US757826A - Telephony. - Google Patents

Description

No. 757,826. PATENTED APR. 19, 1904. A. MEINEMA. TELEPHONY.

APPLICATION FILED JAN. 16, 1904. H0 MODEL.

7titrwaacxsz'- EL. J fiircutof n4 eri V w 25 ,Zr fz w u UNITED STATES Patented April 19, 1904.

PATENT OFFICE.

TELEPHONY.

SPECIFICATION forming part of Letters Patent'No. 757,826, dated April 19, 1904.

Application filed January 16, 1904. Serial No. 189,328. (No model.)

To (LZZ whmn it may concern.-

Be it known that I, ALBERT MEINEMA, a'citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois,

have invented a certain new and useful Improvement in Telephony, of which the following is a full, clear, concise, and exact descrip- "tion, reference being had to the accompanying drawings, forming a part of this specification.

My invention relates to telephony, and has for its object the provision of an improved i system of selecting-stations upon party-lines and provides means whereby the signal-bells at unselected stations are not only prevented from being rung, but whereby telephones at such stations are prevented from being cut result being preferably accomplished both with regard to the receiver and the transmitter when the telephone-receiver is removed from its switch-hook.

I will explain my invention more fully by reference to the accompanying drawings, in which Figure 1 is a diagrammatic view of the preferred embodiment of my invention. Fig. 2 is a View of a portion of the apparatus shown in Fig. l in another position of adjustment. Fig. 3 is a side elevation of the switch-controlling wheel.

Like parts are indicated by similar characters of reference throughout the different figures.

I have indicated in Fig. 1 enough of atelephone-exchange system to render an understanding of my invention clear. In said figure I have disclosed a party telephone-line extending by its limbs a and b to an exchange, where they terminate in the line-springs of a spring-jack 0, which when unengaged by a plug are in circuit with the 'annunciator d. At the exchange there is illustrated an ordinary connecting-plug 0', whose sleeve is normally in open circuit with a grounded calling-generator e and Whose tip may be connected with a battery 6 or a battery 0 by the operation of the key 0 or the key a, one pole of each of these batteries being grounded. The batteries serve to direct current over the limb f in opposite directions. At each of the substations of the party-line a b there is located an electromagnetic apparatus having two magnet-helices ff, which may be organized in a unitary structure. In the construction illustrated the magnetic device f f includes a permanent magnet f that serves or tends to magnetize the soft-iron cores of the helices ff to cause the same to present similar poles to the oscillating soft-iron armature f The helices f f are difierentia'lly wound and may have such direction with respect to the polarities of the soft-iron cores and the batteries that when the key 0 is depressed the actuating element g will be moved toward the right, causing the arm by its engagement with one of the pins g to effect a clockwise rotationof the wheel 9? and an advance of the insulating-block g, carried by the wheel g one step, this wheel being advanced against the force of the helical spring When the key a is depressed, the key 6 being open, the current through the helices f f is reversed, causing the actuating element g to be moved in a reverse direction, whereby the pin g, carried upon the arm 9, 5 will engage the detent g and remove its nose from the path of the pins g permitting the spring to restore the wheel g to its initial position, this position being defined by means of a finger engaging a stationary block g. 9 It will be understood that the blocks g upon the different wheels g at the different stations occupy differing distances fromthe finger g so that no two fingers occupy the same relative operative positions. It is obvious that while a number of depressions of the key a is necessary to set wheels g but one operation of the key a is necessary to release the wheels and permit all of them to be restored to their normal positions In the normal po- I00 sition of each wheel the enlargement h of the wheel is placed opposite the contact-springs Z 79 and the button Z. In this position a bodily transverse movement of the wheel, which is permitted because the mounting of the wheel is capable of reciprocating upon the slide m, will effect first a closure of the springsvl and is and thereafter the engagement of the spring Z with the button Z. At a calling-station a subscriber removes his receiver, and thereby effects connection of the parts 2' and Z, the said mitter-circuit being closed at 10, as is well un-' derstood to those skilled in the art.

In Fig. '1 the receiver n is supposed to be on the switch-hook, as indicated in dotted lines. In Fig. 2 the said receiver is removed.

The-operator in selecting a station depresses the suitable key 0 the number of times necessary to place the block g into line with the free ends of the springs 2' k and the button Z. The operator does not accomplish any bodily movement of thewheel g and I therefore make the finger 9 longer than the finger it, so that said finger g may effect engagement of the parts i is, it being unnecessary for the operator to effect connection of the partsz' and Z, as this may be done by the called subscriber when he removes the telephone from its switch-hook. When the parts 2' and k have been connected by the operator, the key a is depressed to include the operators signal-generator e in circuit with the limb a, that is now in electrical connection with said parts Z k, the serial contacts q, and the receivingbell 1". When the called subscriber responds, the circuit through the signal-bell r is open at contacts q. The telephone-receiver n is included in bridge of. the limbs a Z) by reason of the closure of the contacts and Z, the transmitter-circuit being closed, as previously specified. When the switch-hook is relieved of the weight of the receiver, the helices ff are I thus provide in a very simple form switching apparatus controlled jointly by the operator and subscriber that will permit signaling from a calling-station and the inclusion of the telephone-receiver at calling and called stations in circuit with the telephone-line, will permit the operation of the signaling-bell at a called station independently of the remaining bells upon the line, and will only permit of the inclusion of the telephone-receiver at a calling or called station in circuit with the telephone-line whereby the function of a secrecy-switch at each station of a party-line is performed.

I have shown preferred mechanical constructions and circuit arrangements; but I do not wish to be limited thereto,-as changes may readily be made without departing from the spirit of my invention; but, 7

Having thus described my invention, I claim as new, and desire to secure by Letters Patent, the following: r

1. In a selective signaling telephone system, the combination with a telephone-line extending to an exchange, of a bodily-movable switch-- actuating appliance at a substation of the line controlling the telephone-circuit, electromagnetic mechanism at the substation for operating said switch-actuating appliance, switching mechanism at the exchange for operating said electromagnetic mechanism whereby said switch-actuating appliance may be set in position to close the telephone-circuit controlled thereby, and a telephone switch-hook also controlling the said telephone-circuit serving when released to bodily move said switch-actuating appliance and to complete the closure of the telephone-circuit, substantially as described.

2. In aselective signaling telephone system, the combination with atelephone-line extending to an exchange, of a bodily-movable switchactuating appliance at a substation of the line controlling the telephone-circuit, electromagnetic mechanism at the substation for operating said switch actuating appliance, switching mechanism at the exchange for operating said electromagnetic mechanism whereby said switch-actuating appliance may be set in position to close the telephone-cir: cuit controlled thereby, a telephone switch: hook also controlling the said telephone-circuit serving when released to bodily move said switch-actuating appliance and to com-.

plete the closure of the telephone-circuit, a signal=receiver at said substation, and a switch controlling the circuit of the signalereceiver closed by the aforesaid switch-actuating ap pliance when actuated by the operator, sub stantially as described,

3; In a selective signaling telephone system, the combination with a telephone-line extending to an exchange, of a bodily-movable switchactuating appliance at a substation of the telephone-line, electromagnetic mechanism at the substation for operating said switch-actuating appliance to close the circuit through the sig- IIC nal-receiver at said station, switching apparatus at the exchange for operating said electromagnetic mechanism, and a telephone-receiver switch hook serving to engage said switch-actuating appliance to move the same and thereby effect closure of the telephonecircuit, substantially as described.

4. In a selective signaling telephone system, the combination with a telephone-line extending to an exchange, of a bodily-movable switchactuating appliance at a substation of the telephone-line, electromagnetic mechanism at the substation for operating said switch-actuating appliance, said switch-actuating appliance including a rotating member carrying two pins g* it of unequal effective length, circuit-controlling springs or elements is included in the signal-receiver circuit at said substation and adapted to be closed by one of said pins and a telephone contact element Z, the other of said pins serving to connect the three contact elements I: and Z, substantially as described.

5. In a selective signaling telephone system, the combination with a telephone-line extending to an eXchange,of a bodily-movable switchactuating appliance at a substation of the telephone-line, electromagnetic mechanism at the substation for operating said switch-actuating appliance, said switch-actuating appliance in-- cluding a rotating member carrying two pins g 72 of unequal length, circuit-controlling elements 2' 712 Z controlling the telephone-receiver and signal-receiver circuits and adapted to be controlled by such switch-actuating appliance, partially by the switching mechanism at the exchange to effect closure of the signal-receiving circuit, the switch-hook serving to effect bodily movement of the said switchac-- tuating appliance to effect closure of the telephone-receiver circuit, substantially as described.

6. In a selective signaling telephone system, the combination with a telephone-line extending to an exchange, of a bodily-movable switchactuating appliance at a substation, electromagnetic mechauism at said station for operating said switch-actuating appliance, switching mechanism at the exchange for operating said electromagnetic mechanism, contact elements controlling the telephone-receiver and signal-receiver circuits at said substation, two of said elements being adapted for engagement through the agency of said switch-actuating appliance when operated from the exchange to effect closure of the signal-receiving circuit, and a switch-hook adapted to effect bodily movement of the switch-actuating appliance to cause the remaining contact element to close the telephone-receiver circuit, substantially as described.

In witness whereof I hereunto subscribe my name this 14th day of January, A. D. 1904:.

ALBERT MEINEMA.

Witnesses:

JOHN M. STEKETEE, CHARLES WATERMAN.

Images