Improvements in Machines for Cutting Lamp Chimneys.
Year: 1891

page_text: Date of Application, 29th May, 1891-Accepted, 15th Aug., 1891
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COMPLETE SPECIFICATION.
Improvements in Machines for Cutting Lamp Chimneys.
I, JEAN LOBET of Flémallegrande, in the Kingdom of Belgium, Mechanician,
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 :-
My invention relates to machines for cutting lamp chimneys.
The machines hitherto employed for this purpose leave much to be desired as
regards rapidity of work and finish.
For cutting a lamp chimney several operations have been necessary not only to
cut the chimney at its two ends in order to obtain the desired length, but also to
grind the cut chimney at its ends by means of suitable apparatus in order that
they may be level.
With my improved apparatus all these difficulties are obviated, for it cuts the
chimneys quickly, and the cuts made are so smooth and level that no subsequent
operations are needed for grinding and equalizing the divided portions.
In order that my invention may be more clearly understood I have described the
same in detail with reference to the accompanying drawings.
Figure 1 shows a general view of the machine in plan.
Figure 2 is a longitudinal elevation of Figure 1.
Figure 3 is an end elevation of the machine.
In these three figures the lamp chimneys are indicated by thick dotted lines in
order to avoid complicating the drawings.
Figure 4 illustrates in side and end view one of the blow-pipes which I use for
heating the parts of the chimneys to be cut.
Figure 5 shows in detail the part of the apparatus which supports one of the ends
of the chimney.
Figure 6 represents an arrangement for moving the cutters or cutting points
longitudinally other than that shown in Figures 1, 2 and 3.
Figure 7 represents the arrangement of the support for adjusting the cutters,
the left hand figure being a section through the axis of the figure on the right
hand side.
Figures 8 and 9 show an arrangement for cutting four chimneys at the same
time.
In all the figures similar letters designate corresponding parts.
The framework of the machine is made of four iron plates A B and A' B¹ firmly
connected with each other by two rods C which pass through lugs a provided on
the under sides of the said plates (Figure 3).
Upon each of these plates are secured the brackets G which support the shafts H
and J. Between the iron plates A and B on one hand and the plates A' and B' on
the other hand are provided the intermediate plates D, E, F, and D', E', F¹.
The plates D E and D' E' are only moved in exceptional cases and certain bulges
of the chimneys.
All the plates are provided with lugs through which the shafts C pass, but the
plates F and F' are further provided with a screw-threaded lug ƒ (Figure 3)
traversed by the screw I so as to enable these plates to be moved in one or the
other direction in the axis of the machine according to the length of the chimneys
to be cut.
This screw which also extends through a lug which has no screw thread and
which is provided on the under side of the plate B' is actuated by the hand
These blow-nines can be
wheel i.
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Haine K

page_text: displaced in the vertical direction by means of two nuts & placed upon their admission
pipe (Figure 4).
This pipe is divided into two parts by a small partition (shown in dotted lines),
one part serving for the passage of gas and the other for the passage of air.
The lower part of the pipe k is divided into two branches provided with two
cocks to which is attached an indiarubber: pipe (Figure 3) serving for feeding
the blow pipe. The gas and, air must not meet until they arrive in the cylindrical
case whence they pass through the,nozzle k, which must not have an orifice of
more, than half a millimetre in width by four centimetres in length.
Upon each blow pipe K (Figures 1, 2 and 5) and below the cylindrical case k³ is
fixed a small iron plate m provided. with a groove or slot m¹ (Figure 1) for enabling
the, bracket M to be at will caused to move towards or away from the blow pipe,
the said bracket which is also provided with a groove or slot permitting two other
small brackets m³ to recede.from or approach each other through the medium of the
spindle m having a left-handed thread on one of its halves, and a. right-handed
thread' on the other half. This spindle mis actuated by the milled wheel'm placed
at its middle part. "The two small brackets-m³ carry axes m² turning upon fine
points and designed to support small rollers m³ which must turn very freely and the
object of which is to support one of the extremities of the chimney to be cut.
These small rollers are surrounded with indiarubber rings.
The whole bracket above described, which is placed upon the plate. m enables
large and small chimneys to be optionally placed at the desired distance from the
nozzle of the blow-pipe.
Upon the plates D, D¹ are placed' blow, pipes K which do not differ from those
arranged upon the plates F and F, excepting that they are not provided with
plates. m, and their brackets M. Upon the plates DF and DF are likewise
provided brackets P rounded off at their upper portion for enabling the parts p',
which fit with their base upon the upper tenon p of the bracket P; to be inclined
to the right or left hand side so as to always obtain the exact direction of the cutter
or cutting point p³. The cutters or cutting points p³ are supported laterally in
guides p² of the part pl. A small sliding piece pt is fixed' by means of a screw p
upon the cutter (Figure 3). The screw serves to fix the sliding-piece p¹ at
precisely the same point as the cutter in order to have the exact length of the part
of this cutter which is necessary for cutting the chimney in accordance with its
size. The small sliding pieces which impart motion to the cutters are actuated
by eccentrics placed upon the shaft J, one on the right hand side of the machine
and the other on the,left hand side, so that the cutters will be moved intermittently.
Each of these eccentrics is provided on the shaft J, upon which are placed three
discs which take up the rods j' and keep them in their place.
.. The height of a pair of cutters p is adjusted with absolute exactitude by the
action of the screw. placed in the interior of the bracket P which possesses an
opening p for the passage of the milled wheel' po by which the screw p is actuated.
The small tenons have for their object to maintain the tenon-p vertical for the
purpose of preventing it from turning round. The shaft J is operated by the
pulley L which receives its movement in the manner hereinafter described.
Between the small sliding-pieces p and the guides for the cutters are placed,
so as to surround the cutters, small helical-springs having for their object to
move the sliding-pieces rapidly, to the rear when these, encountered by the rods of
the eccentrics, have moved the cutters abruptly to the front for cutting the chimneys
at the desired point. "For the proper operation of the apparatus care must be
exercised that the point of the cutter when stationary, that is to say, while the
eccentric makes its half revolution, shall be at a distance of about one centimetre
from. the chimney to be cut..
Accordingly the operations above described are effected as follows, the shaft J
receiving its movement from the pulley L actuates the eccentrics and the latter in
their turn encounter the small sliding pieces p'. The shock caused by one of the
rods or transverse pieces-J' of the eccentrics, which are connected with each other

page_text: by the parts J striking against the sliding pieces pt throws the cutters forward for
cutting the chimney, and the helical springs p', as soon as the rods of the eccentrics
are passed, move the cutters to the rear again.
For equalizing the work the eccentrics are placed so as not to actuate the two
cutters on the right hand side and the two cutters on the left hand side at the
same time.
The rollers n, which receive their movement in the manner hereinafter described,
actuate small shafts n supported at the other extremity by the brackets N'. These
rollers can be fixed at a given place through the medium of a pressing. screw so
as to adapt them to the chimneys to be cut, and they are designed to impart a:
rotary movement to the chimneys. They are surrounded by india-rubber rings.
To the chimney placed upon these rollers is imparted a more or less rapid rotary
movement according to the velocity given to the apparatus, and it causes the above.
named small rollers m³ provided upon the brackets to turn by themselves. The
brackets M which carry the rollers m³ being mounted so as to enable the chimney
to be inclined in one or the other direction, the chimney can be moved to the front
or to the rear, and will bear with its lower part. against the screw g' which also.
serves for regulating the length of the part to be cut off. These screws y¹ are
supported by parts which are forked and held in their place, through the medium
of screws, on the brackets G arranged upon the plates A. A.
9
The brackets N and N carrying the small shafts n have their lower parts.
provided with teeth so as to form racks, these parts being guided in small cases n³
having openings which leave a portion of the toothed part uncovered. These.
cases n² are fixed below the plates A, E, and A' E'. The brackets N N' are
designed to be displaced in a vertical direction in accordance with the thickness of
the chimneys to be cut, because, as the cutters or cutting points cannot be displaced
in the vertical direction relatively to the eccentrics they would be too low for the
thick chimneys and too high for the thin chimneys.
The brackets N and N are actuated by the shaft O through the medium.of the
wheel o upon which bears a pawl o' placed upon one of the rods C and which serves
to maintain the rollers at a suitable height. This shaft.O is held in its place by
lugs provided on the underside of the plates A, E, B, and A' E¹ B'.
In these lugs
are fixed upon the shaft O and opposite the toothed parts of the brackets N.and N¹,
the two toothed sectors o² (Figure 3).
By the action of the wheel o movement is thus imparted to the sectors o³.which:
actuate in their turn the parts forming racks of the brackets N N', which enables
the latter to be raised or lowered according to requirements.
Figure 6 shows another arrangement for moving the cutters. Instead of
employing helical springs p (Figure 3) for moving the cutters to the rear again.
after they have been thrown forward by the action of the rod of the eccentric
upon the above named sliding piece, I make use of a flat steel spring p¹ of the
form shown in the drawing, which is held in its position at its upper part by la
screw extending through the bow-shaped pieces pa fixed upon the guides p². The
lower parts of the spring p surround the sliding piece which they accompany
when it makes its forward movement, and which they move to the rear. together
with the cutter or cutting point på as soon as the rod j of the eccentric is passed.
(Figure 6).
12
"
The machine is operated in the following manner :-Movement is imparted by
any motive power through the medium of the pulley placed upon the shaft H.:
This pulley is made of two parts, one receiving the belt, whilst the other receives
a small cord or band for transmitting the movement to the double-grooved pulley /³,
which in its turn transmits it to the pulley h, these last-mentioned two pulleys
actuating the small shafts n which support one of the extremities of the chimney
and move the latter round in a rotary movement which it communicates to small,
rollers m³ that support it at the other extremity.
The above described movement takes place at the right.hand side of the machine.
The same movement is effected at the left hand side, this.movement being :obtained.
$

page_text: from the grooved pulley h² placed at the extremity on the driving shaft, H. The
whole movement must be such.that the shafts n' shall make, five revolutions while
the shaft H makes only one.
One of the stepped pulleys' fixed upon the shaft II transmits the movement of
the latter by a belt to the shaft L carrying the eccentrics, through the medium of
the pulley L. By reason of this arrangement of the pulleys h¹ and L the shaft Ja
can be driven at different velocities, which shaft must make only, one revolution for
five, revolutions of the shaft H. This device for changing the velocity. can be
replaced by gear. wheels arranged: upon the right hand extremities of the shafts. H.
and J..
It may be mentioned that with my improved machine at least 6000-chimneys can.
be cut per day, the output varying of course according to the size of the chimneys,
moreover my apparatus. cuts chimneys level, and, smooth so as to dispense with the
grinding operation.
Figures 8 and 9 show the arrangement which I use for. doubling the outputs of
my machine which in this. case: is arranged for cutting four chimneys at, the same.
time: Intits details this arrangement is similar. to that which serves for cutting two
chimneys. In fact it comprises two apparatus of the kind above described,. which
are placed side by side and are both operated by a single transmitting gear provided
in the middle. This arrangement is clearly shown in Figures 8. and 9,, which
represent an upper view and a side view of the machine.
It will. be understood that I do not limit. myself to the special, arrangements
hereinbefore set forth, as various: modifications in the details of my apparatus, can
be made without departing from the principle of my invention..
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 :-
First. In: machines for cutting- lamp chimneys the arrangement. of the iron
plates A Band:A B' rigidly connected with each other, by the shafts C for forming
the frame of the machine; as hereinbefore described and shown in the accompanying
drawings:.
Second. In machines for cutting lamp chimneys, in, combination, with the
plates A, B and A' B' and the shafts C, the brackets G carrying the shafts, H
and:.;. as herein before described and shown in the accompanying drawings..
Third: The arrangement of the flat plates D E F and D E F movably placed.
on the shafts C, the plates: F and F' being adapted to be displaced in the direction
of the axis of the machine through the agency of the rack I actuated by the hand
wheeli, as hereinbefore described, and shown in the accompanying drawings.
Fourth. The arrangement of the blow-pipes and K' respectively placed upon
the plates EF and D-D'; and having for their object to heat the chimneys. to, be
cut at the desired. points, as herein before described and shown in the accompanying
drawings..
Fifth. The employment and arrangements of the brackets M (Figure 5) for
holding one of the extremities of the chimneys, as hereinbefore described and shown
in the accompanying drawings.
Sixth. The employment and arrangement of the brackets P for supporting the
cutters p and the device for actuating the latter, as herein before described and
shown in the accompanying drawings.
Seventh. The employment and arrangement of the eccentrics J actuating the
cutters p³, as.hereinbefore described and shown in the accompanying drawings.
Eighth. The employment and arrangement of the brackets N and N' for
imparting through the medium of the pulleys na rotary movement to the chimneys,
which transmit movement to the pulleys ms, as hereinbefore described and shown in
the accompanying drawings.
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Ninth. In the brackets M the arrangement: of the spindle. m having, a right
handed and left handed screw-thread and enabling the rollers m³ to be moved.

page_text: towards or away from each other, as hereinbefore described and shown in the
accompanying drawings.
Tenth. The combination of the toothed sectors o² placed upon the shaft O which
is actuated by the wheel o held in its place by the pawl o' with the lower grooved
parts of the brackets N and N' for raising or lowering the latter, as hereinbefore
described and shown in the accompanying drawings.
Eleventh. The arrangement shown in Figures 8 and 9 for enabling four chimneys.
to be cut at the same time, as herein before described and shown in the accompanying
drawings.
Twelfth. The machine hereinbefore described and shown in the accompanying
drawings in its general arrangement and in its details.
Dated this 29th day of May 1891.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, Agents for the Applicant.