US871168A - Electric bell. - Google Patents

Description

PATENTED NOV. 19, 1907.

E.'J. HEBNBY.

ELECTRIC BELL. APPLIOTION FILED 1113.12, 190e.

wia/eases.-

. moved; Fig. 2 is a vertical section through the middle of the instrument.

' 'The invention' further relates to certain sists in means for adjusting the gong or bell the striker and the gong, it being obvious NXTED STATES A*PATENT OFFICE HENRY J. HEENEY, OF BOSTON, )'IASSACHUSETTS, ASSIGNOR TO HOLTZER CABOT ELECTRIC COMPANY. A CORPORATION OF MASSACHUSETTS.

ELECTRIC BELL.

No.l 871,168. Specification of Letters Patent. Patented Now. 19, 1907.

Application filed Februarv 12. 1906- Serial No, 300591.

To vall A'whom 'it may concern: 1 the member b upon the-terminal conductors Be it known that I, HENRY J. HEENEY, to make a water-tight fit. a citizen of the United States, residing in l The bell c is supported 'outside of the Boston, in the county of Suffolk and State l casing 1adjacent to a diaphragm d which is of Massachusetts, have invented an Improveherein shown as a piece of thin sheet metal; ment inElectric Bells, of which the follow- I preferably corrugated, which completely ing description, in connection with the acj closes an opening at the bottom ofthe ca'se companying drawings, is a specification, like l a. The striker e, which is wholly inclose'd letters on the drawings representing like within the casing, is arranged to strike parts. l directly on the diaphragm t irough which The present invention relates to an electhe blow is imparted to the bell c, the bell tric bell,the pur ose of the invention being being in the iield of impact of the striker. to obtain a bell o this kind for out-door use, It is desirable, therefore, that the distance or for use on'ship-board, in which the vital' between the bell and the diaphragm should parts, that is to say, the electro-magnets, contacts, &o., will be thoroughly inclosed in a Water roof case.

that the-diaphragm may be sufficiently near to the b'ell not to interfere with the fdrce of details of construction 'and arrangement of the electro-magnet, armature, cc., which Will be more Jully hereinafter described.

A further feature of the invention consamle time, suiliciently far from the bell not to'interfere with the vibrations thereof.

' As herein shown, the bell c is supported in a member c2 which projects downward from the bottom of the case, having a supporting flange c3 secured to the bottom of the case 'byV means of screws c.` In theiuconstruction shown, the member 'c2 is in the form of an yinclosing hood, so as to aid in the' protection of the bell itself.

For purposes of adjustment, the bell is shown' as provided with an opening c5,l through wlnch extends a supportingscrew' c which coperates with a clamping screw or nut c7 alt the outside to hold the bell in position. The opening ci is, made slightl o ut of alinement with the axis of the bel so that the bell thus supported is in the nature of an eccentric, it being obvious, therefore, that by loosening the nut c7 and turning the bell on the screw c, the periph- -ery thereof'which receives the blow may be adjusted in itsposition relative tothe diaphragm d. The bell may beoperated either proper with relation to a diaphragm which orms a tight inclsure of the case between that the gong should be near enough to the diaphragm to receive the blow, and, at the same time, not too near to interfere with the sound vibra-tions.

Figure 1 is a front elevation, partly in section, of a bell embodying the invention, with the cover of `the inclosing case re- Referring to Fig. l, the operating 1nechanism for, the bell is completely inclosed' in a Water-tight casing af, the said casing being shown as a-box open at the front and' provided with an inclosing cover a2 with an interposed washer a3, so that the said cover toafford a watertight seal. The case is also provided with an opening at 'the top for the terminal conductors 2 and 3 which are j shown as passing through openings in a block of yielding material b, such, for example, as rubber, which is contained in a tube or nipple b2 having an external screw thread forinsertion into the opening in the' topvof the'case. The tube or nipple bz also contains a compressing member b3 which can be-forced into contact with the part b by meansof a coupling nut b, thus compressing mechanism which operates the striker c being wholly inclosed in the case a.

As herein shown, the case contains an electro-inag1iet f arranged to attract an armature g provided with a restoring spring g2, the said armature g being of-suihcient length to extend across the pole pieces of the oted at c?, and connected at e* with the striker e. lThe point of connection between beeasily and delicately adjusted inforder the blow given by the striker, and, at theas a single stri-ker' or as a vibrator, the' electro-magnetj, and being connected at the end opposite its pivot g with anaim .e2 piv.

supported in one ot the upright-s i2 of the 2 sri,

the armature g and lthe arm @Vis relatively near to the pivotal support e3, so that a relatively small movement of the armature g will produce a surlicient movement of the striker e to give a good hard blow. Furthermore, I this arrangement is such that the armature g, having so smal-l a movement, lies close to the cores of the electro-magnet, thus beingin a strong magnetic .eld This construction renders the bell adaptable for use with currents having a wide variation of voltage. y

vIn order to, cushion the recoil ot the striker e in response to the action of the spring g2, the said striker is arranged to cooperateA with a spring h, herein shown as rsecured by means oi a nut h2 on a screw h3 me member fi', which uprights afford the upports for the magnet and for the armature and arm e2, This spring h is engaged by gprojection e5 from the side of the striker l n the u ward movement of said striker. f the be l is to be used as a vibrator, a circuit breaker is employed, saidcircuit breaker being herein shown as consisting of an adjustable stationary contact It' which cooperates with a movable contact m which is arranged to be acted upon by the projection e5 in the downward movement of the striker e. F or convenience in construction, the said member m may consist of an extension of the spring Al1, the entire spring h, ym, being separated bv insulating material'n'i2 from the supporting member-1.

The supporting member 1' is provided at the base with an opening i3, which constitutes a guide for the striker c, and the diaphragm o' is clamped to the bottom of the case by means ot said supporting frame. The 'said trame is held in place by screws i* inserted through the under wall of the case of.' l rl`he under part of the frame i. is hollowed I Aout over the diaphragm, as indicated at fi,

so as not to interfere with the tree operation thereof, but the guide portion for the striker is extended into contactwith the diaphragm, 'thereby preventing the said diaphragm from setting up vibrations after the blow has been struck.

1. in an electric bell, the combination with au electro-magnetg an armature, and a striker operated thereby; of an inclosed casing tor said electro magnet, armature and striker; a gong supported outside oi the casing in the lield of impact ot said striker; a diaphragm forming a part ol the wall of said casing, and heilig interposed between said striker and said gong; and means for prel1 venting said diaphragm from. vibrating.

2. in an electric bell. the combination with an electro-magnet and a longitudinally `j movable striker operated thereby; of a cas ing to contain said electro magnet and l striker; a cover for said casing; a Washer interposed between said cover and said casing.

to constitute a water-tight seal; electric conductors to energize the said electro magnet; a flexible member provided With openings for said conductors; means for compressing said flexible member to hermetically seal the same around said conductors; a gong outside of the casing in the path of impact of said striker; a diaphragm forming part of the wall of the casing and interposed between said striker and saidv gong; and means for preventingsaid diaphragm from vibrating.

3. In an electric bell, the combination with an electrodnagnet, an armature and a striker operated thereby; of an inclosed casing for said parts; a gong supported outside of the casing in the lield of impact of said striker a diaphragm forming a part of the' wall of said casing and being interposed between said striker and said gong 3 means Jfor preventing said diaphragm from vibrating; and means for adjusting the position of said gong with relation to said diaphragm.

4. In an electric bell, the combination with an inclosed case rovided with a diaphragm in one wall; o striking mechanism inclosed in said case; a hood-shaped supporting member connected with the wall of said case of which said diaphragm forms a part; a clamping member supported in said supH porting member; and a circular gong rovided with an opening slightly out of a inement with its center, said supporting member extending through said opening in said gOHg.

operating means contained thereinja diaphragm forming part ot the wall of said casing; a fixed part within the casing lying in contact with the diaphragm near the middle thereof; and a bell outside the casing close to, but not in Contact with, the diaphragm. 6. In an electric bell, the. combination with a .hermetically'sealed casing; ot' an electro-magnet contained therein; a reciprocating striker also in said casing; an arm having a stationary pivotal support at one end, and being pivotally connected with said striker at the other end; a pivotally supported armature for said electro magnet connected with said pivotally supported arm; a diaphragm constituting an inclosingI part ot' said casing, and being in the path ol the said striker: and a bell outside of the casing, and in the field of impact ol' said striker' to receive blows therefrom through said striker.-

ln testimony whereof, I have signed my name to this specification in thel present-c ol' two subscribing witnesses.

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