An Improved Adjustable Rotary Screw and Perpetually Usable Calendar.
Year: 1889

page_text: Date of Application, 29th Jan., 1889
-omplete Specification Left, 25th Oct., 1889-Accepted, 30th Nov., 1889
PROVISIONAL SPECIFICATION.
An Improved Adjustable Rotary Screw and Perpetually Usable
Calendar.
JOSEPH GOODMAN 312 St. James Road Old Kent Road, in the County of Surrey
Mechanician do hereby declare the nature of this invention to be as follows:-
The object of my invention is to so construct an instrument whereby on receiving
one simple movement the day and date of the year is brought forth and the month is
indicated on an index and the said movement may be performed by hand or
mechanism and so by annual and periodical adjustment it may be used continually
for all future time.
My invention consists of a flat thread screw preferably a left-handed one which is
formed by a narrow groove on a circular body which may be solid or hollow and for
which any suitable material may be used. The screw may be used in any position
but I prefer using it vertically, one end of the screw is provided with an adjustable
circular Cap which is moveable from the centre and forms the top and is larger in
diameter than the Screw and on the shoulder thus formed are formed a continuous
number of shallow V shaped teeth at an equal distance apart and which number are
the same as divisions on its circumference and above each said tooth and on the top
of the Cap are formed suitable studs on to which motion is given to the instrument.
The circumference of the Cap is divided off into equal parts each part forming a
division by vertical lines drawn thereon and the number of divisions so formed may he
seven but not less as each division is mounted with letters to denote each day of the
week in succession, but it must be understood that the principle of this invention is
so that the said Cap may be so divided off and constructed to contain in the same
way any desireable number of wicks so formed up to fifty each following in
succession.
The circumference of the Screw is equally divided off into the same number of
divisions as the Cap and lines are drawn therefrom throughout its length paralel with
its centre and thus crossing the thread on all its coils or part thereof and so forming
continuously on the thread 365 divisions where the Screw terminates.-Commencing
on the top part of the thread with January 1st each division is mounted with the
date of each day of the month and so on in the same way each day of every following
month of the year in succession and thus the thread contains the dates of the
365 days of the year with the addition of one other date for which a provision is thus
made. The division in which falls the 28th of February also contain the 29th in
following order but the figures so forming these dates are necessarilly of a smaller or
more condensed type for fitting therein thus the Screw and Cap together are fitted
into a case having an open end through which it is inserted, the case thus forming a
stand or base for the whole.-On the shoulder formed in the case by the set off made
to receive the Cap thereon are formed teeth into which the upper ones fit and are
made to rise and fall therein by motion given on to the said studs. Through one side
which is the front side of the Case is made three separate openings in line, the top
one for reading the day on the Cap and the bottom one for the year on the disc and
the middle one for the date and which is a paralel opening from the shoulder
vertically down to the extent of the Screw and is the width of the said divisions
thereon and in which opening an indicator travels.-Between the bottom end of the
case and end of the Screw is fitted a disc or ring which is made to move centrally for
adjustment and on its circumference is mounted the dates of any suitable number of
advancing years in succession and each date as required is brought to the front where
through the said opening in the case it is seen.
Any color may be used for the letters and figures but I prefer black for all dates

page_text: except the 29th February on the Screw and for leap years on the disc which are in
red. The two thus matching in color is to signify the 29th is to be read only when
leap year occurs.
Down one side of the said middle opening in the case 13 distinct lines are carried
at right angles thereto and thus forming 12 divisions each of which are mounted
with letters to denote the months of the year each following in succession from top to
bottom and so forming an index of the 12 months.-In the groove of the screw is
fitted a combined point indicator which is made to extend fully half way round the
screw and is kept flush with the thread except the middle part where it is brought
through the said opening in the Caso and is bent at right angles over on to both with
a working clearance and is formed with a suitable opening therein through which
only the date on the screw is to be read and on one side thereof is formed a point
which stands on to the index.-In adjusting and setting the instrument to work out
the year
the desired day on the Cap is brought to stand directly over the first figure
on the Screw which is No. 1 and both Screw and Cap being tightened together by
means of an ordinary Screw or equivalent are thus brought up to the openings with
the indicator encircling the date No. 1 and its point on the top line of the index and
thus by imparting a push to the left by the finger or equivalent on to one of the said
studs the upper teeth rise out of and over the lower teeth fall into the next ones in
advance and thus hinging the next following date under the indicator and the
following day to its said opening and the point is also carried a degree further on to
the division of the month and thus while thereon indicating that month to be read
and when by every such movement being made each following day and date is
produced and thus on the last day of every month the said point is near to the bottom
line of the division forming the month, and so on in the same way by making the
said movement every 24 hours throughout the year, the days and dates are shewn
and the months indicated. But at the end of February 28th of all leap years it is
necessary to shift the Cap one day forward but the said movement of the Screw must
not be made as an escapement of 24 hours is necessary and as it must be understood
that the following 29th is to be read only on such occurences.
The bottom end of the Screw is formed to take a central bearing for the purpose of
steadiment should it be required. Also connected therewith is a spring if required,
for the purpose of taking off any undue weight which may act on the said teeth.
It may be seen by the principle and construction of this invention that by placing
a Timepiece to stand over the Cap, and that from its workings may easily be obtained
the required motion every 24 hours to act on to the said studs.
Dated this 29th day of January 1889.
COMPLETE SPECIFICATION.
An Improved Adjustable Rotary Screw and Perpetually Usable
Calendar.
I JOSEPH GOODMAN of 312 St. James Road Old Kent Road in the County of
Surrey Mechanician 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 my invention is. to construct an instrument which on receiving one
simple movement brings forth the day and date of the year and indicates the month
on an index. The said movement may be communicated to the instrument by hand
or Mechanism and so by annual and periodical adjustment the instrument may be
used in continuity for all future time.
My invention consists of a flat thread screw preferably a left handed one which is
formed by a narrow groove on a circular body which is hollow and for which any
suitable material may be used, the screw may be used in any position, but I prefer
using it vertically. Figure 1 shews the Screw in a vertical position.

page_text: The upper end of the Screw is provided with an adjustable Circular Cap which is
moveable for adjustment from the centre and is larger in diameter than the Screw,
and on the projection thus formed, are cut a continuous number of V shaped teeth at
an equal distance apart any two of which, as the Screw is rotated, fit into two ▲ shaped
teeth on the shoulder of the index plate hereinafter referred to. The number of the
upper teeth must be seven or a multiple thereof and the circumference of the Cap is
divided into as many divisions for the days of the week as there are upper teeth and
above each said upper tooth and on the top of the Cap are formed suitable studs on
to which motion is given to the instrument. The number of the studs must be the
same as the number of the divisions on the circumference of the Cap.
It must be understood that the principle of this invention is that the said Cap may
be divided off and so constructed as to contain in the same way any desirable number
of weeks up to fifty each week following in succession.
The entire length of the full part of the thread of the Screw is marked off into
365 divisions into each of which divisions is put the date of the day of each and
every month and going once round the circumference of the thread, the divisions on
that particular part must be as many as the divisions on the circumference of the
Cap or the number of V shaped upper teeth. Commencing at the upper end of the
thread with January 1st, each division is mounted with the date of each day of every
month in the year in succession, and thus the thread of the screw contains the dates
of the 365 days of the year with the addition of the 29th February in leap year, for
which provision is thus made: the division in which falls the 28th February. Also
contains the 29th in following order, but the figures forming those dates are
necessarily of a smaller or more condensed type for fitting therein.
In the groove of the Screw is fitted a continued point indicator which is made to
extend fully half way round the Screw and is kept flush with the thread except the
middle part where it is brought through the index plate forming a small square frame
with a working clearance through which the date of the day of the month is seen
and on one side of this frame is made a point which shows the month on the said
index plate.
The Screw is placed on a base of any suitable design either square or round having
a pillar apstanding from the Centre which fits into the Cap of the Screw and so forms
a pivot on which the screw turns. Between the top of the pillar and the Cap is a
small spring (M N figure 1) for the purpose of taking off any undue weight acting
on the teeth. Uprising from the base and in front of the Screw forming the front
of the instrument is the index plate before referred to as in figure 2 A. B. In this
plate are made 8 openings as in figure 2 a. b a small square opening through which
the day of the week is seen c-d a long oblong opening down which the point
indicator ✗-Y travels by the motion of the screw as it is rotated and in which
appear all the dates of the days of the month in succession e. f another square
opening through which the year is seen. On the right of the opening c. d the months
in the year are mounted as in figure 2 G to H. At the base of the pillar forming
the pivot before referred to is fitted a ring or disc which is made to move centrally
for adjustment on the circumference of which are mounted any suitable number of
advancing years in succession so that by moving this ring or disc any year as required
is brought to the opening (e-f fig. 2). This ring or disc is fixed in position by a
small thumb screw P. R as in figure 1. Any colour may be used for the letters and
figures but I prefer black for all dates except the 29th February in leap year on the
Screw and for leap years on the ring or disc which are in red the two thus matching
in colour is to signify the "29th" is to be read only when leap year occurs.
In adjusting and setting the instrument to work out the year the desired day of
the week on the Cap is brought to stand directly over the first figure on the Screw
which is I and both screw and Cap being tightened together by means of an ordinary
thumb screw or its equivalent S. T. fig. I they are thus together brought up to the
openings with the point indicator encircling the date 1 and its point indicating the
month January as in fig. 2. Then by imparting motion from right to left by the finger
or its equivalent on to one of the said studs the upper teeth rise out of and over the

page_text: lower teeth and fall into the next teeth in advance thus causing the next following
date to be encircled by the indicator and the following day to the said opening a. b.
figure 2 while at the same time the point is carried a degree further on the division
of the month and thus still indicating thereon that that month is to be read: and
when by every such movement being made each following day and date is produced
and thus on the last day of every month the said point while still indicating the
month is nearer to the next month which it duly indicates when the 1st day of that
month is encircled by the indicator. Thus by making the said movement every
24 hours throughout the year the days and dates are shewn and the months indicated
but at the end of February 28th of all leap years it is necessary to shift the Cap one
day forward which is done by loosening the thumb screw S. T. but the same move-
ment of the screw must not be made as an escapement of 24 hours is necessary and
it must be understood that the following 29th is to be read only on such occurrences.
Figure 3 is a plan elevation with part of the Cap removed shewing the indicator at
work in the opening c-d in fig. 2 on the front index plate.
Figure 4 shows the manner of moving the upper teeth over the lower ones.
It may be seen by the principle and construction of this invention that the requisite
motion inay easily be imparted to the studs by placing and fitting a time piece over
the top of the instrument so that the studs may be moved by clockwork every
24 hours.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed 1 declare that what I
claim is :-
To have made an adjustable Rotary Screw and perpetually usable Calendar by
means of slight motion added to which the date of the day and the month may
appear in continuity for all future time constructed arranged and operating sub-
stantially as and for the purposes hereinbefore described and shewn on the drawings.
Dated 25th day of October 1889.
JOSEPH GOODMAN.