US1387188A - Bell - Google Patents

Description

0. A. SHANN.

BELL.

APPLICATION FILED NOV. 26 I9I7.

Patnted Aug. 9,- 1921.

P J-lgL-H VVresales.

OSAR A. SEAN N OF BROOKLYN, NEW YORK, ASSIG-NOR TO WESTERN ELECTRIC CM- IPANY, INCORPORATED, OF NEW YORK, N. Y., A CORPORATION OIF NEW YORK. j

BELL. f

' description. Y

This invention relates to improvements in bells, and more particularly to bells which yare employed for signaling purposes. s

ln cases where there are several closely adjacent signal bells, it is frequently .desirable to provide bells which producel distinctive sounds so that the source of each signal can be quickly and accurately determined.

Especially in telephone systems where several lines terminate at closely adjacent stations, it is desirable to provide bells having distinctive tones or sounds for such stations so that the subscribers may readily distinguish the calling signals of their respective stations.

The object of the present invention is to provide a simple inexpensive bell which will produce a distinctive, peculiar and pleasing sound.

To obtain this object in accordance with one feature of the invention, a T-shaped slot extending from the edge of the bell toward the crown thereof is provided in the wall of the bell.

These and other features not specically mentioned above, will more clearly appear from the following specification and the annexed drawing, in which Figure l shows a front elevation of an ordinary telephone ringer on which are mounted two bells em'- bodying the invention, while Fig. 2 shows a plan view and Fig. 3, a side elevation of a bell embodying the invention.

ln Fig. l'of the accompanying drawing l-l represent two signalbells removably mounted upon posts 7-7 of a telephone ringer of the usual type, comprising a frame specification of'retters Patent.

8 which supports the posts 7 7 andthe elecl l y Patented Auge, aaai.

v.Application filed November 26, 1917. Serial No.V 204,026.

r'rs rATsNTorFic/E.

tromagnets- 9 9, which magnets actuate lthe y v armature 10 to cause the vibration of the clapper or hammer l1. ln Figs. 2 and', l

Y represents a bell provided with a circum-ferf l ential slot 2 extending substantially parallel to the base or edge of thebell, and witha ras dial slot 3 extending'from the base to slot 2,

thus providing free vibratory reed portions 4L and 5 the free ends of rwhich are placed in opposing relation to each other.

It will be readily noted that if the bell is struck'by clapper 11 or other medium pref` erably at a point near the base andaway from the slots 2 and 8, the ends 4 and 5 will, vibratesomewhat independently of the remainder of the bell wall and as a result, the bell will emit a distinctive sound. By varyl ing the location of the slot 2 relative to the base and thereby changing the length of the slot 3, the pitch of the sound produced may be varied so as to produce numerous peculiar allel to the edge of the gong and a second slot extending from such first mentioned slot to" the edge of the gong.

3. A gong having a T-shaped slot, the base of suchv slot terminating at the base of the gong. v

4c. A gong comprising a body portion and a plurality of opposing extensions parallel to the base of the body portion. i f

5. A gong comprising a body portion and a plurality of opposing extensions thereof of substantially uniform cross-section.

ln witness whereof, I hereunto subscribe my name this 21st day of November, A. D.v

OSCAR A. sHANN.

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