US318612A - Vict ob gallet - Google Patents

Description

(No Model.)

V. GALLET.

ELECTRIC ALARM CLOCK.

Patented May 26 8 z 2., YE W I e w w A. d

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UNITED STATES PATENT QFFICEQ VICTOR GALLET, OF BREST, FRANCE.

ELECTRIC ALARM-CLQGK.

SPECIFICATION forming part of Letters Patent No. 318,612, dated May 26, 1885.

Application filed September 25, 1884. (No model.) Patented in France February 19, 1884, No. 160,391.

To all whom it may concern.-

Be it known that I, VICTOR GALLET, a citizen of the French Republic, residing at Brest, in said French Republic, have invented certain new and useful Improvements in Alarm- Glocks, (for which I have obtained Letters Patent in France, No. 160,391, under date of February 19, 1884,) of which the following is a specification.

This application relates to means whereby any ordinary clock with but slight alterations in the construction of the dial and the hourhand thereof may be converted into an alarmclock, and the usual mechanism employed in the ordinary alarm-clocks dispensed with and the alarm-giving devices located at any desired distance from the clock.

To these ends the invention consists in the combination and arrangement of parts whereby the desired results are obtained, all substantially as hereinafter more fully described, and as shown in the accompanying drawings, in which Figure 1 illustrates the essential elements of my invention by a front elevation of a clock to which the same are applied. Fig. 1 is a perspective View of the circuit-closer. Fig. 2 is a like view of a modified form thereof, and Fig. 3 is a section of the extensible hour-hand on an enlarged scale.

B B indicate abattery composed of a couple of Leclanch or other cells, A, an alarm mechanism of any desired construction and arrangement in electrical connection with one of the poles of the battery, and as this class of alarm mechanisms or electric bells is well known I have deemed it unnecessary either to illustrate or describe the same in detail, as any suitable ordesired mechanism of this class may be employed that will sound an alarm upon a gong or bell for a given time when the circuit is closed. This battery and alarm mechanism I have shown as arranged in the base 0 of a clock case or support, though it is obvious that they may be located at any other desired point on or distant from the clock-support or clock-case.

Upon the dial D of the clock, which is made of a non-conductor of electricity, I arrange two concentric metallic rings, R R, that project from said dial a suitable distance and form between them an annular channel or groove, G. One of said rings, R, is connected through the alarm mechanism by wires 10 and 10 with, say, the positive pole, and the ring R by wire w with the negative pole of the battery B.

The hour-hand H of the clock is preferably made of an isolating material, and is in that case provided with an adjustable metallic extension, h, arranged to slide on the hand H toward and over and from the groove G.

If desired, the hand H may be made of metal and isolated from its arbor, and the extension 7L may be dispensed with by making the hand H of such a length as to extend over and some distance above the groove; or an extensible hand of metal isolated from its arbor may be employed E indicates a circuit-closing device composed of two metallic plates, 0, each provided with a contact pin, e, projecting therefrom, said plates being isolated from each other by an intervening plate, (1 of rubber or other suitable isolating substance. The form of this contact-piece is segmental, so as to adapt it to slide in the groove G, in which it is held by frictional contact with the plates R and R.

It is obvious that when the contact-piece E is adjusted within the groove G, so that its pins 0 will stand opposite an hour-indication on the dial or opposite an indication marking a fraction of an hour, the moment the metallic hand H or its extension h passes over the pins in frictional contact therewith the circuit will be closed and the alarm mechanism set in operation.

The simple removal of the contact-piece E or the sliding of the extension h of the hourhand H within the inner ring will leave the clock in its normal condition of operation and cut the alarm mechanism out of operation.

Any suitable means may be employed to make the hour-hand extensible. For instance, as shown in Fig. 3, the extension h of the hand H carries a band or loop, h, that embraces the hand II and slides thereon, while said extension is arranged to slide in a like band or loop, if, secured to the hand H.

These devices may be variously modified without departing from the nature of my invention. For instance, instead of rings It B metallic strips may be arranged to form a duodecagon, the groove of which has therefore twelve subdivisions which may be arranged to thereof cons; i'llCi'Ctl to opcrziie (1S 2L tiineintlex extend from hour to hour and a squnr p and circuit-closer, or a time-index only of an lygonal contact-piece, E, Fig. 2, 1111i then he electric circuit the isolut (l terminals oi which employed and set into any one of the suhhirisi l (l in and adjustable along the path 5 ions in which it may be adjusted to the lit ur or i unil, and. an alarm. mechanism inszzio electric circuit, for the pur half-hour, as the case may be. \ihen tne contact-piece E has eontzictpins c, it is necessary to adjust the hour hand with great nicety, so piece, on electric eircuithaving that said hand will pass in lrctlonnl contact the path of one of thchznuls 01 IO over the pins, as it is evident that if tire hzurl and. 1111 uhirnr mechanism inis not sett-o the proper elevation the pins 0 may electric circuit, in (Olllblllilr stop itsi'ur'her movement, or suial hmnls I, i the haunt; oi the time-piece, 5 pass over the pins Without contacting there l he erzicnzleal or lengthened and with. To avoid ti1is,inste:ul of he pins, ilw i-closer, an." described for the 1g contact-springs may be employed huvi riggsiir- 'licd. icce the combination of the 7 zzlhc ring: zirrun g'cd thereon,

ficient plialiility to enable the hornor its extension h to overcomelhcir rcsi said spring may also he secured he; ixonirfllr "(ii ctnincctczl with the rings, to lllGlnClLiLlllCplQiQS c, and metric to cur no.1 an mini-:11 incchzixiszn 1i1l I'} Oi-;L(l in said circuit with co rtuch.

:0 wartlly into then-nth oi the hand, \rnicn may then slitlein frictional contuct ea or lipid nets of the circn t, springs.

'ihe hz'uius ol' the i'inio- 5 we cruenzleil over the coin ,l'Cll'Oill, unrlcrscribcll, l'or top of the clock-ease, am 25 other convcnicntpoint Cris or both the battery and illzl rcgoing I i 's Zoth tiny of clock.

Having thus purticulzirly described in i 30 inventionnvhat I claim, and desire to secure by otters Patent, is

1. In a time-piece, the comb s't-zintizilly as rlescrihetlwith one 01 L

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