US507959A - Electric alarm-clock - Google Patents

Description

(No Model.)

C. P. WYMAN. ELECTRIC ALARM GLOUK.

No. 507,959. Patented OGL-31,1898.

l f77/vena? /arlesl? Wyman UNITED STATES PATENT EETCE.

CHARLES F. WYMAN, OF MINNEAPOLIS, ASSIGNOR TO LAWRENCE E. GERETY AND HENRY W. KNAPP, OF ST. PAUL, MINNESOTA.

ELECTRIC ALARM-CLOCK.

SPECIFICATION forming part of Letters Patent No. 507,959, dated October 31, 1893.

Application filed November 29, 1892. Serial No. 453,521. (No model.)

To a/ZZ whom it may concern: glass front 9 and the frame of the clock'I in- Be it known thatI, CHARLES F. WYMAN, of terpose the metal ring having the inwardly the city of Minneapolis, county of Hennepin, projecting flange 11. This flange is provided State of Minnesota, have invented certain Imwith an annular groove 12. The sliding con- 55 5 provements in Electric Alarm Attachments tact is composed of a bifurcated block 13 for Clocks, of which the following isa specifito embrace the flange or ring 11 and is se- Catioll. cured thereon by the short screw 14 project` My invention relates to means yadapted for ing into the groove 12. The block is prevented employment with clocks of the ordinary confrom slipping upon the ring by a spring 15 6o ro struction, and by the use of which an electric arranged in the boss 16 on the inner side of bell or bells may be operated at predeterthe block, the hole being a continuation of mined times for which the instrument is set. the screw hole in the outer side. In place of The object of the invention is to provide this spring I may substitute the iiat bow a device of cheap and simple construction spring 17 secured to the under side of the 65 15 adapted for attachment to any clock and problockraud pressing on the ring, but I prefer vided with an adjustable contact or contacts the coiled spring 15 as the same occupies less whereby the use of a large number of staspace, and the two contact points may be tionary contacts is dispensed with, thereby moved so close together as to form contactsa greatly reducingthe cost of manufacture and, quarter of an hour apart. In place of the 7o 2o in consequence, the selling price. screw 14 and the groove on the outside of the To this end my invention consists in the ring, I may provide a similar groove 17 on combination withametal ring,arranged about the inner side and of a width to accommothe clock face, of a slidable contact block or date the ends of the flat spring 17, which enblocks provided on said ring and havingapin tering the same will prevent the pulling 0E 75 or pins to be engaged by the hour-hand, the the block. In the hole 18 of the block I probell being included in a circuit the terminals vide the spindle or pin 19 normally supported of which are respectively the post of the clock by the light coiled spring 20. The inner end and said ring. of this pin is preferably upset, as shown, to

The invention further consists in details of prevent its pulling out of the block. The pin 8o 3o construction and in combinations all as hereis provided with a V groove 21 and when inafter described and particularly pointed out pressed down the pin is held in place by the in the claims, and will be more readily underspring catch 22 entering this groove and comstood by reference to the accompanying drawposed of a small headed pin 23 pressed inings, in which wardly by the coiled spring 24, arranged in 85 Figure 1 shows the face of a clock provided the stud 25 forming the inner end of the with an alarm attachment embodying my inblock. When the spindle 19 is thus pressed vention. Fig. 2 is a cross section thereof on down it is in position to be engaged by the the line xof Fig. 1. Fig. 3 is an enlarged linger 6 upon the hour hand, when the hour sectional detail of the contact block. Fig. 4 hand has advanced to a point on the dial op- 9o 4o shows a section of the ring with modified posit-e the pin. Y

means for securing the block thereon. Figs. I preferably provide from two to six of the 5 and 6 are detail views of a modified block. small blocks for each clock and, if desired, a As shown in the drawings, 2 represents the number of small switches or loop cords 27 frame of the clock and 3 the dial thereof. The may be provided in connection with the line 95 hour andvminute hands, 4and 5 respectively, 28 extending from the middle ring.

are of the usual form with the exception that A grounded line, including battery, is conthe hour hand is providedwith the contact nected with the post of the clock or with the finger 6 secured in a coil 7 upon the end of frame thereof. The separate bell circuits 29 the hour hand. The contact finger or wire are connected to the switches 27 and the bells mo 5o is so coiled to prevent straining of the hour being arranged in several rooms of a house, hand. Between the usual rim 8 carrying the one or more of the same may be rung at the same time. If it is desired to call different persons at dierent times I provide acommon `switch board and loop cords to be connected to the sliding blocks.

To aid in the proper adjustment of the contact blocks I sometimes mark the surface of 1 side to receive this shoulder 30 and'isprovided with the hole 3l to receive the spring spindle or pin 32, which spindle hasfa lug S3 projecting into the slot 34 which extends into the hole 3l.

the block to let the pin down. For preventing the slipping of the block upon the ring I provide the looped spring 37, thecoifled ends of which are secured on the under side of the block.

Having thus described my invention, I claim as new and desire to secure by Letters Patent- 1. The combination of aclock,and thedial and hands thereof, of a metal ring arranged about said dial, a slidable` contact blocker blocks arranged upon said ring and each provided With an adjustable contact pin or spindie, said ring and thehour hand forming` the terminals of an alarmcircuit, substantially as described.

2. The combination of a clock. andr the dial and hands thereof, of a metal ring arranged upon the clock in proximityI to the dial thereof The pin is providedr with a milled head 35 and when the pin is torced down the v head is turned so as to carry the lug out of i the lineof the pin and beneath the'bottorn of and concentric with the same, an annular groove provided in saidring; a slidable block arranged thereon and provided with the p rojection extending into said groove, a spring for holding the block in place upon the ring,

anadjustable-contact pin provided on said block, and an alarm circuit having for its terminals said ring and the hour hand, substantially as described.

3. Thelcombination with the clock frame, of the dial and the hands of the clock, with the metal ring arranged upon said frame concentric with said dial, saidv ring provided with the groove, a biturcated movable block arranged on the ring and having a projection extending into said groove, a pressure spring arranged on theblock toengage the ring, the spindle `19, the coiled spring V2O thereon, said spindle provided with the groove 21 and a batteryci-rcu-it or circuits of which the hour .hand andlsaid ring form the terminals, substanti ally as described.

4. The combination of a clock frame, with the dial and the hands thereof, theanged ring 10, said ring provided with an annular groove, a. bifurcated block provided with a pressure spring anda projection extending into the groove,- the spindle 19 arranged in the block, the coiled spring 20, said spindle provided with the groeve 21,.tlre stud 25 on the block, and the pointed spring latch" 22 toengage ythe spindle 19 andhol'd the same against the spring 2.0, andan electric circuit of which the hour hand and said riiig form` the terminals, substantially asl described: p

In testimony wherenf'll have hereunto7 set my hand this 19th. day of November; 1892.

CHARLES? F. WYMAN.

In: presence of-f G'. G. HAWLEY,

S. LYON.

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