US942401A - Portable telephone. - Google Patents

Description

0. L. MULO?.

PORTABLE TELEIJHONB.

A1 PLI0ATI0N FILED 00T. 12. 190s.

@gpg D' l Faented Deo. 7, 1909. 'y 2 SHEETS-#SHEET 1.

. 4 A 35W ,s ma i) @mi Stmme-4j 0. L. MULOT'.

PORTABLE` TELEPHONE.

APPLICATION FILED 0CT.12,190B. @g e Patented Dec. '7, 1909.

2 SHEETS-SHEET 2.

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oT'ro LOUIS iv'iULoT," or BROOKLYN, NEW YORK.

PORTABLE TELEPHONE.

Specification of Letters Patent.'

y Patented Dec.' 7, i909.

Application filed October 12, 1908. Serial No. 457,409.

l To all whom it may concern:

Be it known that I, OTTO L. MULo'r, a citizenlof the United States, residing at Brooklyn, in the county of Kings and State of'rNeW York, have invented new and useful `Improvements in Portable Telephones, of

Which the following is a specification.

, My inveiitio1i-relates to telephone instruinents, and more particularly, to instruments of the portable type.

With the usual practice of installing a telephone at a fixed point in a building, great inconvenience is frequently caused by the necessityof a person being obliged to go to this fixed point whenever desiring to use the instrument. For example, in private dwellings, where the telephone is usually located on the lower floor, and the bed rooms on the uppertloors, the instrument is q uite inaccessible, should any member yof the family desire to use the same during the night. And it sometimes happens, that, in:

casewof tire or burglars, under these conditions, it is entirely impossible to reach the telephone at all.

lIt 1s t-he primary object of the present in: vention, therefore, to provide 4a telephone set that may be i'eadily'lniovcd froinplace toplacc, andA connected to the outgoing circuit wherever desired.

LA further object of the invent-ion is to provide a telephone set of this nature and so wire aA building that the instrument may be connected to the line at any one of a plu- ,rality of` points, Without the necessity for a localswitcli board.

Avifurthcr object of the invention is to construct a self-.coiitaiiicd, portable telephone set of -the `desk stand type, whichshall be light andvcompact, and capable of being easily moved about.

zlyitlithe above and other objects in view, and to improve generally upon the details of construction ofsuch apparatus, my invention consists ofA the, construction and arran,`geincnt.l of.,v parts hereinafter described.

and ilustrated inthe accompanying draw.-

ings, in which ip Figure. 1l issan elevation, showing my inivMprovedftelephone set, complete as it appears,

ready for use. Fig. 2 is a front v iew of one of the ,sockets or receptacles hereinafter deillustrated in Fig. 5.

scribed. Fig. 3 is a transverse section therei of, showing a slight modification. Fig. 4 is a top plan view of the connecting plug, hereinafter referred to. Fig. 5 is a View of the stand itself, showing the parts thereof separated. Fig. (S is av vertical sectional view of the base of the stand, yon an enlarged scale. Fig. T is a horizontal section thereof. Fig. 8 is a diagram of circuits.

Referring to the drawings .in detail, the baseof my improved stand is designated by the reference numeral 1. As clearly shown, this base is in the shape of the frustuin of a pyramid, having a quadrangular, aiid preferablyv square bottom. The post or standard of my instrument is split vertically intov two sections or halves, 2, 3, one of which, such as i2, is rigidly secured to, and

preferably formed integral with the base 1.

At the junction of the standard and post l preferably forni a boss l, having a socket adapted to receive the endy of the othervsec tion 3, of the standard. l The lower end 3,

of this section 3. is rounded on one side', as l shown in Fig. t3, in order to permit of its occupying ythe inclined or open position t designates'tho usual transmitter, and 5 the receiver, which' is supported upon a receiver hookti, as iscustomary in sets of the desk stand type. M

llaeh section 2 and 3 terminates at its upper end in a prong T, which prongs, when titted together form a crotch for the recep tion of a flug on the transmitter.y A screw 8` passes through the prongs 7, and serves the double purpose of holding` the sections 2, 3, together. andofmaintaining the transmitter in position.'

Instead of arranging the ringer in a sepa',-

rate box. as is the con'nnon practice,'1 mountv it directly in the base of thex stand. 1,0, 10, designate bellsof the usual type, secured,

by means of screws11, to one vof the faces of the pyramidal base. These screws lare preferably lperpendicular to the said face, and, at their inner ends, may be set into. suitable nuts, pr into a block l2, which ma serve as a? yokcfor the ringer magnet coi s 13. These ringer coils are of the ordinary, -r

or any suitable construction, and seive t0 operate the usual .hannner ll, carried by the rocking armature 15, pivoted in a bracket 16, secured tothe inside of the base. The condenser, 17, required in common battery systems of telephony,.is also mounted in the base, and may be attached to a removable bottom 9, secured to-the base by means of screws. The construction above described is to be regarded as illustrative only, since the exact details are immaterial, so long as the broad idea is preserved, viz. the mounting of both condenser and ringer in the base of the instrument.,` Other vdetails lof construction and arrangement will readily suggest themselves to those skilled in the art, and may be resorted to without departing from the spirit of the invention, or the scope of the appended claims.

An important feature of` the invention resides in the disposition of the induction coil. This I arrange Within the hollow post 2,v 3, of the stand, as indicated at 18 in Fig. 5, and secure it in place by means of screws I 20, passing through lugs or brackets 19, at-

tached to the section 2.

vThe usual cord 21, extends from the base to the receiver, and a second cord extends from the base to a plug ot connector. This v plug preferably comprises a plate 23, of insulating material, provided with a handle 24:, on one face, and having projecting :trom the other face a pair olf' metallic spikes 25, 26, and a guide pin 27. The tWo conductors, 22, and 22" of the cord 22 are connected to the kes, which thus forin the terminals 'of both 'the talking and' ringing circuits oi the portable set. lhe socket or receptacle for this plug comprises a plate 28, having openings 2t), for the reception ot the spikes-25, 26, and having a hole 3l), adapted to receive the pin 2T. linmediately back olf each opening.) is disposed al pair ot contact springs 3l, arranged so as to be normally in contact with each other, and adaptedto be forced apart by the spikes 25, 26, and make therewith a rubbing engagement. These spikes are preferably polygonal in cross-section, and may be diamond-shaped, as shown. They taper gra l.

ually from point to butt, so that they `may be' readily inserted in the receptacle.

ln Fig. 8 is shown the method ot' wiring a (say) three story house, for my system. 'l`hc line Wires, 32, 233 come in, usually near the root, and extend down to the first lloor, or to the lowcrmost point at which il'. will ever be desired to use the telephone. ()n each lloor islocated alsocket, or receptiwle, con'iprising, as shown, a pair of contacts, 31, in each side ol the circuit. Since these contact springs are normally in engagement with each other, it will be evident that the circuit, will always be closed at any receptacle not in use, and thus a continuous connection preserved.

Il`he receptacles may be set llush into the wall X, as in Fig. 1` or arranged to stand out therefrom. as shown at' 2S in Fig. 3.

It will thus be seen that 1 have provided a light, compact. self-contained, portable telephone set of the desk stand type, which may be easily carried from place to place, and connected with`the line at any desired point in a very simple manner, and it is thought the numerous advantages of my invention will be readily appreciated by those skilled in the art. i

What Iclaim is 1. A portable telephone set of the desk stand type comprising a base, a supporting postsecured therein, a transmitter carried at the upper end of said post, a receiver hook pivoted in the side of' said post, a receiver of the usual type supported by said hook. a ringer located in said base, an induction coil disposed within said post, and operative connections between said parts terminating in a single pair of conductors, said eornluctors constituting the leads for both the talking and ringing circuits, and adapted to be connected to any point of an external circuit.

A portable telephone set of th desk stand type comprising a base, a hollow supporting post secured therein, a transmitter carried at the upper end of said ost, a receiver hook pivoted inthe side otp said post and controlling the telephone circuits, a receiver of the usual type supported by said hook, a conductor cord extending from said receiver to the base of the instrument, ringer coils and a condenser disposed within said base, aninducl'ion coil located in said hollow post. operative connections between said parts` and Aa conductor cord exteuding'from said base` and 'Forming the terminals of 'both tluiringiug and talking circuits,y and provided at its end with a contact plug adapted to bel inserted in a suitable socket located at any desired point in an external circuit.

t. .\v portable telephone set of the. desk stand type comprising a hollow pyramidal base and a supporting post rising therefrom,

a transmitter and receiver supported by said post, a condenser supported next lthe bottom of said base, a ringerabove said condenser and next the lop of said base, and bells for said ringer mounted side .by side on onel 0fthe llat faces of said base.

fl. ln a portable telephone set of the desk stand type, a. supporting post split vertically into two sections, each ot said sections having at its upper end a prong, a transmitter supported between said prongs, anda siligle screw maintaining all ol'A said parts inposh lion.

ln a portable telephone set ot the desk stand type, a base, a supporliug post divided vertically into lwo sections. one olZ said'scc tions being rigidly secured to the base and supporting directly the receiver and transmtter, a socket in the base adjacent said In testimony whereof I have hereunto set section into which one end of the other seemy hand in presence of two Subscribing tion is adapted to fit, the said socket being witnesses.

relatively deep and the said end of said see- OTTO LOUIS MULOT Lion being rounded off, and means for securftnessesz ing said sections together at their ends away LEWIS LAUZER,

from said base. J UNA SAN'NZF..

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