US703425A - Electric alarm-clock. - Google Patents

Description

Patented July I, I902. 2. H. KEVDRKIAN.

ELECTRIC LARK CLOCK.

(Application filed Feb. 12, 1901.)

(N0 Modal.)

WITNESSES m T m V w A TTOHNE Y UNITED STATES PATENT OFFICE.

ZAREII I-I. KEVORKIAN, OF PHILADELPHIA, PENNSYLVANIA.

ELECTRIC ALARM GLOGK.

SPECIFICATION forming part of Letters Patent No. 703,425, dated July 1, 1902. I

Application filed February 12, 1901. Serial No. 46,977. (No model.)

To (0Z5 whom, it may concern:

Be it known that I, ZAREH H. KEVORKIAN, a subject of the Sultan of Turkey, residing in the city and county of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in Electric Alarm- Clocks, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming a part of this specification.

This invention relates to electric alarmclocks; and it has for its obj eet to provide in such a mechanis ma novel construction and organization of devices whereby simplicity and ease of setting are combined with accuracy and efficiency of operation, as will be hereinafter particularly described and claimed.

In the drawings, Figure 1 is a front elevation of my improved alarm-clock, showing the key in position in dotted lines. Fig. 2 is a vertical section, as on the line 2 2 of Fig. 1, showing the framework" only of the clockmovement. Fig. 3 is a sectional detail, as on the line3 3 of Fig. 2.' Fig. sis a detail, enlarged, of the hour-hand. Fig. 5 is a'view of the key.

A represents a suit-able casing in which the clock-movement is contained; B, the framework of the movement; 0, a dial, of non-conducting material, affixed to the posts I) of the frame, and D D the arbors for the hour and minute hands 01 d, respectively. Rotatably fitted within the central aperture of the dial and out of contact with the arbors is the hub c of a spur-Wheel E, which lies exteriorly of the dial. This wheel is maintained in place by a centrally perforated cap or plate 6', which is affixed to the hub so as to take frictionally against the inner face of the dial. On the spur-wheel is an arm F, which extends adjacent to the divisions of time on the dial, whereby by the turning of the wheel the arm may be set to any predetermined division indicated on the dial. In the dial adjacent the spur-Wheel are orifices c, in either of which may be inserted the barrel of a key G of novel construction. This key is provided at or near the barrel with gear-teeth g, adapted to mesh with those of the spur-wheel E, and thereby facilitate the setting of the arm F. One of the orifices is provided with the usual stem 1) for the winding of the clock-spring,

the key being preferably formed at its outer extremity with a socket g, which may be applied to such stem to effect the winding of the spring.

011 the under side of the hour-hand d, near the free end thereof, is an antifriction-roller II, which is adapted at a predetermined interval to bear upon the arm F and make electrical contact therewith. To regulate to a nicety the contact of theroller with the arm, I journal the roller in the free end of a flat spring 7L, that is fastened at its opposite end to the hour-hand, and I provide such hand with a set screw 7L, that bears upon the spring. Hence by manipulating the screw delicate adjustment of the roller in respect to the plane of the arm F may be effected.

Affixed to the inner face of the dial is a series of spring-fingers I, which bear yieldingly against the cap of the wheel E to make good electrical contact therewith. These lingers are connected bywires i, as indicated, and are included in an electric circuit, the conductors 1; t" of which are secured to one of these fingers and to the metallic clock-frame, respectively. lVhile a single spring-finger may be used, I prefer to use several, so as to insure proper electrical contact.

In the electric circuit is included an electric alarm-bell J and also a suitable switch j.

By the construction above described it will be seen that if the arm F be set to the division of time when it is desired to sound an alarm and the switch be turned to active position the roller II on the hour-hand will upon reaching the time indicated ride upon and make electric contact with the arm, thereby completing the electric circuit and effecting the sounding of an alarm. As the bell will continue to ring as long as the contact is made, I preferably provide the arm with a lateral extension f in the path of the contactroller, so that to stop the alarm within a certain interval of time it is necessary to move the switch to break the electric circuit.

I claim 1. In an alarm-clock of the character described, the combination of the hour-hand, the dial, the arm in the path of said hand, the central spur-wheel carrying said arm, the key provided with teeth adapted to engage those of the spur-wheel, a contact-spring bearing against said Wheel, the electric alarm, and the normally broken circuit therefor connected with said contact-spring and with the clock-movement, substantially as described.

2. In an alarm-clock of the character described, the combination of the hour-hand, the apertured dial, the arm in the path of said hand, the central spur-wheel carrying said arm, the separate key adapted to be fitted to the electric alarm, the normally broken circuit therefor, a setting-arm in said circuit, a spur-wheel carrying said arm, and a toothed key for engaging and turning said spur-Wheel, substantially as described.

4:. In an alarm-clock of the character described, the combination with the hour-hand, the dial of non-conducting material, the arm in the path of said hand, the central wheel or support for said arm, a contact-spring affixcd to the dial and bearing against said wheel or support, the electric alarm, and the normally broken circuit therefor connected with said contact-spring and with the cloclomovement, substantially as described.

In testimony whereof I have hereunto affixed my signature in the presence of two subscribing witnesses.

ZAREII II. KEVORKIAN.

Vitnesses:

JOHN R. NOLAN, ANDREW V. GnoUPn.

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