Improvements in Perpetual Calendars.
Year: 1893

page_text: Date of Application, 9th June, 1893
Complete Specification Left, 3rd Apr., 1894-Accepted, 25th May, 1894
PROVISIONAL SPECIFICATION.
Improvements in Perpetual Calendars.
We, EDGAR ALFRED GODDIN of 138 Brooke Road, Stoke Newington in the
County of Middlesex, Engineer and MONTAGUE ATKINSON, of Tarltons, Cambridge
Park, Leytonstone in the County of Essex, Gentleman do hereby declare the nature
of this invention to be as follows:-
--
The improved perpetual calendar consists of a piece of card-board or other
suitable material of any convenient shape provided with a pivotal point near its
upper edge, beneath which are, arranged in rows forming arcs of circles concentric
with said pivotal point, consecutive numbers which represent the dates of the
month.
These rows do not all begin at the same positions in the lines (or rows), those
nearer to the top commencing nearer to the right hand end of said lines, and the
number (date) immediately below the one above it, is always greater than it
by "7" so that if any seven columns be isolated, by covering or otherwise obscuring.
the others, the top row (not necessarily complete) will always begin with "1" and
the second and following ones will always begin with the number next to the last
figure exposed in the preceding line, and the last number in the last line will
always be "31," it will therefore be seen that by exposing different series of seven
contiguous columns the "Ist" (date) may be made to appear in any of the said
columns.
Beneath these rows of numbers is a second series, containing seven columns, these
columns containing the dates of years.
Upon the pivotal point, mentioued above, is placed a second piece of card, or
other suitable material, having the form of a sector of a circle, or other convenient
shape, and provided with a suitable point with which to indicate the year; this
piece is large enough to enclose within its borders all the date-of-the-month
numbers, and is provided with an opening through which are exposed only those
(date-of-the-month numbers) to be used during the year to which the point is set,
this piece only requiring to be set once in the year.
Beneath the opening and on the second piece referred to are arranged in columns,
the months of the year, January and February appearing twice, all those beginning
on the same day of the week being in the same column.
Lastly, a third piece is placed over the others and on the same pivotal point, this
is also in the form of a sector of a circle, or other convenient shape, and is provided
with a point with which to indicate the month.
This part, like the last referred to, has an opening in it, but through which only
seven columns of the date-of-the-month numbers can be seen, and over and below
which (said opening) are indicated the days of the week, thus presenting the
calendar for the month to which the pointers are set.
Instead of pointers we may use openings through which to expose only those
columns containing the month and year to be indicated.
A modified form of the invention consists of two pieces instead of three, the
principal part being similar to the first piece of the calendar just described and the
second and last piece differing from the third (of the calendar just described) in
that, in addition to the days of the week, it has the months indicated upon it in
columns, all these are so arranged that when the column containing the month is
brought in line with that containing the particular year required, the calendar for
that month is exposed through the opening with which this part is provided.

page_text: Beneath each of the columns containing the names of the months I punch a hole
each of which can be made to cover a corresponding hole, situated above each of
the columns containing the dates of years, in the principal part; through these
holes we insert a pin or stud, which serves the double purpose of indicating and
preventing the relative movement of the parts.
This pin or stud we prefer to attach to an arm extending from the pivotal point
and behind the parts referred to, in this case the pin or stud is inserted from
the back.
Dated the 0th dow of June 1893
EDGAR A. GODDIN.
Wm. Brookes & Son,
55 & 56, Chancery Lane, London, Agents for the Applicants.
COMPLETE SPECIFICATION.
Improvements in Perpetual Calendars.
We EDGAR ALFRED GODDIN of 138 Brooke Road, Stoke Newington in the
County of Middlesex, Engineer and MONTAGUE ATKINSON, of Tarltons,
Cambridge Park, Leytonstone in the County of Essex, Gentleman 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 :-
The object of our invention is the simplifying and condensing of perpetual
calendars so that they may easily be set by means of a suitable gauge so as clearly
and correctly to shew the proper monthly weekly or daily calendar without
necessitating reference to an almanac or the use of a formula, such calendar being
adaptable for use inside the covers of pocket books and the like as pocket calendars,
as a date indicator for office or similar use etcetera.
To obtain this result we use a card or its equivalent of rectangular form to which
we pivot preferably near the edge of one of its extremities, one or more other
sector-shaped parts, (but we do not confine ourselves to this shape) any one or
more of the parts of the complete calendar having suitable openings through
which the requisite indications, with which parts are provided, may be seen.
In addition to these parts we may use a stud or its equivalent to prevent the
relative movement of the parts when the calendar is set, this we may attach to
any of the parts described or to an arm or pointer depending from the pivotal
point for the purpose of indicating the year, month or other division of time.
In the accompanying drawings
Fig. 1 is a front view of one form of perpetual calendar.
Fig. 2, is a vertical section of the same taken on the line x-x.
Fig. 3, is a detail of the part B of Fig. 1.
Fig. 4, is a detail of the part C of Fig. 1.
Fig. 5 is a front view of another form of calendar.
Fig. 6 is an edge view of same.
Fig. 7 is a detail of the part C used in Fig. 5.
Fig. 8, is a front view of another form of calendar.
Fig. 9 is a back view of same.
In Fig. 1A represents a rectangular card or its equivalent having a four-sided
opening a formed by two radial lines and parts of the circumference of two
concentric circles provided with a radial slit a³ at its top and a circumferential
slot a², to the back of this are connected the two parts B and C by the pivot D, the
part B shewn separately in Fig. 3 is provided with a series of openings 6 of similar
form to a in the part A but placed at such distances from their common centre that
by the movement of the part B, that part of the card C which lies beneath the
opening a of card A is brought to view part by part by exposing portions of arcs
1

page_text: of successively increased radius, the angular distance between these holes being
such that never more than one complete one is exposed through the opening a at
the same time.
The part C shewn separately in Fig. 4 is of approximately sector shape and
bears a series of figures so arranged that if any seven adjacent radial columns
are separated from the rest, the numbers will always count, from left to right,
1 to 31, and by selecting these seven columns the figure 1 may be made to occupy
any of them.
The indications on the other parts are such that when the part c¹ of the sector C,
that protrudes through the slot a² is moved to the right or left until the column
containing a given year is in line with any given month, the daily calendar will be
found by successively moving the part B by its upper edge b' so as to cause the
opening to move from left to right which movement also causes the name of the
day to appear at a³, when however the year is underlined indicating
a leap year,
the underlined January and February must be used.
The stud e which is attached to the card A and is made to enter one of the
holes prevents the relative movement of the parts controlling the monthly
adjustment.
In Figs. 5, 6 and 7 a simpler form of calendar is illustrated which shews the
complete monthly calendar at once thereby dispensing with the part B, the rule for
adjusting it being the same as before. It will be noticed that the card C in this
form bears 19 vertical columns of numbers instead of 13, which renders it necessary
to repeat only the January and February instead of as in the arrangement shewn
in Fig. 1.
In Figs. 8 and 9, the essential difference is that the dates of years are indicated
on the back of the part A and that it is provided with a pointer E which bears a
stude that enters one of the holes at when the said pointer indicates a given year.
In this case the part c of the sector C is adjusted so that the hole at the base of
the column that contains the desired month, surrounds the stud e, carried by the
pointer E, which protrudes far enough through the card A to be engaged.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we declare that what we
claim is :-
1. The combination arrangement and use of parts of perpetual calendars, so as to
enable the monthly, weekly or daily calendar by means of a gauge to be shewn
correctly and without necessitating reference to an almanac or use of formula, as
set forth and illustrated by the drawings.
2. The combination arrangement and use of parts of perpetual calendars so as to
co-operate substantially as and for the purpose set forth and illustrated with respect
to Figs. 1, 2, 3 and 4 of the drawings.
3. The combination, arrangement and use of parts of perpetual calendars so as to
co-operate substantially as and for the purpose set forth and illustrated with
respect to Figs. 5, 6 and 7 of the drawings.
4. The combination, arrangement and use of parts of perpetual calendars so as to
co-operate substantially as and for the purpose set forth and illustrated with respect
to Figs. 8 and 9 of the drawings.
5. In a perpetual calendar of substantially the character indicated the com-
bination and use of the intermediate part or veiling piece B as and for the purpose
set forth.
Dated the 2nd day of An 1004
WM. BROOKES & SON,
55 & 56, Chancery Lane, London, Agents for the Applicants.