Improvements in the Cutters of Wood-planing Machines.
Year: 1886

page_text: Date of Application, 22nd Sept., 1886.
Complete Left, 10th June, 1887.
Complete Accepted, 12th July, 1887.
PROVISIONAL SPECIFICATION.
Improvements in the Cutters of Wood-planing Machines.
We JOHN RAWLINGS of 78 Hackney Road London in the County of Middlesex
Dealer in Spiral Cutter Machinery and JOHN PICKLES and GEORGE PICKLES both of
the Firm of John Pickles and Son of Hebden Bridge in the County of York
Engineers do hereby declare the nature of this invention to be as follows:-
A method of making the Blades or Cutters and the Cutter Block so called or the
Blades or Cutters the Cutter Block and the Spindle or Shaft from a solid piece of
Steel or other metal either cast or wrought.
The Cutter Block which includes two or more Blades or Cutters is cast hollow thus
avoiding unequal contraction or expansion and consequent strain in the process of
casting or cooling or in after tempering as in the case of wrought Cutters and
Block which are cut from a solid block of metal.
In the case of a hollow cast or a hollow wrought Cutter Block it is fitted to a Spindle
or shaft and is affixed thereto by means of screw collars also fitted to the Spindle or
shaft which set the Cutter Block concentric with such Spindle or Shaft and in this
respect the Cutter Block is easily and readily attached to or detached from the cutter
spindle.
Dated this Tocantinth day of Santamber 1886

page_text: We JOHN RAWLINGS of 78 Hackney Road London in the County of Middlesex
Dealer in Spiral Cutter Machinery and JOHN PICKLES and GEORGE PICKLES both of
the Firm of John Pickles and Son of Hebden Bridge in the County of York
Engineers 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 :-
We make the blades or cutters and the cutter block so called together in one peice
of steel or other suitable metal either cast or wrought thus avoiding the use of the
usual screws or bolts for fixing the blades to the cutter block This method bears
reference more particularly to the manufacture of spiral or twisted cutters The cutter
block which includes two or more blades is made cylindrical and which is fitted to the
spindle or shaft and is fixed to the same by means of collars also fitted to the spindle
The collars are made slightly tapering on their larger diameter which taper part is
fitted into the ends of the cutter block The collars are pressed into their proper
position by screwed nuts also fitted to the spindle to hold the cutter block rigid to and
concentric with the spindle The two screws on the spindle and the nuts are made with
right and left threads respectively which automattically tighten the collars in case of
any slipping on the spindle By this method of fixing the cutter block to the spindle
it is easily and readily attached to and detached from it in case of renewal or repairs
The barrel of the cutter block and the blades should be made of equal thickness to
avoid unequal expansion and contraction and consequent strain by heating and cooling
in after tempering We are aware that taper collars and screws are methods before
used for fixing similar objects and are mentioned here only as pointing out the means
whereby to accurately and securely fix the block and blades to the spindle and does
not comprise any part of our claim.
In the accompanying Drawing Fig. 1 represents a side view of the cutter and block
and Fig. 2 shows an end section of the same A is the cutter spindle. B the taper
collars. C the fixing nuts.
D the blades or cutters. E the cutter block.
Having now particularly described and ascertained the nature of our said invention
and in what manner the same is to be performed we declare that what we claim is
1st. The construction of a cutter block and cutting blades in one piece of metal
either wrought or cast for wood-planing machines substantially as set forth and shown
in the Drawing.