Year: 1890

page_text: Date of Application, 20th May, 1890-Accepted, 23rd Aug., 1890

page_text: brackets secured to the side frame D¹. It is now evident that if the locking arm f
is swung outwardly about its pivots, the stop e is withdrawn from beneath the cam
lever G and the latter can fall.
To the body of the locking arm is secured a bent rod y, one portion of which is
vertical and the other portion horizontal, the latter portion being arranged to extend
across the path of a vertical drop F, having its lower end bent upwardly to form a
cam surface adapted to engage with the rod g when the drop falls.
The engagement of the rod g by the drop produces an angular movement or
deflection of the horizontal portion thereof, whereby the locking arm is swung
outwardly about its hinges to release the lever G, which then falls from its inherent
weight (see figure 5).
The stop lever b. c, vibrated by the fall of the cam lever G, releases the fan, where-
upon the motor is free to act. A suitable spring stop, as i, is provided for limiting
the downward movement of the lever G, also a spring as for returning the arm f
to its normal position when released from the device F. A spring k holds the arm e
of the stop lever b, c continually in contact with the cam lever G.
The day of the week cylinder A is mounted upon, and can turn about, a horizontal
shaft having bearings in the side frames D, D, and one head of said cylinder is
provided with a series of notches or openings m, one for each side of the cylinder
(figures 3 and 4) arranged concentric with the shaft. 7. These notches are successively
engaged to rotate the cylinder by a pawl n carried by an arm o rigidly mounted
upon the projecting end of the shaft of the cylinder A. The outer end of the
armo is connected by means of a rod p with a spring pressed lever H, the down-
wardly projecting arm 7 of which, engages with the teeth of the day wheel 1, and is
vibrated by the rotation of the same. The opposite end of the shaft of cylinder A
is provided with a downwardly projecting finger which is adapted to engage with
the vertical arm h of the cam lever G.
The operation of the calendar in advancing the cylinder A through one seventh of
a revolution each day is as follows:-
The cam lever G having been released and caused the stop lever be to release the
motor, the latter rotates the day wheel in the direction of arrow 1, figure 3, and tho
corresponding tooth of said wheel engages the lever H, to turn the same, thereby
causing the pawl n to advance the cylinder A, through one seventh of a revolution
in the direction of arrow 2, figure 3. On the completion of this portion of a
revolution, the lever H is released from the tooth and falls back against the next
succeeding tooth, or to its normal position, thereby drawing the pawl n backward and
into the proper position to engage with the next succeeding notch or opening m.
In the rotation of the shaft in the direction of arrow 2, figure 3, the finger » on
the end of the same is turned to the position shown in figure 5. During tho move-
ment of the finger to this latter position, it necessarily must, engage with the arm
of the lever and in so doing turns the latter about its pivot d.
The elastic or spring stopi permits such a movement of the lever G, and then
returns the same to the position shown in figure 5. During the retrograde movement
of the lever H, the finger again engages with the cam lever G from the opposite
side (see figure 5) and returns it to its normal position (figure 2), thereby arresting
the movement of the motor.
""
A suitable spring lock ass is provided which snaps into the respective opening or
notch m as it is brought in line with said lock, which prevents the position of the
cylinder A from being disturbed by the retrograde movement of the pawl n. It is
evident that the notches or openings m in the head of the cylinder could be replaced
by projections, to the same end.
The month cylinder B is arranged to turn about bearings in the side frames D D',
and in order that the same can be readily inserted or removed, I provide one head of
the same with a journal t which fits into a bearing u in the side frame D₁ (figure 1)
and the other head with a hub having. a bearing into which extends the end of a
stud w having a threaded portion passing through the side frame 1). One head of the
cylinder B (figure 5) as in the case of the cylinder A, is provided with a concentric

page_text: series of notches or openings m², one for each month, which notches or openings are
successively engaged by a pawl n' carried by an arm of pivotied to the frame D. The
arm is connected by means of a rod pl with a spring pressed lever H engaged by a
cam secured to the hub of the day wheel I and participating in the rotation
thereof. At the end of each month tho noso q' of the cam is brought into a position
opposite a notch in the lever II' so that the latter and the rod gradually move
upward in the direction of arrow 3 whereby the pawl is caused to advance the
cylinder B through one twelfth of a revolution in the direction of arrow 4, figure 4.
A suitable spring lock is provided to prevent retrograde motion of the cylinder as
the pawl is gradually drawn back to its normal position by the cam P.
The device C for displaying the cards which give the day of the month, consists of
sixteen cards d¹, d, &c., and each card has a date upon each side, with the exception of
one. Each card shows one side and the other alternately as it is brought to the front.
Thus there being sixteen cards, the card having 1 on one side has 17 upon the other,
that having 2 on one side has 18 on the other and so on, each card being reversed as
it passes around the shaft or axis a' which carries it. The shaft or axis a' has two
dises arranged thereon at the proper distance apart. These discs have each
sixteen holes, through which are passed the wires c' c' the ends of the latter being
turned outward at right angles and then turned inward to form pivots upon which
the cards are suspended at their centres. The front card d' is brought against
a flat stop into a vertical position and is held by a stop el engaging with the
respective wire. At each release of the motor E a new card is brought against the
stop by the rotation of the shaft or axis a¹.
To cause the cards to move smoothly and regularly I make use of the guide J for the
same (see figures 1,7 and 8) which is best made in the form of an approximately semi-
circular plate or shell having its rim in engagement with the horizontal portions of
the wires ce carrying the cards. The rim of the plate J is so formed as to
positively guide the wires. The plate may be held rigid by any suitable, in the
drawings I have shown it provided with a hob, through which the shaft a passes
while it is held stationary by an adjustable arm g' attached to the side frame D,
figure 1.
It now remains to describe the means for providing for the varying days of the
month, and the manner in which the extra day of February in leap year is indicated.
The day wheel I has upon its periphery thirty one teeth and one blank, the use of
the blank being necessitated by the fact that the sixteen cards d' d' used in the device
for indicating the day of the month, would present thirty-two sides, consequently this
side must be passed by every month. The day wheel is mounted upon an arbor '
and connected with the shaft a' by gear wheels, the shaft a' being connected with
the great wheel E2 of the motor by a gear wheel ¹.
The month wheel K, is mounted upon the day wheel I and eccentric with respect
to the arbor of the same. It consists of two plates rigidly united or of one plate
turned to have a stop-like periphery. The outer plate is provided with twelve
peripheral notches arranged equidistant apart. The inner plate is provided with
recesses corresponding to the teeth of the day wheel I, and with blank portions all
numbered from 1 to 12 the recesses representing the months having thirty-one days,
and the blanks those having but thirty days. The month wheel is so arranged that
its periphery is tangent with that of the day wheel, just above the blank of the latter,
consequently it will be readily understood that when one of the recesses in the month
wheel is directly opposite the corresponding tooth of the day wheel thirty-one days
will be indicated by the device dis; laying the cards; if however, one of the blanks of
the month wheel is brought opposite the tooth of the day wheel, but thirty days will
be indicated since such tooth will be virtually bridged over, , and the lever H rides over
a space corresponding to two teeth.
On the bridge or supplementary portion 13 of the frame D is secured a pawl m²,
which is bent inwardly to engage at certain intervals with the notches of the
month wheel. Once every month as the month wheel revolves about the arbor, it
comes into a position where the pawl m² will engage with a notch, thereby

page_text: advancing the month wheel through one-twelfth of a rotation about its pivot. In
figure 3, I have shown the month wheel in a position where it has just been turned by
the pawl. A suitable spring detent n² engaging with the notches of the month wheel
prevents it from being inadvertently moved.
The month wheel thus provides for the varying days of all the months with the
exception of February for which latter I provide as follows:-
Near the periphery of the day wheel I are located two moveable teeth I and M.
which are preferably arranged to swing about a common pivot o² and when in
coincidence with the periphery of the day wheel they bridge over two successive teeth
of the same, said teeth being those next following the blank space of said day
wheel. When in this position the month will have but twenty-eight days corre-
sponding to February for three years, but when only the tooth L is coincident with
the periphery of the day wheel the month will have twenty nine days corresponding
to February for leap year. The teeth are arranged one above the other, and to hold
either one or both of the same coincident with the periphery of the day wheel I make
use of the following means:
On the month wheel K is eccentrically mounted to turn about a central pivot o³, a
small wheel N which engages with a pin or stop P passing through the month wheel K,
and having suitable guidance therein (see figure 11) especially. The periphery of the
wheel N is provided with a raised portion or cam surface 2 and whenever said surface
is opposite the pin or stop P the latter is drawn outward to such a position that one of
the teeth L M is retained thereby in its outer position while the other tooth can fall
inward. The wheel N is turned through a quarter of a revolution each year by a
pawl secured rigidly to the day wheel and adapted to engage with pins 2 on
tho said wheel. For three years consequently the pin or stop P is held depressed
and both teeth L M are held in their outer positions, corresponding to February
of the three years, but in the fourth year the pin is elevated to permit one tooth
to pass, corresponding to February in leap year.
It will bo observed that in the month of February in each year the pin or stop P is
opposite the teeth LM and is adapted to engage one or both of the same. In the
remaining months of the year the pin or stop is out of the range of the said teeth
and consequently both teeth can fall inward.
The side frames D, D', D', D³ aro provided with suitable brackets as s² for fastening
the same to the case, the whole being so constructed that the calendar can be
completely set up, before its insertion into the case.
I will now describe the clock which is used to release the calendar mechanism once
each day and how it effects such release.
Referring to Figures 12 and 13, A' is the scapo wheel of the clock movement
mounted upon an arbor B₁ arranged in line with and having bearings at one end
in a post and at its opposite end in the frame of the clock movement. F¹ is
an equalizing spring which consists of a hair spring having its inner end secured
to the arbor B and its outer end to the winding arm G' which can turn about the
post C¹. The spring F' is at the outset placed under a definite tension. At the ends
of the winding arm are stops 1 and 2, which are successively engaged by a stop 3 on
the end of an arm J' secured to a rock shaft K. On the arbor B is an eccentric 4,
which engages an arın L' on the rock shaft K'. The gears constituting the clock
movement are connected with a pinion M' on the winding arm. The scape wheel A¹
is engaged as usual by an anchor N connected with the pendulum O¹. While the
stop 3 engages either one of the stops 1, 2, the train of wheels is held out of
action while the spring F actuates the scape wheel, but when the stop is released the
train is actuated by the main spring to advance the hands m³ and n³ of the
clock. As here shown, the hands are moved through a space corresponding to a
half minute on the dial at each release of the motor.
In order that the drop F may release the calendar mechanism once each day, a
cam R is fixed on the arbor of the hour hand; a slot in the drop fits upon the cam
at the point g* and behind the shoulder g³ which holds the drop in position. The cam
has its side recessed at R', but the edge and the central cam shaped part R² are

page_text: slightly raised. The drop F has a projection, which when in place, as shown, rests
upon and slides over the edge of R. Pivotted between the raised portion 12 and the
recessed portion R is a small piece or trap g', which normally stands in the position
shown in figures 14, 16, and 17, but which is turned to the position shown in figure 15,
when the drop has reached the position there shown.
If
In figure 14, the cam is shown after has just dropped and is ready to begin to
move forward for a second operation. In figure 15 the cam has revolved once.
we suppose the arbor to be moving in the direction indicated by the arrow, the cam R
which turns freely within the slot in F, gradually carries F from the position shown
in figuro 14, up into the position shown in figures 15 and 16, that is, the small
projection, as it rests upon the edge of the raised portion R, gradually lifts F, and
just before it reaches the position shown in figure 1, the projection strikes the
curved edge of g and turns it into the position shown in figure 15. This allows the
projection to ride across the open space and reach the outer edge of R. The
continued revolution of the cam then gradually lifts F until it has reached the position
shown in figure 16. As soon as has bridged the space g³ and rests upon the rim
of R, the trap g falls back into its place as shown in figure 17, thus leaving the
space open, and when the parts are in the position shown in figure 16, a little
further movement carries the projection f³ beyond the rim of R, and Finstantly drops
to the position shown in figure 14.
It is thus seen that once in every 24 hours, the drop F falls, and causes the release
of the calendar mechanism.
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 a calendar, the combination of a motor, a positive stop for holding the motor
out of action, a lever engaging with said stop, a locking device for the same, and means
for actuating the locking device to release the lever, substantially as described.
2. In a calendar, the combination of a motor, a stop for holding the motor out of
action, a gravitating cam lever engaging with said stop, a hinged locking arm for
holding the cam lever in an elevated position, and means for turning the locking arm
about its hinge to release the cam lever, substantially as described.
3. In a calendar, the combination of a motor, a lever positively engaging with the
motor to hold the same out of action, a lever engaging with the stop lever, a hinged
locking arm for holding the cam lever in an elevated position, a rod projecting
from the said locking arm, and means for vibrating the same,. substantially as
described.
4. The combination with the motor, the day wheel, and the day of the week cylinder,
mounted loosely upon its shaft, of a stop for holding the motor out of action, a lever
engaging with said stop, a lock for said lever, a releasing device, a pawl bearing arm
secured to the shaft of the cylinder and engaging with the cylinder, a lever engaging
with the day wheel and connected with the pawl bearing arm, and a finger on the shaft
adapted to engage with the lever G, substantially as described.
5. The combination with the ro'ary cylinder A, of a pawl bearing arm engaging
with said cylinder as described, a toothed wheel 1, and a lever engaging with the latter,
and connected with the pawl bearing arm, whereby the said wheel actuates the
cylinder during its rotation to gradually turn the same, substantially as described.
6. In a calendar, a cylinder having one head provided with a series of openings or
notches, and a spring pawl adapted to engage the same to rotate the cylinder, in
combination with a lock engaging the openings, substantially as described.
7. In a calendar, a day wheel, and a month wheel eccentrically mounted with
respect to the former, and a stationary pawl engaging with the month wheel, sub-
stantially as described.
8. In a calendar, a day wheel, a month wheel eccentrically mounted upon the day
wheel and provided with toothed and notched peripheries, and a stationary pawl
engaging the notched periphery, substantially as described.

page_text: 9. In a calendar, a day wheel, a month wheel eccentrically mounted upon the
former, and provided with teeth and notches as described, a stationary pawl engaging
with the notches, and a detent carried by the day wheel and engaging the month
wheel, substantially as described.
10. The combination with the rotary day wheel and the month wheel carried
thereby, of a stationary pawl engaging the month wheel, a cam actuating the month
cylinder through suitable mechanism, and a lever engaging the teeth of the day
wheel and actuating the day cylinder through suitable mechanism, substantially as
described.
11. In a calendar, the toothed day wheel, moveable teeth located near the periphery
of the same, and a device for holding said teeth rigid at certain intervals, substantially
as described.
12. In a calendar, the combination of the day wheel, the moveable teeth located
near the periphery of the same, and a stop actuated periodically to retain one
or both teeth coincident with the teeth of the day wheel, substantially as described.
13. In a calendar, the combination of the day wheel, the moveable teeth L. M,
the stop P', and the wheel N engaging with the stop and actuating the same, and means
for rotating the wheel, substantially as described.
14. In a calendar, the combination of the day wheel, the pivotted teeth L. M, the
stop P, and the wheel N, all combined and operating substantially as described.
15. In a calendar, the combination of the day wheel, the month wheel, the movable
teeth L. M, the stop P, carried by the month wheel, the February wheel mounted on
the month wheel and engaging the stop and provided with a raised portion, and means.
for rotating the said wheel, substantially as described.
16. The teeth L M arranged upon the day wheel coincident with two consecutive
teeth thereof, and adapted to bridge over said teeth at determined intervals, sub-
stantially as described.
17. In combination with the card displaying device C, a rim engaging and guiding
the wires or arms, substantially as described.
18. A shaft, a series of cards or plates, arms carried by said shaft to which the
cards or plates are pivotted, a guide for the arms, and means for revolving the shaft,
substantially as described.
19. A shaft, a series of cards or plates, armis carried by said shaft to which the cards
or piates are pivotted, a stationary guide for the arms, and means for revolving the
shaft, substantially as described.
20. The cylinder B provided at one end with a bearing in the side frame D, and at
its opposite end with the internal bearing a, in combination with the stud w, passing
through the side frames and entering said bearing to support the cylinder at this latter
end, substantially as described.
21. In a calendar, the combination of the pivottel lever G, the elastic stop i for the
same, and the finger engaging the lever, substantially as and for the purpose set forth.
22. In a calendar, a day wheel, a month wheel eccentrically mounted with respect
to the day wheel, and means for imparting an intermittent rotary motion to the
month wheel about its own axis, substantially as described.
parts
R¹
23. The combination with the volute cam track or surface formed by the
and R2, and having a break or opening 96 between them, of the pivotted trap g*
bridging said break, substantially as and for the purpose set forth.
24. A cam consisting of the piece R, having the volute shaped part R' and the
volute rim, the piece g pivotted as shown to connect R' and the rim, and the drop F,
substantially as and for the purpose set forth.
25. A clock substantially as described, combined with and operating a calendar.
HENRY SMITH PRENTISS.
By Harris & Mills,
23, Southampton Buildings, London, Agents.