US 296515 A
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INVENTOR ATTORNEYS Patented Apr; 8, 1884.
N. PETERS. PlmEo-Likhngriplmr. Washmglon. 0.0
UNITED STATES PATENT @rrrcn.
MARCUS M. BOWERS, OF BALTIMORE, MARYLAND.
SPECIFICATION forming part of Letters Patent No. 296,515, dated April 8, 1884.
Application filed September 13, 1883. (No model.)
To rzZZ whom it may concern.-
Be it known that'l, MARoUs ill. BOWERS, of Baltimore, in the county of Baltimore and State of Maryland, have invented certain new and useful Improvements in Bells, of which the following is a full, clear, and exact description.
This invention consists in an improved construction of farm, factory, church, and other bells, whereby greater vibration is secured for the upper portion of the bell, a more powerfnl tone is obtained, and the bell is less liable to break from shrinkage, tension, or strain of the metal in casting.
To these ends theinvention comprises a bellcylinder the flare of which is made up of a series of interrupted straight lines, a concave form for the head of the bell, and a hammerswell within the inside of the shell of the bell. These certain features may be applied independently of the others and in concert with other constructions of the bell.
Reference is to be had to the accompanying drawings, forming part of this specification, in which the figure represents a vertical section of a bell cylinder or shell embodying the invention.
To construct the bell cylinder or shell as represented in the accompanying drawing, I first make'said shell or pattern from which it is cast in or about the following proportions and manner-that is to say, I first make the main portion or body of the shell A in the form of a truncated cone, whose height from 3 to 4 is equal to half its base, and its top also equal to half its base. I then make the cap or head portion B of the bell of a'heiglit equal to one-fourth of the height of the said cone. 1 next divide the base-line -b of the cone into six equal parts, numbered, respectively, 1, 2, 3, 4, 5, and 6, and draw upwardly-converging lines from 1 and 5 to and through the circle which circumscribes the top of the cone. This gives the proper slo'pe or configuration of the sides of the head or cap B. I then lay off the boss 0 of the head and its eyehole d, and afterward draw the concave lines 6 in the top of the head between the body of the shell and the boss, and round off, as at f,
the junction of said concave surface with the outline of the body of the shell. I next lay off the desired thickness of the bell-shell and draw its inside lines.
shell of the bell is divided into five equal parts, as indicated by the dotted lines from 1 to 5.
The whole height of the The hammer-swell g is made wholly within the shell, and its inner profile is in the form of a segment the radius of which is equal to its chord, the length of which is limited by the first of the five divisional spaces in the height of the shell.
A bell or bell-shell constructed as described be used alone or in connection with convex or concave lines; but the general contour of the side of the shell will be represented by a series ofinterrupted straight lines diverging in a downward direction to give the necessary flare. By coneaving the top of the head of the shell, greater ease is secured for the vibrations of the shell, and there is less tension or st ain of the metal in casting it. The form of thehammer-swell gand its arrangement also within the shell, instead of on the outside thereof, have a greatly improved effect.
A shell constructed as described will have its power of tone very largely increased.
Having thus fully described my invention, I claim as new and desire to secure by Letters Patent- 1. A bell cylinder or shell having its sides constructed to form the flare by a series of in terrupted straight lines or surfaces arranged to diverge in a downward direction, substantially as specified.
2. A bell cylinder or shell having its head or cap made concave on its top, substantially as and for the purpose herein set forth.
3. As an improved article of manufacture, a bell cylinder or shell having its body portion of truncated form, its head or cap of diminishing tapering construction, and concave on its top, and its hammerswell arranged within it, essentially as shown and described.
Masons M. BOWERs.