Year: 1898

page_text: Date of Application (in the United Kingdom), sra may, rodo
Complete Specification Left, 3rd May, 1898-Accepted, 4th June, 1898
I, MAURICE D. PENDERGAST, Mechanic, of Hutchinson, Minnesota, United States
of America, 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 :--
My invention relates to wire fences, and has for its object to improve the construc-
tion, with a view to increased efficiency and economy.
To these ends, my invention consists of the novel structure hereinafter described
and defined in the claims.
The invention is illustrated in the accompanying drawings, wherein, like notations
referring to like parts, throughout the several views.
Figure 1 is a front elevation of my improved fence, in its simplest form ;
Figure 2 is a similar view of a part of one panel, on a larger scale than
Figure 1;
Figure 3 is a diagram view for better illustrating the relative disposition
of the wires, showing the same as they would appear before the fence is entirely
completed;
Figure 4 is a view similar to Figure 1, with some parts broken away, showing a
modified construction, involving additional elements besides those shown in
Figures 1, 2 and 3;
Figure 5 is
Figure 4; and,
an
enlarged detail
of
of
some
in
the parts shown
Figure 6 is a diagram view, showing the disposition of the wires for the form of
fence illustrated in Figures 4 and 5, before the fence is completed.
Directing attention first to the simplest formn of construction, as illustrated in
Figures 1, 2 and 3, it may be noted that I employ in the construction of this fence,
a pair of main wires 1 and 2, a series of filling wires 3, suitable stationary posts 4,
located at proper intervals apart, and staples 5. The main wires 1 and 2 are
reversely looped, in opposite directions, to form, in succession, the top and bottom
strands of the fence, and afford pairs of vertical strands embracing the filling wires 3,
with the pairs of vertical strands twisted together between the filling wires 3
embraced thereby, to afford the vertical stays a of the fence. Otherwise stated, the
main wires 1 and 2 are bent to form a series of loops, with horizontal and vertical
sections, so disposed that the horizontal sections of the two wires form the top and
bottom strands of the fence, and the vertical sections of the loops formed out of the

page_text: the crank pin or elbow is shewn parallel & the claw at right angles, this has been
purposely done to shew both ways.
Fig. 9 is a longitudinal section of the thrust block & shaft, here, also is a spherical
bearing or liner (P, P) surrounding the centre of motion (O) which spherical bearing
can of course be made part of the shaft itself & then no liner is required and in the
thrust shaft this is less disadvantageous than in the case of other bearings. The
shaft thrust rings instead of having flat surfaces at right angles to the shaft as
in ordinary cases, are made with their thrust surfaces in the form of a part of a
sphere or spheres having a common centre at (0) it will thus be seen by the different
lengths of R, R, R, R that the inside & outside of each ring have different radii. The
grooves of the thrust block or bearing are of course made to correspondingly fit the
thrust surfaces of the shaft rings but in order to allow play in any direction (say
through the angle H) I make the thrust block grooves deep enough to allow therefor
leaving spaces (V, V).
As these rings are in reality undercut, if half of them are made to the right & half
to the left of the centre (0) as shewn by dotted lines, it is clear that such a thrust
block must be made in two pieces above & two below, and would require a ring or
stop also in two pieces to key them in. To obviate this objection I prefer (notwith-
standing the apparently lopsided arrangement) to make all the thrust rings & grooves
on one side of the centre of motion (0) as shewn by the full lines, in which
event the thrust block need only be in two pieces as is usually the case in
ordinary practise.
Fig 10 shews a section of the stern tube, shaft bearing & spherical liner (P)
which has a corresponding bearing in the tube (L) is the lignum vitæ bearing
fitted into the spherical liner (P) the screw shaft passes through the lignum vitæ bearing
in the ordinary way (G) is the usual packing for the water tight gland & it will
be seen that here also the shaft is more or less free to move & adapt itself
within certain limits upon its centre of bearing (O). (, ) are two correspond-
ing rings which fit into & are bolted or fixed in any convenient manner in the
stern tube after (P & L) are in place, these two rings (4, 4) when put together
forming a concave cup for the spherical liner P to either rest or work in (D) is
the stern tube, the attachments to the ship framing depending upon circum-
stances.
I wish it to be most clearly understood that I make no claim whatever for the use of
what are commonly called ball or roller bearings, which necessarily revolve & which
I do not use at all, but as will be seen I do claim a spherical liner as shewn &
described but which is not intended to revolve with the shaft but only to give
limited play to adjust itself automatically in case either or both plumber blocks got
out of line.
Having now particularly described & ascertained the nature of my said inven-
tion & in what manner the same is to be performed I declare that what
I claim is
(1) In connected lengths of shafting a coupler or couplers consisting of a crank pin'
or elbow on one end of a length of shafting said crank pin or elbow working in a claw,
jaw, or slot on the length of the shaft adjoining said claw jaw or slot being long enough
& wide enough to allow the crank pin or elbow to traverse along as well as at right
angles to, the said claw, substantially as described & for the purposes set forth.
(2) A combination of crank pin or elbow fitted with a sliding ball or spherical bearing
which can slide along said crank pin or elbow attached to one end of a length of
shafting, and a corresponding receiving claw jaw or slot attached to the adjoining
length of shafting as a means for coupling two parts of a rotating shaft substantially
as described & for the purposes set forth.
(3) In a shaft bearing, the insertion of a liner or liners of a spherical or partly
spherical form placed between the shaft & the outside bearings or blocks, substantially
as described & for the purposes set forth.
(4) In a thrust shaft & block, the combination of a spherical or partly spherical main

page_text: bearing or spherical liner & thrust rings on shaft having their thrusting surfaces parts
of spheres concentric with the main spherical bearing & also the grooves in the
corresponding thrust block being concentric to the same centre substantially as
described & for the purposes set forth.
(5) The insertion of a spherical or partly spherical liner or liners between the
lignum vitæ shaft bearing & the stern tube bearing or block, substantially as described
& for the purposes set forth.
(6) In a coupled length of marine engine shafting the combination of a coupling
arrangement as described a spherical or partly spherical liner between the shaft & its
outside bearings or blocks, a thrust shaft & block having the thrusting surfaces of the
thrust rings & grooves parts of concentric spheres & a stern tube bearing or block
with a spherical or partly spherical liner between the lignum vitæ bearing & stern
tube substantially as described & for the purposes set forth.
Dated this Second day of May Eighteen hundred & ninety-eight (1898).