Improvements in Apparatus for Raising and Lowering the Tables of Circular Saw Benches or any Rising and Falling Tables.
Year: 1887

page_text: Date of Application, 19th Apr., 1887
Complete Left, 17th Jan., 1888
Complete Accepted, 17th Feb., 1888
Improvements in Apparatus for Raising and Lowering the Tables
of Circular Saw Benches or any Rising and Falling Tables.
I CORNELIUS REDMAN of Hare Street Machine Works Halifax in the county of
York Machine Maker, do hereby declare the nature of this Invention to be as
follows:-
I employ a central shaft running across the frame of the saw bench, the rising and
falling table has two racks into which gear pinion wheels on the said shaft, the first
pinion wheel is cast to a cycloidal wheel, working within which is a corresponding
wheel, one tooth less than the cycloidal wheel, the smaller wheel has two wings or
projections which work within two similar recesses in a loose plate, the loose plate is
held by projections on the frame, fitting into recesses in the plate; this wheel is
operated by an eccentric attached to the boss of the hand wheel, the loose plate has an
oblong hole to allow for the movement of the smaller wheel which is operated by the
eccentric, giving an upwards and downwards, and side ways motion to the smaller
wheel, and a side ways motion to the plate; by this means the cycloidal wheel is
turned, the pinions operate the racks, and a great weight can be lifted with ease, and
is of easy construction, and the bench or table will stop at any point.
JOHN E. WALSH,
Crossley Street, Halifax,
Agent for the Applicant

page_text: improvements in Apparatus for was anu Dowori05
CHO LACROS
of Circular Saw Benches or any Rising and Failing Tables.
I CORNELIUS REDMAN of Pioner Works, Hare Street, Halifax in the county of
York, Machine Maker, 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 object of my invention is to construct circular saw benches with rising and
falling tables, and only one shaft for operating the same.
DESCRIPTION OF DRAWINGS.
Fig. 1 is a side elevation in section of saw bench with two racks.
Fig. 2 is an end view of Fig. 1.
Fig. 3 is a side elevation of saw bench with only one central rack.
Figs. 4 and 5 are enlarged details of cycloidal gearing and eccentric.
Figs. 1 and 2. I employ a central shaft A, running across the frame B of the saw
bench, the rising and falling table may have either one or two racks C, into which
gears,a pinion wheel E on the said shaft, the pinion wheel E is cast to a cycloidal
wheel F, working within which is a corresponding wheel G, having one tooth less
than the cycloidal wheel F, the smaller wheel has two or more wings or projections H,
which work within two similar recesses J, in a loose plate K, the loose plate is held
by the projections J¹ upon the frame, in the recesses H¹ in the plate; this wheel is
operated by an eccentric or tappet L, attached to the boss M of the hand wheel N, the
loose plate K has an oblong hole P, to allow for the movement of the smaller wheel
which is operated by the eccentric, the eccentric giving an upwards and downwards
motion and a side ways motion by the smaller wheel, also a side ways motion to the
plate, by this means the cycloidal wheel is turned and the pinion operates the rack or
racks, whereby a great weight can be lifted with ease, and the apparatus is of easy
construction, the bench or table will stop at any point it is left at.
Or my saw bench may have only one rack cast or fi ed about the middle of the
table on the underside; into this gears the pinion wheel and cycloidal arrangement
above described, or the pinion wheel may be keyed on to a shaft supported by a
bearing on the bridge, the said shaft to be given motion to by a single worm and
worm wheel.
Having now particularly described and ascertained the nature of this invention and
in what manner the same is to be performed, I declare that what I claim is :-
The cycloidal arrangement of mechanism for operating rising and falling tables of
saw and other benches with one or more racks as and for the purposes shown and
described.
Dated this Tonth day of January 1888