Improved Means applicable to Anemometers and other Instruments for Recording their Speed of Rotation.
Year: 1899

page_text: DIPUINICA TUN.
Improved Means applicable to Anemometers and other Instruments
for Recording their Speed of Rotation.
I, WILLIAM HAROLD TINGEY, B.A., of Rede Court, Rochester, in the County of
Kent, Cement Manufacturer, do bereby declare the nature of this invention to be
as follows:-
This invention relates to improved means applicable for use in the production
of a continuous record of the movements of revolving instruments, appliances or
bodies, the rotative speed of which varies from time to time.
Assuming my invention to be applied, by way of example, in recording the
movements of an anemometer of the Robinson cup type, the spindle pertaining to
the wheel which operates the indicating mechanism is provided with a loose sleeve
or bush formed of ebonite or other suitable non-conducting material, and embraced
for a portion of its circumference by a platinum or other contact plate. From this
sleeve projects an arm or lever whereof the outer end is weighted and engages with
a pin or projection carried by the before mentioned wheel. Upon the rotation of
this latter wheel-owing to the revolution of the cup-spindle-the pin or projection
raises the arm or lever and rotates the sleeve about its spindle. The arm, upon
arriving at the vertical position, falls by gravity and, owing to the sleeve being.
mounted freely on its spindle, the arm and sleeve swing round; contact between
the platinum plate and a pair of brushes being thereupon established and immediately
afterwards broken. The effect of this contact is to operate an electro-magnet whereof
the armature is connected with a pawl which, when the said armature is attracted;
imparts a longitudinal movement to a rack whereon the recording point or pencil
is mounted opposite a paper-clothed drum. A detent prevents the backward travel
of the rack. The paper strip is operated by clockwork the latter being furnished
with contacts which, at every minute or other predetermined period of time, operate
a relay. The armature of the relay operates in turn an electro-magnet whereof
the armature is connected with and draws down the recording point upon the
paper. Upon the contacts in the clock being broken, the armature of the relay is
released and another electro-magnet is brought into operation for the purpose of
releasing the pawl and detent from engagement with the rack. The latter under
the influence of a weight or its equivalent then returns to zero and, in returning,
renders the relay inoperative until the contacts in the clock are again established.
The paper from the roll passes over a roller connected with the clockwork and is
prevented from slipping thereon by means of pins and pressing wheels; the paper
being maintained in a state of tension by means of weights or springs which are
connected with the delivering and receiving rollers respectively; the action of this
mechanism being auxilliary to that of the clock.

page_text: -
Improved Means applicable to Anemometers and other Instruments
for Recording their Speed' of Rotation.
I, WILLIAM HAROLD TINGEY, B.A., of Rede Court, Rochester, in the County of Kent,
Cement Manufacturer, 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 relates to iniproved means applicable for use in the production of a
continuous record of the movements of revolving instruments, appliances or bodies,
the rotative speed of which varies from time to time.
In the accompanying drawings, I have illustrated my invention as applied; by way
of example, in recording the movements of an anemometer of the Robinson type.
Fig. 1 is an elevation of the mechanism of the anemometer; Figs. 2 and 3 being
respectively an elevation at right-angles to Fig. 1 and a vertical section. Fig. 4 is a
diagrammatic view of the recording mechanism. Fig. 5 is a front elevation on a
larger scale and Figs. 6 and 7 are transverse views. Fig. 8 is a plan corresponding
with Fig. 5 and Fig. 9 is a horizontal' section on the line -, Fig. 5.
The spindle a pertaining to the wheel b which operates the indicating mechanism
is provided with a loose sleeve or bush c formed of ebonite or other suitable non-
conducting material, and embraced for a portion of its circumference by a platinum
or other contact plate d. From this sleeve projects an arm or levere having a
weighted portion el at the outer end and arranged to engage with a pin or projection f
on the wheel b. Upon the rotation of this wheel--owing to the revolution of the ane-
mometer-spindle g and bevel pinion -the pin or projection fraises the arın or lever e
and rotates the sleeve c about its spindle a. The arm e, upon arriving at the
vertical position, falls.by gravity and, owing to the sleeve e being freely mounted on
the spindle, the said arm and sleeve swing round and rapidly assume a pendant
attitude; the contact between the platinum plate d and a pair of brushes i, ½ being
thereupon established and immediately afterwards broken. The brushes are prefer-
ably formed of steel wires tipped with platinum with a view to ensuring good
electrical contact with the platinum plate d. It will be seen that the adjustment of
the brushes in relation to the platinum plate is such that contact is only effected
during the falling of the arm e, and that this contact becomes broken upon the arm
arriving at the pendant position. The brushes may also be arranged in such a man-
ner that one of them acts as a detent to prevent the oscillation of the lever bringing
the platinum plate d back sufficiently far to make a second contact with the brushes.
The device is enclosed by a casing / which may be of brass; a hood or cap 1, arranged
to revolve with the anemometer spindle g, being provided for the purpose of excluding
rain. The anemometer cups are secured to the carriers g¹g', and the spindle g is
mounted, as to its lower extremity, upon a jewel g³, while, as to its upper end, it
revolves in a ball-bearing 93.
The effect of the contact of the plate d with the brushes i, kis to operate an
electromagnet m whereof the armature m¹ is connected by means of the link m² with
a pawl m³ which, when the said armature is attracted, imparts a longitudinal' move-
ment to a rack whereon the recording point or pencil o is mounted opposite a paper
clothed drum p. A detent q prevents the backwarditravel of the rack n. The paper
strip p is operated by clockwork the latter being furnished with contacts 8 8¹
which, at every minute or other predetermined period of time, operate a relay t
when the terminal y is in contact with the pendulum. The armature t¹ of the relay
operates in turn an electromagnet whereof the armature is connected with, and
draws down, the recording point o upon the paper pl. The recording point is
"

page_text: mounted to move freely beneath the rocking frame o¹; the latter being operated by
the armature u by means of the flexible connection 0. A spring o³ acting on the
pencil carrier o serves to raise the recording point out of contact with the paper.
Upon the contacts in the clock being broken, the armature t' of the relay t is released
and another electromagnet vis brought into operation for the purpose of releasing
the pawl n³ and detent 7 from engagement with the rack n. The pawl and detent
are respectively connected by links m and q with a frame 1, the latter being
vibrated upon the attraction or release of the armature v². The rack, under the
influence of a weight or its equivalent, then returns to zero, and, in returning
(the relay being inoperative), breaks the contact between to and a by reason of the
pin 2 striking the top of the lever t³.
The paper pl is supplied from the roll p² and passes over the roller p which is
connected with the clockwork r; it being prevented from slipping on the roller p by
means of pins p³ and pressing wheels p. The paper is maintained in a state of
tension by means of weights w wo¹ or springs which are connected with the delivering
and receiving rollers p² and p respectively; the action of this mechanism being.
auxiliary to that of the clock. The paper may be graduated in any required
manner.
The operation of the apparatus is as follows:-With each contact in the
anemometer, same occurring at every third revolution of its spindle g or other
determined period, the electro-magnet m is excited, its armature attracted and the
rack n advanced one tooth, the number of contacts occurring during say one minute
being recorded in the following manner:-At each interval of one minute 'the
arm is caused to vibrate the carrier 2 and effect the junction of the contacts s and 8¹;
while the pendulum with every complete swing makes contact with the set-screw
or terminal y. Upon these contacts in the clock occurring simultaneously the relay t
is brought into operation with the result that the armature is attracted and the
contact comes against the tail of the pivoted arm causing it to approach the
magnet t. This latter contact brings into operation the magnet u whose armature u¹
effects the depression of the frame of and causes the recording point o to be pressed
against the paper pl. The contact with y is now broken owing to the swing of the
pendulum; the armature of the relay being thus released and returned to its
normal position by means of the spring t. The contacts s s¹ have also been separated
owing to the radial movement of the arm releasing the carrier r². The contact t
thereupon comes against the tail of the pivoted arm bringing the magnet into
operation. This has the effect of disengaging the pawl m³ and detent from the
Tack n which latter immediately returns to its original position in readiness for another
record.
With a view to ensuring the last mentioned contact being maintained during, and
instantaneously interrupted upon the completion of, the return journey of the rack n
and recording point o, the rack is provided with a pin or stop 2 whereby the arm t³ is
vibrated and thus liberated from the contact 15; while the said arm is prevented from
touching the contact by limiting its movement in the slot formned for its passage
in the supporting plates.
Assuming, for example, that, during a minute of tiine, the anemometer revolves 30
times, 10 contacts will be made with the effect that the rack will be advanced 10 teeth;
the recording point moving a corresponding distance. At the termination of this period
of time, the recording point will produce a mark on the paper; a velocity of 10 miles
per hour being recorded, the graduations on the paper, in the present instance, repre-
senting miles per hour. If during the next minute 33 revolutions of the anemometer
occur, the rack will be advanced 11 teeth and a mark produced on the paper at the 11
mile line; it being understood that the paper is meanwhile fed forward by means of
the clockwork.
Owing to the rupture of the contact in the anemometer taking place as soon as the
advance of the rack has been. effected, no unnecessary discharge of the batteries takes
place.

page_text: Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I claim :-
1. The herein described method of recording the movements of a revolving body,
as, for example, an anemometer, wherein a recording point is operated at predetermined
periods of time by means of make-and-break contacts in conjunction with clockwork
mechanism, substantially as set forth.
2. The herein described means for recording the movements of a revolving body,
as, for example, an anemometer, same comprising a make-and-break contact in the
instrument or body, arranged to operate an electromagnet which effects the forward
travel of the recording point, clockwork mechanism arranged to operate a relay which,
in turn, brings into operation an electromagnet for effecting the record, and an electro-
magnet for bringing about the return of the recording point, the clockwork serving
moreover to feed the paper strip forward during the return movement of the recording
point.
3. The herein described mechanism, operating substantially as set forth, whereby
the electric circuit pertaining to the recording apparatus remains, normally open, and
only becomes closed during a predetermined portion of each revolution of the contact-
maker.
4. For use with revolving instruments, appliances or bodies whereof the rotative
speed: varies from time to time, a make-and-break contact arranged or operating
substantially as herein described.
5. Apparatus for recording the movements of revolving instruments, appliances or
bodies whereof the rotative speed varies from time to time, arranged or operating
substantially as described with reference to the accompanying drawings.
"
Dated this 3rd day of April 1900.
For the Applicant,
G. G. M. HARDINGHAM,
Chartered Patent Agent, Clun House, Surrey Street, London, W.C.