through it when the cylinder is sent down & which
closes immediately it commences to rise by the action of the spring below, thus the
cylinder can be pushed down with a sharp stroke & by adjusting the valve the
upward movement can be retarded to whatever is required. I will now describe
more fully the principle on which it is wrought.
B. is a cylinder with a circular plate marked C. which forms part of the base. D. is
the base with a hole through the centre a little larger in dia' than the internal of B.
B. is a cover for the top of cylinder B which is attached by screws to cylinder B.
Attached to cover E is an upright tube or shaft F. to the top end of which bell G. is
attached to pusher shaft H. the top end of which is screwed internally.
Button I. having a screwed tail to fit & off sufficient length to give the necessary
shift required to alter or vary the time for the alarm the stem of Button B. is covered
with a tube or shield J. the inside dia' of which is a little larger than the outside dia'
of shaft H. same being figured at the top or button end for the purpose of timing the
alarm, shaft H. has a small square shifting pin with a washer on the inside end of it,
the outside end of it is turned square to the washer end, and is marked A. The
button end of shaft H. is slotted on both sides with a washer K. on the end of it.
Pin I. holds the slotted end of shaft H. & when the shaft is pressed down always
remains in its position. i.e. the end of shaft H being slotted half-way up on both
sides can be sent down the length of the slote, the pin L passing crosswise through

page_text: the shaft H. on both sides cylinder M. is an inside cylinder with piston N. attached
to pin L. which holds it perinanent. M. is fitted with a cover O. piston N. passing
through it cover O. is kept about 3" or thereby below thet op of cylinder M. to prevent
loss of any liquid that may ever escape from or through cover O. Piston block P. is
a piece of tube with a cover on bottom end of it with small valve Q. R. is a tapered
sparrel spring & can be compressed into about 4" or thereby. S. is a spring with hammer T.
on the end of it & fixed to bracket U. Cylinder M. is filled with a liquid (oil being
preferrable) the piston rod being a fixture button I. & shield J. the stem of the former
being screwed to fit the inside top end of shaft H. same being figured, by the
button I. being revolved it causes shield J. to cover or uncover at will the figures
on H. which indicates the time the alarm will be given i.e. the screwed button
lengthens or shortens the shaft H. which acts in like manner on M. when H. is sent
down by pressing I. pin A. passes down the back side of spring S. washer K being
attached to H. sends down the cylinder M. to the required listance the liquid in the
cylinder passes through the valve which allows it free access with the downward
movement but closes the moment the upward movement takes place. Spring R.
being compressed by M. is fixed by a plate to bottom side of D. the liquid is now
caught between the bottom side of piston block P. & the bottom end of cylinder M.
& by regulating the valve Q. will thereby allow any required quantity of liquid to
pass in a given time as the cylinder M. assends pin A. passes up the outside of
spring S. the pin having the necessary shift to pass the bracket U. draws spring S.
close to shaft F. & when it travels to the top of the spring S. it slips over the top of
same the hammer T. strikes bell G. the moment pin A. slips it.

page_text: I, WILLIAM FRASER, of 49 Oxford Road, Finsbury Park, London, N., 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 :-
The time for the boiling of eggs, is usually determined, by what are commonly
called egg boilers, consisting of two glass chambers, sub-divided from each other, by
a neck or contracted passage, of a determinate bore, and through which, sand from
one vessel to the other, passes.
An instrument of this kind, will only determine approximately, fixed periods of
time.
By my invention, the apparatus can be set to varying chronometric periods of time,
and at the expiration of such times, an alarm is raised, by the ringing of a bell.
The apparatus consists of a movable cylinder, having within it, a fixed piston, and
piston rod, which latter is supported by a tubular carrier or frame, whose base is.
hollowed out, and wherein a spiral or other spring, is enclosed, and with its upper.
free end, impinging or pressing upon the underside of the movable cylinder, provided
at its upper end with a pusher stem, which works within an outer tube upon which
the bell is supported.
The pusher stem has an adjustable cap at its upper end, which on being raised or
lowered, to graduated markings on the stem, the apparatus is timed accordingly.
The clapper of the bell, which is carried by an upright, standing from the cap of
the tubular carrying frame, is worked by a sliding bolt, passing transversely through
a hole, in the movable pusher stem, as aforesaid.
The outer, and presented end of the bolt, has a teit upon its side, which engages on
the offside of the clapper arm, and as the pusher rod moves upwardly, it contracts,
or draws in the clapper, until the teit arrives at the open top, when the clapper is
liberated, and strikes. the inside of the bell, with considerable force, thereby indicating
certain chronometric periods of time.
The piston has a valve upon its underside, wherethrough oil contained within the
cylinder, slowly passes to the lower side.
Figure 1 represents partly in vertical section, and partly in elevation, an adjustable
alarm egg timer, constructed according to my invention. The said egg timer or
apparatus, is shown in its normal condition, or before it is set in action.
Figure 2 represents a like view as figure 1, but with the apparatus, in action, the
motive power of which, is a ribband spiral spring, situated under the bottom of a
movable cylinder, containing oil, or other mobile or flowing substance.
Figure 3 represents the upper part of the said egg timer, with the clapper of the
bell, in a position which it assumes just before it is liberated by the passing of the
holding device in the form of a bolt, over its top edge.
The striking of the bell indicates that a certain chronometric period of time, has
elapsed, since the apparatus was set agoing.
Figure 4 represents the pusher stem of the apparatus, and it also shows the
adjustable cap at its summit; and by means of which, the apparatus is timed or

page_text: regulated, by making the cylinder move through a determinate distance, in a certain
period of time.
Figure 5 represents a side view of the upper part of the apparatus, showing the
outer tube, upon the summit of which, the bell is supported, and the crank stem upon
which the arm of the clapper is secured.
Figure 6 shows a sectional view of figure 5, but turned round, into a position at
right angles to that of figure 5.
Figure 7 represents the fixed piston, and figure 8 the top of the piston rod, showing
the end which is supported, and hung upon the cap, carried by the tubular
carrying framing.
Figure 9 is a plan of the underside of the piston, showing the position of the valve,
with respect to the opening, as it is seen that the valve consists simply, of a piece of
sheet metal, nearly covering the opening made transversely through the piston.
Figure 10 is an end view of the bolt, for working the bell clapper, thus showing
the position of the teit, which engages with the spring arm.
The same letters of reference indicate corresponding parts in the several figures of
the drawing.
a is a movable cylinder, closed at both top and bottom, and working within an
outer tubular casing b, closed at its upper end, by a covering 62, and connected at its
lower open end, by flanges, to a base or support c, which has sunken within its middle,
a well or cavity c, wherein a spiral ribband spring, or other spring d is disposed,
with its lower edge resting upon a bottom c³, and with its upper free end impressing
itself upon the underside of the movable cylinder a.
The movable piston has a pusher rod e, extending upwards from its top end, and
passing vertically through a fixed tubular upright, upon the summit of which, the
bell is mounted.
The pusher e, which works the cylinder a, within its outer casing, has an adjustable,
or time cap h, by the raising and lowering of which, the working of the apparatus is
regulated; that is, by raising or lowering the time cap to the graduated scale e, the
distance of travel of the pusher rod and cylinder is regulated; and which said
adjustment is effected by the screw, in the inside of the cap h, screwing into the
inside of the upper part of the pusher rod e, by which means, the shoulder ³ is made
to approach or recede from the shoulder f, at the outside crown of the bell.
Depending within the movable cylinder a as aforesaid, is a fixed piston rod i,
having at its lower end, a piston j, whose underside is provided with a valve 11, which
nearly closes the passage through the said piston.
This piston rod and its piston, is supported, and hung upon the top covering b²,
by the end at the upper end of the said piston rod.
The lower end of the piston rod, is slotted at e³, wherein the cross bar 13, of the
piston rod, passes.
The pusher rod carries a sliding bolt k, with a teit ², at its acting end, which is
made to operate the clapper. This spring bolt is carried by the pusher rod, and
works within a slot 3, cut within the tubular upright, wherein the stem e, works.
I is the bell clapper, and is its spring arm, and which latter is open at top and
bottom, or connected to the clapper at its upper end, by a side web 3, and at its
lower end also by a side web or connection 1, at its lower end, to an upright m,
cranked at its upper part, and supported upon the covering be of the outer casing b.
The teit, of the sliding bolt k, so acts upon the arm of the clapper, that the
downward movement of the pusher rod, causes the teit on the bolt, to travel upon
the inside of the arm, but on the upward movement of the pusher rod, the teit
travels upon the outer side of the clapper arm, thereby compressing the clapper
inwards, as in figure 3, until the said teit passes the connection 1, so as to
liberate the clapper, which then strikes the bell with a force corresponding to the.
compression of the spring arm.
The apparatus works as follows.
If the apparatus is required to be timed, say to three and a half minutes, then the
time cap h, is adjusted to the scale indicative of the aforesaid; this done, the pusher

page_text: rod
is pushed down, causing the movable cylinder a, to be pressed into the position
as in figure 1, with the spring d compressed upon its underside.
The downward movement of the pusher rod, which is made to work upon the T
end 2, and within the tubular upright, lowers the cylinder upon the piston, which
thereby causes the oil on the top side of the said piston, to flow to the lower side,
through the opening j³.
The downward movement of the bolt k, with the pusher rod e, brings its teit k*,
below the bottom end of the spring arm 12 of the clapper 1, and with the shoulder h³
of the time cap h, abuting upon the shoulder, at the crown of the bell g.
On the pusher rod or stem e, being liberated, the valve n, in the piston block,
closes, and the oil on the underside of the piston, slowly insinuates itself through the
space left between the valve, and the hole 2, to the upper side of the piston; and as
the cylinder rises, consequent upon the displacement of the oil from the lower part to
the upper part, through the influence or pressure of the spring d, the pusher rod
slowly rises, and carries with it, the bolt k, and with the hook like teit 2, acting upon
the front side of the arm 12, and so compressing the said arm and clapper into the
position as represented in figure 3, but on the bolt rising above the webbed con-
nection 13, then the clapper is liberated, and strikes the bell as in figure 1, thereby
indicating that three and a half minutes had expired, (or whatever it had been set to
give the alarm at) since the apparatus was set agoing.
I wish it to be observed, that the same result can be obtained, by making the
cylinder a fixture, and the piston rod movable.
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,-
First. An adjustable alarm egg timer. The means herein described, of deter-
mining chronometric units of time, and sounding an alarm, substantially as, and for
the purpose as described and set forth.
Secondly. In combination with a bell and stand, or supporting framing, of chrono-
metric time apparatus, and bell clapper actuating mechanism, as herein described
and set forthı.
Thirdly. In combination with an egg timer, of a movable closed ended cylinder,
filled with oil or other suitable liquid, and working upon a stationary piston with
valve and opening, supported by a fixed piston rod, suspended from the fixed framing
of the apparatus, as set forth.
Fourthly. In combination with an oil, or liquid egg timer, of a spring d, movable
cylinder a, piston and piston rod i, j, with valve, and their connections, as set forth.
Fifthly. Operating the clappers of the alarm apparatus, of egg timers, by a sliding
bolt k, k, worked in connection with a pusher rod e, as set forth.
Sixthly Adjusting the time of the working of egg timers, by a screw cap 4, in
connection with a pusher rod e, connected with a movable cylinder a, as set forth.
Seventhly. In combination with an adjustable time cap h, and pusher rode of
time graduations e², as set forth.
Lastly. The general construction, arrangement and combination of an adjustable
alarm egg timer, as herein described and set forth; and which said apparatus, or the
parts thereof, operate and work, substantially as described and illustrated.
Doted that 1007
WILLIAM FRASER.
By Henry Skerrett,
Agent for Applicant.