Year: 1888

page_text: I, JOHANNES JEZIORSKY, of No. 89 Zimmer Strasse, in the City of Berlin, in the
Empire of Germany, 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 ordinary adjustable timbering is very defective in consequence of its primitive
construction for the reason that the application of the same in high or thick layers,
considerable inclines and the like, is very doubtful and by no means reliable.
The same cannot under these circumstances and in consequence of its construction
support a heavy load, as the screw spindle is readily bent and the bored timbering
split.
The boring-out of the timber is a tedious piece of work and cannot in case of
breakage be readily effected on the spot. All these disadvantages are overcome by
my improved struts.
My improved struts are made of iron and consist of two, three or more segmentally
bent or formed rails according to the size of the timbers and provided on their
outer surface with screw threads and at their upper and lower ends with flanges.
The application of two such segmental rails is represented in Figures 1, 2, 3, 4,
14 and 15 in section, elevation and top view, the application of three such rails is
represented in Figures 1, 2, and the application of four segmental rails in
Figures 3, 4 in top view.
The lower flanges of the segmental rails a stand on the base B and are bolted to
the same whilst the upper flange is bolted to the head piece C, Figures 1 to 4 and
10, 11, 16, 17 and 1° to 4°.
The two semicircular jaws or semi-sleeves E encircle the segmental rails X, and are
bolted together by suitable bolts and vertical flanges, whilst the upper and lower
horizontal flanges are connected by the bolts f., Figures 1 to 4 and 1 to 4,
Figure 9 being a horizontal section of the same.

page_text: Within the segmental rails and resting on the upper flange of the sleeve E is a
carrier D for receiving the timbering or iron supporting tubes. The form of the
carrier D corresponds with the arrangement of the segmental rails, Figs. 12,
20, and 22.
In the hollow upper part of the carrier D, I employ radially arranged pressure
screws with appropriately bent jaws g which engage with the timber or tube inserted
in the carrier and clamp the same firmly in the centre of the carrier D.
The bottom of the carrier D is provided with borings for the passage of the bolts h,
Figs. 12, 20 and 22, which run through the plate G so as to connect the carrier
bottom arranged above the jaws E with the plate G located beneath the said jaws.
When the screw jaws E, which engage into the threads or toothing of the segmental
rails are turned to the right, the upper flange of the said jaws will press against
the carrier D so that the same and with it the timber or tubing is caused to rise
or move upwards. If, however, the jaws E are turned to the left the lower flange
of the same will press on the plate G connected to the carrier D and draw the same
and also the timber or tubing in the same downwards.
If iron supporting tubes are used instead of timber the same are screwed to the
bottom of the carriers D.
The form of the plate G corresponds exactly with that of the bottom plate of the
carrier D, Figs. 13, 21 and 23. The upper ring C is provided with radially arranged
clamping screws i so as to securely hold the timber or supporting tube, Figs. 1, 7, 8
and 19. When iron supporting tubes I are employed the same can be perforated as
represented in Fig. 5, in order to reduce the weight of the same and the radially
arranged screws in the upper or head ring C provided with suitable clamping
jaws, Fig. 8.
The segmental rails x head or upper ring C and the base or lower part B can, if
desired, be cast in one piece Fig. 6. Instead of the segmental rails a profile iron Y
such as T, I, U, or other forms can be used, Figs. 5, 6 and 18. In layers of
considerable height, sinking shafts and for building tunnels where it is necessary or
desirable to employ fittings of more than 6 feet in length a second pair of screw
jaws F with carrier D and plate G' are employed to receive the braces or stays Z,
the arrangement of the carrier D' and the plate G² being precisely the same as in the
foregoing arrangement, Figs. 1, 2, 3, and 4.
The weight of the iron supporting tube is trifling in comparison with its stability
and bearing capacity.
My improved fittings can be employed as movable timbering, stays or braces etc.
or the same can be used as stationary timbering in excavating thus causing an
enormous saving in timberage.
Cuttings through ruptures in solid or boggy rock and especially, when accidents
have occurred is considerably facilitated and rendered safe by employing my improved
fittings.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :-
1. Iron struts for wooden mining timbers or iron supporting tubes characterised
by the head piece C, provided with clamping screws i, the base or foot B, the
carrier I) for the timber or supporting tube the segmental or other rails provided
on their outer surfaces with screw threads and at their ends with suitable flanges
and surrounding the carrier D and plate G connected together by the bolts h, the
screw jaws E arranged around the said segmental rails so that when the former
are turned to the right they will press against the carrier D and when turned to the
left against the plate G whereby the foot B is pressed onto the sole of the conduit
or gangway and the timber or iron tube clamped in the carrier D by the pressure
screws and clamping jaws g is pressed against the roof or withdrawn from the same
substantially as and for the purpose set forth.

page_text: 2. In the struts described in the foregoing claim, the use of T or other suitable
formed rails Y in place of the segmental rails x, said rails being provided with.
appropriate inclined toothing or screw threads, substantially as and for the purpose
set forth.
3. In the struts described in the foregoing claims 1 and 2, the arrangement of the
screw jaws F in combination with the carrier D' and plate G³ for transfering the
pressure exercised onto the segmental rails onto the profile iron Y and the braces
or stays Z, substantially as and for the purpose set forth.
Dated this 90th day £ Dasamban 1888
FREDERIC PRINCE,
1, Quality Court, Chancery Lane, W.C.,
Agent for Applicant.