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A 0-10amp AC Ammeter by Weston Electrical Instrument Co., Newark NJ, Late 19th/Early 20th Century.
A 0-10amp AC Ammeter by Weston Electrical Instrument Co., Newark NJ, Late 19th/Early 20th Century. Serial number 62702. H: 3 3/4 W: 7 D: 6 3/4...
An AC Ammeter by Weston Electrical Instrument Co., Newark NJ, Patented 1898. Model number 155.
An AC Ammeter by Weston Electrical Instrument Co., Newark NJ, Patented 1898. Model number 155. ...[more]
A Thomson Alternating Ammeter by the General Electric Co., Patented July 18, 1895. Reading 0-50amps.
A Thomson Alternating Ammeter by the General Electric Co., Patented July 18, 1895. Reading 0-50amps. H: 7 W: 6 5/8 D: 4 3/8 ins. ...[more]
A Portable Transformer Type Ammeter by Westinghouse, 20th Century. Serial number 2377532. Tested
A Portable Transformer Type Ammeter by Westinghouse, 20th Century. Serial number 2377532. Tested 5-9-1949. H: 4 W: 8 D: 7 ins. Proceeds to ...
A Voltmeter by Nalder Bros. & Co., 20th Century. Measuring 60-120 volts. H: 9 7/8 W: 8 1/2 D: 11
A Voltmeter by Nalder Bros. & Co., 20th Century. Measuring 60-120 volts. H: 9 7/8 W: 8 1/2 D: 11 3/4 ins. Proceeds to benefit the Case Weste...
A Multi-Range Ammeter by Precision Apparatus Co., Brooklyn, ca. 1950. Serial number 338. H: 6 W:
A Multi-Range Ammeter by Precision Apparatus Co., Brooklyn, ca. 1950. Serial number 338. H: 6 W: 10 D: 8 3/4 ins. Proceeds to benefit the Ca...
An Electrostatic Voltmeter, Late 19th/Early 20th Century. H: 13 3/4 W: 8 ins. Proceeds to benefit the Case Western Reserve University Dayton M...
A Combination Volt-Ammeter by Western Electrical for a Baker-Electric Automobile, Design Patent
A Combination Volt-Ammeter by Western Electrical for a Baker-Electric Automobile, Design Patent 1898. ...[more]
A LaFayette Multi-Tester CAC Volt, DC Volts, DC Amp Resistant and Decibels, Mid-20th Century. Having
A LaFayette Multi-Tester CAC Volt, DC Volts, DC Amp Resistant and Decibels, Mid-20th Century. Having original leads and instructions. In a 'Kodak ...
An AC/DC Vacuum Tube Voltmeter by General Radio Corp., Mid-20th Century. 6 voltage ranges from 0.5-
An AC/DC Vacuum Tube Voltmeter by General Radio Corp., Mid-20th Century. 6 voltage ranges from 0.5-150 volts. ...[more]
A Vacuum Tube Voltmeter with Original Test Leads by Heathkit, 20th Century. H: 7 1/9 W: 4 5/8
A Vacuum Tube Voltmeter with Original Test Leads by Heathkit, 20th Century. H: 7 1/9 W: 4 5/8 ins. ...[more]
An 'Electronic Circuit Master' or Vacuum Tube Voltmeter by Philco, Mid-20th Century. Model 001. H:
An 'Electronic Circuit Master' or Vacuum Tube Voltmeter by Philco, Mid-20th Century. Model 001. H: 10 W: 6 1/4 D: 4 1/2 ins.Meter glass part...
A Volt Ohm-Milliameter by Hickok Electrical Co, Cleveland OH, 20th Century. Model number 955 with
A Volt Ohm-Milliameter by Hickok Electrical Co, Cleveland OH, 20th Century. Model number 955 with note on scale multiples dated 7-20-50 and World ...
A Wheatstone Bridge by Edelmann, Muchen, Late 19th/Early 20th Century. Interior galvanometer appears
A Wheatstone Bridge by Edelmann, Muchen, Late 19th/Early 20th Century. Interior galvanometer appears to have been removed. There are provisions f...
A Low Resistance Rheostat by Will Young and Co., Philadelphia, Late 19th/Early 20th Century. Probably capable of being used as a low resistance Si...
A Low Resistance Siemens Style Bridge Labeled Hartmann and Braun A.G., Frankfurt A.M., Early 20th
A Low Resistance Siemens Style Bridge Labeled Hartmann and Braun A.G., Frankfurt A.M., Early 20th Century. Numbered 448. H: 45 1/4 W: 8 1/2 in...
An Electrical Apparatus by Hartmann and Braun, Frankfurt, 20th Century. Having two slide wire
An Electrical Apparatus by Hartmann and Braun, Frankfurt, 20th Century. Having two slide wire rheostats, a two key momentary contact switches with...
A Wheatstone Bridge by Leeds & Northrup Co., Philadelphia, 20th Century. Used for determining wire
A Wheatstone Bridge by Leeds & Northrup Co., Philadelphia, 20th Century. Used for determining wire sample resistance. H: 2 W: 19 5/8 D: 8 1/4 ...
A Slide Wire Resistor, 20th Century. H: 1 5/8 W: 23 1/2 D: 6 1/4 ins. Proceeds to benefit the Case Western Reserve University Dayton Miller ...
A Student-Grade Wheatstone Bridge by Leeds and Northrup, Philadelphia, Mid-20th Century. Together
A Student-Grade Wheatstone Bridge by Leeds and Northrup, Philadelphia, Mid-20th Century. Together with a Leeds and Northrup Co. Resistance Decade ...
A Resistance Decade Box by Chicago Apparatus Co., Chicago, Early 20th Century. Together with a Leeds
A Resistance Decade Box by Chicago Apparatus Co., Chicago, Early 20th Century. Together with a Leeds and Northrup Co. Decade Capacitance Box (Earl...
A Group of Three Resistance Decade Boxes, Late 19th/Early 20th Century. One labeled Queen and Co.
A Group of Three Resistance Decade Boxes, Late 19th/Early 20th Century. One labeled Queen and Co. H: 9 3/4 W: 5 1/2 D: 3 ins. Proceeds to b...
A Rheostat Switch Box with Resistors Labeled A-R by Central Scientific, Chicago, 20th Century.
A Rheostat Switch Box with Resistors Labeled A-R by Central Scientific, Chicago, 20th Century. Having interior coils, possibly from hysterisis app...
A Wheatstone Bridge with Provisions for an External Galvanometer and Battery by Leeds & Northrup
A Wheatstone Bridge with Provisions for an External Galvanometer and Battery by Leeds & Northrup Co., Philadelphia, Late 19th/Early 20th Century. ...
An Electrical Resistor Decade Box by Leeds & Northrup Co., Philadelphia, 20th Century. Numbered
An Electrical Resistor Decade Box by Leeds & Northrup Co., Philadelphia, 20th Century. Numbered 6203. Having copper fittings. H: 5 1/8 W: 8 1/4...
A Resistance Decade Box by Chicago Apparatus Co., 20th Century. H: 5 3/4 W: 7 5/8 D: 4 3/8 ins. Proceeds to benefit the Case Western Reserve...
A Circular Ring Coil by Central Scientific Co., Chicago, Inspected on 11-2-1933. Together with a
A Circular Ring Coil by Central Scientific Co., Chicago, Inspected on 11-2-1933. Together with a Momentary Contact Laboratory Switch (Early 20th C...
A Potentiometer Resistance Element by Leeds & Northrup, Philadelphia, 20th Century. Numbered 618490.
A Potentiometer Resistance Element by Leeds & Northrup, Philadelphia, 20th Century. Numbered 618490. H: 4 1/4 W: 9 5/8 D: 11 3/8 ins. Procee...
A Type 625A Wheatstone Bridge by the General Radio Co., Cambridge MA, 20th Century. Complete with
A Type 625A Wheatstone Bridge by the General Radio Co., Cambridge MA, 20th Century. Complete with a number of plug-in resistances. Dial reads 0-1...
A Resistance Cross, Late 19th/Early 20th Century. H: 5 D: 5 3/4 ins. Proceeds to benefit the Case Western Reserve University Dayton Miller Sch...
A Resistance Decade Box for Balance by J. White, Glasgow, 20th Century. Numbered 265. H: 7 7/8
A Resistance Decade Box for Balance by J. White, Glasgow, 20th Century. Numbered 265. H: 7 7/8 W: 13 3/4 D: 10 ins. Proceeds to benefit the ...
An 8 Watt Ballast and Strobe Light by General Electric, 20th Century. Numbered 58G61 and labeled: 8 Watt fluorescent lamp, 118 volts, .175amps, a...
A Variable Inductance, Early 20th Century. H: 14 W: 14 D: 4 3/8 ins. Proceeds to benefit the Case Western Reserve University Dayton Miller S...
A High Current Adjustable Carbon Rheostat, Late 19th/Early 20th Century. H: 20 1/2 W: 7 1/8 D: 7
A High Current Adjustable Carbon Rheostat, Late 19th/Early 20th Century. H: 20 1/2 W: 7 1/8 D: 7 1/8 ins. ...[more]
An Induction Coil, Late 19th/Early 20th Century. Probably originally having a 3 inch spark.Needs a
An Induction Coil, Late 19th/Early 20th Century. Probably originally having a 3 inch spark.Needs a repair. ...[more]
A Siemens Style Electrodynamometer with Protective Cover by Leeds and Northrup Co, Philadelphia,
A Siemens Style Electrodynamometer with Protective Cover by Leeds and Northrup Co, Philadelphia, Late 19th/Early 20th Century. H: 9 1/4 D: 4 1/4...
A Call Box by Western Union, Late 19th/Early 20th Century.
A Telegraph Pen Register with Tape Roll by J.H. Bunnell & Co., Brooklyn NY, Late 19th/Early 20th
A Telegraph Pen Register with Tape Roll by J.H. Bunnell & Co., Brooklyn NY, Late 19th/Early 20th Century. 'New' old stock. ...[more]
A Telegraph Five-Hole Paper Tape Punch Manfactured by the J. H. Bunnell & Co., 20th Century. Used
A Telegraph Five-Hole Paper Tape Punch Manfactured by the J. H. Bunnell & Co., 20th Century. Used for approximately 5/8 inch wide paper. H: 6 W:...
A Telegraph Key for a Radio Transmitter, 20th Century.
A Telegraph Key, Late 20th Century.
A Polarizing Telegraph Relay By J.H. Bunnell & Co., Brooklyn NY, 20th Century.
A Polarizing Relay by J.H. Bunnell & Co., NY, Early 20th Century. 20 ohms. ...[more]
A Combination Main Line Telegraph Relay and Sounder, 20th Century. Stamped 375 ohms. ...[more]
A Combination Pony Relay-Sounder, Early 20th Century.
A Telegraph Sounder Mounted on a Sound Resonating Enclosure, Early 20th Century. H: 14 1/2 ins.
A Telegraph Sounder Mounted on a Sound Resonating Enclosure, Early 20th Century. H: 14 1/2 ins. ...[more]
A Telegraph Key and Sounder Combination Mounted on a Board with a Terminal Block and Insulated
A Telegraph Key and Sounder Combination Mounted on a Board with a Terminal Block and Insulated Box, ca. 1900. Having a wire wound resistor and two...
A Sounder and Key Combination, Late 19th Century.
A Combination Main Line Telegraph 35ohm Relay-Sounder Mounted on Board with Telegraph Key, Late
A Combination Main Line Telegraph 35ohm Relay-Sounder Mounted on Board with Telegraph Key, Late 19th/Early 20th Century. Key and board stamped W.U...
An Electrical Item by Leeds & Northrup Co., Philadelphia, Early 20th Century. H: 6 1/2 W: 7 3/
An Electrical Item by Leeds & Northrup Co., Philadelphia, Early 20th Century. H: 6 1/2 W: 7 3/4 D: 6 5/8 ins. Proceeds to benefit the Case W...
A Circuit Breaker, Early 20th Century.
An Ayrton-Mather Universal Shunt by W.G. Pye & Co., Cambridge MA , Early 20th Century. Total
An Ayrton-Mather Universal Shunt by W.G. Pye & Co., Cambridge MA , Early 20th Century. Total resistance=10,000 OHMS. Fitted with copper coils. H:...
A Three-Wire Knife Switch, 20th Century.
A Momentary Contact Switch with Two Parallel Keys, Early 20th Century. Can be used in open or closed
A Momentary Contact Switch with Two Parallel Keys, Early 20th Century. Can be used in open or closed mode. H: 3 1/2 W: 3 3/4 D: 5 1/2 ins. P...
A Single Momentary Contact Switch Normally Closed by Newman-Stern Co., Cleveland OH, 20th Century.
A Single Momentary Contact Switch Normally Closed by Newman-Stern Co., Cleveland OH, 20th Century. Having two switches on one base. H: 2 3/4 W: ...
A Normally Closed Momentary Contact Switch by Newman-Stern Co., Cleveland OH, Early 20th Century. H:
A Normally Closed Momentary Contact Switch by Newman-Stern Co., Cleveland OH, Early 20th Century. H: 2 3/4 W: 5 1/2 D: 4 3/8 ins. Proceeds t...
A Lighting Arrester, Late 19th/Early 20th Century. Possibly used in a telegraph service. Stamped MESCO. H: 1/2 W: 5 1/2 D: 3 5/8 ins. Proceeds ...
A 5 NF Microfarad Condenser by Leeds & Northrup Co., Philadelphia, Late 19th/Early 20th Century.
A 5 NF Microfarad Condenser by Leeds & Northrup Co., Philadelphia, Late 19th/Early 20th Century. Serial number 13567. H: 5 1/2 W: 5 5/8 D: 5 5...
A Potentiometer by Leeds & Northrup Co., Philadelphia, 20th Century. H: 4 1/8 W: 13 1/4 D: 7 3/4
A Potentiometer by Leeds & Northrup Co., Philadelphia, 20th Century. H: 4 1/8 W: 13 1/4 D: 7 3/4 ins. Proceeds to benefit the Case Western R...
A Pony Relay by J.H. Bunnell & Co., NY, Early 20th Century. 375 ohms. ...[more]
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