IMPROVEMENTS IN REGISTERING AND ALARM APPARATUS FOR PREVENTING FRAUD BY THE CONDUCTORS OF OMNIBUSES AND TRAMWAY CARS, AND FOR SIMILAR PURPOSES
Year: 1880

page_text: "
PROVISIONAL SPECIFICATION left by Henry Harris Lake at the Office
of the Commissioners of Patents on the 27th April 1880. A communication
from abroad by Newman Austin Ransom, of Chicago, Illinois, United States
of America.
HENRY HARRIS LAKE, of the Firm of Haseltine, Lake, and Co., Patent Agents,
Southampton Buildings, London. "IMPROVEMENTS IN REGISTERING AND ALARM
APPARATUS FOR PREVENTING FRAUD BY THE CONDUCTORS OF OMNIBUSES AND
TRAMWAY CARS, AND FOR SIMILAR PURPOSES." [A communication from abroad
by Newman Austin Ransom, of Chicago, Illinois, United States of America.]
This Invention relates to what are termed fare-registers, that is to say,
registering apparatus designed for use by the person in charge of a street-car or
other vehicle, for the purpose of keeping a record of the fares collected for inspection
at the main office, and to that class of such registering apparatus which have
'trip" registering mechanism, "total" registering mechanism, and an alarm to
attract the attention of the passengers as the fare is registered. The "trip"
registering mechanisin comprising two discs having numbers, the discs as each fare is
registered being revolved so as to consecutively bring into view the numbers thereon
to indicate the number of the fare. The "total" registering mechanism also com-
prising two revolving or rotary discs having numbers which are carried around
consecutively, and cannot be observed or noted except by opening the enclosing
case, the "trip" register being capable of resetting by the person using the register,
while the "total" register cannot be set except by taking the entire mechanism
apart, the trip register and the alarm being operated from the same lever, and in
such inanner that the alarm can only be sounded when the register is complete, and
the total register being advanced continuously through the action of the same
actuating lever, and in such manner as to shew the total fare irrespective of what
the trip register may indicate, no change being made in the state of the total
register by the resetting of the trip register, each register acting independently of
the other to perform their respective functions, and the whole enclosed in a casing 50
as to render the mechanism inaccessible except by opening the casing.
The objects of this Invention are the ensuring of a simultaneous sounding of an
alarm as the fare is registered, and preventing the alarm from sounding until the trip
registering discs have advanced the distance required for performing their office,
Pine A71

page_text: thereby preventing any half movement of the actuating lever from operating either
device without operating the other, making the operation of the devices contingent
one on the other, and dependent on a full stroke of the actuating lever, and tho
prevention of falso registrations or false returns by the resetting of the trip
registers by means of a check or tally operating in such manner and in such
relation with the trip registering devices that the check or tally will shew precisely
the point at which each resetting of the trip registers was performed, and the state
of tho total registers, thereby preventing any tampering or changing of the registers
to make them harmonize with the tally-card of the person in charge.
In carrying the said Invention into practice I provide two swinging pawls carried
and actuated by the same lever, one arranged to engage with and advance the
registering discs or wheels, the other to engage with and operate the bell hammer-
lever, the ends or arms of the pawls being engaged one with the other in the advance
movement; I also provide a locking pawl for engaging with the bell hammer
lever, a catch located on the actuating lever for raising the pawl and engaging
the bell hammer lever when released from its pawl, and a stop for disengaging
the actuating pawl of the bell hummer, the catch and stop arranged and operating
in such manner as to prevent any release of the bell hammer lover until the
actuating lover has completed its stroke; I also provide a gathering plate operating
to catch the trip register discs and carry them around to the zero or starting point;
also, a pinion for driving the gathering plate, which pinion can be revolved only in
the direction to revolve the gathering plate to gather the discs; also, stops or
catches located on the gathering plate and trip register discs to engage one with
the other, and a locking stop or catch to engage the gathering plate and stops the
movements of the plate when a full revolution has been made; also, an indicator or
tally operating in connection with the registering devices, and a mechanism for
marking or indicating on the tally the state of the trip register when reset; also, a
revolving drum carrying the index or tally operated from and coincident with the
total register disc, and an arm and a puncturing or marking point operated from
the gathering plate for indicating on the index or tally the resetting of the discs
also, a tally or index having a spiral line and transverse lines for shewing the
resetting of the trip registers and the state of the total registers; also, a raising
screw arranged to engage the puncturing end of the marking arm, and carry the
same upward coincident with the spiral line of the index and the travel of the
registering discs; also, a retainer located to press and hold the puncturing point in
engagement with its operating screw, and several other parts and combination of
parts hereinafter more fully described.
The casing may be made of sheet brass or other material, and of a form suitable
for receiving the registering mechanisms. The ends of the casing are preferably
circular, and one end is longer than the other, the longer end being designed for
the reception of the registering mechanism, while the small end is designed for the
reception of the bell and the mechanism by which each resetting of the trip register
is indicated.
the cover.
The back or cover is adapted to be attached to the sides in such manner as to
prevent access to the registering devices except by the entire or partial removal of
A portion of this cover is soldered to the side, and a part is hinged to
this portion so as to form a flap which can be swung open when desired, and which
when down or closed can be locked by a means of a lock or other device so as not
to be opened by the party using the register. A plate is provided supporting or
carrying the registering mechanism, and having a shape corresponding to that
of the casing so as to be easily inserted therein and fit the case snugly, lugs or
projections being provided on the sides on which the plate rests in such manner as
to prevent any contact of the registering devices with the casing that would prevent
their operation.
There is a wheel or disc for actuating the total registering discs, its periphery
being provided with a series of teeth or notches with which the actuating lever
successively engages for revolving the disc around its spindle or arbor, which

page_text: teeth also engage with an actuating lever or arm which moves the "total" registering
discs. There is a plate or disc interposed between the wheel and the actuating
and alarm striking devices, and held in position by suitable lugs on which it rests and
screws; this plate has a portion removed to allow of the movement of the actuating
lever when engaged with the wheel, and the portion remaining forms a bearing
for this wheel to rotate thereon. I provide an anti-friction plate located between
the wheel and the tens disc to prevent friction and binding; it is held in position
aud kept from revolving by the central arbor or spindle, and by having an arm or
portion extending out from its periphery and provided with an opening or notch to
engage a post or stud located on the supporting plate.
There are two "trip" registering discs or wheels, one registering the tens and
the other hundreds. Each disc is of a circular form, cut or otherwise formed from
sheet brass or other material, the diameter of the tens disc being slightly greater
than that of the hundreds disc. These discs are located and revolve around a
central arbor or spindle, and their peripheries are provided with a series of notches
with which the actuating lever engages to advance the discs, and in order that the
lever may engage the hundreds disc or wheel one of the notches of the tens disc is
cut deeper than the others to permit such engagement. The tens disc is solid and
has on its upper or outer face a series of figures running from zero to nine inclusive,
which figures are located on a circle on or near the edge or periphery of the disc.
The hundreds disc has portions removed leaving openings, and on the portions
between such openings are figures running from one to nine inclusive, and this
disc is so arranged with reference to the tens disc that the numbers on the latter
are visible through the openings, so that by means of the two discs figures repre-
senting any number from one to ninety-nine can be brought into view, one of the
figures of such numbers after ten has been reached by the tens disc appearing on
this disc and the other on the hundreds disc. There is a main actuating lever by
which the trip registering discs are revolved. The two portions of this lever stand
at an angle to each other, and the end of one portion which projects through the
case forms a handle by which the lever is removed; the other portion of this lever
is located entirely within the case, and is free to move in the space between the
supporting plate and the other plate, as is the case with that part of the handle
portion which is within the case. At the junction or angle of the two parts there
is a circular opening to receive a stud or boss located on the supporting plate at the
centre of its larger end, which stud or boss forms the bearing for the lever and
keeps it in position.
This stud or boss has a screw-threaded opening through it to receive a screw-
threaded arbor or spindle around which the wheel and disc are located and revolve,
and through this spindle or arbor is a circular hole or opening. On this spindle or
arbor is a circular collar or flange, and when the parts are in position the wheel,
anti-friction plate, and tens disc will be between this collar and the separating or
interposed plate, and will be held in position so as to revolve freely by inserting
the screw-arbor until the collar bears sufficiently tight to prevent end play. The
hundreds disc is located above the flango on the arbor or spindle, and is held in
place so as to be revolved freely my means of a set nut, suitable washers being
provided to prevent friction. provide an actuating pawl made of a single piece
bow-shaped, or having its two arins standing at an angle. This pawl is pivotted in
the outer end of the actuating arm, and its arms extend on each side of such arm,
one arm having at its outer end a stud or catch, which is arranged to engage with
the notches of the separating wheel, and of the trip registering discs, and is thrown
and held into engagement with such notches by means of a spring, one end of which
is firmly attached to the actuating arin on its underside, and the other or free end
enters a notch formed in the edge of the pawl, the spring acting in the direction
to throw the outer end of the arm of the pawl in or towards the trip registering
devices.
I provide a bell hammer actuating pawl pivotted to one arm of the actuating
lever near its upper end, and bent or curved so that the end of. one portion can be

page_text: made to engage with a notch in the hub of the bell hammer lever, while its other
arm is in contact with or engaged by one arm of the pawl, so that as the pawl is
moved by the lever one arm will, through the pawl and its engagement with the
notch, throw or carry the bell-hammer away from the bell, at the same time that
one arm is moving or carrying the wheel and the tens disc forward one notch, this
operation occurring as the pawl advances the wheel and disc. One end. is thrown
and held in engagement with the notch by the spring, one end of which is attached
to a projection, and the other, or free end, is arranged to bear against a pawl so as
to throw or carry the end in or towards the hub of the bell hammer lover. The
said end of the arm is disengaged from the notch by the other arm striking a stop
located on the supporting plate, and this stop is so arranged as to engage the arm.
When the first named portion of the lever has completed its stroke or been carried
or swung far enough to cause the pawl to move or advance the wheel and tons disc
sufficiently to register the fare by carrying them around the distance of one notch,
and no disengagement can take place and no alarm be had until the lever has
completed its strok. The lever is returned by a spring located on the underside of
the supporting plate, and having its free end passing through a slot in the plate and
engaging with a flange or a projection on the side of the lever, the spring acting to
permit one arm or portion of the actuating lever to be carried down, and when
the other portion is released to return the lever, the slot in the plate being of
such form as to permit the movement of the free end of the spring for this
purpose.
I also provide a circular plate, wheel, or disc, having at its centre a spindle
or trunnion which enters an opening in the screw spindle so as to permit the
disc to be revolved. On the periphery of the toothed disc is a series of cogs or
leaves, and on the underside of the plate or disc, near its outer edge or periphery, is a
spring plate or catch so located and arranged as to engage a projection or catch
located on each of the trip-discs, and carry the discs around with the toothed plate
or disc for the purpose of resetting the discs in proper position to bring the zero on
the tens disc beneath the window. There is an opening formed by removing a
portion of the last named plate, which opening is to be so located as to be in line
with an opening or window through the case when the register is in position for
use and not shut off; the numbers and the location of this opening, the spring
catch and the other catches, and the zero of the tens disc with referenco to each
other, is such as that when the wheel or plate has made a complete revolution, the
opening and the zero on the tens disc will be in line with each other and with the
opening or window in the case. A pinion is so located and arranged that its cogs
or leaves will be in mesh with the cogs or leaves of the said toothed disc or plate,
and having its shaft or arbor projecting through and having a bearing in the case.
I provide a button or head located on the end of the shaft or arbor of tho pinion
which projects through the case. By means of this button the pinion can be
revolved for the purpose of revolving the toothed plate, disc, or wheel to reset tho
trip-registering discs. I provide a bridge or supporting plate in which is the
bearing for the other end of the shaft of the pinion. It is supported above the first
named supporting plate by posts or pins, with ono of which the projection on the
anti-friction plate engages, and in the opening between the plates and the supporting
posts the bell lever is located. On the second supporting plate is pivotted a locking
pawl, so that its free end engages with the cogs or leaves, which pawl is held in
engagement by the spring, the free end of which bears against the pawl, its other
end being attached to the plate; the pawl prevents the rotation of the pinion in
the direction that will move the toothed plate, disc, or wheel backward, so that this
plate must move in the direction to gather the trip-discs and bring thein into
position to start anew from zero in making their registration. On the underside
of the second supporting plate or bridge is a sliding plate held in position by
suitable pins or screws which pass through a slot in to the plate in such manner as
to allow the sliding plate to slide back and forth; a knob which projects through
the side of the casing is attached to the end of the plate, and by pressing on this

page_text: knob the sliding plate is operated. In the edge of this plate near its outer end is a
notch which receives a short arm or projection attached to or formed with a head
or disc which is pivotted to the underside of the second supporting plate, and has
an arm which projects and is arranged in such manner as that the spring catch on
the disc or plate will bo brought in contact with its ends when a complete
revolution of the disc or wheel has been made, and prevent any further movement
until the stop is disengaged, thereby ensuring the stoppage of this disc and the
trip-discs at the zero mark. The arm is held down by a spring, the free end of
which bears on the arm, and its other end is rigidly attached to the second
supporting plate, and the arm is raised to permit the toothed disc or wheel to be
revolved by pressing in the knob which carries the sliding plate forward, and
through its engagement with one arm raises the other arm, the spring returning
the sliding plate and knob. When the knob is released the catch is made yielding
to allow the trip disc to revolve without being interfered with by the stops and
the spring-catch.
I provide a lever for moving the "total" registering dises or wheels. One
portion is pivotted near its centre to the underside of the first supporting plate,
and the other portion is attached to the end of the first portion, and extends out
therefrom at nearly a right angle, and is a single piece bent on itself so as to form
two parts united or closed at their outer end. The second portion overlaps the
actuating disc or wheel, the edge of which comes between its two parts, and is so
located and arranged that as the wheel rovolves the edge of each tooth will be
brought successively to bear against or on the closed end and carry the second
portion or arm outward, and with it the lower end of the first portion or arm,
causing the upper end thereof to be carried inward or toward the centre of the case.
The lever is returned after each tooth has passed the closed end of the second
portion by the action of a spring, the free end of which is hooked over or engaged
with this portion or arm, and its other end is rigidly secured to the upper face of
the first supporting plate. I provide an opening on this plate to allow of the move-
ment of the second portion or arm, and a corresponding opening is formed in the
separating plate for the same purpose, the opening in the first plate being such as
to permit of the passage of the end of a spring to catch the arm and allow the
required movement of the spring in operating the lever. At the upper end of the
first portion or arm of the lever is pivotted a log or pawl held down or in engage-
ment by a spring, the free end of which engages the dog or pawl, and its other end
is rigidly attached to a pin or stud on the ond of the arm above the pivotal point
of the pawl or dog. The actuating or engaging end of this pawl or dog is made
double, one portion being longer than the other.
There are two "total" registering discs, one registering the tens and the other
the hundreds. These discs or wheels are of a circular form, and are located on the
underside of the first supporting plate, the tens disc being next to the plate, and
are held in position around the arbor or spindle (the end of which passes through
the supporting plate for this purpose) by a lock nut or other suitable means on the
end of the spindle, between which and the plate the wheels are held in such manner
as to revolve freely. The diameter of the tens disc is a trifle larger than that of
the hundreds disc, and the face of each wheel or disc near the periphery or edge
has a series of numbers running from zero to ninety nine, and the periphery of
each wheel is provided with a series of teeth, one hundred in number, with which
the teeth of the pawl or dog engage, one of the teeth of the tens wheel being cut
deeper to allow a tooth to drop and cause another tooth to engage the teeth of the
hundreds-wheel, which engagement takes place when the tens-wheel has made one
complete revolution or registered one hundred fares, at which time the hundreds
wheel is to be advanced one notch or tooth. These discs or wheels keep an accurate
register or account of all fares received and registered by the trip register, and such
register is unchangeable, not being capable of being reset when desired, so that by
reference thereto the total number of fares received and registered can be ascertained;
and in as much as the advancement of these discs is by. means of the same lever

page_text: that advances the trip-discs, it follows that such advancement must shew tho total
of the trip-register if it had not been reset.
I provide a train of gearing the cogs or leaves of which mesh with each other so
as to drive the several wheels from one wheel which is rigidly attached to the "total"
tens wheel at its centre. The arbor or spindles for the wheels are stationary and
located on the first supporting plate, and these wheels are loose and revolve around
their arbors or spindles. The spindles or arbors of two of the wheels project somo
distance above the face of the wheels, and around the arbor or spindle of one of
these two wheels is a circular collar or bearing having a screw-thread around its
periphery, and around the spindle or arbor of the other of these two wheels is a
square collar or bearing. At the lower end of each collar or bearing and bearing on
the face of the respective wheels is a ratchet pinion with which a spring pawl or
ratchet, located on the face of the respective pinions engages in such manner as to
lock the first two of the three wheels to the collars, so that the wheels and collars
will be locked together when moving in a forward direction, but will be unlocked
or disengaged if the collars are turned independently, thereby preventing any
back ward movement of the wheels from the collars and consequent turning back of
the total register discs.
I provide a circular drum made of wood or other suitable material, and having at
its centre a square opening to receive one of the bearings or collars, so that by the
forward movement of the last wheel the drum will be carried forward.
I also provide a strip of paper or other material wound around the drum. On
this paper is a number of parallel horizontal lines and a number of transverse or
vertical lines. The horizontal lines when the paper is around the drum form a
spiral line, and the pitch at which it stands corresponds to the pitch of the screw-
threads on the collar or bearing, and the distance between the lines of the spiral is
the same as that of the screw-thread, and they correspond in number to the number
of working threads on the collar or bearing. The transverse or vertical lines
correspond in number to the number of teeth on the "total" tens wheel, and they are
located at a sufficient distance apart to leave a space between each one to be
punctured or marked for each tooth, for instance, if 100 teeth are on the tens-wheel
the number of transverse lines on the paper must be sufficient to leave a corresponding
number of spaces, and if ten working threads are on the screw ten horizontal lines
must be on the paper to form a spiral of that number of lines. The paper may be
attached to the drum in any suitable manner that will permit of its easy removal.
One end may be inserted in a slit cut in the drum, and the paper is wound around
the cylinder and its other end gummed or otherwise fastened to the inserted end.
The horizontal lines are so formed that when the paper is wound around the drum
the end of the first line will meet and correspond with the commencement of the
second, and the end of the second with the commencement of the third, and so on,
the last line ending where the first began but at the other end of the drum. By
this arrangement the drum has a spiral line around it corresponding to the spiral of
the thread.
There is a reciprocating bar, ¡the upper end of which is sharp pointed. The
length of this bar is sufficient so that when advanced its end will be brought in
contact with the paper, and have its point puncture or mark the same, and its
upper end rests in the threads of the screw, so that as the screw is revolved the
action of its threads will raise the end of the bar.
I provide an excentric or cam-head screwed or otherwise secured to the end of
the shaft or spindle of the aforesaid toothed disc, plate, or wheel, so that as the said
wheel is revolved the excentric will be turned. It is located in an opening formed
in the enlarged portion of the bar, and is so arranged that its periphery will come
in contact with flanges and reciprocate the bar, the contact with one of the
flanges advancing the bar and with the other flange receding it, and it is so located
with reference to the toothed wheel that when the wheel begius its rotation the
cain will act on one flange and advance the bar, and cause its point to pierce the
paper, and have the point receded when the wheel has completed its revolution.

page_text: On the lower end of the bar is a cross-piece projecting each side of the bar and
forming arms, which project beneath guides located on the face of a supporting
plate, fer the purpose of holding the bar in position and permitting a reciprocating
movement. This plate is located in the case above the "total" register wheels,
and forming a support for the arm and other devices. In this plate is a window,
through which the numbers on the "total" register discs can be seen, a single
number on each only being visible for the purpose of shewing the state of the
register. This plate is secured to the sides of the case in such manner as not to be
easily removed, and forms a guard to prevent the "total" register discs from being
reached so as to be tampered with, and it may extend the entire length of the case
or only part way. When extended the whole length the aforesaid drum may be
located thereon, otherwise it is located on the first named supporting plato.
A block is located in close proximity to one of the screw-collars on a suitable
arbor or spindle, and so arranged as to bear against the point of the bar and hold
it in the grooves of the screw-thread, so as to ensure the raising of the point by the
action of the screw collar.
The arrangement of the train of gearing is such that the movements of the drum
and screw-collar will be coincident with each other and with that of the "total."
tens wheel, and the location of the point of the arm in the grooves of the screw
collar causes it to follow the course of the thread of the screw, and consequently
that of the spiral line on the drum, so that as the drum is revolved the point will
follow in the track of the spiral line, and when advanced will pierce the spiral lino
at some point, which point will correspond to the number of fares shown on tho
"total" register discs. The point of the bar when the register is first set for use is
so placed as to be at the beginning of the spiral line on the drum.
The bell-lever has at its lower end a hub or enlargement with a suitable opening
to receive a stud or boss, and pivot the lever at that point, and having at its
upper end a suitable point for striking the bell. This lever is operated and carried
away from the bell by the engagement of the arm of the pawl with the notch,
and is returned when the engagement is released by the action of a spring, one
end of which engages the lever, and the other is attached to the face of the first
named supporting plate.
A depression is provided in the case to receive an ordinary bell, which is so
located as to be struck by the head.
I provide a locking pawl pivotted to the face of the first named supporting plate,
and having its free end engaged with a series of notches or teeth on the edge of
the enlargement, and held in engagement by the action of a spring, one end of
which bears properly on the pawl, and the other is fastened to a stud on the plate.
This pawl prevents the lever from being thrown back so as to ring a false alarm,
and in order to release the lever at the proper time a catch is located on the end
of a short arm of the actuating lever, which is so arranged as to strike the pawl
and release it, and have this point or catch engage with a notch, and still hold the
lever from acting, which engagement will continue until the actuating lever has
completed its throw and advanced the trip-registering discs one notch, at which
time the arm strikes the stop and releases the catch from the notch, and the lever
is returned by the spring, and simultaneously the catch is released and another
spring causes the lever to be returned, sounding the alarm.
There is a swinging door or cover having a notch therein to receive one arm of the
actuating lever. It is triangular in form, with its base on a circle corresponding
to the bottom of the case, and is pivotted at its apex or point to the spindle, and
is so located us to swing within the case and keep the opening for the passage of
the arm of the lever closed, and preventing any tampering with the mechanisin at
that point. This door or cover swings with the said arm of the lever.
In manufacture the registering devices are attached to the supporting plate and
the plate inserted in the casing, then the plate is inserted and secured in place, and
the arm arranged to start at the commencement of the spiral line, the cover is
then placed in position and locked and the device ready for use.

page_text: In some cases the transverse lines of the paper may be extended up and divided
off into series of forms for easy reference.
Another form of construction of the trip-register detector or index is as follows,
that is to say-I provide a fint bar, the lower end of which has a longitudinal
slot in which is located a pin or roller on the end of a short crank, the other end
of which crank is firmly attached to the end of the spindle so as to be turned
with the revolving of the toothed wheel. At the upper end of the bar is a sido
extension or arm which bears upon a spring point which punctures the paper.
In place of the drum a metallic disc having its periphery provided with a series
of notches or teeth is used, which disc is advanced by means of a drawing pawl
pivotted to the upper end of a lever or arm, and having its free end arranged to
engage the teeth on the disc, and the disc is held from backward movement by a
spring catch which engages the teeth or notches. On the under face of the disc is
a spiral groove with which a pin engages, which pin is located on the upper end
of a flat bar. The upper end of this bar has a slot in which is located the arbor
of the disc, and its lower end has a slot to receive a stud or pin located on the
face of the plate, which prevents any swing movement of the bar and allows it to
reciprocate. This bar is pivotted to the other bar by an arm or extension, between
which and the arm is located the spring arm or point. The paper or index in
this form of construction is of a circular form and is located on the upper face of
the disc, and the spiral line corresponds to the spiral groove on the under face of
the disc, the transverse lines being radially arranged to cross the spiral line in which
such radial lines are partly carried out. In this form of construction the train of
gearing is dispensed with, the disc being advanced by the drawing pawl direct
from the arm of the lever which advances the "total" register discs, so that such
advancement must be coincident with that of the registor-discs.
I may also adopt another form of devices for shewing the resetting of the trip-
register. This mechanism is constructed as follows:-1 provide a flat-bar having
at its lower end a slot to receive a stud or pin on the plate to permit the bar to be
reciprocated, and at its upper end a point having an inclined or wedge shape. To
this bar is pivotted one end of a bar the other end of which is pivotted to a crank,
which crank at its other end is firmly attached to the spindle of the toothed wheel,
so that the revolving of the wheel will turn the crank and reciprocate the bar;
there is a metal disc having a spiral groove on its upper face to receive a pin on a
slide, which slide is made in two sections, the lower one being stationary and
forming a support for the upper or sliding section, and having a slot through
which the pin passes, the pin being located on the upper or sliding section; a guido
is provided on one end of the stationary section to keep the slide in place. The
paper in this form of construction is carried by a stationary circular cap picco
located above the disc around the arbor or spindle thereof, and has a spiral line
corresponding to the spiral groove intersected by radial or transverse lines.
This paper is held in place by a washer having pins which pass through the cap
piece and are engaged by a slide to lock the washer in position. The spindle or
arbor of the disc projects beyond the cap-piece and has an opening to receive the
taper on the bar, so that by the forward movement of the bar the cap will be
passed down, forcing the paper on to the puncturing point which is carried by the
sliding portion of the slide and indicates the resetting of the trip-discs.