US1555076A - Electric device - Google Patents

Description

sept.29,1925. '1,555,076

-E. RABONI ELECTRIC DEVI CE Filed Sept. 19, 1923 Edurdo Ran,

Iuzenor:

Patented Sept. 29, 1925.

UNITED STATES" .EDUARDO RABONI, O'F NEW YORK, N. Y,

ELECTRIC DEVICE.

Application filed September 19, 1923, Serial No. 663,588.

To all whom t may concern:

Be 1t known that I, EDUARDO RABONI, a

l citizen of the Republic of Uruguay, and

resident of New York, in the county and State of New York, have inventedrcertain new and useful Improvements in Electric Devices, of which the following is a specil cation.

My invention relates to electrical appara'- tus as commonly used with bells, buzzers, enunciators, or the like, and the principal object of the invention is the provision of a certain form of electromagnets and operating mechanism whereby a very compact de'- vice can be secured, and which will, for this reason, be cheap to manufacture.

Other advantages and objects will be apparent as the description proceeds, and consist to a, large extent in the combination, construction and arrangement of parts illustrated and described.

I have illustrated in the accompanying drawings, various embodiments of my invention, but it is understood that the forms herein illustrated are merely the best eX- amples of which I am now aware.

In these drawings Figure 1 is a plan view, partly in section for clearness of illustration, of the buzzer form.

Fig. 2 is a transverse section taken substantially centrally of Fig. 1.

Fig. 3 is a plan view of the bell form.

Fig. 4 is a. vertical central section of Fig. 3.

Figs. 5, 6 and 7 are views of details.

I have found that I may expeditiously make use of an 'ordinary stock rivet of magnetic metal, as at 1, in forming the magnet core for use in these devices. When such an element is wrapped with a coil, as at 2, and the ends connected with a suitable source of energy, magnet flow will be induced through the core 1, as is well known in this art. A perforated disc 3 of fibre, hard rubber, or other suitable insulating material, ma be placed over the end of the rivet 1, which will form a. suitable shoulder against which the windings 2 may be built. If the disc 3 is placed slightly below the end of the rivet 1, the projecting part 1l of the rivet will be free from obstruction in attracting magnetized metal thereto.

In the embodiment of a buzzer as shown in Fig. 1, I may provide a base 4 of wood, porcelain, fibre, or any other suitable material, which is suitably cored from one side thereof to form an aperture 5; In case the base 4 is of porcelain, this aperture will be molded therein in the production of the base. l/Vithin the aperture 5 I place a pair of electromagnets 6 constructedas above, arranged in a single circuit. One end of the wrapping 2 is passed through an aperture in the base '4 which has its outletin proximity to the terminal 7 to which said lead wire is attached. The other end of the winding 2 vit attached as at 8 to a'fiexible copper sheet 9 which overlies the electromagnets 6, and has one end 10 bent upward and in contact with fthe base of each rivet in each electromagnet in order that the two magnets may be included in one magnetic circuit. The flexible copper plate 9 is at thevfront end of the' electromagnet, bent at right angles upwardly and then back upon itself downwardly, as at 11, the free end thereof being again bent upwardly to form a spring contact member 12, for a purpose more fully described hereinafter. The portion 11 is held in a slot 13 in the center of an iron hammer or weight 14 for a purpose hereinafter set forth. l

A screw 15 having the threads thereof removed from one end'to form a smooth contact portion 16, is inserted into the base 4 through an aperture provided for this purpose, the head of the screw being counter sunk to a position iush with, or below the plane of the side containing the screw aperture. A lead wire 17 connects this screw through the base 4, to the second terminal 18. The screw 15 penetrates the base 4 to an extent sufficient to make contact with the springend 12 of the plate 9. The circuit for the device is as follows :-Beginning with the terminal 7, Athrough the electromagnets 6 to the plate 9, upon which the circuit is grounded as shown at 8, along the yplate 9 to the spring end 12, from there to the screw 15, and finally to the terminal 18. It will thus be apparent that if for any reason the spring end 12 is moved out of contact with the screw 15, the circuit will be broken. If then the terminals 7 and 18 are connected with a suitable source of energy, as for in stance a dry cell battery, the cores 1 in the electromagnets 6 will become energized and will attract the hammer 14 thereto, which in inclining toward the magnetized cores, will break the circuit between the screw 15 and end 12. Thus the circuit will be interrupted,

'the cores will become deenergized, and the hammer 14 and springend 12 will fall back to its normal position, which will again make the circuit, and the cycle is repeated. It willk tractive appearance of the device, but which also makes such a construction of simple character and cheap to manufacture,

I have shown a 'removable plate 1,9 covering an aperture which exposes the buzzing mechanism, as this may be found desirable in `some instances, although it will be Vreadily seen that such an aperture is not needed, as the entire mechanism can be inserted from, and taken out of, ,the aperture in the edge of the base 4. i

Sealing wax 20, or other suitable plugging means, is used to cover the aperture in the side of the base.

v.In ,applying such a structure to an electric bell rather than a buzzer, I use a base 4a which is provided with two apertures therein of a size to receive two electromagnets 6. The windings of these coils are connected together so that the two magnets are in the same circuit, one end 22 of the coil being connected tothe terminal 23, and the other end 24 to the hammer mechanism. The hammer mechanism consists of a piece of springv metal 26 secured to the base as by means of pin 27. To the spring metal 26 is secured the iron hammerproper 28, which consists of a strip of material heavier than the spring portion 2,6, deformed as at 29 to form an inclined hammer Vor striker 30. That portion ,of the striker 28 adjacent Vthe spring metal 26 is formed with upstanding walls crimped upon the spring metal 26 as at 31. One end .of the spring metal 26 kis turned upwardly as at 32, for a purpose more fully describedv hereafter. A metallic bridge 33'secured to the base 4%, overlies the hammer mechanism, and the spring end 32 is normally placed in Contact therewith. A lead 34 connects the bridge 33 with the terminal 35.

The circuit for the current is as follows Entering at the terminal 23, it passes around the electromagnets 6 to the hammer mechanism and through the spring end 32 to the bridge 33, which conducts it through lead 34 to the terminal 35. Thus when the terminals 23 and 35 are connected to a source of energy, the cores, which will be magnetized, will cause the iron hammer 28 to be attracted thereto, which will cause in turn the spring end 32 to leave the bridge 33, thus breaking the circuit. Upon this event, the cores will become deenergized and the hamm'er 28 vunder action of the spring portion 26, will again cause contact to be made between the parts 32 and 33 and the cycle is repeated.

A bell 36 is secured to the base in a man-- ner to cause its full resonance to be secured, and is arranged in such proximity to thc striker 30 that each oscillation thereof will cause the striker 30 to contact with the bell 36.

A n expeditious manner ofV attaching the bell to the block 4a is illustrated and shown to consist of a screw element 37, the head of which is formed into an oblong shape. This oblong extremity is now passed through `a similar hole in the bell, the projecting parts 38 being separated by a suitable implement, which thus securely rivets the bell to the screw element 37. This screw element and bell assembly may now be screwed into a hole in the base provided for this purpose. A metallic insert 39 connects the two cores in the electromagnets to cause the magnetic flow to include both cores.

I-Iaving thus described my invention, what I claim is:

In combination, a base of insulating material, an aperture therein, -an electromagnet located in said aperture, a flexible sheet of spring material one end of which extends beneath the electromagnet, the other end constituting a make and break device, its intermediate portion carrying an iron hammer.

In testimony whereof I affix my signature.

EDUARDO RABONI.

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