US1557189A - Clock mechanism - Google Patents

Description

S. A. PAVKY CLOCK MECHANISM Filed Aug. 1, 1924 4 Sheets-Sheet 1 him-M 5. A. PAVKY CLOCK MECHANISM Filed Aug. 1, 1924 4 Sheets-Sheet 2 S. A. PAVKY CLOCK MECHANISI Filed Aug. 1, 1924 4 Sheets-Sheet 5 INVENTOR- Oct. 13, 5. A. PAVKY CLOCK MECHANISM 4 Sheets-Sheet 4 Filed Aug. 1, 1924 INVENTOR Patented Oct. 13, 1925. 3

UNITED STATES PATENT OFFICE.

CLOCK MECHANISM.

Application filed August 1, 1924. Serial No. 729,474.

1 '0 all whom it may concern:

Be it known that I, STEPHEN A. PAVKY, a citizen of the United States, residing at Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented new and useful Improvements in a Clock Mechanism, of which the following is a specification.

My invention relates to new and useful improvements in a clock mechanism, and has for its primary object the simplification of such a mechanism where used in actuating a striker and chimes as well as being self adjusting in order that the parts will be synchronized at a certain time so that the pro er chimes will be played and the proper stri *es be made at their regular times.

Another object of the invention is to provide cooperating snails for controlling the chimes and striker in combination with mechanism of unique desi n for determining the number of chimes to played and the number of strikes to be made. A further object of the invention is to provide a new and im roved controlling device for starting an stopping the sound producing devices.

A still further object of this invention is to provide an arcuate rack and its component parts in combination with a pair of snails and associated elements for controlling the chime and striker mechanism.

With these ends in view, this invention consists in the details of construction and combination of elements hereinafter set forth and then specifically designated by the claims.

In order that those skilled in the art to which this invention appertains, may understand how to make and use the same, I will describe its construction in detail, referring by numerals to the accompanying drawings forming a part of this application, in which Fig. 1, is a plan view of a clock mechanism constructed in accordance with my improvements, portions thereof being broken away to clearly illustrate the construction and the sound producing devices being shown in their relative positions to the several hammers.

Fig. 2, is a front elevation of the same with the clock hands removed.

Fig. 3, is a rear elevation thereof.

Fig. 4, is a fragmentary detail elevation of the segmental gear and its component and cooperating parts illustrated in the positions assumed by the parts during the time the striker is operating.

Fig. 5, is a similar view with the parts illustrated in the positions assumed just prior to the playing the quarter hour chimes.

Fig. 6, is a side elevation of the clock mechanism with portions broken away to illustrate the relation of the different parts.

Fig. 7, is a diagrammatic view of certain of the mechanical elements controlling the chimes and striker looking at the back faces thereof from the front plate of the clock mechanism and showing the parts in the positions assumed during the first step of their operation prior to the playing of the half hour chimes.

Fig. 8, is a similar view showing the parts during the chiming and striking operations at twelve oclock.

Fig. 9, is a detail side elevation of the striker fin mechanism and the relative mechanism for putting it in and out of operative condition.

Fig. 10, is a detail plan view thereof.

Fig. 11, is a detail rear view of the same in diagrammatic form.

Fig. 12, is a detail plan view of the mechanism for actuating the sliding segment of the segmental gear.

Fig. 13, is an end view of the same.

Fig. 14, is a diagrammatic front elevation thereof.

Fig. 15, is a side edge view of the bell crank lever.

Fig. 16, is a top edge view thereof.

In carrying out my invention as herein embodied, 2 represents the supporting frame of the clock mechanism including front and rear plates 3 and 4 respectively, fastened tocarried b gether in any suitable well known manner and this frame carries the sprin arbors 5 and 6, the arbor 5 being connecte with the sprin (not shown) which actuates the soun producing devices and the arbor 6 being connected with the spring (not shown) which operates the time gears.

The train of gears which actuate the sound producing devices consists of the drive gear 7 receiving its power from a suitable spring of ordinary construction connected to the arbor 5 and this gear 7.- meshes. with a pinion 8 mounted on the shaft 9. On the same shaft and revolvin with the pinion 8 is a gear 10 meshing with the pinion 11 mounted on a shaft 12 on which is also mounted the escapement wheel 13 and a gear 14, the latter meshing with a pinion 15 on the shaft 16. Said shaft 16 carries a gear 17 which meshes with a pinion 18 on the shaft 19 which carries a gear 20 meshing with a pinion 21 formed on the fan shaft 22, said shaft carrying the controlling fan 23.

On the rear end of the shaft 16 is a inion 24 adapted to mesh with the segmenta gear 25 havmgperipheral teeth around the major portion 0 its circumferences, but having a blank s ce 26, Fig. 14, at one int and with this lank space coo rates t e sliding segment 27 having a, su cient number of teeth 28 to completethe. gear. The sliding segment is rovided with an aperture or opening 29 or registration with the shaft 30 on which the segmental ear is mounted and further provided with s ots 31 through which pass suitable fastening devices such as screws 32, said fastening devices being the web or body portion of the segmenta gear. The lower end of the segment 27 is provided with an outwardly projecting tang 33 which, when the segment is raised, will rest upon theupper end of the rest, lever 34 pivoted as at 35 to, the rear plate of'the frame and theweighted, end 36 of this rest lever is sufiiciently heavy to normally maintain said rest lever in an upright or vertical position while the op site end or portion which coacts with the s iding segment has a bevel nose 37. Adjacent the upper end said sliding ment is rovided with a pin 38, adapted to can age at predetermined intervals by the ift lever 39 having an arcuate foot 40 for contact with said pin 38 and said lift lever is secured to the rear end of a shaft 41 which passes through the frame and projectsbeyond the outer faces of each of'the plates 3 and 4 while on the o posite or front end of said shaft 41 is fixe the bell crank lever 42.

The bell cranklever 42, as shown in Figs. 14to 16'inclusive, consistsofa de ding leg 43 provided'at itslower end wit 7 a proje'c'tion or extension 44 the outer edge of which is beveled as at 45, and an upwardly and outwardly projecting arm 46 provided lever.

with a finger 47 at its outer extremity and further having an inwardly projecting extension or sto lug 48 ad acent its upper outer end, sai sto lu projecting through a suitable slot in t e ront plate 3 and extending beyond the inner face of said plate so as to be moved, at certain times, into the path of travel of the pin 49 projecting from a face near the outer circlmiierence of the gear 20. The extension 44 at the lower end of the depending arm 43 of the hell: crank lever 42 coacts with the cam or star wheel 50 which is fixed to the minute hand shaft 51. This cam or star wheel is provided with as many 09 cam surfaces as there are fractional parts of the hour to be soundedand since the present invention contempla es. .sound' the quarter hours, three identical 08m $11 52 and one longer cam surface 52" are pm vided and said longer one is positioned for operation when the minute hand is at. quarter past the hour.

On the minute hand shaft 51 isalSO fixed a pinion 53 meshing with the ar 54 on the stub shaft 55 and on said sha and, I'QVOlY'. ing with said ear is a pinion 56 mes i with the gear 7 fast on the hollow sh or sleeve 58 carrying the hour hand and other mechanism to be later described. The hour hand is represented by the numeral 59 and the minute hand by the numeral 60. On this hollow shaft or sleeve 58 is a snail 61 so as. to revolve with the hour, hand'and remain in constant relation thereof; The snail 61is provided with, twelve steps that successivieldecrease in radius and control both the 0 'me and striker hammersonlyat the difl'erent hours while incombination, of other associated elements the chime hainmers are controlled during their movements at the fractional parts of the hour whichis herein set forth as each quarter, hour,- and the operation of these parts will hereinafter be more fully explained. I

The ear 54 also meshes witha inion 62 W on anot er stub shaft 63 on whicli is nalled, for revolution with the pinion, 62, a cam wheel or secondary snail 64 having'a number of steps, here shown as four in number, which successively decreasein radin: apd ltihis secondary sfnalill or1 cam wheel con rost emovementso t ec lever 65,pivoted at 66. um?

Said chime timing lever includes thfi lower arm 67 withan inwardly projecting finger68, Ei 6, which engages the surfaces or steps of t 'e secondar snail 64, said engagement bein normal y maintained bya spring 69. T is lever also includes the upper arm 70 provided with a head 71 prov1 ed with a plurality of steps 72' decreasing in height or radius when considered relative to the pivot point of the timing m 'Ar ranged for coaction with the several steps 72 of the chime timing lever as well as the different steps of the snail 61, when the head of the timing lever is in a certain position, is a pin or dog 73 carried by the free end of the arm 74 journalled on the stub shaft 75. The in or dog 7 3 is pivoted or otherwise movab y attached to the arm 74 and is actuated by a spring 76 whereby said dog is normally held at right angles to the arm 74. Should the snail be rotated while the dog is below or within. the outer circumference of said snail then said dog or pin would be forced out of the way and the snail permitted to pass, without causing damage to the parts, after the manner of a ratchet.

Connected with the arm 74 so as to move therewith, as by a sleeve or arbor 77, Figs. 1 and 6, is a rack arm 78 carrying an arcuate rack 79 at its outer end which is normally held in a raised position by the check lever 80. Said check lever is pivoted or journalled on a stub shaft 81 carried by the front plate of the frame and is substantially L-shaped so as to pass beneath or beyond certain other arts of the mechanism as will be obvious rom the drawings, and thelower end of said check lever is rovided with a catch 82 in the form 0 an outwardly projecting integral extension and this catch prevents retrograde movement of the arcuate rack. This check lever further carries a lifting pin 83 adapted to be engaged by the outer or free end of the bell crank lever 42 when said bell crank lever is actuated by the cam or star wheel 50 so as to raise or oscillate the check lever 80 and disengage the catch 82 from the lower end of the arcuate rack thereby permitting the latter to descend by gravity, said descent being limited by the step or surface of the snail or chime timing lever which happens to be in the path of travel of the dog or pin 73.

After the check lever has been disengaged from the arcuate rack, the continued move ment of the clock will cause that point of the star wheel which has actuated the bell crank lever to pass beyond the extension 44 allowing said bell crank lever to return to its original or normal osition thereby disengaging said bell cran lever from the lifting pin 83 so as to permit the check lever 80, and more particularly the catch 82, to engage the serrations of the arcuate rack and then as said rack is intermittently raised or returned to its normal position, the catch 82 will progressively engage the different serrations of said arcuate rack to prevent retrograde movement thereof.

The arcuate rack is raised or lifted by the gathering pins 84 arranged in spaced relation on a disc 85, the latter being mounted on the forward end of the shaft 16 or on the same shaft that carries the pinion 24 on the rear end, it being remembered that the pinion 24 meshes with the mutilated gear The check lever 80 is also provided with a stop 86, Figs. 6, 7 and 8, which projects through a slot 87, Fig. 2, in the front plate 3 and extends beyond the inner face of said plate into the path of travel of the pin 88 projecting from a face of the gear 20 but located close to the center of said gear. \Vhen the pin 88 is in engagement with the stop 86 all of the sound producing mechanism is normally at rest and during the first ste of the movement to sound the chimes or striker the check lever 80 is raised or oscillated until the parts are in the position shown in Fig. 7 therefore the arcuate rack has been released and the stop 86 on the check lever disengaged from the pin 88 on the gear 20 and in order that sufiicient time shall elapse to permit the parts to assume the positions shown in Fig. 7, the mechanism is again stopped by the pin 49 engaging the stop lug 48 on the bell crank lever which has been moved by the star wheel 50 so that the stop lug 48 is in the path of travel of the other pin 49 on the gear 20.

On the plates of the clock frame is journalled a striker shaft 89, one end of which projects beyond the rear plate and has a crank 90 connected therewith and to this crank is piw'oted one end of the pitman 91 the opposite end being pivoted to a crank 92, the same as the crank 90, which is attached to a suitable portion of the striker hammer 98 so as to raise said striker hammer as the shaft 89 is rotated and this striker hammer is adapted to produce a sound upon a suitable gong, bell or other sound producing member 94 which in ordinary practice is secured to the clock case (not shown) of any desirable construction or configuration. In that portion of the striker shaft 89 located between the two plates of the frame is formed a slot 95, Fig. 10, having pivoted therein a striker fin 96 as at. 97 and the free end of said fin pro vided with a cut out portion to produce the extension 98 adapted to engage the solid portion of the striker shaft beyond the end of the slot and limit the downward movement of said fin.

\Vhen the fin is in its lowermost position, as shown in Fig. 6, the lower portion or edge thereof is adapted to be engaged by the escapement wheel 18 so as to oscillate the striker shaft 89 in one direction and thereby raise the striker hammer 93 through the medium of the cranks and pitman, said hammer and associated parts being returned to their normal positions by gravity as soon as the pressure of the engaging tooth of the escapement wheel is removed from the fin, which is ordinary practice and will be readily un derstood.

Said fin 96 is controlled by or normally held out of engagement with the esca ement wheel by a rod 99 or its equivalent, fixed to a shaft 100 journalled in the plates of the clock frame and having one end projecting beyond the rear plate. On said projecting end is mounted a striker control lever 101 provided at its outer free end with a toe 102 the latter being in constant engagement with the striker control disc 103, said disc being fixed to the shaft 30 so as to revolve in unison with the segmental gear which, as before stated, is also fixed to the shaft 30. Said striker control disc is provided with a peripheral notch 104, Fig. 11, adapted to be engaged at predetermined intervals by the toe 102 so as to permit the striker control lever 101 to drop and rotate the shaft 100 a sufiicient distance to cause the rod 99 to be lowered and thereby permit the striker fin 96 to drop until the extension 98 thereof contacts with the striker shaft 89 and the lower edge of said fin is moved into the path of travel of the teeth of the escapement wheel.

On the shaft 30, which is the same shaftcarrying the segmental gear and the striker control disc, is mounted the music or chime roll 105, the same being made fast to said shaft so as to revolve therewith and this shaft is journalled in the rear plate of the clock frame and a strip 106 suitably su ported by the braces 107 or the like. T e music or chime roll is provided with a. number of projections 108 and these are arranged to actuate the chime hammers 109 each carrying a trip 110 and said hammers, said chime hammers as well as the striker hammer all being journalled upon a shaft 111, the ends of said shaft being mounted in the strip 106 and the rear plate of the clock frame. The chime hammers are adapted to strike suitable chime gongs or other sound producing members 112 supported in the same manner as the sound producing member 94.

The clock pendulum is represented by the numeral 113, Figs. 1, 3 and 6, and this is connected to the proper part in any desirable or well known manner.

The operation of the device is as follows Presuming the minute hand to be approaching the half hour then the proper cam surface 52 of the cam or star wheel 50 will force the lower-arm 43 of the bell crank lever 42 outward, as shown in Fig. 7. This action will raise the outer end 47 of the upper arm 46 of said bell crank lever so as to disengage the catch 82 of the check lever 80 from beneath the arcuate rack 74 permitting the latter to descend until the pin or dog 73 engages the intermediate step 72 on the head 71 of the chime timing lever 65, it being understood that said chime timing nwmae lever has been pro rl sitioned means of the cam or sec dl id r snail which is timed to revolve once each hour. In'thil way the distance that time atolmte rack is lowered or dropped has been determined, at in other words, the rack hasheen dropped, suflicient distance to expose four of its teeth to the action of the gatherin pins. 84. At the same time the stop 86" on e chad: law 80 will be moved out of the path of travel of the pin 88 on the gear or warni wheel 20 and the stop in 48 on the bell crank lever 42 will be moved into the path of travel of the pin 49 on the same gear or warning wheel 20 so that the parts will operate until the pin 49 contacts with the stop lug 48 at which time all the parts are at rest, as shown in Fig. 7, which will prevent me striking: rs from running until the minute hand lias exactly reached the half hour at whichwtime the projection or extension 4.4 at the lower end of the bell crank lever will drop of the cam surface which has moved the bell crank lever, onto the lowest point of the next succeeding cam surface as in Fi t 8.

Said bell crank lever drops b gravity and in its movement the stop in 8 is removed from the path of travel of t a pin 49 of the gear or warning wheel 20 thereby permitting the striking gear train to actuate and cauae the gathering pins to revolve and successive teeth of the rack to intermi raise the same, any retro ado movement of said rack being prevente b on gamut of the catch 82 on the check l ver z) with the serrations of the rack, and when said rock has been raised a sufiioient distance to permit the catch 82 to pass beneath the lower end of said rack the stop 86 of the check lever will move into the path of travel (if the pin 88 thereby stopping any further movement of the striker mechanism.

The same action takes place on any other fraction of the hour for which the mechanism is designed and since the present one contemplates playing the chimes each quarter hour this action takes place on the hour, prior to striking, as wel as the quarter, half and three quarters past the hour. At

the quarter hour the fall and subsequentlift of the arcuate rack 79 is limited b the highest step 72 on the chime timing ever, whereas on the half hour the intermediate step of the chime timing lever regulates the moving distance of the rack, while on the three quarter hour it is controlled {he lowermost step on said chime timing ever.

On the hour the highest cam surface of the cam or secondary snail 64 will engage the arm 67 of the chime timing lever so as to move the head 71 of said lever entirely out of the path of travel of the pin or dog 73 thereby permitting the arcuate rack to descend until the pin or dog 73 ongages one of the steps or surfaces on the snail 61 so that the rack will have to be lifted a sufficient distance to permit the chimes to be played and the striker hammer actuated as will be presently described.

During the movements of the mechanism while the arcuate rack is being raised motion is transmitted through the shaft 16, on which the athering pins are mounted, and through tie pinions 24, also mounted on said shaft, to the segmental gear 25 which is mounted on the shaft 30 thereby causing the music roll 105 which is also on said shaft, to revolve and actuate the chime members.

As the striker controlling disc 103 is fast on the same shaft 30 as the segmental gear the notch 104 in said disc will be advanced toward the toe 102 of the striker control lever 101 as will be obvious.

As the time mechanism continues its movements the hands of the clock will be advanced until the minute hand approaches the three quarter position which movement will cause another cam surface 52 of the cam or star wheel 50 to actuate the bell crank lever as hereinbefore described and at the same time will advance the snail 61 and the secondary snail or cam wheel 64 until the lowermost or third step 72 on the chime timing lever is in the path of travel of the pin or dog 73 so that when the arcuate rack is released it will descend until the dog or pin 73 contacts with the lowermost one of the steps 72 on the chime timing lever and therefore during the return of the arcuate rack to its normal position it will move over a greater distance and the chimes will be played a greater length of time.

The continued movement of the time mechanism will advance the minute hand toward the hour position and during said movement another of the cam surfaces 52 will actuate the bell crank lever and again work theparts as before described until the head of the chime timing lever has been moved completely out of the path of travel of the dog or pin 73 and the proper hour step on the snail 61 positioned in the path of travel of the pin or dog 73 so that when the arcuate rack is released it will descend the distance determined by the movement of the arm 74 which will be necessary to permit the pin or 'dog 73 to descend onto the snail step and when the striker mechanism begins to operate the rack will be raised'as hereinbefore described causing the chimes to be played and when said chimes have been struck the desired number of times thesegmental gear 25 will have been advanced until the blank portion 26 thereof has reached the pinion 24 thereby preventing further revolution of the segmental gear :so that the shaft on which it is' mount? ed will be stopped and the chimes will cease playing. The striker control disc 103 revolving in unison with the segmental gear just as the blank space of the gear reaches the pinion 24 the notch 104 on the striker control disc 103 will reach the toe 102 on the striker control lever 101 and permit said lever to,descend. The descent of said lever will rotate the shaft 100 on which it is mounted so as to move the rod 99 downward which will permit the fin 96 to descend into the path of travel of the teeth on the escapement wheel 13 and be actuated by said escapementwheel as long as the shaft 16 continues to revolve or until the arcuate rack has been lifted to its normal raised position and the mechanism stopped by the engagement of the pin 88 with the stop 86 on the check lever. The action of the escapement wheel upon the fin 96 oscillates the shaft 89 and transmits motion through the two cranks 90 and 92 and the pitman'91 to the striker hammer 93 caus-' ing the latter to sound the hour upon the gong or sound producing member 94.

As the minute hand is advanced to the quarter hour position, the cam surface 52 which is of greater length than the others on the cam or star wheel 50 will move the bell crank lever 42 a suflicient distance to causethe arcuate foot '40 ofthe lift lever 39 to engage the pin38 of the sliding segment and raise said sliding segment until the teeth thereof mesh with the pinion 24 at which time the rest lever 34 will pass beneath the tang 33 of the sliding segment, as shown in Fig. 5, thereby holding said sliding segment in the position that completes the segmental gear, even after the lift lever 39 is returned to the position shown in Fig. 4, which is the position of the lift lever when the bell crank lever 42 is on the lowest part of any one of the cam surfaces. When the minute hand reaches the quarter hour and the bell crank lever returns to its normal position, the striking mechanism will begin its operations and cause the chime hammers to be actuated and since in this position the highest one of the steps 72 on the chime timing lever will be in the path of travel of the dog 73 the descent of the arcuate rack will be very short and the chimes will be played but few times during the return of said arcuate rack to its normal position. Should the segment 27 remain in the position which completes the segmental or mutilated gear 25 for any reason whatever it will be forced backward just prior to the blank space or themutilated gear reaching the pinion 24 by the pin 38 riding under the beveled surface 115 of the segment setting member 116.

If for any reason the hands of the clock turn back less than one quarter hour when the minute hand Was originally at the hour ition and after the sounding devices have en actuated, the star wheel 50 will engage the arcuate bevel surface 45 on the extension 44 of the bell crank lever and because of the a resiliency of the lower or depending arm 43 will force said arm toward the front plate of the clock frame and mit the star wheel to pass the bell crank ever extension without injury to any oi the parts; This move- 10 ment does not actuate the bell crank lever and therefore all the parts remain in the same positions as when the minute hand is at thehour' position. When the hands are in advanced and the minutehaud reaches 15 t a hour position the bell crank lever. will be actuated and the a'ncuate rack released so the sound producing mechanism will begln the operating but asithe blank space of the tal orl'mutilated gear is in registraac tion with the pinion 24 the chimes willpot be pla .ed and as the toe 102 oi the strlker contro clever 101 is in the notch 104 of the disc 103 only the striker hamm r W 11 be actuated and as' this is then actuated 26 throughout the entire distance of that rtilo'n of1k the arcutzge rack whiflaqdeseen is,

t estr"esupon egong W1 ,a'g ea number than the l'1our- -a t which theflhitnds point, but when the minute hand s ad "1'3? segm i h a1 si "g ento t esegmen, be moved into position; theneby the music. roll, the striker, contro 'dit an the segmental gear in roper relation to the IQ movements of the hen so. that the meet number of chimes will he struck and as the snail 61 is inconstalit relation, to the hour. hand the striker. hammer will. produce the cormct'number of: sounds upon the sound producing. member-at the next or succeeding ours.

Should the hands he turned back at any time"hetween'the hours, as "for instance after the chimes have been. played. for the three arten hour, then the sequence of the sound Foducing devices. will be changed with reation to the hands, and if the mental gear has not advanced too far. on the proper number ofi chimes will be played becauseof the relation of. the. chime timin' 1ever65fto the pin or dog- 73', but if the segmental gear has advanced so far that the notch in the striker control disc has aegisteredwith the toe of the strike]: control lever their the strilmr hammer will be actu Med and the number of strikes made thereby will'be too man'v for-the hour to which the hands point. i

When the parts are not in synchronise and have been advanced so that the notch in the striker control disc 103 re 'sters with the toe 102 of the striker contr Tever- 101 the music roll will have been advanced: in the same relation and the segmental 'gear )5 will alsc'have' been traced until itsblank to the quarter h ur position. h

g may be revolired, a sliding se Lew-,1

space has registered with the pinion 24. which revents further movement of the mental gear and its co-related parts ant F the minute hand reaches the quarter hon! position at which time the se entalgear--76 will be completed as before escrihed and the parts will again be actuated in chronism. Of course I do not wish to, be limited on the exact details of construction as Mme": shown as these may be varied withini'tho limits of the pended claims without parting from s s irit of my invention Having thus fu y described m inyesi I tion, what I claim as new and usefu 1. In a device ofthe character stated, the combination of chime hammers, a music for actuating said chime hammers, astriker' hammer, means for-placing said striker ham mer in and out of operative tion, a notched disc revolving with the music rhll for controlling said means, a mm gear revolvin in unison with thenotcheddisc and music roll, means for transmitting mg tion to said segmental gear, a time mocha nism and a mechanism controlled by the time mechanism for starting the segmental gear at predetermined intervals for syn chronizi the different hammers with the time mec anism. T

2. Ina device of the character stated, th e combination of a time mechanism, a striker mechanism including an escapement wheel] and a warning gear, chime hammers, a music roll for actuating said chime hammers, a striker hammer, a pivoted fin ada to co operate with the escapement wheel for actji} atin the striker hammer, a shaft, means carr ed by said shaft and coacting with the pivoted fin for causing said fin to move and out of engagement with the esca t wheel, a striker control lever carried y said shaft, a disc having a notch therein adapt ed to revolve in unison withthe music roll and coactin with: the striker'control lever for controll g the strikerhammer, a sag mental gear, a pinion receiving its motion from the striker mechanism and coacti with the segmentalgearwhereby the by said gear whereby it may com for starting the same, msanapont'nol by the time'mecliani sm for moving the said segment into; rati-ve position, and means for holdingsai segment in said position un til the segmentalgear has started revolving.

3. In a device of the character stated, the" combination of chime' ham'ine'rs, aimusi rll" for actuating said chime' hammers, a striker hamme'r, means for ac'tuat' hammer, a'sliaft, means catci 'b v said shalt for controlling the first flamed time 'a' striker control lever carried' by said she a striker control with which" the control lever coacts'to prevent the striker "hammer:

ant carried the striker from operating, said disc having a notch therein whereby the striker hammer may be placed in operative condition, a segmental gear through which motion is transmitted to the control disc and music roll, said gear having a blank space, a segment having teeth for completing the gear, a lift lever for moving the segment into operative position, means for actuating said lift lever at a pre determined time and means for temporarily holding the segment in operative position.

4. In a device of the character described, a striker shaft having a slot therein, a fin pivoted within said slot, an escapement wheel coacting with said fin to oscillate the striker shaft and means for holding said fin away from the escapement wheel.

5. In a device of the character stated, a striker shaft, an escapement wheel adjacent thereof, a fin pivoted to the shaft and adapt ed to be engaged by the escapement wheel for oscillating the striker shaft, and means for holding said fin out of engagement with the escapement wheel until a predetermined time.

6. In a device of the character stated, a striker shaft having a slot therein, a fin pivoted to the shaft within said slot, an extension projecting'from the free end of said fin and adapted to engage the shaft adjacent one end of the slot to limit the movement of said fin in one direction, an escapement wheel for engaging the fin to oscillate the striker shaft, and means for holding the fin out of engagement with the escapement wheel.

7. In a device of the character stated, a striker shaft having a slot therein, a tin pivoted to the shaft within said slot, an extension projecting from the free end of said fin and adapted to engage the shaft adjacent one end of the slot to limit the movement of said fin in one direction, an escapement wheel for engaging the fin to oscillate the striker shaft, a shaft, a rod fixed to said shaft and coacting with the fin to move and hold said fin out of engagement with the escapement wheel, a striker control lever having a toe at the free end thereof and a revolving striker control disc on which the toe of the striker control lever rests, whereby the fin will be held out of engagement with the escapement wheel, said disc having a notch therein into which the toe of said lever drops for placing the fin in operative position.

8. In a device of the character stated, a gear having a blank space, a segment having teeth for completing the gear, and means associated with the minute hand of a clock for actuating said segment.

9. In a device of the character described, a gear having a blank space, a sliding segment having teeth for completing the gear,

said segment carried by the gear, means for moving the segment into operative position, and means for temporarily holding said segment in operative position.

10. In a device of the character described, a gear having a blank space, a sliding segment having teeth for completing the gear, said segment carried by the gear, a lift lever for moving the segment into operative position, a shaft to which. said lever is fixed, another lever fixed to said shaft, means for actuating the last named lever to cause the lift lever to operate the segment and means for temporarily holding said segment in operative position.

11. In a device of the character stated, a gear having a blank space, a segment having teeth for completing the gear, a tang projecting from the segment, means for moving said segment into operative position to complete the gear and a pivoted rest member coacting with the tang to temporarily hold the segment in operative position.

12. In a clock mechanism the combination of a snail, a pivoted rack governed by said snail, a sound producing mechanism, means carried by said mechanism and cooperating with the pivoted rack for intermittently actuating said rack at predetermined intervals, a sound producing device connected with the sound producing mechanism and adapted to be actuated during the intermittent movement of the pivoted rack.

13. In a clock mechanism, a segmental gear, a pinion cooperating with said segmental gear, a sound producing mechanism by which motion is transmitted to the pinion, certain sound producing devices, means receiving its motion from the segmental gear for actuating said sound producing devices, a pivoted arcuate rack, means actuated by the sound producing mechanism for moving said rack intermittently in one direction, means for preventing retrograde movement of the rack, a snail for limiting the movement of the rack in an opposite direction and means for releasing the rack and, the means which intermittently moved said rack.

1%. In a clock mechanism, the combination of a snail associated with the hour hands of the clock and having twelve steps, a cam wheel or secondary snail, means for transmitting motion to said cam wheel whereby the latter will make one complete revolution each hour, a chime timing lever having three steps and actuated by the cam wheel, a pivoted arcuate rack having a pin associated therewith for coaction with the steps of the chime timing lever during fractional parts of an hour and the steps of the snail on the different hours at which time the chime timing lever will have been moved out of the path of travel of the pin for determining the distance of descent of said rack, sound producing devioeg, means for actuating the sound producing devices and lifting the rack and means associated with said'rack and said means to actuate the sound producing devices for preventing

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