DC power supply unit
Datecirca 1950
Inventory Number2007-1-0085
ClassificationPower Supply
Subject
Maker
Electron Arc, Inc.
fl. 1943
User
Mineralogical Museum, Harvard University
founded circa 1775
Cultural Region
Place of Origin
Dimensions16.5 × 18 × 32.2 cm (6 1/2 × 7 1/16 × 12 11/16 in.)
power cord: 151.5 cm (59 5/8 in.)
box: 17.8 × 36.2 × 20.6 cm (7 × 14 1/4 × 8 1/8 in.)
power cord: 151.5 cm (59 5/8 in.)
box: 17.8 × 36.2 × 20.6 cm (7 × 14 1/4 × 8 1/8 in.)
Material
Accessoriesbase; cover
DescriptionA rectangular gray box. The box unscrews into two components: the top/long sides and the bottom/short sides.
Along the top and long sides are thin air vents all running parallel in sets of three. This component was meant to cover the internal parts of the apparatus.
Each of the two short sides is slightly different. Out of one side emerges a thick black power cord that terminates in a round plug with two-prongs. The other side features the object's nameplate in the middle near the top, a metal switch (presumably for power) on the left, a small black dial on the right, and a circular outlet with five square holes in the middle.
The inside of the object is messy and packed. Among other things it contains: a large gray coil, a small brown capacitor, two dark boxes, and a vacuum tube. All of these smaller components are connected with bits of insulated wires, soldered in place.
Along the top and long sides are thin air vents all running parallel in sets of three. This component was meant to cover the internal parts of the apparatus.
Each of the two short sides is slightly different. Out of one side emerges a thick black power cord that terminates in a round plug with two-prongs. The other side features the object's nameplate in the middle near the top, a metal switch (presumably for power) on the left, a small black dial on the right, and a circular outlet with five square holes in the middle.
The inside of the object is messy and packed. Among other things it contains: a large gray coil, a small brown capacitor, two dark boxes, and a vacuum tube. All of these smaller components are connected with bits of insulated wires, soldered in place.
Signedon plaque, on side, in cursive: Electron Arc, Inc. / 57 MUNRO ST. / LYNN, MASSACHUSETTS
Inscribedon plaque, on side: D.C. POWER SUPPLY / ___ WATT SUPPLY / INPUT 117 VOLTS 60 CYCLES ___ WATTS
etched or punched into first blank above: 100
on side of plaque: 31
on wire: ROYAL ELECTRIC CO., INC. 16/2 TYPE B J
Curatorial RemarksTag with instrument has the following information: "Quartz Monochromator / Produced at Harvard by / Cornelius Hurlburt c. 1950's ? / (Ask Prof. Hurburt for more information). / Delivered to the CHSI on 5/26/93 / by Bill Metropolis. Gift of / Mineralogical Museum".
FunctionThis device converts electrical power from the AC supplied by a utility company to the DC form needed for a specific device.
ProvenanceDelivered to the CHSI on 5/26/93 by Bill Metropolis. Gift from the Mineralogical Museum, Harvard University.
Polaroid Corporation
Date: 2003
Accessories: printer ribbon, power cable, adapter cable, original packing materials, instruction manuals (in object file), and gray card (in object file)
Object number: 2009-1-0039
Nachet et Fils (I)
Date: 1862
Accessories: 1 cup diaphragm, 1 diffuser; camera lucida; stage and eyepiece micrometers; liquid trough; 3 dissecting knives; prepared slides in box (1157d); 3 prepared slides loose; plain slides; cover glasses; bull's eye on jointed arm(1157e); Amici's illuminator prism with stand (1157f); compressorium (1157g); case with parts box (1157c).
Object number: 1157c
ACME Apparatus Company
Date: 1930-1950
Accessories: handle; black cylindrical component; wrapping newspaper
Object number: 1997-1-0516
John Bleuler
Date: circa 1790
Accessories: wooden storage case
three ivory tiles fallen off the instrument
two original curatorial cards
Object number: DW0454
Richard Frères
Date: circa 1886
Accessories: small wooden box; ink; droppers
Object number: 1996-1-0154
See also/See also
