US2211426A - Electric alarm clock - Google Patents

Description

All@ 13, 1940 R. E. HuTcHlNsoN 2,211,425

ELECTR I C ALARM CLO CK Filed July 10, 1939 3 Sheets-Sheet l Mpix@ lg- 13g 1940 Rf E. Hu'rcHlNsoN 2,211,426

ELECTRIC ALARM CLOCK l Filed July 10. 1959 5 Sheets-Sheet 2 Allg- 13, 1940 R. E. HuTcHlNsoN 2,211,426

ELECTRIC ALARM CLOCK Filed July 1o, 19:59 s sheets-sheet s Patented Aug. 13, 1940' UNITED STATES PATENT GFFICE 2,211,426 ELECTRIC ALARM CLOCK Raymond E. Hutchinson, Bristol, Conn., assignor y to The Sessions Clock Company, Forestville,

Conn., a corporation of Connecticut Application July 10, 1939, Serial N0. 283,540

n 8 Claims.

arrangement of the alarm-mechanism and alsoV of the several other units constituting the operating mechanism of an electric alarm clock.

One oi' the objects of the present invention is to provide a superiorly constructed and arranged electric alarm clock in which the parts comprising the alarm-mechanism thereof are grouped together and consolidated rearwardly of the other operating elements of the clock and in such manner as to secure desirable non-cramping relationship of the parts, together with compact organization thereof.

, Another object of this invention is to provide an improved electric alarm clock having the parts thereof constituting propelling-means, powertransmission means, and alarm-mechanism, respectively organized in compact relationship and as individual units, the said units being also compactly related to each other and in such manner as to avoid cramping of the parts of a unit to accommodate parts of another of the A units of the clock.

Still another object of the present invention is to secure a superior electric alarm clock, in which the electric motor thereof is arranged between a time-train and alarm-mechanism of the clock, and spaces the said alarm-mechanism rearwardly of the said time-train, the parts of the respective units being organized in compact noncramped relation and being thereby accessible for repair or replacement, or for cleaning, olling or similar purposes.

' A further object of this invention is to provide a superior electric alarm clock having a timetrain susbstantially enclosed in and supported by a movement-frame and disposed forwardly of an intermediately-arranged electric motor, the said clock also having alarm-mechanism disposed rearwardly .of said electric motor, and the said `units being directly or indirectly supported on a forwardly-positioned member of the clock, which also serves as a mounting-plate for the dial of the clock.

Still a further object of the present invention is to provide an improved electric alarm clock in which the parts comprising cach of several operating-units may be constructed and assembled before the said units are brought into organized relation to each otherand whereby economical production and assembly are secured and facilitated.

Another object of the present invention is to provide a superior electric alarm clock having the respective operating-units thereof arranged in compact yet non-cramped relation and in which protection of the said parts against damage or breakage is secured, particularly with respect 6 to the time-trainand the alarm-mechanism of the clock.

With the above and other objects in view, as will appear to those skilled inthe art from the present disclosure, this invention includes all l0 thereof, the alarm-mechanism being shown in 20 operating position;

Fig. 3 is a top or plan view thereof partly in section;

Fig. 4 is an underside or bottom-plan view thereof;

Fig. 5 is a fragmentary sectional view taken on the lin 5 5 of Fig. 4;

Fig. 6 is a similar view taken on the line 6 8 of Fig. 2;

Fig. 7 is a perspective view of the hammer; and 30 Fig. 8 is a plan elevational view of the bell, detached.

The particular electric alarm clock herein chosen for' the purpose of illustrating the present invention includes a dial I0 and pointer-mem- 35 bers, including a seconds-pointer Il, a minutepointer I2 and an hour-pointer I 3, all of which are arranged to be driven about the dial l0 by means to be more particularly described hereinaiter.

'Ihe dial i0, asis especially well shown in Figs. 3 and 4, is carried on the front face of a dialback plate I4, which preferably is formed to provide a central portion i5 and an outer flangeportion i8, lying in substantially the same plane, 45 the said portions respectively engaging the central portion and the outer portion of the dial I0. The dial-back plate I4 is also provided with a central opening i1, arranged to be aligned with a central opening IB oi the dial i0 for the passage 50 spaced rearwardly oi the dial IB and is provided 55 'with rearwardly-depressed mounting-recesses 20.

To the rear of the dial-back plate.l I4 a propelling-unit is mounted, which unit, in the embodiment of the invention illustrated. is a selfstarting synchronous electric motor, generally designated by the reference character 2|, for driving a time-train indicated as a whole by the reference character 22 and disposed forwardly of the electric motor 2i and intermediate the latter and the above described dial-back plate I4.

For the purposes of the presen't invention, the

electric motor 2| need be put briefly described.

Electric current from a suitable source may be supplied to leads 23 which pass through openings 24 provided in a cup-shaped pole-piece 25 and connect with an energizing-coil, not shown. The said cup-shaped pole-piece extends rearwardly and cooperates with a plate-like pole-piece 26. The pole- pieces 25 and 28 are provided with salient poles l21 and 28, respectively, which, .as is clearly shown in Fig. 2, are arranged in interflttlng relation. Preferably, certain of the salient poles 21 are shaded by means of suitably-pierced shading-rings 28 formed of copper or the like, which are permanently organized with the cup. shaped pole-piece 25 to produce a. rotating field effect and secure a self-starting synchronous motor-structure.

Arranged to be acted on by the rotating field of the motor is a rotor 3i! having a forwardlyextending flange 3i which. overlies and turns about the intertted salient poles 21 and 28. The rotor 30 is rigidly secured to a collet 32 and the said collet, in turn, is rigidly secured to the rear end of a rotor-shaft 33.v Collet 32, which is rotatable with the rotor 30, extends rearwardly therefrom and carries a double-lift hammeractuating cam 34, the purpose of which will more fully hereinafter appear, and the rotor-shaft 33, which is rotatable with'the collet 32, extends forwardly therefrom, through the motor structure and projects through the forward end wall f the cup-shaped pole-piece 25.

As has been mentioned, the electric motor 2|, just above described, is arranged to drive the time-train 22 disposed forwardly of the said motor and between the same and the dial-back plate I4. The time-train 22, as shown, is mainly organized between and within spaced apart front land rear movement-plates and 36 which are of substantially similar construction and constitute a movement-frame for supporting and enclosing the said time-train. The movement- plates 35 and 36 are coupled in spaced relationship by pillars 31, the said movement-frame being supported as a whole on the dial-back plate i4 by means of the externally-threaded forward ends of the pillars 31 which pass through the front movement-plate and through the offset-portion I3 of the dial-back plate I4 and enter the mounting-recesses movement-plate 35 and the rear face of the dialback plate I4, the pillars 31 are provided with spacing-nuts 38, and the extreme forward ends of the pillars 31, located in the mounting-recesses 20, are provided with holding-nuts 39 for rigidly securing the movement-frame to the dial-back plate I4.

The movement-frame, i. e., the movement- ' plates 35 and 36 and the pillars 31, supported as described on the dial-back plate I4, provides sup- 'port for the electric motor 2 I, suitable means 'such as stud-bolts 40 projecting from the forward end-wall of the cup-shaped pole-piece 25 through the rear movement plate 36 being provided with 2U thereof. Between the front.

nuts 4I for rigidly securing the motor 2I in place on and at the'rear of the said rear movementplate 36. The rotor-shaft 33 of the motor also eX- tends through the rear movement-plate` 35 and projects into the space between the movementplates 35 and 36 of the movement-frame and cooperates with and forms part of the time-train 22, which is mainlyorganized Within the said 4 movement-frame.

Preferably, the time-train 22 comprises a worm-drive-and-spur-gear assembly, the rotor- 'shaft 33, projecting within the movement-frame,

arms -45 secured to the rear movement-plate l 35 Vand projecting forwardly into the space between the movement- plates 35 and 36. Adjacent the end opposite the first worm-wheel 43, the shaft 44 has rigidly mounted thereon a second worm 46 which, in turn, meshes with and drives l a second worm-wheel 41 rotating about an axis parallel with but eccentric with respect to the axis of the rotor-shaft 33 and Aperpendicular to the axis of the first worm-wheel 43 and the second worm 45.

'I'he second worm-wheel 41 is rigidly secured on a center-arbor or seconds-shaft 48 extending between the movement- plates 35 and 36 yand journaled therein, the said center-arbor also projecting through the central openings I1 and I8 of the dial-back plate I4 and the dial IIJ, respectively, and carrying the seconds-pointer II at the outer end thereof. Y

At the rear end of the center-arbor 48 a spurpinion 43 is rigidly attached thereto to engage with and drive a spur-wheel '50 rigidly secured on a shaft 5I, the last also bearing in the movement- plates 35 and 36. The shaft 5I is also provided With a spur-pinion 52 which meshes with a minute-wheel 53 and the said minute-wheel is frictionally mounted on a hub 54 which, in turn, is mounted with freedom for rotation on the center-arbor 48. The hub 54 is normally coupled to the minute-wheel 53 for rotation therewith, but with freedom for being turned with respect thereto, by a friction-washer 55 which may be held in placeon the hub 54 by means of a collet 56. The frictionally-coupled hub 54 is provided with a minute-sleeve 51 which extends through the front movement-plate 35 and also projects through the central openings I1 and I8 of the dial-back plate I4 and the dial I8, and has the minute-pointer I2 secured thereto at the outer end thereof.

Immediately forwardly of the front movementplate 35 and between the same and the dial-back plate I4, the minute-sleeve 51 is provided with a spur-pinion 58 rigidly mounted thereon and meshing with and driving a suitably mounted dial-wheel 59. The dial-Wheel 59 has a dialpinion 60 rigidly secured thereto, and the latter engages with and drives an hour-wheel 6I rigidly 'carried on an hour-sleeve 62. In turn, the hoursleeve 62 is mounted with freedom for rotation o'n the minute-sleeve 51 and projects forwardly' through the openings I1 and I8 in the dial-back plate I4 and the dial I0, and carries the hourpointer I3 at the outer end thereof.

Also positioned between the front movementplate 35 and the dial-back plate I4 and driven by the said hour-wheel 6I, is a spur-pinion 63 which meshes with and drives an alarm-control spur-wheel M rigidly mounted on an alarmcontrolI shaft 8B for the purpose as will hereinafter appear.

The alarm-mechanism is generally designated by the reference character 88 and is mounted at the rear of the electric motor 2|, being spaced by the latter rearwardly of the time-train 22. As shown, the said alarm-mechanism includes an al'arm-mounting-plate 61, which isspaced rearwardly of the motor 2| and is preferably supported from the dial-back plate i4 by means or' two or more pillars 88. The pillars 88 are each threaded at the respective opposite ends thereof, the forward ends of the pillars extending through the offset-portion I9 of the dial-back plate it and each being provided with a nut 69 (see Fig. 4) for rigidly securing the respective pillars in place on the dial-back plate I4. From the said dialback plate the pillars 68 extend rearwardly past the time-train 22 and the electric motor 2|, the rear ends thereof extending through the alarmmounting plate 67 which is rigidly secured thereto by means oi securing-nuts 'ill to hold the said alarm-mounting plate in spaced relationship with respect to the motor 2i.

The above mentioned alarm-mounting' plate @i has a bracket 'il riveted thereon, the said bracket carrying a bell l2 which is secured to the bracket 'ii by a screw 'M and nut 275.

Cooperating with the lbell striker, preferably formed of sheet metal, which is generally designated by the reference character 'it and includes a hammer-body il and an integral resilient hammer-arm 173. The hammer it is also carried by the alarm-mounting plate t?, the said hammer being pivotally mounted on a stud i3 projecting :from the front face of the said alarm-mounting plate and passing through an opening all in the hammer-body l?, whereby the hammer it is pivotally mounted onthe alarm-mounting plate t? between the latter and the rear of the electric motor 2|.

in its preferred form, shown particularly well in Fig. 7, the hammer 'I8 is bent to provide an endportion di which is angularly related to the hammer-body i1. The hammer-arm it, which is mainly separated from the said hammer-body, is also bent to provide an L-shaped end-portion 82. The L-shaped portion 82 parallels two angulariy-related sides of the end-portion iii of the hammer-body l1, one of the legs of the L-shaped portion 32 and a third side of the end-portion 3| being integrally united. The hammer 'i6 is thus provided with a hammer-army i8 having capacity for ile-Xing and vibrating with respect to the hammer-body Tl, and thesaid hammer-arm, at the outer free end thereof opposite its union with the hammer-body 11, is provided with a hammerhead or striker-head 83,-which may be welded, soldered or brazed thereto, but which is preferably formed integral with the hammer-arm i8."

As will be understood, it is intended that the hammer-head 83 strike the bell 12 to ring the same and that this operation take place only on selected occasions. Accordingly, the hammerbody 'l1 is provided with a rearwardly-offset arm 84 which carries a forwardly-projecting actuator-pin 85, and the said actuator-pin, as will presently appear, may be brought into position to engage the hammer-actuating cam 3l rotating continuously at the rear of the electric motor 2|, to swing the hammer 16 with respect to the bell 12. The hammer-body'l'l is also provided with a rearwardly-extending finger 86 which is engagedy by a sheet-metal lhammerll2 is a hammer or spring 81 secured to a stud 8l projecting from the front face of the alarm-mounting plate l1, the said spring 81 constantly urging the hammer 18 into engagement with the hammer-actuating cam 34. v

The hammer-body 'H is also provided with a cam-stud 89 adjacent the end-portion 8|, which cam-stud projects rearwardly therefrom and is arranged to coact with a disk-like alarm-control cam 90 carried by the alarm-control shaft 85 before referred to, whereby the said alarm-control cam is operable from the herein described timetrain 22. The alarm-control shaft has its forward end journaled in the dial-back plate Il and 'extends rearwardly therefrom, like the mounting-pillars 68, past the time-train 22 and the electric motor 2|, and adjacent its rear. end the said 'alarm-control shaft passes through a hub fil which bears in the alarm-mounting plate tl. The hub Si projects at the front and at the rear of the alarm-mounting plate Si, and its forward end is spun over to rigidly secure the said alarmcontrol cam 9@ thereto between the said alarmmounting plate and the electric motor 2i. At its rear end, the hub tl is similarly spun over to rigidly secure a setting-disk 92 thereto, the said setting-disk being provided with a rearwardlyprojecting setting-'lnger QB, which is preferably formed integral therewith.

The hub @il having the setting-disk t2 and the aiarm-controi cam Qt rigidly mounted thereon is frictionally coupled to the alarm-control shaft @i6 by a friction-washer 9S, which may be of spider-'fcrmand which bears on the rear face of the setting-disk 92,. The friction-washer 38, in turn, is engaged by the inner one of two nuts Q5, @t which are threaded on the reduced rear end ol the alarm-control shaft 65.

Thus, the hub Qi, with the setting-disk 0i and the alarm-control cam iii! rigidly secured thereto, may be rotated with respect to the alarmcontrai shait St, for the purpose of adjusting or setting the alarm-mechanism. The settinginger 93 may be grasped and turned and preferably cooperates with an index graduated to hours and intervals thereof, whichindex is not shown herein and which may be a separate wheel or disk, for example, or may be inscribed on the back of a casing.

More particularly, with respect to adjustment of the alarm-mechanism, the periphery of the alarm-control cam et, which may also together with the setting-disk S2, be turned with respect to the alarm-controlshaft S5, is provided with an alarm-release notch Sl therein, which may be caused to registerwith and receive the cam-stud t9 of the hammer 'i6 at any particular and deslred phase of the revolution of the alarm-control carn 9B caused by the operating time-train 22.

' Also arranged to act on the hammer 15, to position the same with respect to the above-described alarm-control cam 90. is an alarm-shut-oii' plunger 98. The shut-off plunger 98 and the operating positions thereof are clearly shown in Fig. 5, in which it will be observed that the said plunger is arranged to slide in a sleeve or bushing 99 which is mounted in the alarm-mounting plate B1 and extends forwardly and rear- Wardly thereof. At the rear of the said alarmmounting plate, 'the bushing 99 is provided with a transverse slot |00 which intersects the axial passage formed therein, the said slot receiving a spring |0| which is adapted to frictionally engage and cooperate with grooves |02 formed on the shut-ofi plunger 88 to hold the latter in either its on or oil positions. At its forward end, the plunger. 98 is provided with a conicaltip |03 which may be pushed into or pulled from 5 an aperture. |08 in the hammer-body 11, whereby the hammer 16 may be cammed away from the alarm-control cam 90, or may be released for operation. f

Assuming that the shut-off plunger 98 has been m :moved into its forward or on" position, shown in broken lines in Fig. 5, the conical-tip |03 will have entered the aperture |04 of the hammer- 1body 11 and will have causedfthe hammer 16 to shift about its pivot 19. In the shift of the 18 hammer 16 the actuator-pin 85 thereof will have been caused to be moved out .of the path of the continuously-rotated hammer-actuating cam 34. The shifting of the hammer 1'6 also moves the cam-stud 89 into a position where it 'will not a0 enter the notch 91 of the alarm-control cam 90.

Current from a suitable source is assumed to be entering the electric motor 2| by way of the leads 23, and the rotor 30 is being synchronously turned. The collet 32 and the rotor-shaft 33 accompany the rotor 30 in its turning movement and the double-lift hammer-actuating cam 34 also rotates continuously therewith. The continuous rotation of the said cam 34 is without effect on the hammer 16 as the actuator-pin 85 of I9 the said hammer has been moved out of the path thereof, but the rotation of the said rotor-shaft 33 is effective with respect to driving the timetrain 22.

By means of the rst worm 42 carried at the forward end of the rotor-shaft 33, located between the movement- plates 35 and 36, the hereinabove described worm-drive-and-spur-gear time-train 22 is driven to turn the center-arbor 48, the minute-sleeve 51 and the hour-sleeve 62,

19` and these, in turn, cause the seconds-pointer the minute-pointer |`2 and the hour-pointer I3 to revolve about the dial I0 at the respective rates of one revolution 'a minute, one revolution an hour, and one-twelfth of a revolution an hour.

Also rotating with the above-mentioned hoursleeve 82 is the hour-wheel 6|, which drives the spur-pinion 63, and the said spur-pinion engages with and drives the alarm-control wheel 64 and thereby the alarm-control shaft 65, on which the 8G said alarm-control wheel is rigidly mounted.

As the alarm-control shaft 65 turns, the hub 9| frictionally coupled thereto and the alarm-control cam 90 and the setting-disk 92 rigidly mounted on the hub 9|, also turn and these parts 55 also revolve at th'e rate of one-twelfth of a revolution an hour. The revolution of the said hub 9|, alarm-control cam 90 and setting-disk 92 will be without effect at this time, particularly as con- 65 be turned with respect to the index before referred to but not shown herein. The settingdisk 92 accompanies the setting-finger 93 in the said movement, as does the hub 9|, to which the setting-disk 92 is rigidly secured, and the alarm- 70 control cam 90 rigidly mounted on the hub 9|.

The parts just referred to, because of the frictional coupling provided by the friction-washer 94, turn with respect to the alarm-control shaft 65. A result of this movement is to-shift the u notch 91 of the alarm-control cam 90 to its proper to be engaged by, the periphery of the alarm-control cam 90, now being slowly driven by the alarm-control shaft 65 from the time-train 22.

As the said alarm-control cam 90 slowly rotates, the periphery thereof, engaging with the cam-stud 89, prevents the hammer 16 from swinging, under the urge of the spring 81, into position to bring its actuator-pin 85 into the path of the continuously-rotating hammer-actuating cam 34. When the rotation of the alarm-control cam 90 registers the notch 91 therein with the cam-stud 89 of the hammer 16, the latterresponds to the urge of the spring 81 to further swing the hammer 16 about its pivot to drop-the cam-stud 89 into the notch 91, to thus engage the actuator-pin 85 with the hammer-actuating cam 84.

inasmuch as the hammer-actuating cam 34 is provided with double-lift portions and its speed of rotation is several hundred revolutions a minute, the engagement of the actuator-pin 85 with the said cam will cause the latter to move the hammer 16 outwardly against the urge of the spring 81. The hammer 16, under the urge of the spring 81, will then be sharply returned to again be moved outwardly by the rapidly-rotating hammer-actuating cam 34. The described rapid back-and-forth oscillations of the hammer 16 cause the resilient hammer-arm 18 thereof to fiex and vibrate with respect to the hammer-body, which results in the hammer-head 83 rapidly and sharply striking against the adjacent wall of the bell 12.

At any time during the period in which the hammer 16 is oscillating as above described, this action of the hammer may be discontinued by pressing the shut-off plunger 98 inwardly to its on position, whereby the conical-tip |03 will enter the aperture |04 to shift the hammer 16 and the actuator-pin 85 away from the hammeractuating cam 34 and, more particularly, to move the cam-stud 89 out of the notch 91 of the alarmcontrol cam 90.

'I'he operation of the said alarm-control cam 90 may, of itself, bring about the discontinuance of the oscillations of the hammer 16. v This will occur when the shut-off plunger 98 has not been pressed to cause the cam-stud 89 to be withdrawn from the notch 91 for, as the alarm-control cam 90 continues to be slowly driven by the timetrain 22, the cam-surface of the said notch will cause the cam-stud 89 to gradually ride out of the notch 91 and up on the periphery of the alarm-control cam 90, to thus hold the hammer 16, with the actuator-pin 85 thereof, positioned out of the path of the hammer-actuating cam 34. However, under these conditions and'in order that the lapse of a twelve-hour period will not result in another operation of the alarm-mechanism, the shut-off plunger 98 is also to be pressed inwardly, whereby the hammer 18 is thereafter held out of operating position by the conical-tip of the said plunger 98 engaging in the hammerbody 11.

As will be apparent, the construction and arrangement of the parts herein shown and described are such as to secure the carrying out of the operations above set forth in a superior and more effective manner. It is found to be particularly desirable to mount the alarm-mechanism at the rear of the electric motor 2l, and that the said alarm-mechanism be separated by the said electricl motor from the forwardly-disposed time-train 222.

The parts comprising the several operatingunits, and especially the alarm-mechanism, may

be completely assembled independently of each other before being assembled in their respective positions to form a complete alarm clock structure. The parts comprising the respective units are compactly arranged, yet the relationship of the Darts and of the units is such that the desired compactness is secured without cramping. A feature of the arrangements is that provision is made for ready access to parts for inspection, repair, or replacement thereof, and at the same time the parts are assembled in protected relationship, whereby necessity for repair orxreplacement is substantially minimized. It is also of advantage to have the respective operatingunits, that is, the time-train 22, the electric motor 2l and the alarm-mechanism 68, all supported directly or indirectly on the plate Il. which also carries the dial l0 at the iront thereof.

The invention'may be carried out in other specific ways than those herein set forth without departing from the spirit and essentialcharacteristics of the invention, and the present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, and all changes coming within the meaning and equivalency range of the appended claims are intended to be embraced therein.

I claim:

1. An electric alarm clock comprising: a dialback. plate; a time-train; a movement-frame enclosing and supporting said time-train and mounted on said dial-back plate; an electric motor located at the rear of said movementframe and carrying a continuously-rotatable hammer-actuating cam at the rear thereof, the said electric motor also including a rotary member operatively connected at its forward end with said time-train; time-indicating mechanism including rotary means operatively connected with said time-train; and alarm-mechanism including an alarm-mounting plate mounted at the rear of said electric motor, a belly carried by said alarm-mounting plate, and a hammer pivoted thereon, the said alarm-mechanism also including an alarm-control cam operable from said time-train and engageable with said hammer to shift the same into and out of the path of the continuously-rotatable hammer-actuating cam; the said movement-frame and time-train being mounted at the front of said electric motor and between the same and the said dial-back plate, and the said alarm-mechanism being mounted at the rear of the electric motor and being spaced thereby rearwardly of the said movement-frame and time-train.

2. An electric alarm clock comprising: a dialbaclr plate; a time-train; a movement-frame enclosing and supporting said time-train and mounted on said dial-back-plate; an electric motor located at the rear of said movement-frame and carrying a continuously-rotatable hammeractuating cam at the rear thereof, the said elec- 5 tric motor also including a rotary member operatively connected at its forward end with said time-train; time-indicating mechanism including rotary means operatively connected with said time-train; and alarm-mechanism including an alarm-mounting plate, mounting-pillars secured to said dial-back plate and extending rearwardly across said movement-frame, time-train, and electric motor, the said mounting-pillars being secured to the said alarm-mounting plate to support the same on said dial-back plate and at the rear of said electric moto a bell carried by said alarm-mounting plate, and a hammer pivoted thereon, the said alarm-mechanism also including an alarm-control cam operable from said time-train and engageable with said hammer to shift the same into and out of the path of the continuously-rotatable hammer-actuating cam; the said movement-frame and time-train being mounted at the front of said electric motor and between the same and the said dial-back plate, and the said alarm-mechanism being mounted at the rear of the electric motor and being spaced thereby rearwardly of the said movement-frame and time-train.

3. An electric alarm clock comprising: a dialback plate; a time-train; a movement-frame enclosing and supporting said time-tram and mounted on said dial-back plate; an electric motor located at the rear of said movement-frame and carryinga continuously-rotatable hammeractuating cam at the rear thereof, the said electric motor also including a rotary member operatively connected at its forward end with said time-tram; time-indicating mechanism including rotary means operatively connected with said time-train; and alarm-mechanism including an alarm-mounting plate, mounting-pillars secured to said dial-back plate and extending rearwardly across said movement-frame, timetrain, and electric motor, the said mounting-pillars being secured to the said alarm-mounting plate to support the same on said dial-back plate and at the rear of said electric motor, a bell carried by said alarm-mounting plate, and a hammer pivoted thereon, the said alarm-mechanism also including an alarm-control shaft journaled at its forward end in the said dial-back plate and operable from said time-train, the said. alarm-control shaft extending rearwardly to and throughA the said alarm-mounting plate, an alarm-control cam frictionally coupled on said alarm-control shaft adjacent the said alarmmounting plate and engageable with said hammer to shift the same into and out of the path 0i the continuously-rotatable hammer-actuating cam; the said movement-frame and time-train being mounted at the front of said electric motor and between the same and the said dial-back plate, and the said alarm-mechanism being mounted at the rear of the electric motor and being spaced thereby rearwardly of the said movement-frame and time-train.

4. An electric alarm clock comprising: a dialbaclr. plate; a time-train; a movement-frame enclosing and supporting said time-train and mounted on said dial-back plate; an electric motor located at the rear of said movementframe and carrying a continuously-rotatable hammer-actuating cam at the rear thereoi'rthe said electricv motor also including a rotary member operatively connected at its forward end with said time-train; time-indicating mechanism including rotary means operatively connected with said time-train; and alarm-mechanism including an alarm-mounting plate mounted at the rear of and in spaced relation to .said electric motor, a.

bell carriedby said alarm-mounting plate, and a hammer pivoted on the forward face of said Ialarm-mounting plate and positioned between the same and therear of said electric motor, the

- of said electric motor and between the same and f'n/iounted on said dial-back plate; an electric motor located at the rear of said movementframe and carrying a continuously-rotatable hammer-actuating cam at the rear thereof, the said electric motor also including a rotary member operatively connected at its forward end with said'time-train; time-indicating mechanism including rotary means operatively connected with said time-train; and alarm-mechanism including an alarm-mounting plate, mounting-pillars secured to said dial-back plate and extending rearwardly across said movement-frame, time-train and electric motor, the said mounting-pillars being secured to the said alarm-mounting plate to support the same on said dial-back plate at the rear of and in spaced relation to said electric motor,- a bell lcarried by said alarm-mounting plate, and a hammer pivoted on the forward face of said alarm-mounting plate and positioned between the same and the rear of said electric motor, the said hammer being shiitable to engage Y with said continuously-rotatable hammer-actuating cam, the said alarm-mechanism also including an alarm-control cam operable from said time-train, the said alarm-control cam also being mounted between the said alarm-mounting plate and the rear of said electric .motor and being engageable with the said hammer to shift the same into and out of the path of said continuouslyrotatable hammer-actuating'cam; the said movement-frame and timetrain being mounted at the front of said electric motor and between the same and said dial-back plate, and the said alarm-mechanism being mounted at the rear of. the electric motor and being spaced thereby rearwardly of the said movement-frame and timetrain.

6. An electric alarm clock comprising: a dialback plate; a time-train; a movement-frame enclosing and supporting said time-train and mounted on said dial-back plate; an electric motor located at the rear of said movement-frame and carrying -a continuously-rotatable hammeractuating cam at the rear thereof, the said electric motor also including a rotary member operatively connected at its forward end-with said time-train; time-indicating mechanisml including rotary means operatively connected with said time-train; and alarm-mechanism'including an alarm-mounting plate, mounting-pillars secured to said dial-back plate and extending rearwardly across said movement-frame, time-train and electric motor, the said mounting-pillars being secured to the said alarm-mounting plate to support the same on said dial-back plate at the 5 rear of and in spaced relation to said electric motor, Aa bell carried by said alarm-mounting plate, and a hammer pivoted on the forward face of said alarm-mounting plate and positioned between the same and the rear of said electric l motor, the said hammer being shiftable to engage with said continuously-rotatable hammer-actuating cam, the said alarm-mechanism also including an alarm-control shaft journaled at its forward end in the said dial-back plate and opl erable from said time-train, the said alarm-control shaft extending rearwardly to and through the said alarm-mounting plate, an alarm-control cam frictionally coupled on said alarm-control shaft, the said alarm-control cam also being mounted between the said alarm-mounting plate .and the rear of said electric motor and being engageable with the said hammer to shift the same into and out of the path of. said continuously-rotatable hammer-actuating cam; the said movement-frame and time-train being mounted at the front of said electric motor and between the same and said dial-back plate, and the said alarm-mechanism being mounted at the rear oi the electric motor and being spaced thereby rearwardly of the said movement-frame and timetrain.

7. An electric alarm clock comprising: a dialback plate; a time-train; a movement-frame enclosing and supporting said time-train and mounted on said dial-back plate; an electric motor located at the rear of said movement-frame and carrying a continuously-rotatable hammeractuating cam at the rear thereof, the said electric motor also including a rotary member operatively connected at its forward end with said time-train; time-indicating mechanism including rotary means operatively connected with said time-train; and alarm-mechanism including an alarm-mounting plate, mounting-pillars secured to said dial-back plate and extending rearwardly across said time-train and movement-frame and across said electric motor, the said mountingpillars being secured to said alarm-mounting plate to support the same on said dial-back plate '50 and at the rear of said electric motor, a bell carried by said alarm-mounting plate, and a cooperating hammer, the said alarm-mechanism also including an alarm-control cam operable from said time-train," the said hammer including a hammer-body pivoted on said alarm-mounting plate, and a hammer-'arm integrally united at one end thereof with the hammer-body and having capacity for flexing with respect thereto to provide a vibrating hammer-arm, the said hamw mer-body being provided with a cam-pin and with an actuator-pin, and the said alarm-control cam being provided with a notch for receiving the said cam-pin whereby the hammer is shiftable to turned alternately into positions to engage a portion of the hammer with a continuouslyrotating member of the electric clock :and to cause the` said hammer-head to strike a bell of alarm mechanism of the electc clock, and being also constructed and arranged to be shifted about its pivotal mounting out of the path of the continuously-rotating member of the electric clock by the engagement therewith of a manuallyl0 operable transversely-movable shut-off member,

and the said hammer-arm being also provided with portions thereof bent to extend in transverse directions parallel to and in spaced relation to said singularly-related end-portion of said hammer-body and being united with the said angularly-related end-portion of the hammer-body, the said hammer-arm having capacity for flexing and Vibrating with respect to the said hammer-body.

RAYMOND E. HUTCHINSON.

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