Improvements in Shields for Water Gauges for Steam Generators.
Year: 1896

page_text: Date of Application, 7th Dec., 1896-Accepted, 27th Mar., 1897
COMPLETE SPECIFICATION.
Improvements in Shields for Water Gauges for Steam Generators.
I, PETER JENSEN of 77 Chancery Lane London Chartered Patent Agent do
hereby declare the nature of this invention a communication to me from abroad
by Friedrich Rockstroh of No. 20 Augustastrasse Görlitz. Germany Manufacturer
and in what manner the saine is to be performed, to be particularly described and
ascertained in and by the following statement :-
The subject of this invention is a shield or protecting device for water gauge
glasses in which a gutter formed plate has painted on it colored parts or stripes or the
like so that the difference in the light refraction contingent on the gauge glass part
filled with water and the part not filled with water will distinctly indicate the liquid
level at all times. With this is combined a flat glass plate in front whereby the
advantage is obtained that the height of the water level can also be observed with
certainty from the back.
Fig. 1 of the accompanying drawings is a front view of such a protecting device,
Fig. 2 a horizontal section on line a-x and Fig. 3 a vertical longitudinal section
on line y-y.
Fig. 4 is a side view of one of the sliding clips.
Fig. 5 is a part front view of a modified form of protecting device and
Fig. 6 a horizontal section on line 2-2.
The flat glass plate a bears along the edges on the flanges of the gutter shaped
plate b which is fixed to the gauge glass fittings: the plate b is on the back
provided with an upper and a lower staple c wherein as an example two screws d are
fixed, the shanks of which pass through the slots e¹ of a bar e provided with spring
clips. These clasp the nuts g through which the gauge glass h passes. According-
to the distance the nuts y are apart, so the bars e are to be fixed on the staples c.
The sliding clips i are channel shaped pieces of sheet metal. In Figs. 1-4 they
are provided with the following means for preventing a displacement of the glass
plate a at the upper end of the flange bi there are lappets 62 projecting to the
front and which take into a downward slot in the sliding clip; there is also
a peg k which takes into a downward slot in the sliding clip i. The latter is thus
at its upper end prevented from accidental lateral displacement. At the bottom
the flanges b are also provided with front lappets 63 which take into notches in the
clips i. Supposing the slots 2 at the upper end of same are carried far enough
down for permitting the clips i to be pushed so far up that the lappet 3 at the lower
end may become disengaged from the notches then the clip i has for this purpose
only to be pushed up and then moved sideways.
In the arrangement Figs. 5 and 6 there are only pegs k at the back of the flange b',
and a corresponding slot as in the first example. This peg k and a bottom slot i at
the rear of the clip i serve to fix the clip. In some cases the projections b² bak and
the slots are omitted so that the clip i is quite plain.
The plate b is on the side towards the front in the part behind the gauge glass
painted with black or red slanting parallel stripes as shewn in Fig. 1. The water
filled part of the gauge glass will make the stripes appear helical of a much
smaller slant than the stripes lying behind the steam filled part of the gauge glass.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed as communicated to me
by my foreign correspondent I declare that what I claim is.
1. Protecting device for gauge glasses consisting of a gutter shaped plate such as b

page_text: provided with slanting parallel coloured stripes / on the front and having flanges b¹ in
combination with a flat glass plate a resting upon said flanges, whereby the stripes
refracted upon the gauge glass in front of the distinctly indicate the water level
substantially as described with reference to Figs. 1-3.
2. The sliding clip i for fixing the glass plate a to the flanges 61 substantially as
described with reference to Figs. 1-6.
3. In combination with the plate the vertically adjustable bars e having spring
clips which clasp the nuts g on the gauge glass stuffing box fittings substantially as
described and shown.
Dated this Seventh day of December 1896
JENSEN & SON,
77 Chancery Lane, London, W.C., Patent Agents.