US1148787A - Calling device. - Google Patents

Description

-.l. L. McQUARRlE.

m m. m V m a D1 Wifnesses:

027 $0 .hmes M Quark/1? JAMES L. MGQUARRIE, 0F MONTCLAIR, NEW JERSEY, ASSIGNOR T0 WESTERN ELECTRIC COMPANY, OZE NEW YORK, N. Y., A CORPORATION OF ILLINOIS.

CALLING- DEVICE.

airs-ner.

Specification of Letters Patent.

Patented An 3, 19315.

Application fi1ed March 10, 1915. Serial No. 13,454.

-Montclair, in the county of Essex and State of New J ersey, have invented certain new and useful Improvements in Calling Devices, of which the following is a full, clear,

concise, and exact description.

This invention relates to improvements in calling devices and more particularly to impulse senders for automatic and semi-automatic telephone systems. I

In impulse senders of the above type, the impulses are usually sent out during the return movement of'the dial. The user sends out impulses corresponding to digit numbers by inserting his finger in the proper holds and pulling the dial around until a stationary stop is reached. It has been noticed that in cases when the two digit numbers are the same, the user is liable to leave his finger in the selected finger hold and force the dial back to its normal position, thereby artificially increasing the speed of rotation, of the impulse wheel. The result may be that the impulses are not sent out in proper intervals for the control of the automatic switches.

Many inventors have sought to provide means for preventing improper actuation of the dial during the sending out of impulses, by providing various kinds of locking means. The great drawback of such senders is that their cost is high and that they easily get out of order.

The object of this invention is to provide a sender in which the possibility of the subscribers interference withthe sending out of impulses is reduced to a minimum.

According to the main feature of this invention means are provided for allowing the users finger to slide out of engagement with theselected finger hold when the dial has been inoved to any of its operating positions.

The drawing represents a perspective view of a calling device'of thefinger-hold dial type embodying this invention.

As calling devices of this class are wellknown in the art, and since, in connection with the present invention, the construction of the interior mechanism of the device is immaterial, in the following detail description only those parts of the apparatus will be described to which the invention is directed.

A manually rotatable setting member or dial 2 is provided with a plurality of fingerholds 3 around its periphery. The spaces between finger-holds 3 are open outwardly. In order to prevent the finger from sliding out of engagement with a selected fingerhold 3, dial 2 is surrounded by a guiding member or frame 4:. The different digit characters are provided on a plate 5 mounted below dial 2. Plate 5 may be either stationary or rotatable with dial 2. Instead of providing the digit characters on a separate plate, they may be printed on the dial 2 ad'-- jacent to the finger holds.

The user desiring to send out impulses representing any digit, inserts his finger in the hold corresponding to that digit and rotates dial 2 until a stationary stop 6 provided on frame 4c is reached. During the forward rotation of dial 2, frame 4: prevents the users finger from sliding out of the selected hold 3 in an outward direction. Adjacent to stop 6, however, a portion of frame 4 is cut away as shown, at 7, and when stop 6 is reached the users finger will slide out of the selected hold through this opening7. In order to facilitate the sliding out of the operators finger the stop 6 is inclined toward the opening 7 from the direction of approach of the finger holds, as shown in the drawing. The dial is then free to return to normal without interference by the user and the impulse sending mechanism will send out the desired impulses in the proper manner.

While the setting member of the calling device is referred to as a dial, it will be obvious to those skilled in the art that this invention is not limited to the specified form of manually operable setting member shown, but is equally well applicable to setting members of Widely varying characters known in the art.

What is claimed is:

1. In a calling device, a manually operable membenhaving finger holds, a stop toward which said finger holds move in the setting 0P61at1011,..&11l guiding means cooperating with said finger holds and having and in the path of the finger holds, said stop surrounding said finger holds and having being inclined toward the opening from the an opening adjacent to said stop. 10

direction of approach of the finger-holds. In witness whereof, I hereunto subscribe 3. In a calling device, a manually opermy name this 9th day of March A. D., 1915.

5 able member rotatable in a forward and 'JAMES L. MGQUARRIE.

backward direction having finger holds, a Witnesses:

stop toward which said finger holds move in ANNA BOYLAN,

the setting operation, and guiding means E. EDLER.

Qopis of this patent may be obtained for five cents each, by addressing the Commissioner of Iatents,

Washington, D. O,

Images