Year: 1888

page_text: Date of Application, 7th Sept., 1888
Specification Accepted, 19th Oct., 1888
I JOSEPH YATES of 30 Pimlico Road London S.W. Engineer 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 :-
To enable this invention to be properly understood I will proceed to describe the
same with aid of the accompanying drawings in which
Figure 1, represents face of the apparatus.
Figure 2, partial back view of preceeding figure.
Figure 3 section taken at line X, Y, figure 1.
Figures 4, 5, and 6, enlarged detached views of parts embodied in figure 1.
Ᏼ ;
A, bed or support formed with concentric grooves in which turn rings B, B1, B2, 1
C, concentric divisions of the grooves, the tops being marked with figures; the central
portion denoting farthings and the next respectively pence, shillings and pounds.
The top of each of the rings B, B1, B2, B3, have attached respectively a metal
ring D, D1, D2, D3, formed with pointers E, E1, E2, E³, and stud handles F, F1 F2, F³,
to enable the rings B, B1, B2, B3, to be moved round.
To prevent these rings moving back or turning too freely, pawl springs G, are
attached to their periphery. Attached slightly off the centre and to A, is a bar H,
having underneath pendant studs I, I 12, to actuate pawls J, J, J2, by means of
cams K, K¹ K², on levers L L' L, M, retaining fingers for the ring B³, which
enables the whole of the rings to be held in as the pointers, of each ring D, D¹, D³, D³,
The underside of
slightly overlap the exposed portion of rings B, B1, B2.
rings B, B1, B2, and B³, are numbered to correspond with the numbers on the
top of divisions C; but the farthings ring B has a "0)," in place of "4" and "8,"
and 1, 2, 3, in place of 5, 6, 7. These numbers show through windows N, N¹, N³,
at back which enables the total at any time to be seen by turning over the apparatus
the window N³, showing pounds N2, shillings N¹, pence and N farthings.
The apparatus is worked as follows
N³
At the commencement the pawls J, are arranged to be close to the bar Hon
the left hand side, and the under numbers so that none show through any of the
windows but arranged that the lowest number shall show first on the turning of the
rings B, B1, B2, B3, in the direction of the arrow,

page_text: To record two farthings, the farthings ring B is moved by that stud F opposite
figure 2, up to the bar H. when "2" would show through window N, by moving
this ring a further two divisions will bring 0, in the window N, and cause the
cam K, of lever L, to come against pendant stud I, which will press out one end
of pawl J, causing this end of pawl to engage a pointer E¹, of the next or pence
ring, the length of face of cam K, holding the pawl out sufficiently long to enable
the pence ring to be moved one division, causing "1" to show through, window N¹,
when face of cam K passes stud I, the pawl Jimmediately closes in, on coming
against the next pointer E¹, and will not engage a pointer until again pressed out
and held as has been explained which will not be until the ring B has made half
a revolution, and the face of the second cam K, comes against pendant stud I.
The central division C, is made with eight divisions instead of four as the latter
would make it so small, for this reason, the ring E is fitted with two sets of pawls
and cams.
The other rings B1, B2, only move the next outside ring one division
at each revolution. In recording amounts it is only necessary to move round the
rings by the stud handle opposite the number to be recorded and always moving the
handle up to the bar H.
So far the invention has been described as applied to the addition of £ s. d. but
it will be readily understood that the same can be applied to the addition of numbers.
The central divisions C, being marked for units, and the ring E, being fitted with
only one pawl and cam, the next divisions for tens, the next for hundreds, the next for
thousands, and so on.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, I declare that what 1
claim is
1. A mechanical calculator constructed and operating substantially as described.
2. In a mechanical calculator, the combination of fixed divisions C marked on face
with numerals, movable rings with pointers attached, and handles to move the rings,
as described.
3. In a mechanical calculator, the combination of movable rings fitted with pointers
and suitable handles, of the means for moving the pence, shillings, and pounds, rings
by an inner ring, consisting of the pawls and pivotted levers with cam faces attached
to the movable rings, and the studs I, on bar H, as described.
4. In a mechanical calculator, the combination of fixed divisions C, marked with
numerals on face, movable rings with pointers on top, and marked with numerals
underneath, and windows at back of bed A under the movable rings for the numerals
on latter to show through, as described.
Dated this 7th day of September 1888.
FREDERIC PRINCE,
1, Quality Court, Chancery Lane, W.C.,
Agent for Applicant.