IMPROVE- MENTS IN MACHINES FOR HAULING IN ROPES AND FISHING NETS
Year: 1883

page_text: PROVISIONAL SPECIFICATION left by John Harper Junior at the Office of
the Commissioners of Patents on the 28th June 1883.
JOHN HARPER Junior of the Albion Ironworks Aberdeen, Scotland " IMPROVE-
MENTS IN MACHINES FOR HAULING IN ROPES AND FISHING NETS"
This Invention has for its object improvements in machines for hauling in fishing
nets or ropes for raising masts and for other such like purposes.
For this purpose I form such machines with three grooved pullies or drums
ranged in a triangle as is usual so that when the rope secured along the edge of a
net is passed over and under them and they are rotated the rope will be drawn in.
Each drum I cast in one piece with a toothed wheel surrounding its base and I
mount the three drums with the toothed wheels upon them on threo pins or studs
which project out from one side of an upright standard.-The toothed wheels are
placed next to the standard and the standard on this side I form with a projecting
flange which passes closely around the circumference of the wheels and forms a
guard for thein.
Two of the studs are on the same horizontal line the third stud is at a lower
level and the toothed wheel of the drum which is mounted upon it gears with the
toothed wheels of the drums which are mounted upon the two other studs.
The toothed wheel of the drum which is mounted on the lower stud has gearing
with it a pinion that has fast with it a pinion of larger diameter-this larger
pinion lies in a rocess formed in the standard. The driving axis is carried iu
bearings at the top of the standard-it has upon it a toothed wheel which cau be
made to gear eithior with the toothed wheel of one of the upper drums or by
sliding the shaft endwise can be made to gear with the larger pinion which lies in
the recess above mentioned. The toothed wheel on the shaft can so be caused to
directly drive the drums or to drive them at a slower speed through the inter-
mediate pinions above mentioned. The shaft can be retained either in position to
drive at the slower or the faster speed by a pin made to enter one or other of two
grooves in the shaft. The shaft is usually driven by crank handles upon it but it
might be otherwise driven.
Above the toothed wheel of one of the upper drums the flange which passes
around the top of the standard carries on its outer side a pin upon which is mounted

page_text: a two armed pawl.-Two slots are formed through the flange. When the pawl is
turned over in one direction one of its arms passing down through one of the slots
engages with the teeth of the wheel and prevents its turning in one direction and
when the pawl is turned over in the opposite direction the other arm passing down
through the other slot prevents the wheel from turning in the other direction. In
this way the pawl is quite clear of the gearing and can be readily got at.-In
order to avoid wear on the rope and to increase the hold upon it I surround each
drum with a thick ring of vulcanized india rubber which lies at the bottom of the
groove in the drum.-Machines constructed as above described are simpler more
compact and less liable to derangement than other machines hitherto used for the
Same-Durnose..