Improvements in Circular Saws or Circular Sawing Machinery.
Year: 1892

page_text: COMPLETE SPECIFICATION.
Improvements in Circular Saws or Circular Sawing Machinery.
I BERNHARD HAUSMANN of Blomberg, Principality of Lippe, Hanover, in the
Empire of Germany, Sawyer 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 pertains, to circular saws or sawing machinery, and consists first, in
making the saw in the form of a ring, wheel, band, hoop or the like, having an
entire middle clearance, secondly, in mounting the said ring saw, thirdly, in driving
the same, and fourthly, the general construction of the framing.
Figure 1 of the accompanying drawing, represents in side elevation, circular saw
machinery, constructed and arranged according to my invention.
The saw is constructed after the manner of a ring or annulus, with the teeth
upon its outer periphery, and with the said saw supported by rollers or anti-friction
rests, fitted to the inner periphery, whilst the said ring saw is driven by frictional
contact, in the form of friction wheels, pressing upon the metal of the saw.
It will be seen that the said saw is spindless, hence leaving a clearance at its
middle part, whereby a greater mechanical advantage is attained.
Figure 2 represents the said sawing appliance in front elevation, with the right
hand supporting sheave in section upon the dotted line A. B Figure 1 showing how
the inside periphery of the ring saw, rests within the grooves of the said sheaves,
and also how the ring is driven by the friction rollers or wheels coming in contact
with its sides.
Figure 3 represents a topside plan of Figures 1 and 2.
The same letters of reference indicate corresponding parts in Figures 1 to 3.
a is a circular saw, made or constructed in the form of a ring, annulus or circular
band, with teeth a³, upon its outer periphery, and a plain edge a³ upon its inner
periphery. bare grooved pulleys or sheaves, supported and turning loosely upon
axles b', and between bifurcated ends 62, of supporting brackets or arms 63, 6',
directed horizontally outwards from an upright framing, carried from a base
framing 6, having an end upright 66. This ring saw a, has an entire middle
clearance, and is driven by friction driving wheels c, c, acting upon the faces a*, of
the saw at two opposite points, and coming opposite to idle friction wheels or
followers d, d', working within bearings d² formed within the ends of the arms b³.
These idle wheels form friction bearers, for giving the necessary rotary motion to
the saw.
The friction wheels c, c', are made fast upon spindles &², having at their inner
ends, cones or bevel wheels c³, which come in contact or intergear with a cone or bevel
wheel e, made fast on the axle e², having fast and loose driving pulleys e³, et, and
which axle or shaft e³, turns within bearings 68, made within the main framing of
the machine.
The axles, which carry the friction cones or bevel wheels c³, work within
bearings c, of the main framing.
It will be seen that the upper pair of bearing sheaves, support and guide the
saw at its upper part, whilst the lower pair of sheaves, guide only.
The saw is mounted or placed between the supporting sheaves and guides prior
to the passing through the said sheaves, or a portion of them, of the spindles or
axles upon which they turn.
The friction wheels c, c', are made to impress themselves with sufficient pressure
the said pressure may
to give the necessary rotation to the saw, and if necessary,
be yielding.
Both the driving friction wheels, and the bearing friction wheels may be driven.

page_text: The object to be sawn is placed upon a bed in the usual way, and fed up to the
outside periphery of the middle part of the saw
The sawing appliance may be arranged horizontally instead of vertically and
the saw may be driven if necessary by arranging teeth within the 'inside periphery
of it, and driven by spur or other gearing, and, further; instead of driving the said
saw by frictional contact, the faces of the same may be pierced with holes, arranged
at equi distances apart, and wherein the teeth of driving wheels engage.
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 :-
First A ring saw, consisting of a circular band, ring, or annulus, having a
middle clearance, and teeth upon its outer periphery...
Secondly-In a ring saw, supporting, guiding, and keeping concentrically the
said saw, by means of rollers or sheave rollers, mounting and working substantially
as and for the purpose, as set forth.
:
1
Thirdly-Driving ring saws by, or through the instrumentality of, friction
wheels, acting upon the faces of the said saw, or by the teeth of driving wheels.
engaging within piercings made around the saw, substantially as described and set
forth..
Fourthly:The improvements in the construction and arrangement of the parts.
of sawing machinery, as described and set forth.
Dated this 14th day of June 1802
BERNHARD HAUSMANN,
By Henry Skerrett,
6, Livery Street, Birmingham, Agent for Applicant.