US1017689A - Electrowhistle-alarm. - Google Patents

Description

G. H. RBTTMANN. ELBGTROWHISTLE ALARM.

uruou1on nun rau 1911.

Patented Feb. 20, 1912.

|Illllll ll.rllllllldfl CHARLES H. RETTMANN, OF CHICAGO, ILLINOIS.

ELEOTROWI-IISTLE-ALARM.

Specification 01 Letters Patent.

Patented Feb. 20, 1912.

Application 1iled l(ay 6, 1911. Serial N0. 625,510.

T all wlwm it may concem:

ing at Chicago, in the county of Cool: and State of Illinois, have invented certa1n new and nseful Improvements in Electrowlustle- Alarms, of which the following is a specification. l My invention rela tes to improvements 111 devices for producing whistling sounds.

One of the objects of my ihvent-ion is to provide an electric motor, that may be operated froni a remote point t0 set in motion air, that may 'be employed 1n ass0c1at1on with a proper device for producing a Whistlin-g sound; for signaling; f0r producing msical notes, or for sounding alarms of distinctive characters.

Other and further objects of 1myinirention will be iomz readily apparent to persons skilled in the art from a consideration of the following description taken.in comjunction .with the drawin'g wherein;

Figure 1 is a centr.al section of the device shoing a horn in dotted, lines; and

Fig. 2; is a [ilan view of the casing and the contained electric motor with the top re- 4 a chamber 6, which latter Contains an e1ectridmotor, consisting of an elect-ro-magnet 7, comprising coils 8 and 9, net

roviding magpoles 10and 11 respechvely, joined t0 the mtegral yoke 12, as by scr ews 13 and.

14. responsive armatur'e 15 is pivoted m a frame 16, as at 17, so that it may move frely within a field near the magnet poles 10 -and 11-. The frame 16 is secured to the Wall of the casing, as by screws 18. The cover 19 is preferably adaptedfor screw threaded engagement with the open end of the casing 5, as at 20, und to bulge outwardly as at 21. Fixed to the interior surface of the cover, underlying the bulged portion 21, is a similarly inwardly-curved piece 22, secured to the cover, as by pins 23,

orv otherwise, to .provide therebetween a chamber 24. The piece 22 und the art 21 are axially perforated 'as at 25. Wiien air is ;forcibly driven through the perforations, 25, the air is set into Vibration to produce sound in well known mahnen That the electric mdtor may produce the desired draft of air, I cover the qpening of the casing With a diaphragm preferably of Be itkhown that I, CHARLES H. Rnrr MANN, a citizen 0f the United States,-res1drubber 0r other similarly flexible material-and secure it at its edges to a metallic annulus 27, to aiford support for said diaphragm. Near the central region of the diaphragm I securd a disk 28, preferably metallic, to serve as a plunge'r, to a degree, when the diaphragm is vibrated and to act as a wearing plate. A spring 29 is seoured to the cover 19, as at- 30, its free-end bearing upon the diaphragm near its center and yield ingly holding it in an inwardly inclined position against the action of the motor. An arm 31 fixed for movernent with the armature 15, as by screws, bears upon the plate 28, on substantially the opposite position of the diaphragm controlled by spring 29.

When theelectro-magnet is ener,gized the diaphragm Will be pushed out'wardly by the arm 31,- against the spring 29 and cause a draft of air t0 be forcibly projected through the p'erforations 25, thereby producing a whistle-like note. 'Whsn the electro-n'mgn6t is denergized the diaphragm 26 will be returned to its original positipn by the spring 29, thus causing another draft of air to pass.through the perforations 25, and thus producing another whistl'ing ir'npulse. If n 0w the diaphragm be rapidly moved in alternate directions, there Will be produced thereby a succession of cdrrespondin whistl ing impulses. T0 t.his end I provi e a vibrat 'ing means in the contact spring 32 secured to an insulating block 33 carriedby the armature 15, in coperative relation with the inlsulated contact screw 34, substantially such an arrangement as is usuall y applied to a vibrating hell.

One end of the windings ofthe coils -8 and 9, is connected t0 the frame, as at 35. the other end is connected to the insulated contact spring 32. T0 the terminal screw 36 mounted upon the cover in eleetrical connection therewith und with the casin is attached one wire 37 of the circnit. W1re 38 is inay Dia 1ised as an alarm signal for automobiles, or it may be used in other situations where it isdesirable that ihshall be operated from a remote eint, and a lur-ality 0f such devices, a apted to pro3uce s0 unds varying in chiaracter, could be" us'ed a a music-producing instxument.

While Ihave' herein disclosed' a single embodiment of 1t1y.invention it isevid'ent that chan ges within the spirit and scope f theclaims may be made without departure from my invention. v

Having described my invention, what .I'

claim is:

1. In a 'device of the charactem described,

the combination with a casing, an electromagnet; therein, of a cover therefor, means on the cover operable by impulses of air to produce sound, -a diaphragm, and dia' hragm moving means associated With sa1d d1aphragm .and m:ignet. tn' produce impulses of air for the sound' ro flucing -means.

2. In a devioe 0Fth e character described, the combination withual casingg, a perforate closure therefor, a flexible diaphragm dividi1'1g said casing intqtwo, co1hpartments, an electro-magnet in one compartment, an nieans connecting said magnet' und diaphra gm t0 vibrate'-tha latter whereby air in the ot-her compartment is caused to be projected from und drawn in throtigh said perforation tb produce a whistling sound.

3. In a device of the character described, the combination with a casing, a perf0rate closure therefor, a flexible.diaphr'agm dividing said casing int o two compartments, an electro-magnet in 'one compartrnent, means connecting said magnet and diaphragm to vibrate the latter to produce air curren'ts to and from the other compartrnent through said perforations; und a sound-producing means in the path of said air currerits.

4. In a deviceof the charactep described, a casing, a cover t-berefof, means upon the cover operable by impulseS of air to produce a sound, a diaphragrn dividin said casing into two compartments, means m one said compartineht to hold said diaphragin yieldin'gly tbward 't-he other compartment, und means in said other compart-ment to move the diaphragm back against said yieldin means 'to cause impulses of air, compr1sing an electromagnet, an armature therefor, an arm movable by said armature' to press against said diaphragm, and suitable e1ectric contacts t0 control said electromagnet.

5. In a deviCe of thebharacter described, a casing, means on a wall of the casing operable by impulses of air to produoe a sound, a diaphragrn in said casing, a spring upon one s1de of said diaphiragm bearing upon the diaphraghn ne'ar its center, and means upon the other side- 0f the dia hragm t0 .move it against the efl'ect of sai s"pring t0 produce an impulse of air eompxising an electromagnet, an armature moved ther6by, und an arm 31 fixed at ona end to said armature, and at its other end arrariged to bear against said diaph-ragm 'near its center when 'the armature is attracted.

of its mqvement and mea'ns within the casing to move sa1d diaphragm aga inst said yielding means to force air frmn said air space fon the production 0f an impulse of air. In testimo'ny whereof I hereunto set my band in the presence of two witnesses.

CHARLES H. RETTMANN.

In the presence of- F OREE BAIN, MARY F. ALLEN.

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