Year: 1885

page_text: Дата Псев.
I, WILLIAM EDWIN HEYS of New Bridge Street Manchester in the County of
Lancaster Consulting Engineer do hereby declare the nature of this invention,
and in what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement :-
The present invention, including valuable and patentable features, has reference
to certain important improvements in the form, combination and disposition of the
several elements embodied in the construction and necessary to the operation of
that class of devices named in the title of this invention.
This invention further relates, first to the balance proper and secondly to the
construction of the casing and support for said balance, the two together forming a
complete instrument adapted to be used in analytical chemistry and in other
departments of science and art. The object of the former part is to facilitate the
manner of adjusting the final position of the rider upon the scale beam, while the
object of the second part is to provide a construction which shall effectually
prevent the ill effects of moisture upon the wooden parts.
The invention consists generally of certain elements organized essentially as
described in conformity to the accompanying drawings; adapted to operate as
hereinafter explained, and for the purpose of accomplishing the above named
object; including all modifications as to their form, combination and disposition
covered by the claims hereinafter annexed; and applicable to any purpose
mentioned or not mentioned but intended to be devoted to the uses herein
alluded to.
In order to illustrate the practical manner of carrying out the invention, and to
enable others skilled in the art to which the invention appertains to make and use
the same, a sheet of Drawings is hereunto annexed and hereinafter described, in
which similar letters represent corresponding elements and in which each part
referred to is designated by a single character. Those parts not mentioned are not
claimed in this the pressent application. The materials of construction employed,
33

page_text: the exact forms of design, and the proportional dimensions are not alluded to in
every instance as they are best determined upon by engineers in the art.
Fig. 1 shows a general view of those parts of an analytical balance of the type
usually made by Becker Bros. of New York City, involving this invention; Fig. 2
is a detail side view of a portion of Fig. 1.
A is a scale beam graduated from one end to the other, balanced at its center B
in the usual manner and provided with a rider C. D is a rod capable of
longitudinal movement through the bearing E in the casing F, and bearing G
connected to the pillar support H rigidly by the projecting piece I which is pre-
ferably of such a shape as to hold the bearing clear of the middle part of the scale
so as to have plenty of room for the movements of the weight or rider C.
This rod carries two lifters J and J. By the longitudinal and rotary movements
of the rod D the lifter J, consisting of a projecting wire secured to the rod D, will
lift and carry the rider from the zero mark on the scale to any division towards the
right. The rod J, consisting of a wire bent twice, as shown, and secured to the
rod D, serves a similar purpose for lifting and carrying the rider from the zero
mark of the scale to any division on the left; the said wire so bent as not to
interfere with the rod supporter and bearing G. The first part of this invention
may be varied; but what is claimed may be learned at the end of this specification.
The second part of this invention consists of the glass plate K between the
base Land the bottom M of the casing F; the said three parts being held rigidly
together by the bolts N passing through all three. Heretofore, the bearings E
and G, although accurately in the same horizontal line when first constructed
would after a time become out of line. By the construction shown this difficulty
is removed, and at the same time the construction is much cheaper than in those
cases where a glass plate is included wholly within the casing and serves only as a
support for the pillar H. A metal plate may be substituted for the glass with the
same results; but the weight and want of a highly polished and untarnishable
surface would make it objectionable.
Having now particularly described and ascertained the nature of my said
Invention, and in what manner the same is to be performed, I declare that what
I claim is
(1.) In an analytical balance, the combination of a casing; a scale beam
graduated from one end to the other; a rod located near said beam; a weight or
rider upon said scale beam; two bearings for said rod, one of which is upon the
supporting pillar of the beam, and the other of which is upon said casing, the former
bearing being towards one end of the scale beam; and two lifters for said weight,
one of which is attached to said rod upon one side of the bearing which is
secured to said pillar, and the other of which is upon the other side of the said
bearing, substantially as and for the purpose set forth.
(2.) In an analytical balance, the combination of a base, a casing, and a glass
plate secured both to the said base and said casing, substantially as described.
(3.) In an analytical balance, a base, a glass plate upon said base, a casing
upon said glass plate, and bolts passing through the said base, said glass plate and
the bottom of said casing, substantially in the manner hereinbefore described.
Dated this seventeenth day of December A.D. 1885.