US553843A - Telephone - Google Patents

Description

(No Model.) 7 2 Sheets-Sheet 1. s. A. DINS1VIORE.

- V TELEPHONE. 7 NO. 553,843. Patented Feb. 4, 1896.

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(No Model.) 2 Sheets-Sheet 2.

S. A. DINSMORE. TELEPHONE.

No. 553,843. Patented Feb. 4, 1896.

UNITED STAT S PATENT OFFICE.

SAMUEL ARTHUR DINSMORE, OF CHICAGO, ILLINOIS.

TELEPHONE.

SPECIFICATION forming part of Letters Patent No. 553,843, dated February 4, 1896. Application filedMarch 8,1895- Serial No. 540,973. (No model.)

To all whom it may concern.-

Be it known that I, SAMUEL ARTHUR DINS- MORE, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain Improvements in Telephone Devices, of which the following is a specification.

My invention relates to telephones, and has for its object to provide automatic means for preventing the granulated carbon of the transmitter from packing or otherwise getting into a condition where its efliciency is impaired. This object I accomplish by the means hereinafter referred to, and which consist essentially and broadly considered of devices whereby when the telephone is brought into use, or particularly when the telephone is operated so as to gii e the call-signal to the instrument at the other end of the line, the granulated carbon will necessarily, but automatically, be moved, disturbed, or shaken up so as to prevent its packing and to avoid the impairment of its efficiency.

It will be observed that my invention can be readily applied to all kinds of telephones where granulated carbon is employed in the transmitter, and it will be equally evident that as to the mere devices employed they may be quite readily altered without departing from the spirit of my invention.

I have illustrated a particular form of my invention which consists of certain devices operated by means of the crank by which the signal-bell is set in operation in a large class of the ordinary telephones. I have also in a more general way indicated diagrammatically the application of my invention to a case where the crank is not used, and where the granulated carbon is shaken up from either end of the line in the ordinary process of giving the call.

I will now describe in detail the particular form of my invention which I have illustrated.

Figure 1 is a front elevation with parts broken away. Fig. 2 is a similar side elevation. Fig. 3 is a diagrammatic illustration of the circuits of the devices of Figs. 1 and 2. Fig. 4 is a diagrammatic view of a telephone in which the call is given by a battery and switch rather than-by a magneto-generator and crank.

Like parts are indicated by the same letter in all the figures.

A is the receiver.

B is the case which contains the transmitting mechanism.

C is the call-bell; D, the magnets which operate it.

E is the magneto-generator; F, the crank for operating the same. Associated with this crankis the gear G adapted to mesh with the pinion H whereby the magneto-generator is driven.

The gear G has a pin J projecting into a position whereby in the course of its excursion it engages the arm K of the lever which is pivoted at K and provided with the arm K and the retracting-springK The arm K engages the teeth of the ratchet-wheel L, which ratchet-wheel is engaged by the dog M. This ratchet-wheel is made part of a ring N which contains the insulated cup N, which cup contains the granular carbon and the diaphragm N There may also be a carbon block or rosette. In short the arrangement and character of the contents of the cup or the peculiarities of the transmitter are no part of my invention, so long as the transmitter contains as an element thereof the granular carbon which is to be prevented from packing.

' O is the mouthpiece; O, a thimble or tube at the base of the mouthpiece and forming the lining for the aperture back of the mouthpiece.

0 is an outwardly-projecting tubular portion rigid on the ratchet-wheel L and resting within the thimble, which serves as a bearing therefor. The ratchet-wheel L is held in position by the lugs 0 0 The circuits may be traced in Fig. 3. P is one binding-post, whence leads the conductor P to the hook P on which the receiver A hangs. This hook is in contact with the terminal P when the receiver is hanging on the hook, and from the terminal leads the con ductor P to the magneto-generator, whence leads the conductor P through the magnets D D to the bindin g-post or terminal P IVhen the receiver A is removed from its hook the latter rises into contact'with the two terminals R and R,'and the circuit established may be traced as follows: from R the battery, by conductorlt through the primary of the induction-coil R thence by the conductor R to the terminal R, along the hook P to the terminal R, by conductor R to the terminal R which engages the contact R of the transmitter, and thence through the transmitter and the granular carbon thereof to the ratchet-wheel L, thence to the terminal R", thence by conductor It to the battery.

The secondary or talking circuit, which is established when the hook is raised and the machinery freed therefrom, may be traced as follows: from binding post I along conductor P, along the hook P to terminal R, thence on the conductors S through the receiver to the secondary coil of the inductioncoil R thence by conductor S to conductor P, and thence to the binding-post P Referring now to Fig. 4:, I will describe the circuits of a device or arrangement wherein my invention is illustrated under difierent conditions.

T is a binding-post whence leads the conductor T to the hook T on which the receiver T is supported. The hook engages when down the terminal T whence leads the cond uctor T to the magnets T, whence leads the conductor T to the switch T whence leads the conductor T to the call-bell C, and thence to the conductor T and to the binding-post T. Now the magnet T has exposed to it one end of the lever T, which thus serves as an armature. This lever is pivoted at T and one end is associated with the retractingspring T and the other en (1 with the dog T to drive the ratchet-wheel L. The talkingcireuit and the primary or battery circuit in this diagram are or may be practically the same as the like circuits in diagram Fig. If now the telephone of diagram Fig. 4; be provided with the switch T and battery for giving the signal-call, instead of the crank and magneto-generator, the circuit will be as follows: Proceeding from T to T ,'as above described, we assume that the switch is in the position shown in dotted lines, whence the circuit is continued from switch T by conductor U through battery U, by conductor U to conductor T to terminal T Instead of the switch T I may place a contact in the path of the receiver-hook so that a circuit will be momentarily completed by the movement of said hook, due to the rem oval and replacement of the receiver. In indicating this construction in Fig. 4., for convenience I have shown the signal of the person to be called and the magnet that moves the receiver as connected in multiple.

IVhen the lever T comes in contact with the contact V the circuits are traced as follows: from battery U to wire U where it divides, part going out on the line to the instrument of the person called through their signaling apparatus, thence back to T, then by wire T, contactV, and wire V to the battery. The other portion goes by wire V through magnet T", thence by wires T V, contact V, lever T and wire V back to the battery.

It is evident that I may obtain the desired result in many different ways, and I therefore do not wish to be limited by the arrangement herein shown and described.

The use and operation of my invention are as follows:

Referring to that particular form of the invention illustrated in Figs. 1., 2 and 3, it is plain that when the crank is operated to drive the magneto-generator and thus sound the bell at the instrument of the person sought to be called, the gear-wheel G will rotate, and by the engagement of the pin J with the arm K of the lever will rotate the ratchet-wheel L or move it a short distance an d thus turn the transmitter on its bearing and cause the granulated carbon therein to shake about and the particles to move their relative positions.

In Fig. 4 the means for thus shaking the transmitter are shown to be electrically operated. \Vhen the call is to be given to the person with whom communication is desired, the switch T may be operated so as to put the battery U in circuit with the bell or other calling device of the person to be called. At the same time the battery U is brought in circuit with the magnets T", so that as the call bell is rung the magnets are energized and the ratchet-wheel with its associated trans mitter is rotated by means of the lever. These are some of the means by which the transmitter may be so agitated.

I claim- 1. In a telephone having a transmitter c011- taining granulated carbon, the combination of means for agitating such carbon with means for giving the call-signal to the telephone with which communication is sought, and connections between them whereby the agitating mechanism is responsive to the callsignaling mechanism.

2. The combination in a telephone having a transmitter containing granulated carbon of a call-circuitoperating device provided with a projection, a pivoted lever having one end in such a position as to be engaged by said projecting part when the call-circuit-opcrating device is moved, the other end of said lever being connected with the transmitter whereby said transmitter is moved by the movement of the call-circuit-operating device.

3. In a telephone containing a transmitter consisting in part of granulated carbon, the combination of a carbon-agitating mechanism with a call-bell-operatin g mechanism containing a magnetogenerator and connections from such call-bell-operating mechanism to the carbon-agitatin g mechanism, so that when the former is operated the latter is set in motion.

Signed at Chicago, Illinois, March 5, A. D. 1895.

SAMUEL ARTHUR DINSMORE.

In presence of- J OHN II. OoULTER, FRANCIS M. IRELAND.

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