Improvements in Cash Registers.
Year: 1896

page_text: Date of Application, 2nd Nov., 1896-Accepted, 23rd Oct., 1897
COMPLETE SPECIFICATION.
Improvements in Cash Registers.
I, HERBERT JOHN HADDAN, of the Firm of Herbert Haddan & Co., Patent Agents
of 18, Buckingham Street, Strand, W.C. London, Civil Engineer, do hereby declare
the nature of this invention a communication to me from abroad by The National
Cash Register Company, of Dayton Ohio, United States of America and in what
manner the same is to be performed to be particularly described and ascertained in
and by the following statement:-
The invention relates more particularly to registering devices for cash registering
machines, such, for instance, as that shown and described in Patent No. 10213 of
May 23, 1893, but it is applicable as well to other classes of registers. One feature of the
invention relates to novel means for resetting the registering wheels or returning
them to zero or initial position; another to novel means for actuating the transfer
pawls; another to novel latches co-operating with such pawls; another to the means
for resetting the registering wheels or returning them to zero or initial position, at the
end of a day's business or such time as the reading is taken from the wheels, and con-
sists in the provision of an automatic stop which arrests the parts at the end of their
resetting movement and prevents them being turned beyond initial position; and the
last to the transfer devices between the several wheels, and consists in the provision
of locking devices controlled by the cams which actuate the transfer pawls, whereby
such pawls are normally locked from movement but are automatically released by the
cams preparatory to the actuation of the pawls by the cams; all as will be hereinafter
more fully described and particularly pointed out in the claims.
Referring first to Sheet 1 of the accompanying drawings illustrating the first three
features of the invention, Figure 1 is a perspective view of the register of one of the
common forms of machines built under the beforementioned patent, with some of the
features of the present invention applied thereto; Figure 2 an end view of the beveled
pinion and surrounding flange upon the end of the shaft which supports the register-
ing wheels; Figure 3 a detailed view of the opposite end of the train of registering
wheels; Figure 4 a detailed vertical section on the line 4-4 of Figure 1; Figure 5
a detail of one of the registering wheels, showing the pawl which is carried by it and
co-operates with the notch in the shaft; Figure 6 (Sheet 2) a vertical section of a
cash register embodying the present invention; Figure 7 a detail view of the
mechanism employed in the machine of Figures 6 for actuating the rotary shaft;
Figure 8 a detail view of such shaft and the parts carried thereby; and Figure 9 a
sectional detail through the rotary shaft of the registering device.
Referring to Sheet 3 of the drawings, Figure 1A represents a perspective view of a
register similar to that shown in Figure 1 on Sheet 1, with additional features of the
present invention applied thereto; Figure 2 a vertical section thereof; Figure 3 an
elevation of the left hand end of the same-the end opposite that shown in Figure 1^;
Figure 4 a detail view of some of the parts shown in Figure 34, but in a different
position; Figure 5A a view corresponding to Figure 4^ with the parts in still another
position.
Referring now to Sheets 1 and 2 of the drawings, the machine shown in Figure 6 is
the same, in its general features, as that described in the letters patent heretofore
mentioned, and will be here described only so far as may be necessary to an under-

page_text: standing of the present invention. The key levers A' are faleramed on the horizontal
rod B' and rest at their rear ends upon the cross-bar C¹ of the framework and play up
and down in vertical slots in the guide-plate D, and carry upon their rear ends the
vertical rods E¹ provided at their upper ends with the indicators F, said rods having
collars G¹ upon them which co-operate with the usual pivoted supporting bar H¹ to
temporarily support the indicators in elevated position.
Overlying the entire lot of keys in the machine is the cross-bar I provided at its
opposite ends with supporting side arms J which are pivoted at their front ends to
the side plates of the framework at K. The rear edge of this bar is provided with a
projecting flange which rests upon the upper edges of the key levers and co-operates
with slotted lugs L thereon, to connect the operated keys to the bar I', as usual.
The key levers have pivoted to their sides near their rear ends graduated lifters M¹
which co-operate with the rods N¹ of the registering frames O' which are mounted
upon the shaft P. There is provided one of these registering frames for each set or
group of keys in the machine, and the lifters M of the keys of each group are so
graduated that they engage the rod N1 of their co-operating frame 01 at different
points in their upward movements, so that the operations of different keys in the set
will impart different degrees of movement to the fratne, proportionate to the values
of such keys. Each of the registering frames O' has fast upon it a gear-tooth sector Q,
which sectors co-operate with pinions R' fast upon the hubs or sides of the registering
wheels A (see also Figure 1), which registering wheels are mounted upon a rotable
shaft B which is supported in the upper ends of the side arms of a rocking frame C
which is pivoted at its lower end upon a rod SI supported in the framework. The
frame C has fast upon its right side Figure 1, a horse-shoe shaped plate K whose two
rearwardly extended arms carry friction rollers T U co-operating with two
cams V₁ W₁ fast upon a rotary shaft X1 (see also Figure 6) suitably mounted in the
framework and given a complete revolution at each operation of the machine by the
means hereafter described. By such means at the complete downward stroke of any
operated key the shaft X' and cams V₁ W₁ are given a half revolution in the direction
of the arrow in Figure 1, while at the return upstroke of such key they are given
another half revolution and brought to initial position. It will be seen from Figure 1
that at the first forward movement of the shaft and cams the shoulder upon the lower
side of the cam V1 will engage the friction roller U¹ of the lower arm of the frame K,
while at the same time the shoulder at the upper side of the cam WI will be carried
from under the roller T of the upper arm of said plate, with the result that said plate
and the arm C will be rocked on their pivotal support St and the train of registering
wheels be thrown rearward and the pinious R¹ engaged with the sectors Q. This
operation takes place before the sectors are moved by the operated keys, so that the
movements imparted to the sectors by the forward strokes of the operated keys are
transmitted to the registering wheels and the values of such keys thereby registered.
At the end of the downward strokes of the operated keys the half revolution given
the shaft X' and cams V1 W₁ as before explained, will have brought the cams diame-
trically opposite the positions they occupy in Figure 1, with the result that the
shoulder on the lower side of the cain W in Figure 1 will stand at the upper side of
said cam and immediately in rear of the roller T', while the shoulder at the upper side
of the cam V¹ in Figure 1, will stand at the lower side of said can immediately over
the roller U, with the result that at the beginning of the second half revolution of
the parts, at the return up-strokes of the operated keys, the plate Kand frame C will
be rocked back to the position shown in Figures 1 and 6, and the pinions R' be
thereby disengaged from the sectors, so that the return upward movements of the
latter will not be imparted to the registering wheels.
The mechanism for rotating the shaft X is located at the right side of the machine,
just within the right hand side plate of the framework, and hence does not appear in
Figure 6. It is shown in detail in Figure 7, where it will be seen that the cross bar 11
overlying the key levers is provided upon its end with a stud Y' which projects
through a horizontal slot in a vertical bar Z, which bar is provided at its lower end
with a vertical slot A2 which fits over a stud or boss B2 projecting inward from the side

page_text: plate of the framework, by which slot and stud the lower end of the bar is guided
in the vertical movements imparted to it by the raising and lowering of the cross-
bar I at the operations of the machine. The upper portion of the bar is provided
with a wide vertical slot whose opposite walls are provided with gear teeth, thus form-
ing two racks C D. The rotary shaft X projects through this slot, between the two
racks, and has fast upon it a pinion with which the racks are alternately engaged.
At its extreme upper end the bar is provided with a housing in which are confined
two spring-pressed plungers F G, projecting upon opposite sides of the bar, and
adapted to co-operate respectively with two inclined ribs or lugs H' I' formed upon
the inner side of the side plate of the framework. Intermediate these two lugs the side
plate of the framework has formed upon it a vertical rib or lug J2 with which
co-operates a projection K' upon the bar Z.
Under the construction above described it will be seen that when the cross-bar I'
is lifted by the downward stroke of the front end of any key lever A¹ the bar Z will
be lifted and its rack C2 caused to turn the pinion E2 and shaft X¹ forward, in the
direction of the arrow, the adjustment of the parts being such that the complete
downward stroke of the key lever will cause a half revolution to be imparted to the
pinion and shaft. During this upward movement of the parts the projection K' upon
the upper end of the bar Z will travel upward upon the left hand side of the rib J².
As the plunger T engages the inclined surface of the lng H2 the upper end of the
bar Z will be pressed toward the right, but the engagement of the projection K' with
the rib J will prevent it moving in that direction until said projection clears the
upper end of the rib J, with the result that the plunger F will be forced to the right
into its housing and its spring put under tension, so that the instant the projection K²
clears the upper end of the rib J2 the upper end of the bar will be thrown to the
right, and the lower end of the left hand rack D be engaged with the pinion E
At the downward movement of the parts, upon the return of the operated key
lever or levers to normal position, the rack 1 will turn the pinion and shaft forward
a second half revolution, thus causing them to be given a complete revolution by
the upward and downward movements of the parts. At such downward movement,
the projection K will pass down along the right side of the rib J2, and as the
plunger G engages the inclined surface of the lug 1 the upper end of the har Z
will be pressed towards the left, but the engagement of this projection K with the
rib J will prevent movement of it in that direction until the downward movement
of the parts is completed and the projection clears the lower end of the rib J2,
whereupon the spring acting upon the plunger G, which has been put under
tension, will throw the upper end of the bar 2 to the left, into the position shown
in Figure 7, ready for the next operation.
As seen in Figures 1 and 6 each of the three right hand registering wheels has
fast upon its hub, at the right of the wheel, a ratchet 12, with which ratchets
spring-pressed holding pawls M, pivoted in the frame C, engage, to prevent back-
ward movement of the wheels. With the ratchets of the second and third wheels
there also co-operate the transfer pawls N, by which at each complete revolution
of the first wheel the second wheel is advanced one number, and at each complete
revolution of the latter wheel the third wheel is advanced one number. (The
transfer between the third and fourth and the higher wheels in the series are effected
by another form of transfer device which has nothing to do with the present invention
and which therefore need not be described.) The transfer pawls N² are pivoted in
and carried by the upper forward ends of long curved levers O' which fit in slots in
the lower part of the frame C and are fulcrumed upon the pivotal rod S' of said frame.
The rear ends of these levers project. rearward into position adjacent the rotary
shaft X, and carry upon their rear ends friction rollers P2 with which co-operate
cams QR upon the shaft X', Figure 6, with the result that at each complete
revolution of said shaft the rear ends of the levers 02 are depressed and their upper
forward ends thrown rearward carrying the transfer pawls N2 with them. The rear
ends of these pawls N are normally held up in such position that they cannot engage
the ratchets 1 with which they are respectively designed to co-operate. To this

page_text: end each pawl is provided with a lateral projection S which rests upon a shoulder
formed upon the upper end of a latch T pivoted in the frame C at the right of the
pawl and engaged by a spring U which presses the upper end of the latch rearward,
the engagement of its upper end with the projection S of the pawl preventing
rearward movement of the latch, under the influence of its spring Us, except when
the pawl itself moves rearward. Springs V2 confined beneath the front ends of the
pawl N2 tend to throw their rear ends downward, and do so whenever the upper ends
of the latches T are thrown forward from beneath the projections S of the pawls.
Each latch T is arranged in line with a projection W2, Figure 9, upon the hub of
the registering wheel adjacent said latch, and the latch is provided with a rearwardly
extending projection or tooth adapted to co-operate with the projection W upon the
hub of the wheel, with the result that at each complete revolution of the wheel the
projection We will engage the latch and throw its upper end forward and release
the pawl N, whose rear end will then drop sufficiently to bring it into position to
co-operate with the ratchet L of its wheel. It will be understood from Figures 6
and 9 that the ratchet with which the pawl N in Figure 6 co-operates is not the
ratchet shown in full lines in Fig. 6, but is the ratchet of the next higher wheel
toward the left, (shown in dotted lines in Figure 9) while the latch T shown in
Figure 6 co-operates with the projection W2 of the registering wheel A shown in said
figure, said wheel standing between the latch and its co-operating pawl N.
From the foregoing description it will be understood that at each operation of the
machine the pawl levers 0 are engaged by the cams Q R and the pawls N³ thrown
rearward. So long as both pawls are supported upon the upper ends of the latches T
their rear ends will play idly over the upper sides of the tooth a of the respective
ratchets, and the latter and their registering wheels will not be turned; but when
either latch has been tripped by a complete revolution of its co-operating registering
wheel the pawl N co-operating with the next higher wheel will drop into position
to engage the tooth a of the ratchet of such wheel, and at the rearward movement
of the pawl the wheel will be advanced one number.
Inasmuch as the only thing holding the latches 12 in their forward positions,
against the pressure of their springs U2, is the engagement of the projections S2 of
the pawls N2 with the upper ends of the latches, it follows that at the rearward
movement of the pawls the upper ends of the latches will move rearward with them,
and that in the ordinary operation of the pawls (when no transfer is to be effected
and the latches have not been tripped) the projections S2 of the pawls will remain in
position upon the upper ends of the latches during their entire backward and forward
movements, with the result that, except when the latches are tripped, they constantly
support the pawls during all the movements of the latter, and there is no disengage-
ment of the projections S from the latches, and no danger of such disengagement. In
the transfer devices of these registers, as heretofore constructed, it has not been possible
for the latches T to follow and support the pawls during their complete rearward
movement, the result being that the projections S2 of the pawls would be entirely
disengaged from the upper ends of the latches during the latter portion of the
rearward movement of the pawls, and the rear ends of the latter would be supported
simply by resting upon the upper sides of the teeth a of the ratchets. When the
pawls were thrown forward again to normal position the projections S2 would again
pass over and rest upon the shoulders of the upper ends of the latches. Owing to
this disengagement of the projections S from the latches, however, it sometimes
occurred that at the return forward movements of the pawls their projections S² would
not pass above and rest upon the shoulders of the latches but would strike the rear
edges of the latches at the corner forined by the rear end of the shoulder and the
vertical rear edge of the latch, so that the upper end of the latch would be carried
forward with the pawl, and the latch come to rest in tripped position, with the pawl
set to turn its ratchet at its next rearward movement. In order to prevent such
improper operation of the parts extreme care had to be exercised in constructing and
adjusting then, and even then the improper operation was liable to occur.
present invention this difficulty is overcome by so arranging the latches T² that their

page_text: upper ends may follow and support the pawls during their entire rearward movement.
and never become disengaged from the projections S except when they are tripped
preparatory to the making of a transfer. Under this arrangement much less care is
required in the construction and adjustment of the parts, while the possibility of error
in the registration is removed.
It will be understood that when a latch is tripped and its pawl is set, and then
thrown rearward, its rear end, as it engages the tooth of the ratchet at a and turns the
latter rearward, will be lifted by the next succeeding tooth of the ratchets, as the
latter is brought to the position of the tooth a in Figure 6, so that the projection S* of
the pawl will be again carried above the plane of the shoulder of the latch. Inasmuch
as the latch has followed the pawl in its rearward movement, and its rear-edge
immediately below its shoulder is bearing against the forward side of the projection S³
of the latch, it follows that as soon as the rear end of the pawl has been lifted, in the
manner above explained, until the projection St is carried above the plane of the
shoulder the latter will immediately catch under the projection St again, and thus
serve to support the pawl in its upper position at the beginning of its return forward
movement. The pawl will thereupon carry the latch forward with it, and the parts
will come to rest in the position shown in Fig. 6.
If the latch T could not inove further rearward than its position shown in Figure 6,
and follow the pawl in its rearward movement, it will be seen that at any return
forward movement of the pawl its rear end would slip off the point of the tooth a
almost at the instant the forwand edge of its projection S reached the rear end of the
shoulder of the latch T, with the result that, as has heen explained, the projection S
would be liable at times to strike the rear edge of the latch below its shoulder and
carry the latch forward to tripped position and leave the pawl set for a transfer.
Under my improved arrangement of the parts the proper re-engagement of the
projection S2 with the shoulder of the latch T2 is insured not only at the return
forward movement of the pawl N2 after having made an idle rearward stroke, and
effected no transfer, but also at its return forward movement after having made a
transfer.
The next feature of my invention relates to the cams QR for actuating the pawl
levers 02. It will be understood, from the position of these cams, that they do not
engage the rear ends of the levers 02 until the second half of the revolution of the
shaft X and consequently not until after the sectors Q have transmitted their
movements to the registering wheels and the pinions It of the latter been disengaged
from them. Under ordinary operations of the machine, therefore, the rotary shaft X,
at the time the cams Q2 R2 engage the pawl levers, is being moved solely by the
action of gravity or the springs which reset the various parts of the machine after the
front end of the operated key lever has been released, such release being of course
given at the end of the downward stroke of such lever. Under such conditions the
cams Q2 R2 do not strike the rear ends of the levers 02 with any considerable degree
of force or violence, so that such levers and the transfer pawls are moved with ease
and the parts properly operated. Inasmuch, however, as the second half revolution
of the shaft takes place during the return upward stroke of the operated key levers,
and inasmuch as the rear ends of the levers are positively connected to the rear edge
of the cross-bar I', by whose downward movement the second half revolution of the
shaft. X is effected in the manner explained in connection with Figure 7, it follows
that if a person desiring to damage the machine, or cause it to operate improperly,
shall retain his hold upon the front end of the operated key lever at the end of its
downward stroke, and shall then positively lift it to norinal position quickly and
forcibly, such positive movement will be imparted to the shaft Xand the cams Q² R²
be caused to strike the rear ends of the pawl levers with greatly increased speed and
force, the result of which will be that the transfer pawls N2 will be thrown rearward
so quickly and violently that if either of them happens to be set for a transfer, so as
to engage the ratchet of its co-operating wheel, it will be liable to strike the ratchet
such a blow as will cause the wheel to be turned more than one number, and an
improper registration thus be made. It is a matter of common knowledge that

page_text: machines of this character are often placed in the hands of clerks who object to using
them, and who desire to cause them to work improperly by any means in their power,
and they are often subjected to such severe usage, in attempts of this kind, as to
seriously damage them, and sometimes to even break off the front ends of the steel key
levers. It has been found from practical experience that efforts to cause improper
registration, by violently returning the operated lever or levers to normal position in
the manner above described, frequently occur, and are sometimes successful. The
present invention overcomes this difficulty, and renders it impossible to cause the
cams Q to strike the pawl levers 0 with anything more than a substantially
normal degree of force. This result is accomplished by loosely mounting the
catns Q R upon the shaft X, (instead of rigidly securing them thereon as heretofore,)
and connecting them to the shaft by means of a spring, whereby said cams are
permitted to yield when caused to strike an obstacle with undue force. The spring
connecting the cams to the shaft is of sufficient strength to overcome the
resistance offered by the pawl levers under normal operations of the machine,
so that in such cases the cams act as though they were fast upon the shaft;
but if the shaft be operated very quickly and the cams caused to strike the pawl levers.
with excessive force the resistance offered will cause the spring to yield and be put
under tension, so that the blow given by the cams is cushioned and diminished by
their yielding connection with the shaft. As seen more particularly in Figure 8 the
cams Q2 R2 are formed upon a sleeve A³ loosely mounted upon the shaft X at the
left of the cams V1 W heretofore described. Interposed between the left hand end of
the sleeve A³ and a collar B³ fixed upon the shaft X is a spring C³ coiled around the
shaft X (in this instance around the reduced end of the sleeve A³) and fastened at its
left hand end to said collar and at its right hand end to the sleeve A³. The right
hand end of the sleeve A³ is cut away for a portion of its circumference to form a
shoulder which abuts against a lug D³ upon the shaft X, the engagement of the
shoulder with this lug limiting the movement of the sleeve As under the influence of
the spring C³, while the cut away space permits the spring to turn in the opposite
direction when sufficient force is supplied to it to overcome the tension of the
spring.
It will be evident that the cam or cams may be yieldingly connected with the
shaft by an interposed spring in other ways than by the specific arrangement which
I have shown and described.
The next feature of the invention relates to the novel means for resetting the
registering wheels, at the end of a day's business, or at such other time as the reading
has been taken from the wheels. The shaft B, upon which the train of registering
wheels is mounted, projects at its opposite ends beyond the side plates of the frame C,
and at its left hand end has fast upon if a disk D, Figures 1 and 3, which has in its
periphery a single notch with which co-operates the rear end of the left hand side
arin E of a pivoted frame F, Figure 1, pivotally supported by its two side arms upon
the frame C or a rod passing through the same, and yieldingly held by a spring G in
normal position, with the rear end of its left hand arm E pressed against the
periphery of the disk D. When the shaft B is in normal position the end of the
arm 'E fits in the notch in the disk D. When the shaft is turned the end of the arm
is forced out of the notch, as the periphery of the disk rides under the end of the arm,
and when the shaft completes a revolution and the notch is brought opposite, the end
of the arm snaps back into it and serves to yieldingly hold the shaft in normal
position. Each of the registering wheels A carries upon its left hand side, Figure 5,
a pivoted pawl H which is spring pressed against the shaft B, a notch in the hub of
the wheel permitting the end of the pawl to engage the shaft. The shaft is provided
with a single longitudinal notch or groove which has an abrupt wall or shoulder at
one side and a beveled surface at its opposite side, so that when the wheels are
turned in the direction of the arrow in Figure 5, in the operation of the register, the
pawls may slip idly over the groove in the shaft; but when the shaft itself is turned
in the direction of the arrow the abrupt wall of its groove will contact with the ends
of the pawls and pick up the registering wheels, in whatever position they may be

page_text: standing at the beginning of movement of the shaft, and carry them around with it,
so that a complete revolution of the shaft in such direction will serve to reset all of
the registering wheels to zero or initial position, as is common in this class of
devices.
Fast upon the right hand end of the shaft B, which projects to the right of the
frame C, is a beveled pinion I, while surrounding said pinion, and fast upon it or
upon the shaft B, is a flanged disk J whose flaring flange encloses the beveled pinion
and projects to the right flush with or beyond the vertical plane of the pinion, Figure 4.
Secured to the right hand side of the frame C, in this instance screwed to the right
hand side of the plate K which is fast upon the side of the frame C, is a housing L
which is provided with a vertical bore adapted to receive the shank of a key M which
has fast upon it a beveled pinion N adapted when the key is inserted in place, to
mesh with the beveled pinion I fast upon the shaft Band serve as a means for turning
the shaft. B and resetting the registering wheels. A pin O is passed through the
housing I, from its outer side and projects at its inner end into the vertical bore in
said housing, and the lower end of the shank of the key M is provided with a
longitudinal groove to co-operate with the pin 0, thas serving to prevent the
insertion of the key except in proper position, with the groove P in line with the pin.
The groove P communicates at its upper end with a circumferential groove in the
shank of the key, which circumferential groove permits the key to be turned after
having been inserted in place, while the co-operation of the pin O with such latter
grooves serves to lock the key in position, after it has been slightly turned, and
prevent its withdrawal before it has completed a revolution. If the pinion N were of
the same size as the pinion I a single revolution of the key would impart a complete
revolution to the shaft B and serve to reset the register wheels, but inasmuch as the
pinion N, as shown, is considerably smaller than the pinion I, it follows that several
revolutions of the key will be necessary to give the pinion I and shaft B a complete
revolution. To permit the downwand passage of the pinion N into mesh with the
pinion I when the key is inserted the flange of the disk J is provided at its upper
side with a recess or notch a. After the key has been inserted and slightly turned
this notch a will have been carried away from normal position and the projecting
flange of the disk J will have moved over the inner edge of the pinion N, and will
then serve to lock the pinion N in mesh with the pinion I and prevent the withdrawal
of the key until the pinion I and shaft B have been given a complete revolution and
the registering wheels been returned to initial position by which latter movement
the notch a will have been brought to position above the pinion M again, while the
groove P in the shank of the key will also have been brought into line with the pin 0,
so that the key is free to be withdrawn.
It will be understood from the foregoing that the co-operation of the flange of the
disk J with the pinion N is sufficient for the purpose of locking the resetting key in
position, after it has been slightly turned, and compelling the complete resetting of
the registering wheels before it can be withdrawn, so that the locking co-operation of
the pin O with the circumferential groove in the key is not necessary for this purpose,
although where the pin O and a longitudinal groove P are employed it is necessary
that the circumferential groove be provided, or the shaft of the key above the end of
the groove P be reduced, in order to permit the key to be turned. In event, however,
a pinion N of the same size as the pinion I be employed the flanged disk J may be
dispensed with and the pin and circumferential groove in the key serve the purpose
of compelling the complete resetting movement of the parts.
It will be understood that the ratchet and pawl devices prevent backward
movement of the parts, after the key has been inserted and turned forward from
normal position, so that after it has been thus turned it cannot be withdrawn by
turning it backward.
For the purpose of positively locking the shaft B in normal position, (in addition
to its being yieldingly held in said position by the engagement of the arm E with
the notch in the disk D, Figure 3) there is pivoted in a vertical recess in the lower
end of the housing L a locking arm Q, Figure 4, whose left hand end is pressed

page_text: upward by a spring R and normally fits in a notch b in the lower side of the flange
of the disk J, Figures 2 and 4. The engagement of the arm Q with the notch b
serves to positively lock the shaft B in normal position. When the key M is
inserted in the housing L its lower end bears upon the arm Q and presses its left
hand end downward out of engagement with the notch b, thus releasing the shaft B4
and parts fast upon it and permitting them to be turned by the key. When they
have been given a complete revolution and the key is withdrawn the spring k
re-engages the locking arm Q with the notch b.
So far as the locking and releasing operation of the arm Q which has been
described is concerned the upper edge of said arm may be simply a plain horizontal i
surface, the left hand end of the arm being suitably cut away or shaped to co-operate
in the manner described with the notch b in the flange J. In that event, however,
it will be understood that the arm Q might be readily disengaged from the notch b
by inserting any instrument in the bore in the housing L and pressing the arm Q
downward, in which event the resetting devices might be unlocked and the
registering wheels be partially or wholly reset by the clerk or other unauthorized
person not having possession of the key at all. Furthermore it would be somewhat
difficult to substantially vary the locking devices of different registers so that the
same key would not co-operate with the different locks and unlock others than its
own register. Means are therefore provided for overcoming the first mentioned
difficulty to a very great extent, and also for readily permitting the locking devices
of different registers to be so varied that each register can be unlocked only by the
key belonging to it. To these ends the upper edge of the locking arın Q, as shown
in the drawing, is recessed or cut away beneath the hore of the housing L, and at
the left of such recess the cut-away portion is provided with a hooked projection c,
extending upward toward the left, and having an inclined or beveled right side
with which the periphery of the lower end of the key M engages. Now, when the
arm Q is pressed downward the proper distance to unlock the register its left hand
end will have been carried out of and below the notch B in the flange J, whilst its
projection will not have moved downward far enough to have engaged the notch,
so that as the parts are turned to reset the wheels the edge of the flange J will
travel in the notch beneath the point of the hooked projection c as seen in Fig. 4.
It will be seen that if the cam Q should be pressed downward far enough to engage
the projection with the notch b the parts would remain locked, just as though the
arm had not been depressed at all, and that it is therefore necessary, in order to
. unlock the parts and permit the wheels to be reset, to depress the arm Q exactly
the proper distance, and no further, and it will be found difficult to so operate the
locking device with anything else than the particular key belonging to it.
Furthermore, it will be seen that if the inclines upon the projections c of the arms Q
of different locks are slightly varied the same key will depress the several arms
different distances, and that likewise if the key be varied slightly in length or in
the diameters of their lower ends different keys will depress the arm Q of a given
lock different distances. Thus, in Fig. 4, if the key M were a trifle longer it will
be seen that it would depress the arm Q so far as to cause the projection c to
engage the notch b and lock the parts, while if it were shorter, or its lower end
slightly reduced in diameter it would not depress the arm Q far enough to disengage
its left hand end from the notch b. Likewise, if the incline of the projection e in
Fig. 4 were substantially varied the particular key M shown in that figure would
not properly co-operate with the arm to release the parts. From the foregoing it
will be understood that by varying the inclines upon the projections c, and also by
varying the lengths of the keys M or the diameters of their lower ends, it is possible
to provide a very large number of different locks, each of which can be manipulated
only by the particular key belonging to it. While, however, this is an advantageous
feature of the invention, the latter is not limited in its broader scope, to this or
any other means for differentiating the locking devices, as will be indicated by the
terms of the claims.
In the absence of the flanged disk J, as where a pinion N of the same size as the

page_text: pinion I is employed and the locking co-operation of the flanged disk with the
pinion N thereby rendered unnecessary, the end of the locking arm Q may
co-operate directly with the pinion I, either with a notch cut in its periphery, or
with the space between two of its adjacent teeth which stand on opposite sides of
the vertical plane of the arm Q when the pinion is in normal position, as will be
readily understood.
From the foregoing description it will be seen that in order to reset the registering
wheels it is only necessary to insert the key M in position and then turn it until the
end of the arm E snaps back into the notch in the disk D. This re-engagement of
the arm with the notch, under the influence of the spring, can be plainly seen, felt,
and heard, so that no careful watching is needed to prevent turning the key too far,
and when the re-engagement takes place the key is always in position to be removed.
Referring now to Figures 1 to 5 on Sheet 3 of the drawings, the remaining
features of the invention may be described as follows:-
The registering wheels A are mounted upon a shaft B journaled in the upper ends
of the opposite side arms of a frame C which frame is pivotally supported at D³ in
the framework of the machine in which the register is located, as heretofore described
in connection with Figure 1. Secured upon the right end of the frame C is a
horseshoe-shaped plate Rs (corresponding to the plate K in Figure 1) whose
rearwardly extending arms carry at their ends the friction rollers F and F which
co-operate with the rotary cams by which the frame C is rocked back and forth at
each operation of the machine to gear and ungear the pinions of the registering
wheels with the oscillating actuating segments thereof, as fully described in the
patent heretofore referred to. The shaft B, upon which the registering wheels A are
mounted, luas fast upon its right hand end a beveled pinion H' which meshes with
a second smaller beveled pinion I' which is fast upon the lower end of a vertical
shaft J journaled in a supporting bracket K' and provided at its upper end with a
thumb-piece I by which it may be turned to rotate the shaft B. Interposed
between the shaft B and the several registering wheels are suitable devices for
causing the shaft when turned in one direction to pick up the wheels at the different
points at which they may be standing and carry them to initial position with it.
In the present instance such means are shown in Figure 3A, where pawls M5
pivoted to the sides of the respective wheels, co-operate with a longitudinal notch
or groove in the shaft B, in the well known manner heretobefore described.
of
Fast upon the left hand end of the shaft B Fig. 34, is a disk N' having in its
periphery a single notch with which co-operates the rearwardly extended end
one of the supporting side arms of a frame P5, composed of its two side arms and an
integral cross-bar or plate connecting their front ends. The frame P is pivotally
supported by its side arms upon a rod Q mounted in the frame C, while a spring R
interposed between the frame C and the under side of the cross-bar of the
frame P', Fig. 3, presses the frame P' upward and the rear end of its arm 05
downward, maintaining the latter in engagement with the periphery of the disk No.
In the norinal position of the parts the rear end of the arm fits in the notch in the
disk N as seen in Figure 34, but when the shaft B is turned in the manner
heretobefore described, to reset the registering wheels, the rear end of the arm O'
is lifted as the notch in the disk No is carried from under it and the frame 1's forced
downward against the resistance of the spring R. After the shaft B has been
turned far enough to carry the notch in the disk N from under the arın 05 the
latter will ride upon the periphery of the disk during the further movement of the
latter, until the notch is again brought beneath the end of the arm, whereupon
the latter will spring into the notch again, and the parts come to rest in norinal
position, as seen in Figure 3.
The construction and operation of the parts above set forth are substantially the
same as those found in the machine which has been referred to, and were old at the
date of the invention, the first feature of which, as before stated, consists in
the provision of means for arresting the parts at the end of the resetting revolution
of the shaft B, and preventing them being carried beyond normal position. It will

page_text: be understood that with nothing more than the parts ahove described it would be
possible to turn the shaft B right on beyond initial position without stopping at
that point, in which event it would be unnecessary to give the parts a further
revolution in order to bring them to initial position. In the absence of the provisions
of the present invention the re-engagement of the arm O' with the notch in the
disk N as well as observation of the position of the numbers upon the registering
wheels, may be relied upon to determine when the parts have reached initial
position, but it has been found advantageous to provide a positive stop for arresting
them at that point and preventing the possibility of movement beyond it, so that
no care in watching the numbers upon the wheels or in noticing the re-engagement
of the arm 05 with the notch in the disk N is required. To this end there is
mounted upon the left hand end of the rod Q' which supports the frame P, Fig. 3
a rearwardly extending locking ann S. This arm is loose upon the end of the fixed
rod Q, but is provided with a stud Ts which projects over the edge of a second
arm formed integral with the frame P and extending downwardly and rearwardly
therefrom for a purpose entirely independent of the present invention and which
need not be here described. So far as the present invention is concerned the arm U
could be dispensed with or be cut off immediately in rear of the stud T, it being
only necessary that the locking arm S be connected in some manner to the arm 05
so as to be moved upward by said arm and permit said arm to move downward
independently of it. A spring V coiled around the rod Q bears at its rear end
against the stud T" on the arm S and at its forward end upon the side arm of the
frane P and serves to press the arm $5 downward and yieldingly hold it in
normal position with the stud T resting against the upper edge of the arm U
Projecting from the side of the disk N slightly below and in rear of the notch
in the disk is a stud W5.
Now, under the construction and arrangements of parts above described, when the
shaft B and disk No are turned to reset the registering wheels, and the notch in the
disk is carried from under the end of the arm 05 and the latter caused to ride
upon the periphery of the disk, as in Figure 44 it will be seen that the locking
arm S is lifted into such position that its rear end stands directly in the path of the
stud W5 upon the disk N. The result is that as the parts reach or slightly pass
initial position the stud W will abut against the rear end of the arm S5, the latter
being slightly rounded out to fit the surface of the stud. At the same instant that
the stud engages the end of the arm S, and the further movement of the parts is
thereby arrested, the upper edge of the notch in the disk No will clear the rear end
of the arın 0 and the latter will spring downward against the lower radial wall of
the notch, with the result that the parts will be arrested in the position shown in
Fig. 5. The engagement of the stud W5 with the end of the arm S5 will prevent
the latter moving downward with the arm 05, with the result that the rear end of
said arm S will be held up in the position shown in Fig. 5 against the pressure of its
spring V which tends to throw it downward. The pressure of the rear end of the
arm upon the lower wall of the notch in the disk, under the action of the
spring R5, will tend to force the disk slightly backward from the position shown in
Fig. 5 and permit the end of the arm to fully engage the notch as seen in Fig. 3.
As soon as the pressure upon the thumb piece L, by which the parts have been
turned forward, is released, the rear end of the arm 05 will be forced downward to
the position shown in Fig. 3A by the action of the spring R upon the frame P³.
This will move the stud W slightly rearward and disengage it from the end of the
arm S and permit the spring V to throw the latter downward to normal position.
From the foregoing description it will be understood that no matter how rapidly
or violently the shaft B is turned in resetting the registering wheels the parts
will be positively arrested when they reach normal position, so that no further
movement is possible without first releasing the pressure upon the thumb piece by
which the shaft has been turned. Any excessive movement of the parts through
mistake or accident is therefore rendered impossible.
The remaining feature of the invention relates to means for locking the transfer

page_text: pawls in normal position and preventing movement of them except by their actuating
cams. In the register shown in Fig. I the transfers between the first and second
and second and third wheels are effected by means of pawls X5 X+ which co-operate
with ratchets upon the hubs of the second and third wheels, said ratchets being
hidden in Fig. 1 by the first and second wheels, but corresponding to the ratchet
of the first wheel shown in Figure-1, (see Figure 2). The transfers between the
third and fourth and the higher wheels in the series are effected, in the present
instance, by transfer devices of familiar construction which do not employ any
actuating pawls, and to which the present invention has no application and which
need not be here described. The transfer pawls X X for the second and third
wheels are pivoted in and carried by the upper ends of long curved levers Y Y
which are fulcruined at. D5 in the frame C and extend horizontally rearward from
their fulcrums and carry upon their rear ends friction rollers + with which
co-operate respectively cams A4 A6 upon a rotary shaft B, Fig. 2. Under this
construction and arrangement of the parts at each revolution of the shaft B+ the
cam A will engage the roller Z upon the rear end of the lever Y and rock said
lever and throw the pawl X+ rearward, while the cam A will immediately thereafter
engage the roller Z of the lever Y and in like manner throw the pawl X rearward.
The two pawls are normally held up, in operative position, by latches X and X,
which latches co-operate with projections Y3 and Y upon the hubs of the first and
second registering wheels, by which at each revolution of either of those wheels
the latch for the pawl of the next higher wheels is tripped and the pawl set to
effect a transfer at its next rearward movement, in the well known manner.
Under the above described construction and arrangement it will be seen that
there is nothing to prevent the levers X and Y being rocked at any time by any
force applied either to them or to the transfer pawls, so that- should said levers be
moved at any time, by accident or design, otherwise than by the cams upon the
shaft B, improper transfers might be effected and the registration falsified. To
prevent this there is provided a locking device for each of the pawl levers, which
locking device normally locks said lever from movement by force applied to it. in any
manner, and permits movement of it only after it has been unlocked or released by
first moving the locking device; and this locking device stands in the path of the
cam co-operating with such lever, so that it is struck by the can and caused to
release the lever immediately before the cain engages the lever to move the latter.
As seen in Fig. 1 the lower end of the frame C is provided with two rearwardly
extending arms CC upon opposite sides of the rear ends of the pawl
levers and Y. Hung upon a rod D supported in these arms and extending across
the upper sides of the levers. Y5 Y, are two locking plates E E, one beside each
of the levers Y Y. Each of these plates has projecting from its side a stud F
which fits in a notch in the edge of the adjacent lever, while springs G coiled
around the hubs of the plates EE and pressing upward at their rear ends against
the lower edges of said plates yieldingly maintain the studs F in engagement with
the notches in the levers.
Under the construction and arrangement above described, if it be attempted to
press the rear end of one of the levers downward the direction of the pressure
thereby exerted upon the stad F of the adjacent locking plate is such, in relation
to the pivotal point of such plate, that the stud will simply bind in the notch of
the lever and the plate will not yield, but on the contrary will firmly lock the rear
end of the lever from downward movement. If however, the locking plate is slightly
depressed and its stud F disengaged from the notch in the lever the rear end of the
latter may be freely depressed, the stud, as the lower edge of the lever contacts with
it, slipping along the under edge of the lever in front of the notch in the latter.
Now, in the revolution of the shaft B' the cam A5 will strike the upper rear corner
of the plate E and depress the latter, and thereby release the lever Y', before it
contacts with the roller Z upon the rear end of the lever and rocks the latter to
throw its pawl X rearward; and likewise the cam A' will contact with the plate E

page_text: and release the lever Y before it reaches the roller Z upon the rear end of said
lever.
From the foregoing description it will be seen that the pawl levers and pawls are
normally locked and cannot be moved by any force applied to them without first
depressing the locking plates E E and disengaging the studs F from the notches
in the under edges of the levers, and that said plates are engaged by the cams upon
the rotary shaft and the levers thereby automatically released preparatory to the
engagement of the cams with the levers for actuating the pawls.
So far as known the present invention is the first in the art to provide a locking
device of any sort for the transfer pawl of a register, which device normally locks
said pawl froin movement and co-operates with the actuating device of such pawl to
automatically release the pawl preparatory to its movement by the actuating device,
and is in this respect of corresponding scope.
Having now particularly described and ascertained the nature of this
invention and in what manner the same is to be performed I declare that what
I claim is :-
1. In a registering device, the combination, with two registering wheels, the lower
provided with a projection and the higher with a ratchet, of a reciprocating transfer
pawl adapted to co-operate with said ratchet, and a latch for normally holding
said pawl out of operative position, said latch co-operating with the projection upon
the lower wheel to be tripped at each revolution of said wheel and perinit the
transfer pawl to move into operative position, and reciprocating back and forth with
the pawl throughout substantially the complete movements of the latter and
maintaining its operative engagement with the pawl except when tripped by
the projection upon the lower wheel, substantially as and for the purpose
described.
2. In a registering device, the combination, with two registering wheels, the
lower provided with a projection as W2, and the higher with a ratchet as L2, of a
reciprocating transfer pawl N adapted to co-operate with the ratchet L. and provided
with a lateral projection S2 and the spring-pressed latch T provided at its upper end
with the shoulder normally engaging the projection S of the pawl and provided
upon its rear side with a projection co-operating with the projection W upon the
lower registering wheel, the adjustament of the parts being such that the upper end
of the latch T, under the influence of its spring, is permitted to follow the pawl N2
in its rearward movement to substantially the limit thereof, with its shoulder
remaining in engagement with the projection S of the pawl except when the
latch is tripped by the projection W on the lower registering wheel, substantially
as and for the purpose described.
3. In a cash register or other device having a part to be acted upon by a cam,
the combination of a rotary shaft, a cam loosely mounted thereon, a coiled spring
surrounding the shaft and secured thereto at one end and acting upon the cam at its
opposite end, and a stop for limiting the movement of the cam under the pressure
of the spring, substantially as and for the purpose described.
4. In a cash register or other device having a part to be acted upon by a cam, the
combination of a rotary shaft as X' a sleeve A³ loosely mounted thereon and provided
with one or more cams, as R, a collar, as B, fast upon the shaft, a coiled spring C
surrounding the shaft and secured at one end to said collar and at its opposite
end to the sleeve A³, and a stop, as D3 for limiting the movement of the
sleeve A under the pressure of the spring C, substantially as and for the purpose
described.
5. In a registering device, the combination of the shaft B, the registering wheels A
mounted thereon, suitable means intermediate the wheels and shaft for causing the
shaft to pick up the wheels and carry them with it when it is turned in one
direction, the pinion I fast upon the shaft, the housing 1. having the bore for the
reception of the key, and the key M. adapted to fit in said bore and having fast
upon it the pinion N alapted to co-operate with the pinion I for the purpose
described.

page_text: 6. In a registering device, the combination of the shaft B the registering wheels A
mounted thereon, suitable means intermediate the wheels and shaft for causing the
shaft to pick up the wheels and carry them with it when it is turned in one direction
the pinion I fast upon the shaft, the projecting flange J surrounding said pinion and
having the notch or recess , the housing L having the hore for the reception of the
key, and the key M adapted to fit in said bore and having fast upon it the
pinion N adapted to co-operate with the pinion I and flange J in the manner.
described.
7. In a registering device, the combination of the shaft B, the registering wheels A
mounted thereon, suitable means interinediate the wheels and shaft for causing the
shaft to pick up the wheels and carry them with it when it is turned in one direction
the pinion I fast upon the shaft, the housing I. having the bore for the reception of the
key, the pin O projecting into said bore, and the key M adapted to fit in said bore
and provided with the longitudinal and circunferential grooves co-operating with
the pin O, and having fast upon it the pinion N adapted to mesh with the pinion I,
substantially as described.
8. In a registering device, the combination of the shaft B, the registering wheels A,
mounted thereon, suitable means intermediate the wheels and shaft for causing
the shaft to pick up the wheels and carry them with it when it is turned
in one direction the pinion I fast upon the shaft, the housing L having the
bore for the reception of the key, the locking arin Q spring-pressed into locking
co-operation with the pinion I, and the key M adapted to fit in the bore in
the housing L and to co-operate with the locking arm Q, and having fast upon it the
pinion N adapted to mesh with the pinion I, substantially as described.
9. In a registering device, the combination of the shaft B, the registering wheels A
mounted thereon, suitable neaus intermediate the wheels and shaft for causing the
shaft to pick up the wheels and carry them with it when it is turned in one direction,
the pinion I fast upon the shaft, the housing L having the bore for the reception of
the key, the pin O projecting into said bore the spring-pressed locking arm Q
co-operating with the pinion I the key M adapted to fit in the bore in the housing L
and co-operate with the arm Q and provided with the longitudinal and circumferential
grooves co-operating with the pin 0, and the pinion N fast upon the key M and
adapted to mesh with the pinion I, substantially as described.
10. In a registering device, the combination of the shaft B, the registering wheels A
mounted thereon, suitable means intermediate the wheels and shaft for causing
the shaft to pick up the wheels and carry them with it when it is turned in one
direction, the pinion I fast upon the shaft, the projecting flange J surrounding the
pinion I and having the notch or recess a, the housing L having the bore for the
reception of the key, the spring-pressed locking arm Q pivoted in said housing and
co-operating with the notch b in the flange J, and the key M adapted to fit in the
bore in the housing and co-operate with the arm Q, and having fast upon it the
pinion N co-operating with the pinion I and flange J in the manner described.
11. In a registering device, the combination of the shaft B, the registering wheels A
mounted thereon, suitable means intermediate the wheels and shaft for causing the
shaft to pick up the wheels and carry them with it when it is turned in one direction,
the pinion I fast upon the shaft, the projecting flange J surrounding the pinion I
and having the notch or recess a, the housing L having the bore for the reception of
the key, the pin O projecting into said bore, the spring-pressed locking arm Q
pivoted in a recess in the housing at one end of said hore and adapted to co-operate
with the notch ò in the flange J, the key M adapted to fit in the bore in the housing L
and co-operate with the arm Q and provided with the longitudinal and circumferential
grooves co-operating with the pin 0, and the pinion N fast upon the key M and
adapted to co-operate with the pinion and the flange J in the manner
described.
12. In a registering device, the combination of the shaft B, the registering wheels A
mounted thereon, suitable means intermediate the wheels and shaft for causing the
shaft to pick up the wheels and carry them with it when it is turned in one direction,

page_text: the pinion I fast upon the shaft, the projecting Hange J surrounding the pinion I
and having the notches a and b, the housing I, having the bore for the reception of
the key, the spring-pressed locking arm Q pivoted in said housing at the end of the
bore and provided with the projection c adapted to co-operate with the notch bin
the flange J, and the key M adapted to fit in the bore in the housing Land
co-operate with the projection c, and having fast upon it the pinion N
co-operating with the pinion I and flange J, substantially as and for the purpose
described.
13. The herein described detachable resetting key for registers, consisting of the
shank M. adapted to fit in a suitable bore and having the thumb-piece for turning it,
and the pinion N fast upon the shank M near enough its middle to leave a free
projecting end to fit in the bore and adapted to co-operate with a pinion turning with
the resetting shaft, substantially as described.
14. The herein described resetting key' for registers, consisting of the shank M
having the longitudinal and circumferential grooves at one end, adapted to
co-operate with a projection in the bore or guide way in which the key fits, and
having at its other end the thumb-piece for turning it, and the pinion N fast upon
the shank M and adapted to co-operate with a piston turning with the resetting
shaft, substantially as described.
15. In a registering device, the combination, with the resetting shaft for the
registering wheels, of a movable stop co-operating with a projection turning with the
shaft, and means actuated by the shaft but independent of the projection for moving
the stop into the path of the projection after the shaft has been turned from normal
position for the purpose described.
16. In a registering device, the combination, with the resetting shaft for the
registering wheels, of a movable stop co-operating with a projection turning with the
shaft, and ineans actuated by the shaft but independent of the projection for moving
the stop into the path of the projection after the shaft has been turned from normal
position, and permitting it to move out of the path of the projection again after
the latter has engaged it and the parts been arrested by it, for the purpose
described.
17. The combination of a rotatable shaft, a disk fast thereon or turning therewith
and provided with a notch in its periphery a member bearing against the periphery
of the disk and co-operating with the notch therein, and a movable stop adapted to
be moved by said member into the path of a projection turning with the shaft, to
arrest the latter.
18. The combination of a rotatable shaft, a disk fast thereon or turning therewith
and provided with a notch in its periphery and with a lateral projection, a member
bearing against the periphery of the disk and co-operating with the notch therein,
and a movable stop adapted to be moved by said member into the path of the
projection and permitted to move out of the path of the projection after the latter
has engaged it and been arrested by it.
19. The combination of the shaft B, the disk No fast thereon and having the
notch in. its periphery and provided with the projection W5 the spring-pressed
arm bearing against the periphery of the disk and adapted to co-operate with
the notch therein, and the stop arm S co-operating with the arm 05 and with
the projection W for the purpose described.
20. The combination of the shaft B, the disk N' fast thereon and having the notch
in its periphery and provided with the projection W, the spring-pressed arm (³
bearing against the periphery of the disk and co-operating with the notch
therein, the stop arm S co-operating with the arm 05 so as to be moved in one
direction with said arm but not in the other, and the resetting spring V₁ for
the arm S5, substantially as and for the purpose described.
21. The combination of the shaft B, the registering wheels A mounted thereon,
means intermediate the wheels and shaft for causing the latter to pick up the
wheels and carry them with it when turned in one direction, the beveled pinion H³
fast upon one end of the shaft, the beveled pinion I meshing with the pinion H5,

page_text: means for turning the pinion I' to rotate the shaft, the disk No fast upon the
opposite end of the shaft and provided with the notch in its periphery and with
the projection W³, the spring pressed frame 15 having the arm 0' bearing against the
periphery of the disk N³, the stop arm S5, the projection T intermediate the arm S
and the frame P or parts moving with it, for causing the frame to carry the arm S
with it in one direction but not in the other, and the resetting spring Vs for the
arın S, substantially as and for the purpose described.
22. In a registering device, the combination, with a registering wheel provided
with a ratchet, a reciprocating transfer pawl adapted to co-operate with the ratchet,
and actuating means for said pawl, of a locking device norinally holding the pawl
from movement and co-operating with the actuating means to release the pawl
preparatory to its movement by said means.
23. In a registering device, the combination, with a registering wheel provided
with a ratchet, a reciprocating transfer pawl adapted to co-operate therewith, and a
cam for reciprocating said pawl, of a locking device normally holding the pawl from
movement and co-operating with the cam to cause the latter to release the pawl
preparatory to moving it.
24. In a registering device, the combination, with the registering wheel A provided
with the ratchet G, the lever Y, and the transfer pawl X actuated by said lever and
adapted to co-operate with the ratchet G, of the spring-pressed pivoted locking
plate E provided with a projection F co-operating with the notch in the lever ' in
the manner and for the purpose described.
25. In a registering device, the combination, with the registering wheel A provided
with the ratchet G, the lever Y, and the transfer pawl X' pivoted to and carried by
the upper end of said lever and adapted to co-operate with the ratchet G, of the
spring-pressed locking plate E pivoted at D above the rear end of the lever Y
and provided with the projection F co-operating with the notch in the under edge
of said lever, and the cam A' co-operating with the plate E and rear end of the
lever in the manner and for the purpose described.
Dated this 2nd day of November 1896.