Improvements in Spring Weighing Balances.
Year: 1897

page_text: Improvements in Spring Weighing Balances.
I, EMIL UBRIG, of Westend, Berlin, Germany, Manufacturer, do hereby declare
the nature of this invention to be as follows:-
This invention relates to an improved construction of spring balances in which
the pan is at the top which I will describe with reference to Figs. 1, 2, 2 and 3,
of the accompanying drawings.
In spring balances having the pan at the top and constructed as heretofore, a
parallellogram motion was employed almost without exception for the purpose of
guiding the weighing scale carrier.
According to the present invention this parallelogram motion is completely
dispensed with; whereby the number of constructional parts of the scale is reduced
to a minimum.
C.
The
As shewn in Fig. 2 of the accompanying drawings, the balance consists sub-
stantially of the casing a b which is closed at top by means of a cover
The upper part of the casing may be formed as a tube, and is constructed at its
The latter consists of a
upper part to receive the spring carrier or support d.
short piece of tube having a flange, which latter rests on the upper edge of the
tube and is adapted to be held by means of a union nut or cover c.
spring carrier d may be fixed in the upper part of the casing in any desired
manner. Fig. 2 illustrates an arrangement in which this spring carrier is
inserted loosely in the tube b. The spring carrier is formed with screw thread
which is adjusted to correspond with the helical spring f as regards thickness
and pitch. The spring f is thus connected in a most simple manner with the
spring carrier by screwing it on to the same as shewn in Fig. 2 of the drawings.
In this scale the new and peculiar feature is constituted by the weighing scale
support e which extends through the coils of the helical spring and is proviued at
its lower part with a shoulder which bears against the helical spring f which is
closely coiled for this purpose, as shewn at Fig. 2, and which terminates at that
point. When a load is placed upon the load carrying scale or pan, the helical
spring will be acted upon in tension and will be drawn out or extended.
The connection of the lower end of the helical spring with the load carrying
For example, a disc, a
scale support may also be effected in any other manner.
pin, etc. might be fixed upon the weighing scale carrier e which is then of equal
thickness throughout; such parts being arranged to transmit the load to the
spring. Furthermore the lower end of the helical spring might be closed by
means of a perforated plate, so that the weighing scale carrier would act with a
shoulder or pin upon the plate and through the latter upon the spring. Also, a
part similar to the spring carrier & might be screwed into the lower end of the
helical spring as shewn in Fig. 2.
As already above mentioned, when the weighing scale is loaded, the weighing
scale carrier e moves down, and thus stretches the helical spring f. The lower,
end of the weighing scale carrier e which is guided in a bored hole in the casing

page_text: is connected with a lever mechanism of any suitable construction, which as shewn
for example in Figs. 1 and 3, serves to indicate the movement or extension of the
spring and by that means also to indicate the weight on a scale by means of a
pointer.
As shewn in Fig. 2, the spring-carrier a, the central hole in which serves to
guide the weighing scale carrier e, may be combined with a ball bearing for the
purpose of reducing to a minimum the friction of the weighing scale carrier in
its guides. It will be further readily understood that the ball bearing may also
be arranged on the lower guide of the weighing scale carrier in the casing
instead of in the
upper guide.
a 1.
As shewn in Figs. 1 and 2, the lever mechanism for actuating the pointer is
fastened by means of a screws to the lower end of the weighing scale carrier e,
so that after loosening this screw, the weighing scale carrier and the spring can be
lifted out of the casing.
It will also be readily understood from the drawings and also from the above
description, that the helical spring f may also have substituted for it a spiral or
volute spring of quick pitch or a buffer spring. But these two forms of springs
are acted upon in compression as distinguished from the helical spring. The
arrangement of these spiral and buffer springs is also effected in a tubular casing;
and the weighing scale carrier is also made to extend through or be guided by
the coils of the springs.
Dated this 10th dow of Taware 100%
I, EMIL UBRIG, of Westend, Berlin, Germany, Manufacturer, 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:--
This invention relates to an improved construction of spring balances in which
the pan is at the top which will describe with reference to Figures 1, 1ª, 2, 24,
and 3; of the drawings accompanying my provisional specification, and the accom-
panying drawing.
In spring balances having the pan at the top and constructed as heretofore, a
parallellogram motion was employed almost without exception for the purpose of
guiding the weighing scale carrier.
According to the present invention this parallellogram motion is completely
dispensed with; whereby the number of constructional parts of the scale is reduced
to a minimum.
As shewn in Figure 2 of the drawings accompanying my provisional specification
the balance consists substantially of the casing a b which is closed at top by means
of a cover c. The upper part 6 of the casing may be formed as a tube, and is con-
structed at its upper part to receive the spring carrier or support d. The latter con-
sists of a short piece of tube having a flange, which latter rests on the upper edge
of the tube b and is adapted to be held by means of a union nut or cover c. The
spring carrier d may be fixed in the upper part of the casing in any desired
manner. Figure 2 illustrates an arrangement in which this spring carrier is
inserted loosely in the tube b. The spring carrier is formed with a screw thread
which is adjusted to correspond with the helical spring f as regards thickness
and pitch. The spring f is thus connected in a most simple manner with the
spring carrier by screwing it on to the same as shewn in Figure 2 of the drawings.

page_text: loading the scale pan the resulting downward motion of the suitably guided scale
pan carrier e causes a direct pull to be exerted upon the spring, and at the same
time actuates an index through a suitable lever transmission, substantially as
described.
2. In the arrangement of spring balance referred to in the first claim, effecting
the connection of the scale pan carrier with the helical spring by coiling the
bottom convolutions of the spring more closely together and causing the same to
bear against a shoulder of the pan carrier, substantially as described.
3. In the arrangement of spring balance referred to in the first claim, effecting
the connection of the scale pan carrier with the helical spring, by screwing the
bottom convolutions of the spring on to a screw-thread on a disc against which the
scale pan carrier bears, substantially as described.
4. In the arrangement of spring balance referred to in the first claim, the
employment in place of the helical spring f of a spiral or buffer spring which is
subjected to compression by the pan carrier, substantially as described.
5. In the construction of spring balance referred to in claims 1, 2 and 3, guiding
the vertically moving scale pan carrier e in the casing by means of ball bearings,
substantially as described.
6. In the construction of spring balance referred to in claims 1 and 3, con-
structing the scale pan carrier of a rod or stem e on which is mounted a sleeve or
tube e¹ that bears against the perforated disc h engaged with the bottom convolu-
tions of the helical spring f, substantially as described.
Dated this 18th day of October 1897.
ABEL & IMRAY
Agents for the Applicant.

page_text: In this scale the new and peculiar feature is constituted by the weighing scale
support e which extends through the coils of the helical spring and is provided at
its lower part with a shoulder which bears against the helical spring f which is
closely coiled for this purpose, as shewn at Figure 2, and which terminates at that
point. When a load is placed upon the load, carrying scale or pan, the helical
spring will be acted upon in tension and will be drawn out or extended.
The connection of the lower end of the helical spring with the load carrying
scale support may also be effected in any other manner. For example, a disc, a
pin, etc.. might be fixed upon the weighing scale carrier e which is then of equal
thickness throughout; such parts being arranged to transmit the load to the
spring. Furthermore the lower end of the helical spring might be closed by
means of a perforated plate, so that the weighing scale carrier would act with a
shoulder or pin upon the plate and through the latter upon the spring. Also, a
part similar to the spring carrier d might be screwed into the lower end of the
helical spring as shewn in Figure 2".
As already above mentioned, when the weighing scale is loaded, the weighing
scale carrier e moves down, and thus stretches the helical spring f. The lower
end of the weighing scale carrier e which is guided in a bored hole in the casing
is connected with a lever mechanism of any suitable construction, which as shewn
for example in Figures 1 and 3, serves to indicate the movement or extension of the
spring and by that means also to indicate the weight on a scale by means of a
pointer.
As shewn in Figure 2, the spring carrier d, the central hole in which serves to
guide the weighing scale carrier e, may be combined with a ball bearing for the
purpose of reducing to a minimum the friction of the weighing scale carrier in
its guides. It will be further readily understood that the ball bearing may also
be arranged on the lower guide of the weighing scale carrier in the casing
instead of in the upper guide.
a b,
As shewn in Figures 1 and 2, the lever mechanism for actuating the pointer is
fastened by means of a screws to the lower end of the weighing scale carrier e,.
so that after loosening this screw, the weighing scale carrier and the spring can be
lifted out of the casing.
It will be readily understood from the drawings and also from the above
description, that the helical spring f may also have substituted for it a spiral or
volute spring of quick pitch or a buffer spring. But these two forms of springs
are acted upon in compression as distinguished from the helical spring. The
arrangement of these spiral and buffer springs is also effected in a tubular casing;
and the weighing scale carrier is also made to extend through or be guided by
the coils of the springs.
The accompanying drawing shews a modified arrangement in which the pressure
of the load on the scale pan i is transmitted to the spring f by means of a tube or
sleeve e¹ which is slid on to the scale stem e, with its upper end bearing against the
underside of the pan i, while its lower end bears against a washer e on the top
of the perforated disc which is formed with an external screw thread onto which
screw the bottom convolutions of the spring f, so that the pressure of the load is
transmitted to the spring through the disc h."
The other parts of the balance are similar to those already described with
reference to Figures 2 and 2.
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 spring weighing balances having a scale pan at top, the arrangement of
helical spring suspended by the engagement of its top convolutions with a fixed
hreaded spring carrier, in combination with a scale pan carrier e passing length-
vise through the helical spring, to which it is connected at bottom, so that on