US1010531A - Telephone instrument. - Google Patents

Description

W. F. TAYLOR & V'. DURBIN.

TELEPHONE INSTRUMENT. APPLICATION FILED MAY 17, 1909. V I '1,010,531 Y Patented Dec.5, 1911.

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y TELEPHONE INSTRUMENT.

` APPLICATION FILED MAY 17, 1909. 1,010,531, Patented 119115, 1911.

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engaging the contacts connected with they UNTTED sTATEs PATENT oEEroE.

'WALTER F. TAYLOR AND VERNON DURBIN, OF BROOKLINE, MASSACHUSETTS, ASSIGN- ORSTO HOLTZER-CABOT ELECTRIC COMPANY, A CORPORATION OE MASSACHUSETTS.

TELEPHONE INSTRUMENT.

Specication of Letters Patent.

Patented Dee. 5,1911.

Application sied May 17,1909; serial No. 499,496.

companying drawings, is a specification, like' letters on the drawings representing like parts.

Thepresent invention relates to a telephone desk instrument and is embodied in a novel construction and arrangement, the

principal purpose of which is to facilitate in-` spection and repairs.

In accordance with the invention, thein-1 strument is made of three principal parts,

viz., the base or standard, the transmitter member, which supports the transmitter and 'the switch hook on which the receiver is hung, and an inclosing shell which covers the leading-in wires and the contacts.

The base portion receives the leading-in wires which are connected to a series of spring contacts mounted on an upright support extending upward from the base, and the transmitter portion is provided with two spring contacts which are connected with the wires leading to the transmitter and are arranged to be engaged by theswitch hook when the receiver' is on the hook, and disengaged therefrom when the` receiver is taken down.

The upper or transmitter portion is provided with a sleeve which is adapted tofit over the lowerv portion, the springs carried by the upper portion then engaging ory disleading in wires so as to close the signaling circuit when the receiver 1s hung up, andto close the telephone circuit when the receiver` is taken down in the usual way.

rIhe inclosing portion consists of a'tubular member adapted to inclose .the two parts above described, and a cap at the bottom of the tubular` member which covers the extended portion of the base.

When the instrument is assembled the parts are held together by a single screw which extends through the inclosing member into the two portions of the transmit-ter` member' within. Upon removing the screw,

vthe transmitter member can be lifted out of the inclosing portion, the inclosing portion then removed, and the other parts put together again without the inclosing member, so that the instrument is in working condition; whereby it can be much more readily inspected than is the case with the ordinary instrument which has to be completely dismantled to gain access to the circuit connections.v

Figure l is a vert-ical section of an instrument embodying the'invention, showing in dotted lines the position of the upper memcondition; Fig. 3 1s a similar view, showing the parts in a different position; Fig. 4 is a section showing the several parts of the instrument with lthe transmitter member removed and the other parts assembled; Fig. 5 is a horizontal section on line v5 of Fig. 4; and Fig.. 6 is a horizontal section on line m6 of Fig. 4.

VThe base a receives the leading-in wires b through a sleeve of insulating material b2, the

said leading-in wiresbeing connected with the binding posts c which, in turn, are connected through wires b3 with a series of spring contacts cZcZ2, als and 034. The said contacts are so arranged that they tend to spread apart, the contacts d and d3, however,

which close the signaling circuit being reversed as to their contact sides, so that when left to themselves they remain in contact keeping the signaling circuit closed, (see Fig. 4). The contact springs are arranged side by side, so that if the two outer springs are .pressed toward each other, they bring all the springs into contact with the exception of the springs al and d3 which are separated on account of the reversing of the contact surfaces. The upper member A carries the transmitter e and receiver hook f, the latterv being pivotally supported between two pieces of sheet metal f2 which have two downwardly extending portions f3 to hold the pivot f4 on which the receiver hook f is mounted; and two other forked extensions f5 to which are connected the Contact springs f6 which are in electrical contact lwith the conductors f7 which lead to the transmitter. When the upper and lower members A and B, respectively, are together, the spring members f6', if left free, engage the outer contact springs d and d, closing the circuits with the exception of the signaling circuit.

The contact springs f6, which tend to meet `ber when it has been removed; Fig. 2 is a secv n tion, taken at right angles to Fig. 1, with the vinclosing case removed, and the other parts ,restored to their workin at the upper end, are provided with outturned portions f6 which lie directly below an insulated engaging member f8 movable with the receiver hook f, so that when the weight of the receiver depresses the said hook it will separate the springs f6, thus allowing the other contacts to separate, as shown in F ig. 2, the signaling contacts CZ and cl3, however, then being in engagement. The instrument is thus in condition to receive signals, and upon the removal of the receiver from the hook the projection f8 will rise, thus permitting the springs f to come together, closing the telephone circuit-s and opening the signaling circuit, as best shown in F ig. 3.

In the construction shown, the receiver hook f is provided at the rear end with a downwardly extending arm f through which extends the pivot f4 between the extended portions f3 of the sheet metal pieces f2. The insulated engaging portion f8 is secured to the part fo and projects forward therefrom so as to move up and down with relation to the contact springs f as the receiver hook rocks on its pivot. A spring flo is arranged to act on the receiver hook f to move the outer end thereof upward when the weight of the receiver has been removed. This upper member is arranged to be connected with the lower member by a sliding movement, and to be securely supported thereon when in position.

The lower member B consist-s of a flat plate (Z5 properly secured to the base a, and extending upward therefrom, the spring contacts being held on a bracket Z6 secured to said plate, the springs being separated by insulating material and clamped to the side of the bracket Z6 by means of a clamping plate (Z7. The plate d5 extends upward above the ends of the contact springs and is provided with a notch ZS above which are formed two shoulders do, the notch serving to receive the switch hook f while the shoulders engage the plates f2 between the extensions f3 and the extensions f5. The space between these extensions f3 and f5 is substantially equal to the thickness of the plate d5, so that as the two parts slide together they lit and form an adequate mutual support. As an additional supporting means, however, the extensions f5 at the lower end are connected by means of a half round shell g which is secured to the sides of the extensions, the width of the plate (Z5 being substantially equal to the width of the shell g which, therefore, serves to hold the plate flat against the sides of the extensions.

The inclosing shell for the instrument consists of a metallic tubular portion 7L extending upward from an extended cap por tion it? which fits over the base a and covers the leading-in wires Z) and their connections, the tubular portion k surrounding the contact springs. The tubular portion t is shown as covered with an outer shell h3 which may be of hard rubber or gutta percha, the said shell being substantially the same in diameter as that of a downwardly projecting cap e2 at the rear of the receiver e. The metallic shell t projects upward above the outer portion h3 and is adapted to fit into the cap e2 so that when the instrument is assembled, the interior is fully protected and the outside is free from any apparent joints. The part g which is connected with the projections f5 is curved so as to conform to the interior of the tube 7L, and the contact springs f6 which are secured to the inner sides of the arms f5 are shown as connected by means of a bowshaped member z' which projects substantially into contact with the other side of the portion h, thus giving a support for the interior part at opposite sides. This construction, moreover, serves to keep the parts f5 in their original position and prevents them from spreading, or being sprung together.

sembled, the parts may be fastened by means of a screw 76 which extends through the side of the member 71, and the shell g and is screwed into the plate d5. This holds t-he parts all firmly together, and, at the same time, if it is necessary to inspect the connections, or to take the instrument apart for repairs, it is necessary only to remove the screw 7s, after which the upper portion A can be pulled out endwise, as shown in dotted lines, F ig. 1, and the inclosing portion lifted 0E. Then, if it is desired, the upper and lower parts, as shown in Fig. 2, can be put together without the inclosing portion, so that the instrument is in its original operative condition, but with all the connections and contacts exposed.

Claims:

l. In a telephone instrument a base provided with leading in wires and spring contacts; an upright support mounted on said base; a transmitter portion provided with a transmitter and a gravity hook for the receiver, said transmitter portion being removably secured on said upright; spring contacts for the transmitter conductors adapted to engage the spring contacts on the base; and an inclosing case independent of said base and support.

2. 1n a telephone instrument a base provided with leading' in wires and spring contacts; an upright support mounted on said base; a transmitter portion provided with a transmitter and a gravity hook for the receiver, said transmitter portion being removably secured on said upright; spring contacts for the transmitter conductors adapted to engage the spring contacts on the base; and an inclosing sleeve independentof said base and transmitter portion.

After the instrument is fully as- 3. In a telephone instrument a base provided With leading in wires and spring contacts; an upright support mounted on said base; a transmitter portion provided with a transmitter and a gravity hook for the receiver, said transmitter portion being removably secured on said upright; spring contacts for the transmitter conductors adapted to engage the spring contacts on the base an inclosing sleeve-independent of said base and transmitter portion; and a fastening device accessible from the outside,` for said inclosing sleeve, base and transmitter portion.

4L. A telephone instrument having a base or support and a transmitter supported thereby, but separable therefrom; spring contacts constitut-ing means for automatically completing the circuits through the instrument when said transmitter is supported upon said base` or support; an inclo'sing sleeve independent of the-base and the transmitter but adapted to be held Vin'position between said base and transmitter; and a single fastening device extending through said inclosing sleeve into engagement With the parts Within.

5. A telephone instrument having a base with a central vertical support; leading in Wires connected With said support; spring contacts connected With said leading in Wires and mounted on said vertical support, said cont-acts being so associated as normally to open the talking circuit and close the signaling circuit; a transmitter member having a sleeve connection With said vertical support; spring contacts mounted in said transmitter member, said spring contacts being electrically connected with the transmitter terminals and arranged t-o make electric-al contact With the spring contacts of the leading in Wires of the transmitter circuit and also to separate the signaling terminals by spring pressure; and a receiver hook adapted to act on the spring contacts mounted in the transmitter member and retain them out of engagement With the other contacts yWhen the receiver is on the hook.

In testimony whereof, We have signed our names to this specification in the presence of two subscribing Witnesses.

WV ALTER F. TAYLOR. VERNON DURBIN. Witnesses:

M. E. CovENEY, JAS. J. MALONEY.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents, Washington, D. C.

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