US1250173A - Automatic synchronizing mechanism. - Google Patents

Description

W, J. HERSCHEDE & C. COHAN. AUTOMATIC SYNCHRONIZING MECHANISM.

APPLICATION FILED DEC. [4, 1916- Patented Dec. 18, 1917.

2 SHEETS-SHEET l.

- W. J. HERSCHEDE & C. COHAN.

AUTOMATIC SYNCHRONIZiNG MECHANISM.

APPLICATION FILED 050.14. 1916.

1,250,173. Patented Dec. 18,1917.

' I], 2 SHEETS-SHEET 2.

41M QUARTER QuA RTER QUARTER H0 UR UNITED STATES PATENT OFFICE.

WALTER J. HERSCHEDE AND CHARLES COHAN, OF CINCINNATI, OHIO, ASSIGNORS TO THE HERSCI-IEDE HALL CLOCK COMPANY, OF CINCINNATI, 01-110, A CORPORATION OF OHIO.

AUTOMATIC SYNCI-IRONIZING MECHANISM.

Specification of LetteTsPatent. Patented Dec 18, 1917 Application filed December 14, 1916. Serial No. 136,833.

To all whom it may concern:

Be it known that we, WVALTER J. HER- SCHEDE and CHARLES Conan, citizens of the United States of America, and residents of Cincinnati, in the county of Hamilton and State of Ohio, have invented a new and useful Improvement in Automatic Synchronizing Mechanism, of which the follovvlng is a specification.

This invention relates to and has for an object to produce a mechanism for automatically synchronizing the chime striking and time indicating mechanisms of clocks of the series revolution chime drum type, that is, clocks having chime drums which rotate more than once during each hour to complete the striking of the chime.

A further object is to produce a mechanism adapted automatically to correct the striking of the chime in a clock of the series revolution chime drum type, so that should the chime be inadvertently thrown out of adjustment in that it fails to strike the proper chime at the respective quarters of the hour, at the succeeding hour the chime striking mechanism will be adjusted correctly to strike the proper chime at the proper quarter.

A further object is to produce a clock having automatic synchronizing mechanism adapted to permit independent adjustment of the hour and minute hands without throwing the time indicating and chime ringing mechanisms out of synchronism.

These and other objects are attained in the mechanism described in the following specification and illustrated in the accompanying drawings, in which:

Figure 1 is a front elevation of a clock movement embodying our invention.

Fig. 2 is a fragmental transverse sectional end elevation taken on the broken line 22 of Fig. 1.

Fig. 3 is an end elevation of the chime drum, taken on the line33 of Fig. 1, some portions being shown in, section and some fragmentally.

Fig. 4 is an end elevation of the track which controls certain of tllCInOVGlTlBIlCS of the chime drum, the view being taken on line 4& of Fig. 1. v

5 is a sectional view of the track and e nts pee rati g e ewith. the ea l of I the chime-drum being shown fragmentally and in cooperative relation with the track.

Fig. 6 is a view of the releasing and stopping mechanism of the chime drum operating train, the mechanism being shown in the position it assumes upon release of the drum rotating train.

Fig. 7 is a more-or less diagrammatic view illustrating the positions assumed by the stopping and releasing mechanism disclosed in F 6, when the chime train is brougl'it to a stop.

Fig. 8 is a view similar to Fig. 7, but showing the stopping and releasing mechanism in the position it assumes in the motion of its elements to their train releasing positions.

Fig. 9 is a view similar to Figs. 7 and 8, showing the same position of the stopping and releasing mechanism as disclosed in Fig. 6, the disclosure in Fig. 9 however, being diagrammatic. 4

Fig. 10 is a sectional View: of the track, taken on the line 101O of Fig. I.

Fig. 11 is arepresentation of the notes of the music of the chime struck by the mechanism illustrated as an embodiment of our invention. 1

The clock embodying our invention con sists of the usual chime train and time train and the mechanism for releasing and stopping the chime train is of a construction like that heretofore employed. In general the operation of the entire mechanism closely resembles the mechanism disclosed in United States Letters Patent 909,298, issued to Edward F. I-Ierschede upon January 12, 1909. However, in the construction herein disclosed'the invention consists of a mechanism adapted to synchronize the movement of the twoqrevolution chime striking mechanism with the time train with which it cooperates, instead of a single'revolution chime drum and operating mechanism thereof, as disclosed inthe above mentioned patent.

In the embodiment ofour invention we have. disclosed a clock movement having chime mechanism adapted to strike the WVestminster chime. The music of i this chime, as in some other chimes employed in chime clock construction, is written particularly for two revolution chime drum mechanisms, the first five measures of the chime music, as disclosed in Fig. '11, being a dupli;

cate of the last five measures. This permits of the playing of the complete chime byrotating the chime drum twice during the hour, the various quarters being set forth in brackets in Fig. 11. It will-be seen that the third quarter of the chime includes the last two measures of the first half of the complete chime as well as the first measure of the second half. Such an arrangement necessitates the playing of the first measure of the chime for the first quart-er. of thehonr, the second and third measures for the second quarterorhalf hour, the fourth, fifth and sixth measures for the third-quarter, and the last four measures for the fourth quarter at which time the hour is completedand the chime placed in conditionto strike the hour as indicated at the end of thechime music. The striking of the correct measuresat the designated quarters of thehour, however, is frequently disarranged by tampering with the chime striking mechanism orby allowing the chime striking mechanism .to rundown independently of the time train so that upon rewinding the striking mechanism the chime is thrown out of its proper arrangement. The readjustment of the striking mechanism to correctly correspond with ;the quarters, necessitates a certain amount of knowledge of the mechanism of the clock movementas well as a knowledge of the music of the chime. The average purchaser of a chime clock is not fully acquainted with either its mechanism or the music which it is adapted to play.

Furthermore,the time indicating mechanisms of clock movements ordinarily used and having chime ringing mechanisms, when run down, necessitate setting the hands by moving the minute and hour hands in the usual manner by grasping the minute hand and moving it around the clock dial until the hour hand is brought to indicate the proper hour. Such a means of adjust ment of the time indicating mechanism necessitates a considerable time in which to correctly set the clock. Furthermore, the chiming mechanism, in order that it be not thrown out of synchronization with the time indicating mechanism, necessitates stopping the hands at each quarter of the hour in order to allow the chime mechanism to play its proper quarter or the time indicating mechanism can :be set and the chime ringing mechanism afterward brought into synchronization with the time indicating mechanism through a tedious process necessitating knowledge of the chime anusicand the mechanism for playing it. Such a procedure is inconvenient in that it necessitates care and time to make the proper adjustment. For this reason the automatic synchronizing mechanism now to be described has been devised.

In this mechanism the usual minute shaft 12 .upon the squared end of which the minutehand 12 of the clock is placed, carries the usual sleeve 13 extending from the usual reduction gear 14 upon which the hour hand 13 is mounted.

Reduction gear 14 which is secured to sleeve 13, meshes directly with a gear 59, the purpose of which will be hereinafter described. iThe rear portion of sleeve 13 is provided with a shoulder 13 upon which agear 14 which is similar to gear14, is rotatively mounted. To the rear of shoulder 13 is an annular groove 13 in which is mounted aspring 14 which bears against an annular shoulder 13 formed on the-sleeve 13. By means of spring 14", gear 14 is maintained in frictional engagement with flange 13 to whichgear 14 is-secured. Gear 14 meshes with a pinion 17 which extends ffroma gear'16 rotatively mountedon a stud extending from the front plate of the clock. Gear 16 in 'turn meshes with gear 15 secured to the minute shaft 12 of the 'timeinindicating mechanism. Gears 15, 16, 17- and 14 'beara twelve to one ratio with relation to one another so that gear 15 rotatestwelve times to onerotation of the gear 14?. Gear 14 being frictionally connected with gear 14, consequently is rotated at the-samearate. Upona stud 18 extending from the front plate of the movement, are=pivotally mounted releasing and tripping levers 19 .and 20 respectively, lever 19 being provided with a finger2l which extends through a slot 22 formed in the front plate of the movement, and lever 20 also being provided with a finger 23 which extends through the slot 22. Both fingers 21 and 23 are adapted to be moved into and out of engagement with the usual ser'es of pins 24'of the chime releasing wheel '25 of the chime train. In its normal position, lever 19 is adapted to have its finger 21 in position to afford an abutment'for any one of the pins 24, and when raised as disclosed in Figs. 1, 6, 8 and 9, to permit-of the passage of the pin bearing against it. Finger 23 of lever 20 is normally in its lower position as disclosed in Figs. 1, 6, 7 and 9, but in its raised position is adapted to intercept the pins 24 and to arrest the movement of wheel 25 by being brought into 'thepath of these pins. In order to raise lever 20 to the position disclosed in Fig. 8, its end 26 is provided with a pawl 27 which, in the lowered position of the lever, lies in the path of a series of pins 28 and 29 extending from the front face of gear 15 forming one of the set of reduction gears above described. Upon rotation of gear 15, the pins will be brought successively into engagement with the edge of pawl '27 and lever 20 will be raised. The pins 28 are located at a greater distance from the center of shaft 12 than is the pin 29. Therefore, lever 20 will. be lifted to a 40 mounted on the reduction gear 16.

greater extent by pins 28 than by pin 29.

" The reason for this will i be hereinafter more fully'described. Beneath levers'19 and is located a-stud 30 upon which a awl 31 is pivoted, theend of the'pawl being provided with two notches 32 and 33. Either of these notches isadapted to 'beengaged by a pin 34 located on lever 19,when the pawl has been brought toits elevated position as disand the pawl is elevated to the point where pin 34 of lever l9'enters notch 32. The

result is that lever 19, Whether its pin 34 occupies notch 32'or notch'33, is held in such an elevated position that its finger 21 is caused to release the pins 24. Immediately after'the passage of either the pins 28or29, beyond the pawl 27, the lever 20 is dropped, the finger 23 being moved by such a move ment, away fronithe pins 24, thereby releasing the chime train,'pawl 31 being held in its elevated position with relation to lever 19 by'reason of the friction of pin 34 in either of the notches 32 or 33. Lever 19 is moved'from its raised position-by engagement of a finger 36 formed on an upwardly projecting arm 37 of the lever, with suitable releasing mechanism hereinafter to be more fully described.

As a portion of the 'synchronizing'mechanism embodying our invention, we have provided a stud 38 uponwhich a lever '39 is pivotally mounted, the lowerend of the lever being adapted to be engaged'by a pin This lever 39 is retained yieldingly in position to be engaged by pin 40, by means of a spring 41 secured to thefront plate of'the movement asshownin Fig. 1. of lever39 is provided with an inwardly extending finger 42 located in alinement with the adjacent end of shaft 43-of the chime drum. Since gear 15 rotates once during each hour, gear=16 which bears a one to one ratio with gear 15, also rotates once every hour. For this reason pin which engages the end of lever 39, causes operation of lever 39 once everyhour. The function performed by the operation of lever 39 at such a time, will be hereinafter more fully described. I

The chime .drum 44 is of the usual construction in that it is provided with a series of pins 45..adapted to cause'operation of the t5 hammer operetingilevers 46, these The upper end l'e'vers "in turn being pivotally mounted" "in the usual manner 'on" a. bar47 extending longitudinally of the -movement and located above it onbrackets" 48 positioned at each end of the movement,'the brackets being'secured -to the front and back plates thereof in any suitable manner; The drum -44- 'is rig-idly mountedon its shaft 43 which is adapted to slide in bearingsformed in the brackets 48, 'the'end of the drum adjacent to the chime train, being provided with' 'a wide face gear 49 which Ine'slieswith the usual crown gear 50 extending from the chime train and permits of the drums reciprocation without disengagement of gear '49 from gear 50.

At the end of shaft 43 which bears". gear 49, a spring 51 is provided, this spring being secured to the plates of the movement in any suitable manner, the. tendency of the spring being to force the drum toward the opposite end of the movement'and 'to bring the opposite end of its shaft'43 into 1 engagemenflwith finger 42 of lever 39.

Itis the mechanism provided at the left hand'end of the drum, which constitutes the principal feature of novelty of our invention. This mechanism consists of"se'veral elements, chief among which isa' member 52 w'hich-will be'design'ated the first track. This member is hollow andjis provided in its interior with a gear 53 which is rotativel'y mounted on drum s'haft 43. This gear 53 meshes with a pinion 54 secured to-a' shaft 55 extending obliquely between the front and back plates of the movement and provided at -its lowenen'd with a pinion "56 which meshes with a gear 57 'carried by a shaft 58 extending through the front plate of the inovementand which is providedat it'sfront end with gear59 which meshes with the reduction gear14, gear 59 and gear 14 "bearing a one to one gear ratio with relation to each other. The'sizes of'gears 53 and 57'as well as pinions'54 and 56, with relation to one another, is such that both gears 'rot'ate'on'ce every 12 hours, the same as does gear 14. Gear 53is provided with an annular flange 60, this flange extending beyond the periphery of the opening 61 located' in the center of the annular track member 52. This provides 'a second track 62 theus'es of which will be hereinafter described. Centrally located of the'tr'ack 62 is an opening forming a hollow 63 in the gear 53, the bottom 67 of the hollow forn ingthe third track, the functionof which willbe hereinafter described. The annular track formed on the end face of member 52 is provided with a spirally formed groove 64, this groove being semi-circular in cross section and extending spirally twice "around the track, the inner end terminating in the opening- 61 formed centrally of thegine'mb er 52. The sentinel track 62 formed on the end face of the flange 60 is left plain, a notch 65 being provided however, in this track, this notch having one wall 66 inclined as disclosed in Figs. 4 and 10, the opposite wall also being inclined but in a plane extending toward the hollow 63 of the gear 53. The bottom of the notch is in the same plane as the bottom 67 of the hollow 63. On that end of the drum located adjacent to the groove or track 64, an arm 68 is pivotally mounted on a pin 69 secured to the end of the drum, the movable end of the arm having a pin 70 extending toward the track 64 and adapted to occupy it. This arm 68 is adapted normally to be pressed outwardly by a spring 71, so that its curved outer edge many engage the curved inner surface of the recessed end of the drum. This pin 70 is normally in engagement with the outer convolution 72 of the track 64 during the first half of the hour, or during that portion of the hour in which the first and second quarters of the chime are struck, in addition to a portion of the time during which the third quarter of the chime is struck, the

outer convolution being operative during the first half of the complete chime located to the left of the line AA of Fig. 11. The last measure of the chime struck at the third quarter of the hour, is played during and after the passage of the pin 70 from the outer to the inner convolution 73 of the track. At the completion of the third quarter, pin 70 is in the position disclosed in the drawings, viz., in the second or inner convolution of the track. When the last quarter is to be chimed and the hour is to be struck, pin 70 travels from the last men tioned position, to the position in which the inner end of track 64 disengages it therefrom and directs it into the opening 61 and onto the second track 62. This permits the drum to move to the left under the influence of spring 51, thus removing pins from chime hammer operating levers 46 and plac ing a series of hour striking pins 74 into position to engage the hour hammer operating lever 46, which operates the hammer adapted to strike the hour. Rotation of the drum is continued until the pin 70, traveling on second track 62, reaches notch 65, at which time the inclined surface 66 permits the pin to drop to a level with the third track or bottom 67 of the hollow 63, thereby disengaging it from track 62, the drum shifting again to the left under the influence of spring'51 and rotation thereof continued until pin 70 has been moved from the notch into the hollow 63. At this time the rotation of the drum is stopped.

WVe will now describe the mechanism for stopping the rotation of the drum. Located on the drum in position to engage finger 36 of stop lever 19, are two pins 75 and 76, pin 75 being adapted to stop the rotation of the chime drum by tripping lever 19 and dropping it so as to have its finger 21 engage one of the pins 24, at the time of completion of thefirst quarter hour chime. Pin 76 is so positioned on the drum as to stop it in the same manner upon completion of the second quarter or half hour chime. Upon completion of the third quarter the pin 75 again is brought into operation to drop lever 19 and to stop the chime drum. However, when the fourth quarter is reached, pin 29 which has operated lever 20 and pawl 31 to lift lever 19 to the position wherein its pin 34 is brought to occupy notch 32 of pawl 31, has

' caused finger 36 of lever 19 to be moved to such a position as to just miss pins 75 and 76 in their passage during rotation of the drum. This position of lever 19 is sufficient however, to permit of the passage of pins 24 of the chime train and to thereby permit of operation of the chime mechanism when finger 23 of lever 20 is removed from the path of pins 24. This permits the chime drum to rotate without hindrance during the four measures comprising the fourth quarter chime strike, thus avoiding pin 76 which would normally stop the chime mechanism were lever 19 raised to the position in which its pin 34 occupies notch 33. However, upon completion of the chime strike, pin has reached the end of track 64 and aasses on to second track 62. This causes further shifting of drum 44 and brings pins 74' into engagement with the hammer operating lever 46. As soon as sufficient pins 74 have passed the end of lever 46 to strike the proper hour, notch 65 of gear 53 is encountered by pin 70 and the drum is shifted toward track member 52 by spring 51 to bring the pins 74 out of alinement with hour hammer operating lever 46. At this time a lug 77 secured to the surface of the drum, is brought into engagement. with finger 36, the finger is dropped and the chime mechanism'stopped. The position of notch 65 with relation to the inner end of inner convolution 73 of track 64, is governed entirely by the time indicating mechanism of the clock, thus determining the amount of second track 62 over which pin 70 passes and consequently regulating the number of pins 74 which are brought into engagement with the lower end of lever 46', before drum 44 is shifted to bring these pins out of alinement with the lever. In the drawings the notch 65 as well as all other portions of the clock mechanism, are shown in positions in which the chime mechanism has been re leased to chime and strike 12 oclock.

The various elements of the mechanism belng shown in positions in which the chime mechanism is released and ready to start the striking of the chime and hour of 12, the operation which have previously taken place to bring the parts to these positions,

will be described, before proceeding with the description of the operation of the mechanism. It will be assumed that the clock train is approaching 12 oclock. At this point the pin 29 will engage paWl 27 and cause lever 20 to rise, bringing its pin 35 into engagement with pawl 31 and causing pawl 31 to lift lever 19 and pin 34'carried by it until notch 32 is encountered, pin 34 dropping into this notch. Simultaneously with the lifting of lever 20, its finger 23 is brought into the path of the pins 24, and as lever 19 is raised, its finger 21 is carried out of the path of pins 24. \Vith the parts in this position, pin 29 having lifted the pawl to bring pin 34 into engagement with notch 32, because of pin 29 being located at a less dis tance from the axis of shaft 12 than any of the pins 28, passes pawl 27 and permits it and its lever 20 to drop from the path of pins 24, thus leaving pawl 31 lifted because of its frictional engagement with pin 34 in notch 32. The parts are now in the positions disclosed in Fig. 1 in which the chime train is released and starting the operation of the chiming mechanism. In this position it will be seen upon reference to Fig. 1, that finger 36 of lever 19 is out of alinement with pins 7 5 and 7 6. Also it will be seen that gear 53 is in such a position with relation to track member 52 that marks 78 of both the track member and the ear, register with each other. In this position notch 65 of second track 62 lies immediately back of the inner end of inner convolution 73 of track 64 so that pin will drop on to track 62 instead of into notch 65. It will also be seen that pin 70 occupies the position disclosed in Fig. 4, that is, in the inner convolution 73 of track 64. The chime drum now starting to rotate causes the fourth quarter to be chimed, this quarter being as in the music of the chime disclosed in Fig. 11. Neither of the pins 7 5 or 76 will engage finger 36 because of its position as above described. This permits of completion of rotation of the chime drum to chime the complete four measures of the fourth quarter, and brings pin 7 0 to the inner end of track 64 precisely upon completion of the last note of the chime. The chime drum continues to rotate, but the passage of pin 70 into the opening 61 of track member 52, and on to second track 62, as disclosed at 7 9 in Fig. 4, causes drum 44 to be shifted to bring pins 45 out of alinement with chime hammer levers 46 and to bring pins 74 into alinement with hour hammer lever 46, the drum shifting under the influence of spring 51. Without stopping its rotation, the drum continues, pins 7 4 being brought successively into contact with lever 46 and thus causing operation of the hour striking hammer conected therewith, to strike the correct hour, the pin 70 traveling around the second track 62 during such striking operation, so that each of the 12 pins 74 which are located on the drum, is brought into contact with lever 46 to cause it to strike 12 oclock. At the completion of the twelfth stroke the pin is brought to the position indicated at 80 in Fig. 4, in which it is on the edge of incline 66 which permits drum 44 again to shift to bring pins 74, to the left of and out of alinement with hammer lever 46. The drum continues to rotate until pin '70 has been broughttothe successive positionsshown at 81, S2 and 83 in Fig. 4, at which time lug 7 7 engages finger 36 and lifts lever 19, thereby causing pawl 31 to drop so that lever 19, when released by lug 77 will be permitted to drop and bring its finger 21 into the pathof pins 24 and thereby arrest the movement of the chime striking mechanism.

During the next quarter hour the pin 40 on gear 16, is brought into engagement with the lower end of lever 39 and this lever which now has the end of shaft 43 bearing against its finger 42, is caused to move and to shift the chime drum to the right until it is in such a position that the pin 70 is freed from track member 52 so that spring 71 carries it to a position opposite the outer end of outer convolution 72 of spiral track 64, into which it is carried when lever 39 releases shaft 43, in which position it is ready to chime the first quarter of the next hour. The lower end of lever 39, before the first quarter of the next hour is reached. is released and permitted to drop to its normal position as disclosed in Fig. 1, pin 40 then occupying a position on the opposite side of the lever from that shown in Fig. 1. During the time-that the drum is being shifted to its normal position by lever 39, levers 19 and 20 are again being raised to their ele vated positions, this time being raised by one of the pins 28 instead of by pin 29. Under the influence of pins 28, lever 19 is raised until its pin 34 engages notch 33 of-pawl 31 instead of engaging notch 32. This raises lever 1.9 higher and bring its finger 36 into the path of pin 75. As soon as lever 20 is released upon the clocks reaching the first quarter, the drum will berotated until pin 75 engages finger 36 and causes lever 19 to be raised and to be dropped to bring its finger 21 into the path of pins 24 so as to again stop the chime. The same operation would occur at the second quarter or half hour at which time pin 7 6 instead of pin 75 would cause the stoppage of the chime mechanism. Substantially the same operations are performed previous to, during and after the striking of the third quarter of the hour, pin 75 however, being brought again into operation to release thelever 19 and to stop the chime train. This brings the pin 70 to the position disclosed in Fig. 4, at which the, previousl described operation of striking the fourth quarter of the hour is carried out.

However, in the. hour succeeding the hour of 12, different conditions exist as to the pos1- tion of notch 6.5 with relation to the inner end of spiral track 64. This is because gear 58 has been rotated through its connections 54: to 59, inclusive, through one twelfth of arevolution so as to bring notch sufficiently beyond the inner end of spiral track 64 to permit of the operation of but one pin 74 in engagement with hour hammer lever 46.. Immediately upon causing one pin 74 to cause one stroke of the hour striking ham.- mer, pin is dropped into notch 65 and the drum is shifted to bring pins 74 out of alinement with hammer operating lever. 46. The drum continues to rotate with pin 7 0 within the hollow portion 63 of gear 58, so that after having struck one. oclock the remain.- ing eleven of: the pins 74, will miss theham- Iner. operating lever 46 and the drum will rotate the remaining eleven twelfths o-fa revolution, without any of it pins engaging any of the. levers d6 and 46 at which time the. lug 77 will be brought into engagement with finger 36 to cause stoppage. movement of the leverv 19. It is this idle rotation of thechime drum, which automatically sets or synchronizes. the chime mechanism, with the time indicating mechanism, the drum,

whether it is chiming correctly or not, caus.

ing, the hammer lever operating pins to. be correctly placed for operation on the first quarter of? each succeeding hour. No matter whether the hour striking pins have, operated the hour striking hammer to strike one oclock, or any other hour, they chime drum is. always brought to a stop at the same place. after each hour has been struck, the lug 77 on the chime drum, causing stoppage of the drum at the same place. after each hour striking movement thereof. In this manner the operation of the chiming mechanism, no matter. how badly disarranged. it. may be. to' strike the quarters, will always be. automatically set correctly to strike. the, first quarter of the. succeeding hour.

In the above description it will be, seen that thepin, 70. in its movement around the track portions, first occupies the portion 64, then the second track portion 62 and finally the. third, track portion 67-. Thus, in its.

IL Yement it takes substantially a spiral course, the first portion of its spiral movement being. when it moved from, the outer convolution to the inner convolution of the groove 64; and, the next portion of its spiral movement being when it moved from the inner. portion of groove, 64 to. the second track portion 62-, the final portion of the spiral movement being when it moves. from track portion 62 to third; track portion 67; Therefore, in our improved construction we have embodied a, spiral track member in the various portions of which. differentfunc.

tions of the chime drum are performed. In addition to the spiral movement of the pin in a plane extending transversely of the track, it is alsov given conical spiral movement, the various portions 64, 62 and 6,7 of the track, being located in different planes and the pin describing what is substantially a conicalspiral. in its movement from one plane to the next plane. Our invention permits of the employment of a chime drum having pins spaced for utilization of chime music especially written for two revolution drum mechanisms, the advantages attained by this. two revolution drum construction being manifest in that, simplicity of construction is attained, reduction in size. of chime drum and gears for operating it; is attained, and; cost of materials and manufacturing operations is reduced.

In addition to the production of a synchronizing mechanism for a two. revolution chime drum clock construction, we have-provided a construction embodying elements which permit separate adjustment of the nd minute hands and which will not destroy the synchronism of the chiming mechanism and the time indicating mechanism whether the minute hand. or the hour.

hand is moved to adjust it to. its correct position. This mechanism is embodied in the frictional construction containing the. gears I l and; 14 and spring 14*. In this mechanism, adjusting movement of the hour. hand. 13,, separate and distinct from the minute hand 12 is afforded by reason of the. frictional connection between gears 14% and let. Gear 14 is the. driven gear of the hour hand and through its frictional engagement with flange. 189. of sleeve. 13, it drives gearv 14: which. is rigidly. connectedwithflange 13?. In order to adjust the hour hand it is merely necessary to grasp the hand and rotate, itv with its collarv l8 until it points to the proper hour. This movement causes rotation of gears 14 and 59 and; through shaft'58 causes gears 57 and 5,6: to

rotate. shaft 55, this shaft in turn rotating Gear 53 is the one.

pinion 54: and gear 53. bearingtracks 62 and 67. This brings notch 65 of track 62 into the proper. position with relation to contact pin 70 so that the. drum will. be shifted at the proper time to disengage pins 74 from lever 46 of the hour.

striking hammer. Thus it will be seen that at any positionv to which hour hand 13. is moved, gear 53 will be rotated to bring notch 65 into proper position so that the.

correct hour. will be struck without having to make. any other adjustment of the strikin g mechanism.

In addition to the above novel: features of our invention. we have adapted the releasing. and tripping levers 19. and 20- respectively, togetherv with the pawl 31, to. operate successfully for. chime ringing. mechanisms having chime drums which rotate twice during each hour to complete the ringing of the chime. This distinction over the patent to Edward F. Herschede, above referred to, lies particularly in the provision of the two notches 32 and 33 on the pawl 31 and in the location of the pin 29 with relation to the pins 28 on the gear 15. Were it not for these distinguishing features of novelty the general construction disclosed in the above mentioned patent could not be employed in a series revolution chime'drum mechanism.

Having thus described our invention, what we claim is:

l. A clock comprising time indicating, chime ringing, and synchronizing mechanisms, said chime mechanism consisting of a chime drum and means for rotating the chime drum a number of complet rotations during each hour, and said synchronizing mechanism consisting of a track located at one end of the drum and consisting of a series of convolutions, and a contact device mounted on the drum, adapted to engage the track during chime ringing rotation of the drum and to be disengaged therefrom upon completion of chim ringing rotation of the drum.

2. A clock comprising time indicating, chime ringing, and synchronizing mechanisms, said chime mechanism'consisting of a chime drum and means for rotating the chime drum a number of complete rotations during each hour, and said, synchronizing mechanism consisting of a track located at one end of the drum and consisting of a series of convolutions, a contact device mounted on the drum, adapted to engage the track during chime ringing rotation of the drum and to be disengaged therefrom upon completion of chime ringing rotation of the drum, means for shifting the drum to stop the ringing of the chime, upon disengagement of the contact device from the track, and a drum resetting mechanism adapted to be operated by the time indicating mechanism to reset the drum to its normal chime ringing position upon the completion of each hour.

3. In a clock the combination of time indicating, chime ringing and synchronizing mechanisms, said chim ringing mechanism consisting of a series of devices for sounding the hours and fractions thereof, a chime drum, pins on the chime drum adapted to actuate the sounding devices when the drum is rotated, and means for rotating the drum a number of complete rotations during each hour, and said synchronizing mechanism comprising a track consisting of convolutions located at one end of the drum, a contact device mounted on the drum, adapted to engage the track during rotation of the drum with the pins in operative relation with the sounding devices, and to be dis engaged therefrom after completion of op erative relation of the pins with the sounding devices, and means for shifting the drum to stop the ringing of the chime, upon disengagement of the contact device from the track, to move the pins from operative relation with the sounding device.

4. In a clock the combination of time indicating, chime ringing, and synchronizing mechanisms, said chime ringing mechanism consisting of a series of devices for sounding the hours and fractions thereof, a chime drum, pins on the drum adapted to actuate the sounding devices when the drum is rotated, and means for rotating the drum a number of complete rotations during each hour, and said synchronizing mechanism comprising a track consisting of convolutions located at one nd of the drum, a contact device mounted on the drum, adapted to engage the track during rotation of the drum with the pins in operative relation with the sounding devices, and to be disengaged therefrom after completion of operative relation of the pins with the sounding devices, means for shifting the drum to stop the ringing of the chime, upon disengagement of the contact device from the track, to move the pins from operative relation with the sounding devices, and a drum resetting mechanism adapted to be operated by the time indicating mechanism to reset the drum to its normal position with the pins in operative relation with the sounding devices, said resetting mechanism being operative upon the completion of each hour.

5. In combination in a clock, a time indieating, a chime ringing, and a synchronizing mechanism, said chim mechanism consisting of devices for sounding the hours and fractions thereof, pins on said drum adapted to actuate the devices for sounding thefractions of the hour, second set of pins on said drum, adapted to actuate the devices for sounding the hour, said pins being brought into operation a series of times in sounding the multiple quarters, and means for rotating the chime drum the proper number of complete rotations during each hour to complete the sounding of the chime, said second set of pins normally being out of operative relation with the hour sounding devices when the first set of pins is in normal operative relation with the fractional hour sounding devices, and vice versa, and said synchronizing mechanism consisting of a track having a primary and secondary portion located in different planes, a contact finger mounted on the drum, adapted to engage the primary portion of the track during fractional hour sounding rotation of the chime drum, and to occupy the secondary portion of the track upon completion of the fractional hour sounding rotation of the nisms, said chime mechanism consisting of devices for sounding the hours and fractions thereof, pins on said drum adaptedto actuate the devices for sounding the fractions ofthe hour, a second set of pins on said drum, adapted to actuate the v devices for sounding the hour, said pins being arranged to necessitate more than one complete rota: tion of the drum to complete the sounding of the chime Within each hour, stops spaced apart for controlling the motion of the drum for each fractional hour movement thereof, and a second stop spaced from the first mentioned stops longitudinally and peripherally of the drum,adapted to stop rotation of the,

drum after hour sounding movement there of, and means for rotating the chime drum the proper number of times vduringv each hour to complete the sounding of the chime, said second set of pins normally being out of operative relation Withthe hour sounding devices when the first set of pins is in normal operative relation with the fractional hour sounding devices, and vice versa,

stop levers operatively associated with the tlme lndicatlng and chime ringing mechanisms, whereby the time indicating mechanism Will place said levers in position to be acted upon said first mentioned stops to stop the rotation of the drum during fractionalv hour rotation thereof, said synchro-.

nizing mechanism consisting of a track having first, second and third portions located in different planes, a contact finger mounted on the drum, adapted to engage the first portion of the .tracleduring fractional hour sounding rotation of the chime drum, adapted to occupythe second portion of the track during hour sounding rotation of the chime drum, and to occupy the third portion of the track after completion of hour sounding rotation of the chime drum, means for shifting the drum upon change of position of the contact finger from the first to the second portion and from the second to .the third portion of the track, and a drum resetting mechanism adapted to be operated by the time indicating mechanlsm to reset the drum to its normal fractional hour sounding posi- Lea -r123 tion after completion of its rotation-While occupying the third track portion. position.

7.v A clock comprising a time indicating mechanism, a chime ringing mechanism, a synchronizing mechanism, a means operatively connected With the time indicating and synchronizing mechanisms, adapted to permit independent adjustment of the .hour and minute hands of the time indicating mechanism without, destroying the synchros nism betw een the time indicating mechanism and the chime ringing mechanism established by said synchronizing mechanism.

8. A, cloclecompi'ising, a time indicating mechanism, a chime ringing mechanism,a synchronizing mechanism, and means con nected Withthe time indicating mechanism and the synchronizing mechanism, adapted to permit independent adjustment of the hourand minute hands of the tim indicating mechanism Without destroying the synchronism between the time indicating mecha nism and the chime ringing mechanism es; tablished by said synchronizing mechanism, said synchronizing mechanism consistingof a track located at one end of the drum and a contact device mounted on the drum, adapted to engage the track during chime ringing rotation of the drum and to be dis en aged therefrom. upon completion of chime ringing rotation of the drum.

9.,A clockcomprising a time indicating mechanism, a chime ringing mechanism, a synchronizing mechanism, a means operatively. connected With the time indicating and synchronizing mechanisms, adapted to permit independent adjustment of the hour and minute hands of the time indicating mechanism Without destroyingthe synchro nism between the time indicating mechanism and the chime ringing mechanism es tablished by said synchronizing mechanism, said chime mechanism consisting of a chime drum and means for rotating the drum a number of times during each hour, said syn chronizing.mechanism consisting of a track located at one end of the drumcand consistingot a series of convolutions, and a contact device mounted on the drum, adapted toengage the track during chime ringing rotation of the drum and to be disengaged therefrom upon completion of chime ringing rotation of the drum.

10. A clock comprising a time indicating mechanism, a chime ringingand hour striking mechanism, a synchronizing mechanism, said chime ringing and hour striklng mechanism consisting of a chime drum and means for rotating the chime drum a number .of complete rotations during each hour, said synchronizing mechanism consistingnof a track located at, one end of the drum and consisting of a series of C011VOl11t1OI1 S,,{L.COI1- tact device mounted on the drum, adapted to engage the track during chime ringing rotation of the drum and to be disengaged therefrom upon completion of chime ringing rotation of the drum to strike the hour, a tripping and releasing device adapted to trip the chime ringing and hour striking mechanism previous to the completion of predetermined fractions of the hour and to release the chime ringing and hour striking mechanism upon completion of said fractions, and means adapted to position said device difierently previous to the completion of each hour to trip and to permit releasing of said chime ringing and hour striking mechanism upon completion of each hour, whereby the hour chime will be rung before said contact device is disengaged from the track and the hour strike will be struck after disengagement of the contact device from said track.

11. A clock comprising a time indicating mechanism, a chime ringing and hour striking mechanism, a synchronizing mechanism, means connected with the time indicating and synchronizing mechanisms adapted to permit independent adjustment of the hour and minute hands of the time indicating mechanism without destroying the synchronism between the time indicating and chime ringing mechanisms established by said synchronizing mechanism, said chime ringing and hour striking mechanism consisting of a chime drum and means for rotating the chime drum a number of times during each hour, said synchronizing mechanism consisting of a track located at one end of the drum and consisting of a series of convolutions, a contact device mounted on the drum, adapted to engage the track during chime ringing rotation of the drum and to be disengaged therefrom upon completion of chime ringing rotation of the drum, a tripping and releasing device adapted to trip the chime ringing I and hour striking mechanism previous to the completion of predetermined fractions of the hour and to release the chime ringing and hour striking mechanism upon completion of said fractions, and means adapted to position said device differently previous to the completion of each hour to trip and to permit releasing of said chime ringing and hour striking mechanism upon completion of the hour, whereby the hour chime will be rung before said contact device is disengaged from said track and the hour strike will be struck after disengagement of the contact device from the track and upon completion of the hour chime.

12. A clock comprising time indicating, chime ringing, and synchronizing mechanisms, said chime ringing mechanism consisting of a chime drum and means for rotating the chime drum a number of complete rotations during each hour, and an automatic means for adjusting the chime mechanism after the completion of said hourly rotations of the chime drum.

In testimony whereof, we have hereunto subscribed our names this 12th day of December, 1916.

WALTER J. HERSCHEDE. CHARLES COHAN.

Witnesses:

WALTER F. MURRAY, W. THORNTON BOGERT.

Copies of this paten may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. 0.

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