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Page 677 of 698
Shelfmark
Maker
Cambridge Instrument Company; Limited
Title
Cambridge universal bridge
Description
The instrument aims to provide accurate measurement of resistance, inductance and capacitance over a wide range of values. Its suitability in several workplace contexts is outlined, then a detailed description in paragraph form follows, covering these topics:-
Choice of power supply;
Measuring elements;
Accuracy of measurement;
The D.C. bridge;
Power units;
Accuracy;
Flexibility;
Specifications;
Dimensions;
Cat. Nos.
Shelfmark
Maker
Geissler; H.
Title
Zweiter Nachtrag zum Preis-Verzeichniss [facsimile]: chemischer, physicalischer und meteorologischer Apparate, Instrumente und Utensilien / von Dr. H. Geissler
Description
This is a second supplement to the original catalogue of scientific instruments by Dr. Heinrich Geissler, published by Franz Muller, his successor, who has written the Foreword.
Instruments are presented in alphabetical order, in the left-hand margin the instrument's model number appears, then a small sketch and two or three lines of description.. In the right-hand margin is its price.
The list begins with item number 2399, and ends with number 2549.
The instruments featured are all related to the several disciplines mentioned in the title above.
Shelfmark
Maker
Solartron Electronic Group Ltd.
Title
Solartron integrating digital voltmeter LM 1420.2 data sheet
Description
The integrating digital voltmeter is described as an instrument of outstanding performance, making it equally suited for laboratory, or production line measurement; or at the centre of a complete digital data logging system.
Detailed information on the various models is set out under these headings:-
Digital Voltmeter LM 1420.2:
Principles of operation;
Mechanical features;
Measurement in the presence of noise;
Print-out;
LM 1420.2BA; LM 1420.2BM:
A.C. Measurement;
Specification;
Accessories
Shelfmark
Maker
Cambridge Instrument Co. Ltd.
Title
Cambridge Electronic Recorder: B: Controllers
Description
The instruments are presented as sensitive, electro-mechanical differential systems that will operate multiple switches, slidewires, digitizers, magslips, pneumatic transducers and other similar control devices.
Information about the controller is presented under these headings:-
Control Modes;
Differential System;
On-Off Control and Alarm;
Pneumatic Control;
[Specification, including cat. nos.]
Shelfmark
Maker
Philip Harris Limited
Title
Wimshurst machine with perspex plates [facsimile]
Description
Under the heading Instructions for Assembly, a detailed description covers these points:-
Cleaning all metal parts;
Positioning the plates;
The brushes;
Positioning the discharging knobs;
Connecting the Leyden jars;
The spark;
Final adjustments
Under the heading Notes several cautionary and helpful suggestions are added to ensure the efficient working of the machine.
Shelfmark
Maker
Cambridge Instrument Co. Ltd.
Title
Cambridge oscillographs
Description
Introduced as an instrument of the first importance for investigating problems of electrical transients and rapidly varying phenomena, it can produce up to twelve simultaneous records, and is intended primarily for investigating strain and vibration problems in aircraft during flight.
Information on the instruments is presented under these headings:-
Çambridge 6-element Oscillograph:-
[Brief description];
Specification;
Record taken on the 6-element outfit;
Cambridge 12-element Oscillograph:-
[Brief description];
Specification;
Test Record;
Vibrators for Cambridge Oscillographs:-
[Brief description];
|Specification;
Cambridge Oscillograph Cameras:-
Drum Camera:
[Brief description];
Specification;
Test record
Continuous Recording Camera:
[Brief description];
Specification
Test record
Cambridge 12-element Portable Oscillograph:-
[Brief description];
Specification;
Some Recent Users
Shelfmark
Maker
C.F. Casella and Co.; Ltd.
Title
Biram’s air meter and Portable air meters
Description
Each of the two models of air meter mentioned in the title appear one either side of the leaflet.
Biram’s air meter begins with a brief paragraph, explaining that its distinguishing feature is an indicating dial in the same plane as the rotating vanes so that it can be read when the user holds the meter at arm’s length upwind.
The portable air meter’s introductory paragraph recommends that this instrument is ideal for such work as ventilation engineering, being very easy to set up and use.
Each type of instrument then sets out its information under these headings:-
Principle of operation;
Construction;
General specification;
Catalogue references
Shelfmark
Maker
Maud Antoinette Duthoit
Title
No. 7264 A.D. 1914: Improvements in or relating to Orreries, Telluria and the like
Description
Patent record, including provisional and complete specification. Heading: ‘No. 7264’, Stamp of Her Majesty’s Government, ‘A.D. 1914’.
‘Date of application, 23rd March, 1914.
Complete specification left, 23rd Sept, 1914 -- Accepted, 18th Mar, 1915.’
Provisional specification: Declaration by Maud Antoinette Duthoit concerning the purpose and feature of the invention.
‘The object of the present invention is the construction of an orrery and tellurion or the like which, while suited for individual use or for class instruction, and correctly planned from a scientific standpoint, is nevertheless simple, cheap, compact and readily portable’.
The orrery or tellurium is attached to a removable pillar forming the centre about which the earth turns, which is designed to project upwards from an astronomical chart.
A complete specification gives more details of the instrument.
A fold-out illustration of the instrument is provided, dimensions 330 x 297 mm.
The Chartered Patent Agents submitting the application are: Boult, Wade & Tennant, 111 & 112, Hatton Garden, London EC.
Printed for his Majesty’s Stationery Office by Love & Malcomson, Ltd. - 1915
Shelfmark
Maker
Cambridge Instrument Co. Ltd.
Title
Resistances and bridges
Description
Descriptions and specifications are presented under these headings:-
Bridges:
Self-contained decade pattern;
Decade pattern (without galvanometer);
Precision switch decade bridge;
Precision switch decade bridge with slide wire;
Smith’s difference bridge;
Kelvin double bridge;
Conductivity bridges;
Bridges and Inductances:
Universal bridge;
Precision capacity bridge;
Standard mutual inductometer;
Carey Foster auxiliary box;
Inductances and Resistances:
Self-inductance standards;
Mutual inductance standards;
Low inductance decade resistances;
Low inductance ratio box;
Decade resistance boxes;
Resistances:
Precision decade resistance boxes;
Precision high resistance boxes;
Standard resistance;
Sub-standard resistances;
Universal shunts;
Unipivot galvanometer shunts;
Shunts for precision grade meters;
Potentiometer shunts;
Voltage ration boxes
Shelfmark
Maker
Cambridge Scientific Instruments Limited
Title
Cambridge Stereoscan Application: Semiconductors 4B
Description
Photograph of an integrated circuit. Scale accompanies photograph.
Text reads: ‘Subject: Stereoscan micrograph of an integrated circuit. Magnification x 52. The resolution and very high depth of focus should be compared with the optical micrograph of the same integrated circuit shown in Application Sheet Semiconductors 4A. Source: Specimen prepared and photographed by Cambridge Scientific Instruments Limited.’
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