US1234829A

US1234829A - Alarm-clock.

Info

Publication number: US1234829A
Application number: US9117716A
Authority: US
Inventors: Joseph S Trane
Original assignee: Individual
Current assignee: Individual
Priority date: 1916-04-14
Filing date: 1916-04-14
Publication date: 1917-07-31
Anticipated expiration: 1934-07-31

Description

I. S. TRANE.

ALARM CLOCK. 7 APPLICATION FILED APR. I4, 1916.

2 SHEETS-SHEET 1.

Patentd July 31,

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J.S.TRANE.

ALARM CLOCK.

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1,234,829. Patented July 31,1917.

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UNITED STATES PATENT OFFICE.

JOSEPH s. TRANE, or PoNoHA SPRINGS, COLOR-ADO.

ALARM-CLOCK.

Application filed April 14, 1916.

To all whom it may concern:

Be it known that I, JOSEPH S. TRANE, a citizen of the United States, residing at Poncha Springs, in the county of Chaffee and State of Colorado, have invented new and useful Improvements in Alarm-Clocks, of which the following is a specification.

This invention relates to clocks and has particular reference to alarm clocks.

The chief characteristic of the invention resides in the provision of a mechanism for successively indicating the days of the week on the face of the clock, together with means for preventing the sounding of the alarm on Sunday morning should the same be inadvertently set the night before.

In carrying out the invention I provide a mechanism for the above mentioned purpose, which can be used in conjunction with an ordinary construction of alarm clock, and can be associated therewith without changing or altering the clock mechanism.

The nature and advantages of the invention will be better understood from the following description when read in connection with the accompanying drawings, the invention residing in the construction, combination and arrangement of parts as claimed.

In the drawings forming part of this specification like numerals of reference indicate similar parts in the several views and in which Figure 1 is a front elevation of a clock constructed in accordance with my invention.

Fig. 2 is a side elevation partly in section.

Fig. 3 is a front elevation with the face of the clock removed.

Fig, 41 is an enlarged detail sectional View.

Fig. 5 is a detail view.

Before entering into a detail description of what is herein shown, I desire to have it understood that the same is merely illustrative of one embodiment of the invention to which I do not limit myself,- and that certain changes in the construction and ar rangement of parts may be resorted to when desired as fall within the scope of what is claimed.

Referring more particularly to the drawings in detail A indicates a clock of the Specification of Letters Patent.

Patented July 31, 1917.

Serial No. 91,177.

alarm type, which may be of any suitable construction, and may be in the nature of a one day, eight day, or thirty day clock, the alarm being indicated generally at B and controlled by means of a mechanism of usual construction, intermittent or otherwise.

The alarm mechanism however includes a manually operable hand 10 for setting the alarm, the hand being mounted upon a shaft 11 for rotation therewith as in the usual construction of alarm clocks. This shaft has loosely mounted thereon one gear 12 of a train of gears forming the clock mechanism, and cooperates with a resilient arm 13 to permit the sounding of the alarm. The arm 18 has a finger l1 projecting therefrom at right angles, and normally disposed in the path of movement of the hammer arm 15 to prevent movement of the latter with a consequent sounding of the alarm. Fixed upon the shaft 11 for rotation therewith is a collar 16 disposed in advance of the gear 12, and provided with a lug 17 normally engaging the hub of the gear 12. The lug 17 when set together with the hand 10 in a predetermined position for the sounding of the alarm at a prescribed time, functions to hold the gear 12 in a retracted position against the tension of the resilient arm 13, and causes the finger 11 on said arm to be disposed in the path of movement of the hammer arm 15. It is of course to be understood that the gear 12 revolves once in every twelve hours, or in other words twice a day, and the hub 18 thereof is provided with a cam Surface 19 which when moved across the lug 17 permits the gear 12 to be thrust forward on the shaft 11 under the influence of the resilient arm 13. During this operation the finger 1 1 is moved out of the path of movement of the hammer arm 15 which permits the sounding of the alarm. The clock however is provided with the usual silence mechanism controlled by means of the lever 20 which when in operative position prevents the sounding of the alarm under any condition. The foregoing is the construction and operation of the ordinary alarm clock and does not form a part of this invention,

With a view of preventing the sounding of the alarm on Sunday morning or every seventh day I preferably make use of a cog wheel 21 loosely journaled upon a suitable support in proximity to the gear 12. The cog wheel is operated through a suitable connection between the same and the gear 12, and which connection preferably consists of a pin 22 carried by the gear 12 and projecting therefrom to mesh with the teeth of the cog wheelon each and every revolution. The cog wheel is preferably provided with fourteen teeth, thirteen of which are of uniform dimensions to clear a projection 23 extending forwardly from the resilient arm 13, while the remaining tooth 24 is relatively long to engage this projection for the purpose to be presently described. As above stated the gear 12 revolves once in every 12 hours and through the instrumentality of the pin 22 rotates the cog wheel 21 one space, or the distance between two adjacent teeth thereof. In other words the cog wheel 21 is moved two spaces or the distance between three teeth thereof every twenty-four hours, as the gear 12 revolves twice a day. Should the alarm mechanism be set for a predetermined time, with the silencer lever 20 in an inoperative position, the alarm will sound without any interference on part of the cog wheel 21 except on Sunday or every seventh day. In this connection it will be manifest that as the cog wheel 21 moves two spaces each day or in other words the distance between three teeth, that on the seventh day the relatively long tooth 24 of the cog wheel is brought into engagement with the projection 23 on the resilient arm 13. In this position of parts the finger 14 is held in its normal position, that is in the path of movement of the hammer arm 15, and should the alarm be inadvertently set on the night before, the alarm will be prevented from sounding by reason of the disposition of the finger 14, as will be readily understood. As the gear 12 continues to rotate the relatively long tooth 24 will be moved out of engagement from the projection 23 thereby rendering the alarm mechanism again operative. The relatively long tooth however will not be moved out of engagement from the projection until some time between twelve and one oclock noon, and will not be active again until the seventh day following.

' In carrying out the invention I also provide means for successively indicating the days of the week on the face of the clock, and in this instance preferably make use of a cog wheel 25 loosely journaled in close proximity to the gear 26-which carries the arbor 27 for the hour hand, and through which arbor projects the shaft 28 for the minute hand. Loosely journaled upon the frame of the clock mechanism is a third cog wheel 29 which is disposed below the gear 26 in close proximity thereto, and preferably comprises a series of eight teeth, every alternate tooth carrying a pin 30 which projects at right angles from the tooth for meshing engagement with the teeth of the cog Wheel 25 to intermittently rotate the latter upon rotation of the cog wheel 29. The cog wheel 25 preferably includes a series of fourteen teeth, and secured upon one face of the cog wheel 25 is a disk 31 containing indi cia indicative of the different days of the week, the indicia being arranged circumferentially of the disk as shown, so that each day will be singly presented to view through the slot 32 in the face of the clock. It is of course to be understood that the gear 26 makes two revolutions every twentyfour hours, and this gear carries a pin 33 adapted to mesh with the teeth of the cog wheel 29 to rotate the latter. The construction is such that the cog wheel 29 is rotated two spaces or approximately the distance between three of its teeth every twenty-four hours, and through the instrumentality of the pins 30 the cog wheel 25 is moved the same proportionate distance with respect to its teeth in every twenty four hours so that the indicia indicative of the days of the week carried by the disk 31 is singly presented to view through the slot 32. This change of day generally takes place between twelve oclock and one oclock midnight.

The invention as will be obvious consists of very few parts which can be used in connection with different construction alarm clocks, without altering or disturbing the arrangement of the clock mechanism. It is believed that from the foregoing description the nature and advantages of the invention will be readily apparent although I desire to have it understood that the various parts of the invention may vary in proportion without departing from the spirit of the invention. 7

What is claimed is:-

In an alarm clock, an alarm mechanism including a movable hammer arm, a leaf spring secured at one end to the frame of the clock, a laterally disposed finger projecting from the opposite extremity of said spring normally engaging the hammer arm to prevent movement of the latter, means cooperating with said spring to automatically 'move said finger out of engagement with said arm at a predetermined interval for which time the alarm is set, a lug, projecting from the free extremity of said spring in a direction opposite that of the said finger,

means for nullifying the action of the alarm mechanism for a predetermined period once structing position relative to said arm to in seven days, including a gear Wheel hav prevent sounding of the alarm.

ing a prescribed number of teeth, said Wheel In testimony whereof I aifix my signabeing under control of the time mechanism, ture in presence of tWo Witnesses.

and one of the teeth of said Wheel being JOSEPH S. TRANE. longer than the remaining teeth to engage Witnesses: 7

said lug, thereby holding said spring under WALLACE SoHooLrniLD, tension and keeping the said finger in an ob- J OHN W. J AY.

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