Experiment Station Record, Volume 92, January-June, 1945 Page: 122
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122 EXPERIMENT STATION RECORD [Vol. 92
blower causes very slight additional cracking when run at recommended speeds. However,
if the blower is run above recommended speeds additional cracking is noticeable.
Frequent minor changes may be necessary in concave clearance or cylinder
speeds, or both, during the day to compensate for changes in temperature or in the
moisture content of straw and grain.
What speed of operation for a potato digger causes the least amount of injury,
T. E. LONG (North Dakota Sta. Bimo. Bul., 6 (1944), No. 6, pp. 15-19, illus. 7).The
speed of 47 potato digger aprons and the percentage of major and minor injuries
were recorded during the 1942 and 1943 seasons to find a relationship between the
speed of the digger apron and the amount of injury.
The summation of all the data showed the lowest percentage of injury when the
digger apron was operated between 220 and 240 ft. per minute. The results from
the three individual diggers checked showed the lowest percentage of injury when
the digger apron was operated at approximately 210 f. p. m. There was a definite
similarity between the curves representing the 47 diggers and the three individual
diggers. The linear regression of the data from all the diggers showed no significant
straight line relationship.
Sacker attachment for power-driven potato digger, 0. W. MONSON et al.
(Montana Sta. Cir. 180 (1944), pp. 8, fig. 1).--The Montana potato-sacking attachmnent
consists of a secondary power-driven apron or conveyor, attached to the
digger, which conveys the potatoes from the digger to a sacking hopper instead of
letting them fall to the ground. Small platforms are provided on either side of'
the machine on which workers stand to remove rocks, clods, and vines as the
potatoes are carried to the sacking hopper. Stock parts are used as much as possible
and the construction of the entire machine, including frame and moving
parts, involves only simple blacksmithing and arc welding operations. A mechanical
description, bill of materials, and drawings are included in the circular, and
working blue prints are available from the station.
Preventing cotton-press damage (U. S. Dept. Agr. Leaflet 241 (1944), pp.
8, figs. 5).-During the pressing of cotton at gins, overweight and irregularly
packed bales cause undue stress on the tramper and press and cause costly and
untimely break-downs. Extra time may be required to tie out these bales. They
are also difficult to handle and load for transportation from the gin to the warehouse
and cause complications in storage. During compression, heavy-weight bales
produce extra strain on compress equipment and delay the pressing and handling
operations, causing loss in time and additional expense.
It is suggested that cotton growers should send to the gin only quantities of seed
cotton that will produce bales weighing from 450 to 550 lb. The ginner can divide
lots of seed cotton on wagons or trucks in such a way as to gin uniform-weight
bales when there are two or more bales from the same farm, and he can encourage
the grower to provide some kind of a partition for keeping cotton for each
bale separate on the wagon or truck. During ginning, the lint must be evenly distributed
in the press box in order to prevent rolling or heavy-sided bales. Such
bales result primarily from faulty action of the tramper and lint-slide kicker. The
kicker speed and action should be adjusted to synchronize with the action of the
tramper and give uniform distribution of the cotton within the press box. Since
the moisture content of cotton varies throughout the ginning season, the kicker
should be watched closely and changed from time to time to meet varying conditions.
A new design of press-box dog mechanism, recently developed at the U. S.
Cotton Ginning Laboratory, Stoneville, Miss., primarily to avoid the formation of
dog ridges in gin bales that cause the bales to cut during compression, has been
found to be effective in providing uniform distribution of the cotton through the
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U.S. Department of Agriculture. Agricultural Research Administration. Office of Experiment Stations. Experiment Station Record, Volume 92, January-June, 1945, book, 1947; Washington D.C.. (digital.library.unt.edu/ark:/67531/metadc5064/m1/135/: accessed March 21, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.