Bauhaus-Universität Weimar

Titel:
L. E. Knott Apparatus Company: Scientific Instruments, Catalogue 26
Person:
Knott, L. E.
PURL:
https://digitalesammlungen.uni-weimar.de/viewer/image/lit13684/264/
SCIENTIFIC INSTRUMENTS 
259 
6695 CONSTANT TEMPERA¬ 
TURE ELECTRIC INCUBATOR 
This incubator is built of clear 
well-seasoned, kiln-dried wood 
finished in white laboratory 
enamel. An inner glass door is 
provided to allow inspection with¬ 
out exposing the contents to the 
cold outside temperature. 
The heating element is removable 
and covers the bottom of the 
chamber. It cannot get out of 
order or burn out. The control 
element or regulator, which is ad¬ 
justed from outside the chamber, 
will maintain the temperature 
to within a half degree of that 
desired. A pilot lamp is fitted 
outside the chamber to enable 
the operator to quickly adjust 
the regulator to the temperature 
desired. 
Size of chamber 12 X12 X12 inches. Mounted on cast iron 
base to set on the table. With detachable cord and plug. $83.25 
5695A--, same as above, but size of chamber, 18x18x26 
inches...........................................122.25 
5695C--, same as No. 5695, but size of chamber, 28X36X18 
inches...........................................177.75 
5695D --, same as No. 5S95C, but mounted on angle iron stand 
to rest on the floor (see illustration of No. 5696A). . . 200.00 
No. 5696A 
5696 FREAS’ CONSTANT TEMPERATURE ELECTRIC 
INCUBATOR, constructed of heavy asbestos wood with cast aluminum door and door frame. 
The interior is fitted with aluminum racks for perforated metal shelves. Inner door is of heavy 
glass fitted in an aluminum frame, cushioned with felt to exclude air. 
Heating element is a removable wire wound resistance plate wound for 75 watts. Temperature 
range is from one degree above surrounding air to 70° C. The Freas’ Regulator will maintain 
the desired temperature indefinitely to within a fraction of a degree. 
Two switches are provided — one for the current — the other for the electric lamp for illuminating 
the chamber. Size of chamber, 12X12X12 inches........................................$155.75 
5696A--, same as above, but size of chamber, 16X14X16 inches, and mounted on iron stand as illus¬ 
trated................................................................................ 261.26 
5696B--, same as No. 5696A, but size of chamber, 18X16X18 inches............................. 290.00 
5696C--, mounted on stand. Same as No. 5696A, but size of chamber, 26X14X20 inches, with two 
doors meeting at a center column dividing the front opening................................ 366.76 
5696D -, same as No. 5696C, but size of chamber, 40X18X25 inches............................ 433.50 
6697 CONSTANT TEMPERATURE ELECTRIC “ LOWTEMP ” INCUBATOR for gelatine culture 
cultivations at 20 degrees Centigrade. May be used equally well at temperatures from 10 to 40 
degrees Centigrade and lower than 10 degrees Centigrade by employing suitable cooling mixtures. 
The working chamber consists of a double-walled heavy copper vessel provided with three perforated 
metal shelves and suitable racks for adjusting the shelves to different heights. The chamber is 
fitted with a glass door cushioned with felt. 
The incubator body is made of wood insulated with felt, dead air spaces, etc., ten walls in all. The 
outside is entirely sheathed with steel plate covered with porcelain fused on at high temperature. 
Trimmings are polished cast aluminum. 
The heating element consists of a wire wound resistance plate situated directly under the working 
chamber. 
The regulator is operated from the outside of the chamber. A pilot lamp is fitted outside to enable 
the operator to quickly adjust the regulator to the desired temperature. A switch is provided for 
turning the current “ on ” or “ off.” 
The insulation of this incubator is so perfect that one filling of the ice chamber will last for several 
days under normal summer laboratory temperatures. The regulator will maintain indefinitely a 
constant temperature to a degree Centigrade. 
The incubator is mounted on a heavy iron base. Size of working chamber, 18X15X12 inches. 438.75 
When ordering Incubators, state voltage of current.
        

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