US902105A - Electric bell. - Google Patents

Description

G.- H. NORTH. ELECTRIC BELL. APPLICATION If ILBD APB.22,1905.

Q8 g. t w w C 2 6 M p. am. m 54.2. n WM m IF-m WWE 3 K m r M 1A To all whom it may concern:

TED ST TE-s PATENT OFFICE.

CHARLEs n. NORTH, OF CLEVELAND, oHIo, ASSIGNOR TOT'HE NORTH ELECTRIC COMPANY, 0F CLEVELAND, 91110, A CORPORATION OF 01110. a

ELECTRIC BELL.

Specification of Letters Patent.

Patented Oct. 27, 1908.

Application filed April 22, 1905. Serial No. 266,826.

Be it known that I, CHARLEs H. NORTH, a citizen of the United States of America, and a resident of Cleveland, in the county of Guyahoga and State of Ohio, have invented certainnew and useful Improvements in Electric Bells, of which the following is a specification.

My invention relates to improvements in electric bells, although some of the features thereof are not necessarily limited to this particular use. v

In perfecting myinvention, it has been my object to provide apparatus of extremely simple and cheap construction, and particplarLV adapted to meet the requirements of commercial use.

More in detail, it has been my, aim toefl'ect improvements in the mounting of the armature and associated bell-tapper or other parts,- whereby the pivotal mountings of prior bells are avoided, and the device is made more sensitive in the response to suitable ringing currents.

In addition, certain features of its construction, render my improved bell one that is readily altered to serve as a biased ringer, and it may be adjusted to become responsive to selective signaling currents.lraving given characteristics or periods.

My improvements will be seen to comprise the mounting of the armature directly upon scale bearings, or preferably, upon sets of scale-bearings opposed by spring-actuated means, the same being accurately adjusted, to avoid any lost motion and minimize the friction. It has been common experience in the art that pivotally mounted armatureparts do not present such advantages, and it ias been my aim to overcome theinherent disadvantages found in such structures, and improve otherwise'thereon.

The features of my improvements will be more;.readily grasped, by making reference to tlie accompanying sheet of drawings, illustrating in detail an electric bell mechanism constructed in accordance with my invention, wherein Figure 1 is a'viewin elevation of the said 2 is a vertical sectional view throu 'h the center thereof. Fig. 3 is a detail of the lower portion, partially-broken away and sectioned, better toillustrate the bearing, and showing as we'll a biasing spring.

' armature.

Fig. 4 is a plan view of the supporting-yoke and bearing. Fig. 5 is a similar View of the I have employed the same character of refer- 'ence to indleate SlIllllfli parts, in order to avoid any misconception or confusion.

.An upper mounting-plate or frame a serves to carry the se eral parts of the structure. port the bells or gongs b, in position to be sounded by the intermediatelypositioned bell-tapper 0, under the influence of exciting electro-magnets. To the upper end of the central depending post (1, is secured. the per manent polarizing magnet e, which surrounds the operative parts of the bell, as best shown in Fig. 2. The lower portion of said post d adjustably supports the yoke f, the armature g, and the outer scale-bearing h. The adjustment is obtained by means of the screw d, which enters said post, and forces these parts together against the ten sion of an interiorly-positioned coiled spring i. .Upon the armature is carried the said From this, uprights or posts I) sup bell-tapper c, mounted by means of its stem c on a laterallyrojecting portion of the An a justable weight '7' is positioned upon the stem 0, being secured in place by a small screw, This weight maybe used for adapting the bell to the purpose of selective signaling, a) increase the impact of "the bell-tapper, or it may be omitted altogether.

" Beneath the head of the screw 61, I may secure a spring 7r, bearing upon one side or the other of the oscillating armature, and.

thereby provide the simple means shown in Fig. 3 for giving bias to the bell. This flat spring Zc may be swung beneath the screw head, so as to bear upon either end of the armature, and adjust the bias thereof to either side, thus avoiding any change or crossing of the connections after the bell is installed. In Fig. 7,1 have shown a modified biasing-spring 7c, which is the tension of said spring as required.

'-In additiongthere are shown further modified features in that the armature itself is rovided with an adjusting-screw k adapts to varyemployed to secure selective actuation.

Saidf armature is made, much larger and heavier, and is tapped-at g to receive weights m, which may be adjusted in different positio'ns along its length. This bell is adapted for use withheavy signaling currents, and some of itsparts, including the s ring i, are made heavier to adapt the bell't ereto.

It will be understood that the weights and 'm may be made heavier or lighter to suit given conditions, and may be used together or alternat vely, as desired.

Each of the figures of the drawings illustrates some features of the im roved support or mounting for the be l-armature, which I will refer to a little more in detail. The armature g is provided with off-set V- shaped recesses g g in its u per and lower faces, which are in exact ainement. The usual pins g are inserted in its extremities for overcoming the tendency to stick to the magnet poles. The yoke f affords two 0 en ings f, which slip loosely over the poles of the elcctro-magnets Z; said'yoke being provided midway with two acute-angled or V-shapd bearing-points f Similar bearing-points h are rovide'd upon the outer scale-bearing h. hese bearing-points respectively register with the recesses provided in the armature, and mount the latter in an extremely sensitive manner before the opposing oles of the electro magnet, and within the field of the permanent magnet, so that the armature maybe oscillated under the influence of a minimum current.

The screw (1 opposing the force of the coiled spring 6, operatively and adj ustably secures these parts together in a manner avoiding any lost motion, and at the same time preventing the loosening of the armature. Moreover, the scale-bearings are held firmly in alinement by the spring, and the bell-tapper is thus afiorded a 'rigid, yet

easily actuated mounting, wherein to oscillate under the influence of the energized electro-magnets. Other means, however,

- may be employed instead of the spring, for

holding the bearings securely in alinement and in close engagement with the armature.

The structure described will be found very advantageous, used either with the biasing s ring, with the adjustable weight, or with t ese arts altogether omitted; depending upon t e character of the circuit and ringing current employed in conjunction therewith.

It will be ap reciated from a consideration of theforegoing, that the improved mounting for the armature set forth, is one permitting the freest play or oscillation thereof in any bell or similar electro-Inagnetic appliance.

. Having now described the preferred em bodiment of my invention, and the construction and operation thereof l claim as new, and desire to secure by Letters Patent,

stantial] y as set forth.

2. In an electro-magnetic appliance, the

combination with the electro-ma net thereof,'of an oscillating armature positioned before its poles, scale-bearing parts engaging the outer and inner faces of said armature, an adjusting screw, and an opposing spring inaintainin said parts in operative relation, substantial y as set forth.

3. In an electro-magnetic bell, the combination withthe actuating electromagnet, of an armature mounting the 'bell-ta per, a mounting for the armature avoiding ost 'motion and ermitting its free oscillat1on under the impu se of the electro-magnet, and an adjustable weight slidably mounted upon the bell-tappcr for adapting the bell to selective actuation by predetermined currents, substantially as set forth.

4. In an electric bell of the class described,

"before its pole-pieces, a bell-tapper carried by the armature, inner and outer scale-bearings, and a spring and opposing adjustingscrew for maintaining the armature and its bearing-parts in close engagement, substantially as set forth.

6. The combination in'a selectively-actuated electric-bell, with the electro-magnet traversed by the selective signaling current, an armature, a bell-tapper carried thereby, an adjustable weight associated with the bell tapper, and a rigid oscillating-mounting for the armature, comprising inner and outer scale-bearings, an adjusting-screw and an' opposing spring maintainin the parts in c ose engagement, substantia ly as set forth.

7. The combination in a selectively-actuated electric-bell, with the electro-magnet traversed by selective signaling currents, of a relatively heavy armature, a bell-tapper carried thereby, an adjustable weight associated therewith and also carried upon the armature,- and elevated scale-bearing parts and opposing means for mounting the armature thereof, of an oscillating armature positioned 1 before the electro-magnet to be actuated thereby, substantially as set forth.

8 In an e'lectro-magnetic appliance, the combination with electro-magnets, of an at;-

mature mounted before the same and a bear ing for said armature, comprising outer and inner alined scale-bearing parts permitting the free oscillation of the armature before the poles of the magnet, while holding it firmlyin lace, substantially as set forth.

9. In a iased electro magnetic appliance, the combination with thefelectro-magnet 'beforeits poles, scale-bearing parts engaging the outer and inner faces of said armature, a

' biasing spring adapted to be brought into engagement with either end of said arma-' ture,- and means for securing said parts in close operative engagement, substantially as set forth( 10. In a selectivelyactuated signaling bell, the combination with its actuating elecvtro magnet, of a relatively heavy armature I positioned before the same, a bell-tapper carried thereby, adjustable weights adapted to be secured along the armature, and scalebearing parts engaging the outer and .inner faces of said armature to permit its free oscillation before the electro-mag'net, substantially as set forth. v

11. In an electro-magnctic ap liance, the combination with the actuating e ectro-magnet, of a vibrating armature positioned before said electrdmagnt, scale-bearing parts engaging the inner and outer faces of said armature, and means for retaining the scalebearings and armature closely in 'engagement and aline'ment, substantially as set forth.

- 12. Inan electro-magnetic' appliance of the class described',; the combinat'lon'with the actuating electro-magnet thereof, of an oscillating armature positioned before its 'poles and centrall grooved or recessed, outer and inner scaleearing arts engaging therecessed armature, an means for maintaining the armature and scale-bearings closely inanga 'ement and in proper alinement, substantiaIly as set forth. 1 13. In an electro-magnetic appliance, the combination with the double-pole electromagnet thereof, of an oscillating armature positioned before its poles, a scale-bearing for the armature, and a spring-mounting engaging said armature centrally to hold it securely in position, but permitting its free oscillation, substantially as set forth.

14, In an electric bell adapted for alternating currents, the combination with its electro-magnet, of an armature ositioned before the oles thereof, and carrying a belltapper, an a mounting for said armature, provided with scale-bearing parts, en aging said armature upon one of its faces at istant.

points approximating its full width and bearmg upon the other face as well, for holding I the armature securely in position, substan tially as set forth.

15. In an electric bell'of the class described, the combination with the actuating electro-magnet, of an oscillating armature positioned before its pole-pieces, a bell-tap per carried bygzhe armature, inner :and outer ali'ned 56. 16 ari ture upon oife or t e either of its faces substantially throughout its 'entire' width; and

means for maintaining saidarmature and itss engaging said arma'

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