Improved Tubular Lance.
Year: 1888

page_text: Date of Application, 14th Dec., 1888
Complete Specification Left, 11th Sept., 1889-Accepted, 12th Oct., 1889
PROVISIONAL SPECIFICATION.
Improved Tubular Lance.
I, WILHELM LORENZ, of 44 Westendstrasse, of Karlsruhe, in the Grand Duchy of
Baden, German Empire, Engineer and Manufacturer, do hereby declare the nature of
this invention to be as follows:-
In tubular lances as at present constructed the lance has always been made of
a cylindrical tube of equal thickness throughout. Such lances are too heavy, both
at the spear end and at the butt end, and they offer too much surface to the air
and consequently meet with too great a resistance when being moved through the
air to allow of the lance being manipulated with the facility, power, and velocity
which is required when using the weapon in attacking or defending.
According to my present invention I obviate these disadvantages by forming the
lance so as to taper from the cylindrical middle part towards either end, such taper
being produced by rolling, compressing drawing or other suitable means whereby
the section of the lance is reduced uniformly or unequally towards the two ends.
According to the manner in which such reduction of diameter is produced, the
thickness of the metal may either he reduced or increased towards the ends, or it
may remain uniform.
Both with equal thicknesses and with decreasing or increasing thicknesses towards
the spear end or towards both ends, the above described tapering construction will
afford a considerably increased resisting power against cuts and transverse strains,
as the moments of resistance of the soctions from the one end or the other
increase considerably with the increase of diameter and of thickness, where this is
the case.
Those tapering lances may also be made of a sufficiently larger diameter
than usual at the middle, to enable them to fill a normally sized hand better than
is at present the case, such as for instance from 14 inches to 1 inches and thus
to afford a firmer grasp, without requiring the lance to be made heavier than at
present; on the contrary it may be made lighter at the same time.
The accompanying drawing shews two constructions of such tapering lances. The
spear end and butt end can be either fixed to the shaft in any known munner or
they may be formed in one therewith.
The shaft itself may also be made cither in one piece or it may consist of two
or more parts fixed together.
Dated this 14th day of December 1888.
ABEL & IMKAY,
Agents for the Applicant.
COMPLETE SPECIFICATION.
Improved Tubular Lance.
I, WILHELM LORENZ, of 44 Westendstrasse, of Karlsruhe, in the Grand Duchy of
Badon, German Empire, Engineer and 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 :-
In tubular lances as at present constructed the lance has always been made of a
cylindrical tube of equal thickness throughout. Such lances are too heavy, both at
the spear end and at the butt end, and they offer too much surface to the air and
consequently meet with too great a resistance when being moved through the air to
allow of the lance being manipulated with the facility, power, and velocity which is
required when using the weapon in attacking or defending.

page_text: According to my present invention I obviate these disadvantages by forming the
lunce so as to taper from the cylindrical middle part towards each end, such taper
being produced by rolling, compressing, drawing, or other suitable means whereby the
section of the lance is reduced either uniformly or unequally towards the two ends.
According to the manner in which such reduction of diameter is produced the
thickness of the metal may either be reduced or increased towards the ends, or it may
remain uniform.
Both with equal thicknesses and with decreasing or increasing thicknesses towards
the spear end or towards both ends, the above described tapering construction will
afford a considerably increased resisting power against cuts and transverse strains, as
the moments of resistance of the sections from the one end or the other increase con-
siderably with the increase of diameter and of thickness where this is the case. These
tapering lances may also be made of a diameter at the middle larger than usual,
sufficiently to fill a normally sized hand better than is at present the case; the middle
may be increased, for instance, from 1 ins. to 14 ins., thus affording a firmer grasp,
without requiring the lance to be made heavier than at prosent, on the contrary it may
be made lighter at the same time.
The drawing accompanying my Provisional Specification shews two constructions
of such tapering lances. The spear end and butt end can be either fixed to the shaft
in any known manner, or they inay be formed in one piece therewith.
The shaft itself may also be made in one piece or it may consist of two or more
parts fixed together.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
A lance having its shaft tapering to a smaller diameter from the middle towards
oither end or towards both ends, the metal being of either uniform or of varying
thickness throughout the length.
Dated this 10th day of Santamber 1889
ABEL & IMRAY,
Agents for the Applicant.