Year: 1886

page_text: I WILLIAM ALMOND LEVER of 47 Cannon Street, Manchester, in the County of
Lancaster Printer and Stationer, do hereby declare the nature of my invention
to be as follows:-
--
The object of this invention is the production of a calendar which, set right at
the beginning of each month shall correctly indicate the day of the week and its
corresponding day of the month throughout tirat month by one movement or change
only, thereby removing the prevailing liability to error in existing perpetual
calendars through the change of the day of the week and the day of the month
being effected separately and by at least two changes.
In carrying out my invention according to one modification I arrange a sliding
index or marker pointing to the days of the week and month arranged in line in
numerals and letters parallel to each other; by preference on either side of the
sliding pointer. One of the said lines say the days of the week, is so arranged to
slide so as to be easily adjustable and set so that the first of the month may be
opposite to the day of the week on which such month commences, and thus I am
enabled by the daily movement of one index only to correctly indicate the day of
the week and its corresponding day of month throughout the entire month.
According to another modification I arrange the day of the week and day of
the month each on a circular card or disc of suitable material mounted concen-
trically and capable of sliding over each other for the purpose of adjustment at
the commencement of each month. The index in this case is stationary and
I prefer shall be a hole in a card or plate behind which the two concentric cards or
discs revolve. The two cards or discs in this modification are connected with each
other by a friction button or clip so that they travel together for the daily change
of date and thus give a correct reading of the day of week and day of month by
one movement or change only.

page_text: I WILLIAM ALMOND LEVER of 47 Cannon Street, Manchester, in the County of
Lancaster, Printer and Stationer, do hereby declare the nature of my 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 this invention is the production of a calendar which, set right at
the beginning of each month shall correctly indicate the day of the week and its
corresponding day of the month throughout that month by one movement or change
only thereby removing the prevailing liability to error in existing perpetual
calendars through the change of the day of the week and the day of the month
being effected separately and by at least two changes as heretofore.
In carrying out my invention according to one modification and as illustrated on
the accompanying drawing by front view Fig. 1. and side sectional view Fig. 2.
I arrange a sliding index or marker a. for pointing to the days of the week and
month arranged in line in numerals and letters parallel to each other by preference
on either side of the sliding pointer a. as illustrated and marked b. and c. respec-
tively. One of the said lines for instance the days of the week marked 6. is
arranged to slide in the groove d. and behind the orifice e. so as to be easily adjust-
able and set so that the first of the month may be brought opposite to the day
of the week on which such month commences and thus I am enabled, by the daily
movement of one index only, to correctly indicate the day of the week and its
corresponding day of month throughout the entire month.
According to another modification I arrange the day of the week and day of the
month each on a circular card or disc of suitable material as illustrated separately
on the accompanying drawing by Figs. 3. and 5. respectively which discs are
mounted concentrically and capable of sliding over each other for the purpose of
adjustment at the commencement of each month. The index in this case is
stationary and I prefer shall be a hole or orifices L. and m. formed in a card or plate
(see front view Fig. 5. and side sectional view Fig. 6.) behind which the two con-
centric cards or discs marked f. and g. revolve. The two cards or discs f. and g. in
this modification are connected or in frictional contact with each other by a friction
button or clip h. consisting of a pair of spring plates i. mounted on the spindle j.
so that they may be revolved with such spindle and travel together for the daily
change of date and thus give a correct reading of the day of week and day of
month by one movement or change only.
In both the foregoing modifications the name of the month is capable of being
changed as usual in the case of Fig. 1. by a sliding card and in the case of Fig. 5.
by a revolving disc p. as seen separately in Fig. 7. but these form no part of the
present invention.
1

page_text: These improved perpetual calendars may be constructed wholly or in part of
card-board, sheet-metal or other suitable material.
Having thus particularly described and ascertained the nature of my inven-
tion and in what manner the same is to be performed I declare that what
I claim is :-
The improvements in perpetual calendars substantially as hereinbefore described.
JOHN G. WILSON,
Agent for the Applicant.