DRAPER’S 
SELF-RECORDING 
THERMOMETER. 
Description and Directions. 
Don’t Destroy. 
Cf'T'C'^: ' " 
Nos. 295 6l 297 FOURTH AVENUE, 
Com* 23o 8mccT, 
NEW YORK, DRAPER'S SELF-RECORDING THERMOMETER. 
DESCRIPTION OF THE INSTRUMENT 
AND DIRECTIONS FOR ITS USE. 
SIZE 14 BY 20 INCHES. 
Protected by Letters Patent in the United States, Canada, Great Britain, 
France, Germany, Austria, Hungary and Belgium. 
STANDARDIZED AID WARRANTED. 
MANUFACTURED BY THE 
DRAPER MANUFACTURING COMPANY, 
152 FRONT STREET, NEW YORK CITY. APPLICATIONS OF THE 
Dpapep Rec©r?ding JFheprrjorrjefeep. 
There has long been a public want fora simple, in- 
expensive and reliable means, for the continuous 
register of the temperature, not only for meteoro- 
logical purposes, but also: 
IN HOSPITALS. so that physicians entering a ward in 
the hospital, can tell if the temperature of the ward 
has been kept as ordered, or if it has been too hot or 
too cold, thereby affecting the welfare of the patients. 
IN DRYING ROOMS OR OVENS, where constant tern 
peratures are required, so that the proprietor will see 
if attendants have kept them at the proper tem- 
perature. 
IN STORE HOUSES. so that the owners can see if the 
fruit, vegetables or other perishable property has 
been injured by too high or too low a temperature. 
IN BREWERIES, so that brewers can tell if the de- 
sired temperature has been kept during the process 
of brewing. 
IN GREEN-HOUSES, so that florists can see if their at- 
tendants have kept the different houses at the proper 
temperature. 
IN REFRIGERATING RAILROAD CARS. so that the com- 
pany will know at what time neglect of duty occurs* 
in allowing the cars to become too hot or too cold. 
This Thermometer is adaptable to many other uses 
too numerous to be mentioned in this circular. 
The Draper Thermometer is used as a standard 
at the 
New York Meteorological Observatory, N. Y. City. 
Hlue llill Observatory, - - Keadville, Mass. 
Harvard Observatory, - - Cambridge, Mass. 
Ardsley Park Observatory, - Irvington, N. Y. 
Wellesley College. - - Wellesley, Mass. 
Hastings Observatory, - Hastings-on-Hudson. 
And by many others all over the country. Diagram of Recording Thermometer, 
[WITH TWO THERMOMETRIC STRIPS.] Description of Diagram of Recording Thermometer. 
This instrument consists essentially of six parts: 
(1) Iron frame, (2) Clock, (If) Metal disc, (4) Two me 
tallic thermometer strips, (5) Recording pen lever, 
(6) Case. 
The letters refer to the different parts of the in 
strument, viz : 
A Clock Arbor. 
C Clock Box. 
I) Ink Pen. 
F F Arcs. 
L L Recording Lever. 
N N Metallic Thermometer Strips. 
P I* Platinum Wires. 
R Piece for Holding Thermometer Strips to 
Frame. 
S S Screws for Adjusting Recording Lever. 
W W Winding Arbors of Clock. 
X X Screw Holes for Fastening Instrument in 
Place or in Packing Box. (1) IRON FRAME. The iron frame is the backbone 
of the instrument, and to it are fastened the clock, the 
twometallic thermometer strips, the frame for holding 
the recording lever, and also the perforated case to 
protect all the moving parts. 
(2) CLOCK. It is a fine eight day spring clock 
movement, specially made for the purpose. On its 
hour arbor is placed the metal disc. 
(3) METAL DISC. It is revolved bv the clock once 
a week. To this metal disc is fastened, by suitable 
means, a paper chart which is divided into hours and 
days of the week, by radiating lines, and also Fah- 
renheit degrees of temperature from 20 degrees be- 
low zero to 110 degrees above, by concentric lines. 
(4) METALLIC THERMOMETERS. These thermom- 
eters or metallic strips are made of two metals fast- 
ened together by suitable means, one of the metals 
expanding more than the other, causes the compound 
strip to bend in one direction with an increase of 
temperature, and in the other direction with a de- 
crease of temperature, being thin and long, they pre- 
sent a large surface to the air and are, therefore, 
very sensitive to changes of temperature. 
(5) RECORDING LEVER. The recording lever 
frame is fastened to the iron frame. On the arbor 
that carries the lever are two small arcs so as to con- 
nect, by means of two fine wires, the two metallic 
thermometer strips to the lever. To this arbor is also 
fastened a frame carrying two screws for adjusting 
the ink pen on the lever to the right degree of tem- 
perature on the paper chart. 
(6) CASE. It is made of brass, nickel plated and 
perforated, so as to have a free circulation of air 
around the metallic thermometer strips, and also to 
protect them from injury. The case is fastened to 
the iron frame. Head and study carefully the folhnr- 
iny di reef Ions before attcmptiny to 
take lustra meat out of fmekiny- 
bojr. 
To take Thermometer out of Packing-Box. 
Having removed the cover of the packing-box, 
open the glass door of the thermometer while in 
packing-box, then with the right hand lift the end of 
the pen lever off the paper chart about half an inch, 
with the left hand take hold of the brass knob in the 
middle of the paper chart, revolve it backwards, and 
at the same time pull it towards you until it screws 
off from thecloek arbor. Just behind the name-plate 
on the iron frame will be found a common brass 
screw ; remove it; and the one at the top of the 
iron frame on the outside of the thermometer case. 
Close the door of the instrument. You may now 
lift the thermometer out of the packing-box without 
injury. 
To Place the Thermometer. 
Having decided upon the place where you wish 
to have the thermometer, fasten it with the two 
screws that held it in the packing-box. He sure that 
the instrument hangs plumb. 
To Set the Instrument Working. 
WIND CLOCK. Projecting through the cover of the 
clock box (C) will be found two steel winding arbors 
(NY \V) of the cloc k ; on which place the key, turn 
the top to the right, until both springs are wound up. 
TO PUT METAL DISC ON CLOCK. Take metal disc 
in the left hand, with the right hand lift the pen lever 
(D) just enough to put the hub of the disc on 
clock arbor (A). Press it on tight. TO PUT PAPER CHART ON METAL DISC. With the 
right hand lift the pen (D) about one inch from 
the metal disc. Then with the left hand place the 
hole in the paper chart on the knob of the arbor (A) 
and the edge of the chart under the clamps on the 
edge of the metal disc. Turn the metal disc with 
paper chart on it around until the proper hour of the 
day of the week comes under the point of the ink 
pen (D). The pen may now touch the paper chart, 
so as to make the record of temperature. 
TO FILL THE INK PEN. It will be found that three 
or four drops of the prepared ink from the glass 
filler will be enough to last a week. 
TO ADJUST THE CLOCK TO TIME. If the paper 
chart revolves too fast or too slow past the point of 
the ink pen, it shows that the clock needs to be reg- 
ulated. This may be done by first removing the 
metal disc with chart on it, then remove the cover of 
the clock box. On the top of the clock will be found 
the regulating lever. If you move it a little to the 
right the clock will go faster, to the iejt slower. 
The requisite amount of movement can only be 
found by trial. The box cover may now be put on, 
and the metal disc with paper chart be returned to 
its place, and the proper hour brought under the 
pen as described in a former paragraph. 
TO ADJUST THE THERMOMETER. If from any ac- 
cident the thermometer should be found to indicate 
the wrong degree of temperature it may be re- 
adjusted in the following manner : 
Remove the glass nnme-plale of the instrument by 
unscrewing the four screws at its corners, and lift it 
off. Here on an arbor will be found the two arcs 
(F F) and the lever (I,). On the lower end of the 
lever are two adjusting screws (S S). With these 
screws the position of the ink pen can be adjusted 
on the paper chart, so as to give a higher or lower 
reading of temperature. PLATINUM WIRES. II l»y any chance the platinum 
wires whi« h :onnect the ends of the thermometer 
strips (N N) to the arcs (F F) of the lever (I.) should 
get broken, you can have new platinum wires sent 
to you and easily put them on yourself, as they are 
all made of the same length and are interchangeable. 
GLASS COVER AND NAME PLATE. If by any acci- 
dent the glass in front of the chart should get broken, 
you can remove the sash by taking out the two pins in 
the hinge and send the sash to any glazier or to this 
company. Should the name-plate be broken, a new 
one can be sent you by this company. 
CLOCK STOPPING. If after a time it is found 
necessary to have the clock cleaned, it can be; re- 
moved by taking the cover off the clock box, 
and unscrewing the four screws that hold the 
clock to the iron frame. It may now be lifted out 
without doing any injury to the instrument, and 
the clock sent to any clock or watch-maker to la- 
cleaned. If any of the parts of the clock have be- 
come injured beyond repair, a new clock can In- 
supplied to tit in the place of the old one. 
All parts of the Draper Recording Thermometer 
are interchangeable and can lie sent either by mail 
or e (press C. O. D. 
71(ey^^^Bro|/jer(5. 
Ojrn'(MttV^: 
Nos 295 &. 297 FOURTH AVENUE, 
Cor. 23o Strict, 
NEW YORK.