Bell (device)

“ If the bells are single stroke bells, they work very well in series; but, to get trembling bells to work in series, it is best to adopt the form of bell recommended by Mr. F. C. Allsop. He says: "Perhaps the best plan is to use the form of bell shown at Fig. 82, which, as will be seen from the figure, governs its vibrations, not by breaking the circuit, but by shunting its coils. On the current flowing round the electro-magnet, the armature is attracted, and the spring makes contact with the lower screw. [Pg 164] There now exists a path of practically no resistance from end to end. ”

“ I started from my chair and listened intently, but the ringing had stopped, and I settled back to the delights of a nervous chill, when again the deathly silence of the night—the wind had quieted in time to allow me the use of this faithful, overworked phrase—was broken by the tintinnabulation of the bell. This time I recognized it as the electric bell operated by a push-button upon the right side of my front door. To rise and rush to the door was the work of a moment. It always is. ”

“ Gray's transmitter is supposed to have been suggested by the very old device known as the 'lovers' telephone,' in which two diaphragms are joined by a taut string, and in speaking against one the voice is conveyed through the string, solely by mechanical vibration, to the other. Gray employed electricity, and varied the strength of the current in conformity with the voice by causing the diaphragm in vibrating to dip a metal probe attached to its centre more or less deep into a well of conducting liquid in circuit with the line. ”

“ Bell knew perfectly well that the mechanism that could transmit all the complex vibrations of one sound could do the same for any sound, even that of speech. That experiment showed him that the complex apparatus he had thought would be needed to accomplish that long dreamed result was not at all necessary, for here was an extremely simple mechanism operating in a perfectly obvious way, that could do it perfectly. All the experimenting that followed that discovery, up to the time the telephone was put into practical use, was largely a matter of working out the details. ”

“ Electric Bells.—An ordinary electric bell is merely a vibrating contact breaker carrying a small hammer on its spring, which hammer strikes a bell placed within its reach as long as the vibration of the spring continues. ”

“ It certainly [178] worked upon the principle of undulatory currents, [55] whether it articulated or not. Bell had himself, speaking in May 1876, before the American Academy of Arts and Sciences upon his researches, even more explicitly admitted the imperfections of his own instrument. ”

“ As we have seen, those electricians who worked from the viewpoint of the telegraph never got beyond the limitations of the instrument and found that with it they could transmit signals but not sounds. Bell, with his knowledge of the laws of speech and sound, started with the principles of the transmission of sound as a basis and set electricity to carrying the sound-vibrations. ”

“ A peal, in technical language, is a performance on the bells of more than 5000 changes ; and it occupies the ringers a considerable period of time, generally more than three hours. But a touch or flourish on the bells, which is the ordinary method of notifying any joyful occurrence, is round ringing varied by changes at the option of the ringers, or according to the custom of the belfry. It is usual in the first instance to set the bells ; that is, to throw every bell, with its mouth upward, in a stationary position in the frame. ”

“ About seven in the evening the signal bell for landing on the rock was again rung, when every man was at his quarters. In this service it was thought more appropriate to use the bell than to pipe to quarters, as the use of this instrument is less known to the mechanic than the sound of the bell. ”

“ They can be taken round as many corners as you wish without losing any of their conductivity, and be placed wherever is most convenient for examination. One bell may serve a large number of rooms if an indicator be used to show where the call was made from, by a card appearing in one of a number of small windows. Before answering a call, the attendant presses in a button to return the card to its normal position.
In Fig. 52 we have a diagrammatic view of an electric bell and current. ”

“ The bell is an ordinary electric bell, and is rung by the regulating clock, which closes the circuit at the instant the signal is desired. The flashing-signal consists of a red vertical disk on a vertical axis, which normally shows only its edge, but is made to revolve once on its axis in four sudden jumps, by simple mechanism in connection with electro-magnets, when the regulator, by closing the circuit, sends the current. ”

“ So rapidly has the use of electric bells and similiar signalling appliances extended, in modern houses, offices, hotels, lifts, and ships, that every bell-fitter must have felt the need of accurate knowledge of the manner in which these instruments act and are made. ”

“ But on March 10, 1876, the new instrument actually talked. Watson, who was at the basement end of the wire, heard the disc say, “Mr. Watson, come here, I want you.” He dashed up the three flights of stairs to the room in which Bell was. “I can hear you!” he cried. “I can hear the words!”
“Had I known more about electricity, and less about sound,” Bell is reported to have said, “I would never have invented the telephone.” He had come upon his discovery by the right path, but it was a path that very few men could ever have picked out. ”

“ One man can, as a rule, chime three bells, with a rope in each hand and one foot in the loop of another; but by the use of an “Ellacombe” or other chiming apparatus one man can work six, eight or ten bells. Some prefer the quieter sound of chiming as an introduction to divine service, but where a band of ringers is available and change-ringing is practised the bells as a rule are rung. The practice of “clocking” a bell, in which the clapper, by means of a cord attached to it and pulled from below, is allowed to swing against the bell at rest, is often employed to save trouble ”

“ It is frequently necessary to have an electric bell which, when once started, will continue ringing until it is stopped. Such bells are used for fire and burglar alarms and for many other similar purposes, and they are called continuous-ringing bells as distinguished from the ordinary trembler bells. ”

“ But Bell’s thin steel tongue, though it has its own fundamental note (and so has every tympanum, for that matter) when left free to vibrate in its own time, will reproduce any other note or sound that may be forced upon it by the varying attraction of the electro-magnet. There is, indeed, the whole difference between “free” and “forced” vibrations. One of the strangest delusions that has somehow grown up in recent telephonic discussions is the almost incredible proposition that a tongue cannot talk because it is a tongue. ”

“ In the old system, which has been largely superseded by pneumatic and still more by electric bells, the bells themselves are of the ordinary conical shape and are provided with clappers hung loosely inside them. Being supported on springs they continue to swing, and therefore to give out sound as the clapper knocks against the sides, for some time after they have been set in motion by means of the strings or wires by which each is connected to a bell-pull in the rooms. ”

“ Bell knew the field of his work in a general way, but he had not yet decided which path to choose of several that looked as if they might lead across it. His far-distant goal was to construct a machine that would carry, not the dots and dashes of the telegraph, but the complex vibrations of the human voice. ”

“ Bells are struck in three ways,— (1) with a hammer on the outside, let off either by a tambour or revolving drum, similar in appearance to the prickly cylinder of a musical box, which drum can be fitted with tunes or chimes by musical nuts or spikes, and altered at will; (2) the bell can also be struck by hand, as in the common stand of small bells to be seen occasionally in the London streets, the player having a hammer in each hand; or (3) the clapper may strike the bell internally, either being pulled by a rope, the bell being stationary, or by the bell swinging to and fro. ”

“ And for this there can be no better plan than to note upon paper the changes which may be made with from 2 to 4 bells, assuming that one, which may be represented by a cross, star, or other mark, is the bell which the student takes to move, vary, or change. Whether he takes the position of 1, 2, or any other number, No. 1, in a ring of church bells, is always that with the highest note, and in this way it will be plain, first, to presume that there are 2 bells, and the reader takes the second, upon which there are, as he knows already as shown, but two changes ”

“ Although I do not recollect where the hand bells are used in town, yet I have more than once lately heard it mentioned in Fenchurch-street and its neighbourhood, that the ringers were in the practice of amusing themselves with hand bells at a public-house where they assembled for the purpose of practising; and it is more than probable, that some of your readers in that neighbourhood can furnish you with further particulars.
In most of the towns in the west of England, they have a custom of ringing one of the church bells (generally the treble bell) in the morning and evenings. ”

“ The contact screw was screwed down so far that it made permanent contact with the spring, so that when I snapped the spring the circuit had remained unbroken while that strip of magnetized steel by its vibration over the pole of its magnet was generating that marvelous conception of Bell’s—a current of electricity that varied in intensity precisely as the air was varying in density within hearing distance of that spring. ”

“ At all times when it may be desired to produce a good performer upon any musical instrument, it is well that he should understand the instrument itself; for just as the driver who understands his steam engine thoroughly in its parts and details, is the man who can work it best, so is it with the ringer with his bell in the steeple or tower. ”

“ The funds for this work were supplied by Sanders and Hubbard jointly, but they insisted that Bell should continue his experiments with the musical telegraph. Though he was convinced that the opportunities lay in the field of telephony, Bell labored faithfully for regular periods with the devices in which his patrons were interested. The remainder of his time and energy he put upon the telephone. The basis of his telephone was still the disk or diaphragm which would vibrate when the sound-waves of the voice were thrown against it. ”

“ If we suppose that there are a great many bells precisely similar to each other, and that they are struck, first one and then another, in a perfectly irregular manner, yet so that, on an average, as many bells are struck in one second of time as in another, and also in such a way that, on an average, any one bell is not again struck till it has ceased to vibrate, then the audible result will appear a continuous sound, composed of the sound emitted by bells in all states of vibration, from the clang of the actual stroke to the final hum of the dying fundamental tone. ”

“ Musical hand bells are the most handy for the practice of time, place, and position, and should accompany every ring of church bells anywhere and everywhere for this purpose, so much may be practised upon them in the quiet and comfort of a home fireside. But in ringing rounds on the bells of the church in the tower, every bell must be set at the start, and should be brought round to the hand stroke, as shown in the cut on page 15. ”

“ If we have a house with one bell, and ten wires each fastened to a door running to the center, all having wire connection and so arranged that to pull any one wire will set the bell in motion, and without an indicator you cannot tell which wire is disturbed, producing the effect or ringing of the bell at the center. ”

“ A current of electricity sets a small hammer in motion, and, in the dark, the stream of sparks between the hammer and bell is clearly visible. In a word, then, it is plain that the whole of civilized life is set to bell music in one shape or another ”

“ Still, in practice, to judge by the instruments used in the telephone exchanges of Great Britain, the Blake transmitter with its liability to make-and-brake abruptly is a more satisfactory instrument than the Bell transmitter, which is not used at all. Now the Bell transmitter [169] working on the principle of which Bell is the first and undisputed inventor, is one in which the degree of contact in the circuit is never changed: for it works by the principle of “induction,” whereby currents are set up in a circuit that is never opened or closed, either partially or wholly. ”

“ Portable Electric Combination Bell is a unique invention combining a table call bell, invalids’ bell set, burglar alarm and fire alarm, and for usefulness, compactness, and finish, far surpasses anything of the sort hitherto introduced. The distinct advantage of the portable combination bell will at once be seen when it is stated that the whole apparatus, including battery, and all other parts complete, occupies no greater space than 31⁄2 in., and as the battery contains no fluid, the bell can be safely packed in portmanteau or travelling bag. ”