US1331276A - Alarm-clock - Google Patents

Description

A. P. MYER.

ALARM CLOCK. APPLICATION man OCT. 30. Hill.

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ALARM CLOCK.

APPLICATION FILED OCT. 30. I917.

1,331,276. Patented Feb. 17,1920.

2 SHEETS-SHEET 2.

UNITED STATES PATENT OFFICE.

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Specification of zetters l'ateat.

Patented Feb. 17, 1920.

Application filed Octoher 30, 181?. Serial No. 199,239.

f '0 all whom it may concern:

Be it known that I, ALBERT P. Mrnn, a

citizen of the United States, resident of Minneapolis, county of Hennepin, State of Minnesota, have invented certain new and useful Improvements in Alarm-Clocks, of which the following is a Specification.

The object of my invention is to provide a time piece in which the main spring operates both the clock and the alarm mechanism and in using the alarm it is only necessary to set the indicator hands for the desired hour to insure its operation when that hour arrives, the winding of an alarm spring usually incident to clocks of this type as generally constructed being entirely avoided and thereby a considerable saving is effected in the number of parts required and the first cost of the clock.

A further object is to provide a timepiece of this type in which provision is made for shifting the contact points of a thermostat at a predetermined hour 013 the day, governed by the position of the indicator hands of the alarm dial.

Other objects of the invention Wlll appear from the following detailed description.

The invention consists generally in various constructions and combinations, all

as hereinafter described and particularly pointed out in the claims.

In the accompanying drawings forming part of this speclfication,

Figure 1 is a rear view of a clock embodyin my invention,

ig. 2 is a sectional view on the line 22 of Fig. 3, p

Fig. 3' is a side view, partially 1n section, through the mechanism of the clock,

Fig. 4 is a detail view on the line 44 of Fig. 2,

Fig. 5 is a similar view showing the alarm attachment in its released positing,

Fig. 6 is a detail view, showing the en gagement ofthe alarm pinion with the gear of the clock mechanism.

In the drawing, 2 represents a clock casing, 3 and 4the minute and hour hands respectively and 5 a train of gears through which the hands are operated in the usual way. 6, 7 and 8 are partitions within the clock casing, arranged in parallel relation and spaced apart and 9 is a suitable cap or cover for the rear end of the casing. A post 10 is mounted in the partitions 6, 7 and'.8

and secured thereto is a main spring 11 arranged within a drum 12 that is loosely mounted u n the post 10. A car 13 is secured to t e drum 12 throng which the train of gears 5 is driven. A collar 14 is secured on said post on the opposite side of said drum and is provided with a flange 15. Mounted on the collar 14 is a ratchet wheel 16 and a gear 17 has a flange that is loosely mounted on the collar 14 etween a flange 18 and the wheel 16. A spring-pressed pawl 19 is secured to the flange 18 and engages the teeth of the ratchet wheel 16. The gearl? drives a gear 20 which meshes with a pinion 21 on a shaft 22 and a pinion 23 on a shaft 2-1 is also driven from the ear 20 (see Fig. 2). A gear 25 is driven rom' the gear 20 and engages a pallet 26 on which a rod 27 is mounted in position to engage the bent end portion 28 of a spring 29 and thereby be held against vibrating through the movement of the pallet. In clock construction this rod 27 may carry the alarm hammer and when the pallet is released the arm will be vibrated to contact with the bell and sound the alarm. A s ring 29 is secured at one end to the partition 7 while its opposite end is free to move back and forth to lock or release the vibrating rod 27. The post 22 is extended through the wall 9 and 1s provided with a crank arm 30 which may be utilized for shifting the contact points of a thermostat or for closing any leased, I provide a yoke 31 on the post 24 having inwardly projecting lugs 32 in the path of hands 33 and 34 mounted on a post 35. Secured to said post is a disk 36 havin graduations thereon to indicate the hours 0 the day and also the letters A. M. and P. M. The indicator hands are properly s aced on the disk and secured by a nut 37. he post 35 is provided with a gear 38 that is driven from the train of gears 5, as shown in Fi 3, the gearing being such-that the post will make one complete revolution in twenty-four hours, and during this time the hands 33 and 34 will each contact with one of the lugs 32 Fig. 2, it will be noted the rotated so that one of its teet in inwardl projecti lugs provided with tageredsur aces 40." oke 39 ismounted so that its tapered su aces will contact with the spring 29 and move it from the dotted line position in Fig. 4 to the full line position in the same figure, where its end portion 28 will be in the path of the rod 27 and will check vibration of said rod and thereby stop the operation of the gears.

The post 24 and the arts mounted thereon have a limited free om of movement to allow the yoke 39 to release the spring 29 and this movement I accomplish by providing comparatively large spaces between the teeth of the gear 20 to receive the teeth of the pinion 23, so that the said inionwith the post 24 may rock a limited istance between theteeth of the ar 20 suflicient to release the spring 29. is is plainly shown in Fig. 6 where, upon cpmparison with fitti into the recess between the adjacent teeth 0 the gear 20 has moved from one side of the space to the other and during such movement ,the yoke 39 has been oscillated sufii'ciently to disen ge its surface 40 from the spring 29 and a low this s ring to assume the sition shown by dotte lines in Fig. 4 an release the rod 27. This movement of the yoke 39 will take fplace when the yoke 31 is engaged by one o the. hands 33 or 34 and when released the yoke 39 will make a half revolution or until one of the beveled surfaces 40 engage the sprin 29, when the said spring wi l flexed an forced from the position indicated by dotted lines in F 4 to the full line position in the same gore, and when moved to this full-line position the end 28 will be in the path of the vibrating rod 27 and will check the movement of the same and through it the operation ofgthe gears will be arrested.

In operation, when one of the hands 38, 34 comes in'cont act with the bent end of the adjacent arm 32 the shaft 24 is partially rotated and carries the bent end 40 from holding contact with spring arm 29 so that said a will spring to the ositionshown in dotte lines in Fig. 4 and us release the pallet arm 27 and permit the alarm to be sounded during the period'of time that the bent end of the other arm 39 is being brought into contact with the spring arm 29 and press it so as to brin its bent end 28 intothe path of vibration o the pallet arm 27 and thus check the. vibration of that arm and the sounding of the alarm. Duringltlglis pegiod as een the other arm ofthe yoke brought into to be enga osition to have its bent end by, the dial hand when the latter has arrived at the point on its scale dial to again sound the alarm and so on successively. .The operation indetail will be understood from the' description given in lpinion has been greater number ma be used and the alarm r mechanism tripp with each engage-e H at of a llMld'Wlth the yoke 31, suitale m ification being made in the form of this yoke,

purposes for to adapt it for the different which the alarm may be used. Iclaim as my invention: 1. A time-piece comprising a time train gearing, a main spring for the same, and an alarm train gearing operatively connected with said mam spring, a vibratable arm opteratively connected with the alarm tram gearing, a locking member disposed to be projected into the path of the vibra'table' arm to engage the ,same and lock the alarm train of gearlng against movement, an alarm dial hand carried by a shaft operated a she t carrying a pinion meshin with a wheel. of the alarm train of a ng to be rotated therefrom, said she being pro- .vided with a cam-like member to enga e and project the locking member into t e path of the vibrating arm to stop movement of the alarm train of gearing, and a member 'carried by the .cam-like member shaft and lyin in the ath of the alarm dial hand to engage b said hand to release .95 through connections with the main spring,

the cam-like member rom the locking mem-.

her and permit movement of the alarm train .ofgearing.

2. A time piece comprising a train of gears and an operating spring therefor and an escasement, havin a vibrating arm, an alarm ial and hen meshing with one of said train of gears and having a limited rotary movement indedently of said are, means for normally therefor, a pinion 'ocking said vibrating arm,1neans connected with said pinion for normally holding said lock ng means in its lockin locking means. being release tial movement of said pinion, and means in thepath of said alarm dial hands for operatmg said pinion at a predetermined period and releasing said locking means. v 3. A time piece comprising a train 'of gears and amam s ring therefor, a vibratmg arm and pallet ment of the projected into'the arm to check its vibration, a yoke formed to position, said uponthe in1- or controllin the movegears, a sprlng positioned to'be path of said vibrating.

normally engage said spring and hold it in the path of the vibrating arm, and a pinion meshing with one of the train of gears for restoring the yoke to engagement with said s ring to check the vibrating arm following the release of the spring therefrom.

4. In a time piece, the combination, with a train of gears and a main spring therefor and a vibrating escapement arm, of a member mounted to normally hold said arm against vibration, a yoke for locking said member in position to engage saidarm, a pinion connected with said yoke and having teeth meshing with the adjacent gear of said train and having a limited movement independently of said gear for moving said yoke and releasing said locking member.

5. The combination, with a train of gears, an escapement arm and operating main spring, of a post, a pinion secured thereon andhaving teeth meshing loosely with the teeth of an adjacent ear of said train, a member mounted on said post to engage and lock said eseapement arm, the initial movement of said post and pinion moving said yoke to release said locking member and said yoke having means for engaging said locking member and returning it to its looking position when said yoke and pinion have completed a half revolution.

6. In a time piece, an alarm dial raduated for the hours of the day, and in ieator hands for said dial, a train of gears and a main spring therefor and an escapement, a vibrating arm and a mechanism connected posed to be projected into the path of the vibratable arm to engage the same and lock the train of gears against movement, a dial hand carried by a shaft operated from the main spring, a shaft carrying a pinion meshing with a wheel of the train of gears to be rotated therefrom, said shaft being provided with a cam-like member to engage and project the locking member into the path ofthe vibrating arm to stop movement of the train of gears, a member carried by the cam-like member shaft and lying in the path of the dial hand to be engaged by said hand to release the cam-like member from the locking member to permit movement of the train of ears, and an actuating arm carried by the s aft of one of the gears of the train and moved from one position to another upon release of the train of gears.

In Witness whereof I have hereunto set my hand this 25" day of October, 1917.

ALaE T P. MYER.

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