US897119A - Telephone-signal. - Google Patents

Description

No. 897,119. v PATENTED AUG. 25, 1908.

c. MAHLER. TELEPHONE SIGNAL.

APPLICATION FILED APR. 27.1907.

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CHARLES MAHLER, OF SEW YORK, N. Y.

TELEPHONE-SIGNAL.

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Specification of Letters Patent. Application mm ei ru 27, 1907. sq-m No. 370,610.

Patented Au ust, 1908.

To all whom it may concerns having a rearwardly extending arm and Be it known that I, CHARLES MAnLER, a upwardly extending s ring arm 7, terminatcitizen of the United States, residing at the I borough of Brooklyn, New York city, in the county of Kings and State of New York, have invented certain new and useful Ini rovements in T elephone signals, of which t 1e following is a s cification.

My inventul'n relates to signals for telephone switchboards. V

The object of my invention is to equip atelephone switchboard with a series of audible s gnals, each operated separately and each connected with its respective branch line or telephone. Each audible signal has its own distinct and peculiar tone, differing from the tones of the other signals in the series.

B the use of my invention the operator at tile switchboard is enabled to know what branch line or telephone requires the imme- An audible click or signal has usually been.

nals before him to ascertain the source of the Y call. My invention, b combining with the audible signal means or indicatin thereb the source of the call dispenses with this 81 ditional or secondary observation of the operator.

By he use ofmy invention, blind opera tors or those having defective eyesight may be employed at tele hone switchboards, thus providing such u ortunate persons with a new field for earning avlivelihood.

In the drawin Figure 1 is a front-i icw of a portion of a switchboard showing themanher in which my device is secured thereto. Fig, 2 is a side view of the operative parts of one of the audible signals. Fig. 3 is a view vsimilar to Fig. 2, showing a modification.

In the drawin 1 is the front of theswitchboard, across w iich extends the cross-bar 2. Extending from the cross-bur 2 and secured thereon is a series of uprights 3, each carrying. an audible signal or hell 4. Mounted upon the cross bar 2 behind each bell 4 is an L shaped lever 5, pivoted upon the pin 6,-

ing in a ball 8. At t ie rear of each bell is mounted a magnet 9, which when energized so attracts an armature 10, pivo ed at 11 and having the forwardly extending arm 12 adapted to be thrown upward against he L- shaped lever 5 and to sound the bell'4, when the armature 10-is drawn rearwardly by the 5':- nm et 9. In the modification illustrated", by ig. 3, the L shaped lever 5 is dis ensedwith. Projecting reanvardly from t e iv-- oted armature 10 and. connected thereto is the ring arm 13 terminating in-the ball1'4 7o whisl i is adaptedto strike against the bell 4 when-the armature 10 is drawn towards itse operation ofthe deviceis as follows? Each of the series ofelectro-magnetsi 9 isj7'5 adapted tobe energized by the removal ofthe receiver of abranch telephone fi'om'its normal support in the usual way. When an" electro magnet 9 is-energized it will attract" its armature 1D and throw upward thefor- 3'0 wardly projecting arm 12 which will strikeagainst the I. shapedleverh throwing the ball 8 against the bell'4. Each branch tele-" phone is connected'with'its individual elec tro magnet 9 adapted toring its correspond- 35 ing bel 5 of the series. As indicated in Fig;

1', the bells date of difierent'sizes and'tones' so that the sounding of one hell will indicate to the operator who has learned'the series of tones what branch telephone desires com-- munication. The tones of the bells may arran ed in musical scale or otherwise so dif ferentlated' that the operator may readily; recognize the distinctions in'sound." Eac' spring arm 7 shouldbe so adjusted'that it will spring out of contact with its hell 4 in'1-' niediately after its blow has been delivered.-

In the modification illustrated by Fig. the upward movement of the spring arm 13 carries the ball 14 against the hell 4 and the adjustment of the spring 13 throws the ball l4 away from the bell 4 after the blow has been struck. y

i device may, of course, be employed in" connection with the usual visiblesi als in which case the sounding of the audib e signal; and the appearance of the visible signal will be simultaneous.

My device mav be conveniently installed on switchboardslof the usual'type having'llo" visible signals byTositioning the cross bar- 12 and parts carried thereby so that the a'ddiblo signals may be operated in the 115-1511 F 5.1m by 115 imlh idual oim-t'm-mngnqt to ring visibli; signals ahead) on ihv swi'tuhbumvl.

\Yuni l pflulm as new and v Lviivrs Patent 1s:

(loam-magnets individuzd in. mu'h branch l-PlCPhnUO, i1 porrcspunding svrivs of 'huHs of (liflerex'n individual tones, and a mrrvqkunding suricbi of lovers each zulupiul to be autullvsirc to secure I 1'.) mu uf Th0 luHs in said sm'ivh. I

Signed at New York vii in the mum) of E New York and Sum of New Yurk this 26th (1:1 of April A\.]). 13)!)7.

CHARLES MAHLER. filnvssvs:

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