Improvements in and relating to Adding Apparatus, more especially designed for use with Pencils.
Year: 1892

page_text: COMPLETE SPECIFICATION.
Improvements in and relating to Adding Apparatus, more especially
designed for use with Pencils.
I, CHARLES DAVID JUDD, a citizen of the United States of America, residing
at No. 592 Main Street, in the City of Bridgeport, County of Fairfield and
State of Connecticut, one of the United States of America, do hereby declare
the nature of this invention, and in what manner the same is to be performed, to be
particularly described and ascertained in and by the following statement :-
My invention relates to certain new and useful improvements in registering
devices such as are commonly used for adding units consecutively, but my invention
particularly relates to adding attachments for lead pencils and the like, and has for
its object to provide a device of this description which shall be simple, effective,
and not likely to get out of order.
With these ends in view my invention consists in certain details of construction
and combination of parts such as will be fully hereinafter set forth, and then
specifically be designated by the claims.
In the accompanying drawings-
Figure 1 is an elevation of my improvement attached to a lead pencil ;
Figure 2 a broken sectional elevation ;
Figure 3 a broken elevation with the casing removed;
Figure 4 a detail perspective of the unit registering collar;
Figure 5 a detail perspective of the socket and depresser-pin in proper relative
position;
Figure 6 a detail perspective showing the three registering collars assembled in
proper relative position necessary to their simultaneous turning by the pawl.
Similar numbers denote like parts in the several figures of the drawing.
I have shown, and I will hereinafter describe my invention as embodied in the
form of an adding pencil, but I do not wish to be limited in this respect, since
it is obvious that the broad feature of my invention may be utilized in the
construction of various other devices, such as register locks, adding machines, and
the like.
1, is the casing, and 2 a ring snugly fitting within said casing. 3 is a socket
whose lower end fits closely within said ring, and 4 a pin extending through the
casing, ring and socket, to secure said parts rigidly together. 5, 6, 7, are the
registering collars, the collar 5 being journaled loosely around the socket 3, and
having an elongated hub 8 around which is loosely journaled the collar 6, while the
latter has a hub 9, around which the collar 7 is journaled. These collars all turn
freely and independently.
The collar 7 extends slightly beyond the hub 9, while the latter extends slightly
beyond the hub 8, while in the ends of said collar 7, hub 9, and hub 8, are ratchet
teeth 10, 11 and 12, respectively.
The collar 7 has a master-tooth 13, which is cut down to the depth of the teeth 12
on the hub 8, while the hub 9 also has a master tooth 14 cut down to a similar
depth, so that it will be readily understood that when said master-teeth coincide, as
seen at Figure 6, a pawl engaging therewith will effect the turning of all throe
collars simultaneously. It will also be clear that when the teeth, other than the
master-tooth, on the collar 7, are engaged by a pawl, said collar will be turned
separately, but when said master-tooth is engaged by the pawl at any time other
than that at which such tooth is in coincidence with the master-tooth 14 in the
hub 9, the collars 6, 7, will be turned simultaneously, while the collar 5 will remain
stationary.

page_text: Each of the collars 5, 6, 7, has on its face the numerals 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,
each set of numerals denoting, respectively, hundred, tens, and units.
15 is a thimble loosely placed around the upper end of the socket 3, and 16 is a
spring pawl secured to said thimble and adapted to engage with the teeth on
the collars, as shown at Figure 3. Rigid on socket 3 is a collet 30 which supports
the thimble.
17 is a coil-spring within the socket, and 18 the depresser-pin which enters the
upper end of the socket and bears against said spring, the function of the latter
being merely to return the pin to normal position. Within the upper end of the
socket and extending longitudinally thereof is a straight slot 19, and within the
side of the thimble 15 is a spirally disposed slot 20. Projecting laterally from
the pin 18 through these slots 19, 20, is a lug 21, the object of the slot 19 being to
prevent any axial rotation of the pin, so that when the latter is operated the
thimble will be turned, thereby causing the pawl to perform its functions in
connection with the teeth on the collars.
22, 23, 24, are similar springs secured respectively to the collars 5, 6, 7, and
bearing against the casing 1, with a friction great enough to afford a detent to
prevent any rotation of the collars on the recovery of the pawl, and sufficient to
overcome any friction between the hubs and collars so that there can be no turning
of the latter except by the positive action of the pawl.
Any ornamental tip 25, may be secured to the outer end of the depresser-pin.
I provide openings 26, 27, 28, in the casing through which register the hundreds,
tens and units, respectively. A lead pencil 29, or other analogous article is inserted
within the lower end of the casing.
The teeth on the hubs 8, 9, and collar 7, are of course in each instance ten in
number, and consecutive numbering by the continued operation of the pawl is too
obvious to require further explanation.
I do not lay any claim to the broad feature of an adding attachment to a lead
pencil, for I am aware that such devices have been known heretofore, but
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
1. In an adding attachment for pencils and the like, the combination of the
socket 3, having straight slot 19, the collar 5 having elongated hub 8 loose on said
socket, the collar 6 having hub 9 loose on the hub 8, the collar 7 loose on the hub 9,
said collar 7, hub 9 and hub 8 extending in advance of each other respectively and
provided with ratchet teeth, and the collar 7 and hub 9 having each a master tooth,
which is cut down to the depth of the teeth on the hub 8, the casing 1,
springs 22, 23, 24, thimble 15 having spiral slot 20 and carrying the pawl 16 and
free to turn on said socket, pin 18, having lug 21 extending through said slots, and
spring 17, substantially as set forth.
2. The combination of the socket having therein a straight slot, the spring
and depresser-pin in said socket, the thimble loose around the socket and having
a spiral slot, the pawl carried by the thimble, the lug extending from the pin
through said slots, the collars assembled and having numbers and teeth as
described, the casing to which the socket is secured, and the friction springe
which extend separately from the collars against the casing, substantially as shown
and described.
3. A telescoping series of collars loosely mounted on said socket and capable
each of independent rotation, the ends of said collars being graduated and provided
with ratchet teeth adapted to be engaged by said pawl, while all the collars except
the one most remote from the pawl are each provided with a master-tooth which is
cut to the depth of the teeth in such remote collar, in combination with the casing
surrounding aforesaid parts, and the springs which extend from said collars against
the casing, substantially as set forth.
4. The combination of the telescoping series of collars having numerals on their

page_text: faces and supported and adapted to revolve independently around a common axis,
the ends of the collars being graduated and provided with ratchet teeth, a pawĺ
engaging said teeth to revolve the collars, all of the latter except the one most
remote from said pawl having each a master-tooth which is cut to the depth of the
teeth in such remote collar, means for actuating said pawl, and frictional devices for
preventing the turning of said collars except by the positive action of the pawl,
substantially as set forth.
Dated this Twentieth day of December AD 1899
JENSEN & SON,
77, Chancery Lane, London, W.C., Patent Agents.