US1546780A - Adapter for telephone calling devices - Google Patents

Description

July 21, 1925.

J. ERICKSON ADAPTER FOR TELEPHONE CALLING DEVICES Filed Jan. 22. 19

Patented July 21, 1925.

UNETED STATES PATENT OFFICE.

JOHN ERICKSON, OF CHICAGO, ILLINOIS, ASSIGNOR TO AUTOMATIC ELECTRIC COM- PANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

ADAPTER FOR TELEPHONE CALLING DEVICES.

Application filed January 22, 1923. Serial No. 614,142.

The present invention relates to adapters for calling devices and transmitters, and more particularly to an adapter which pro vides means for assembling together a call ing device and a telephone transmitter into a self-contained unit which may be attached readily to a subscribers telephone instru ment.

The object of the present invention is the production of an adapter whereby a calling device and a transmitter may be readily attached to a wall type subscribers telephone instrument, without the necessity of defacing the instrument to the extent of making new holes through which wires pass to the transmitter or calling device.

This adapter is particularly intended for application to telephone instruments connecting with central offices which are being re-equipped and transformed from manual operation to automatic operation.

When a central telephone office which has been operated manually previously is recquipped for automatic operatlon, it is necessary to equip each subscribers telephone instrument connecting with that office. with a calling device such, for example, as that described and illustrated on pages 38-43, inclusive, of Automatic Telephony, second edition. This is a book written by Smith and Campbell and published by'Mc- (-l'raw-ltlill Book Company, New York city.

This calling device, if mounted directly on the face of a wall type instrument, necessitates making a hole therein, at or near the point where the calling device is mounted in order to pass the wires connecting with the calling device to the interior of the in strument, or, as an alternative, to run the wires from the calling device along the face of the instrument to the opening at the rear of the transmitter, through which the wires connecting with the transmitter are passed to the interior of the instrument. This latter method results in an unsightly appearance which is incompatible with good telephone practice.

It is, of course, desirable in attaching calling devices, that the necessity of making additional holes in the subscribers telephone instruments for the purpose of passing wires through the faces thereof be obviated and furthermore, on some types of subscribers wall type instruments, it is i1npracticable to bring the connecting wires for the calling device through the face of the instrument at the particular point where it s desired to attach the dial, on account of mterference by apparatus inside the set. This is especially true of some types of coin collecting telephones, wherein any additional Wires which might be passed through the face of the instrument at points other than the one already provided for the transmitter wires would be likely to interfere with the coin chute within-the telephone.

This invention provides an adapter combimng in one piece, means whereby a calling device can be mounted on a subscribers telephone instrument of the Wall type without the necessity of making additional holes in said instrument for the purpose of pro- V'iding outlets for connecting wires, means for mounting a transmitter on said subscribers instrument, and an inclosed conduit for the conductors leading from the telephone set to the transmitter and the calling device.

Referring tothe drawings, Figure 1 is a side elevation and Fig. 2 a front elevation showing the adapter with a calling device and transmitter attached thereto and mounted on the face of a telephone wall type instrument. 1 is the adapter, 2 is the calling device, 3 the transmitter, zind 4 the tele phone box." Fig. 3 is a rear view of the adapter in which 5 is a channel forming a conduit for the conductors which run for a short distance thereunder along the face of the instrument to the opening therein situated between the transmitter and the calling device, the transmitter being raised somewhat from its original position in order to give sufficient room for the calling device to be mounted underneath and also to give the box a more symmetrical appearance. 7-10, inclusive. are threaded screw holes for attaching the adapter to the face of the telephone'box by screws passed through said face from the interior of the box. 11 and 12 are screw holes for attaching the transmitter to the adapter, while 13 is a threaded screw hole through which the screw 14 (Figs. 1

and 2) is passed to lock the calling device in place.

Referring now particularly to Fig. 1, 15

is the transmitter mounting plate and is held in place by screws which pass through the holes 11 and 12 in the adapter. 16 is a nut threaded on the screw which passes through the screw hole 12.

It will be noted, particularly in Fig. 1, that the lower end of the adapter is so formed that the calling device face is at an angle from the vertical. This gives the user a moredirect view of the calling device when he looks down at it, it being assumed, of course, that the instrument is so mounted that the transmitter is in line with the mouth of the average user, and consequently, that the calling device is lower than the users eyes.

What is claimed is:

1. In combination, a subscribers telephone set including a transmitter, an adapter, a calling device attached to one end portion 7 of said adapter, said transmitter mounted on the other end portion thereof,

and means for detachably mounting said adapter on said set. I

2. In combination, a subscribers telephone set including a transmitter, an ada tor comprising a metal plate, a calling device attached to one end portion thereof, a channel integral with said adapter forming a conduit for conductors for said calling device, and means for 'detachably mounting said adapter on said set.

3. In combination, a subscriber s telephone sct including a transmitter, an adapt er comprising a formed metal plate, a calling device attached to one end portion of said adapter, said transmitter mounted on on said set.

In witness whereof, I hereunto subscribe my name this 16th day of January, A.

JOHN ERICKSUN.

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