A bicycle Ergometer with an electric brake:
Gespeichert in:
| Hauptverfasser: | , |
|---|---|
| Format: | Buch |
| Sprache: | English |
| Veröffentlicht: |
Washington
Carnegie Inst.
1912
|
| Schriftenreihe: | Carnegie Institution of Washington publication
167 |
| Schlagworte: | |
| Online-Zugang: | Inhaltsverzeichnis |
| Beschreibung: | 44 S. |
Internformat
MARC
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| 245 | 1 | 0 | |a A bicycle Ergometer with an electric brake |c by Francis G[ano] Benedict and Walter G[uyton] Cady |
| 264 | 1 | |a Washington |b Carnegie Inst. |c 1912 | |
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Datensatz im Suchindex
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|---|---|
| adam_text | »? _//; //•
A BICYCLE ERGOME TER
WITH AN
ELECTRIC BRAKE
BY
FRANCIS G BENEDICT AND WALTER C CADY
Carnegie/3 mr^
Depositum izr
WASHINGTON, D C
PUBLISHED BY THE CARNEGIE INSTITUTION OF WASHINGTON
IGNATIUS COLLEG
_ VALKENP i - • 1
CONTENTS
PART I
Page
Introduction 3
Detailed description of the bicycle ergometer 5
General considerations regarding method of use 7
Method of calibration 9
PART II
Calibration tests 11
The technique of a calibration experiment 12
Calibration tests of Ergometer I 14
Earlier calibration tests 14
Calibration tests of 1911 15
Friction tests with Ergometer I 21
Calibration tests of Ergometer II 22
Friction tests with Ergometer II 29
PART III
The magnetic reactions produced by a copper disk rotating between the poles
of a magnet 31
Measurement of magnetic field by means of a bismuth spiral 33
Comparison of results with theory 37
Further experiments with the eddy currents 39
Influence of temperature on the constancy of the bicycle ergometer 42
The design of electric brakes 42
ILLUSTRATIONS
Page
FIG 1 Side and top views of Ergometer II 5
2 Electro-magnet and copper disk of Ergometer II 6
3 Scheme for calibration of the ergometer in a respiration chamber 13
4 Heat per revolution of Ergometer I for currents of 0 7 and 0 8 ampere
through the field 18
5 Calibration curve of Ergometer I for magnetizing current of 0 9 ampere 19
6 Calibration curve of Ergometer I for magnetizing current of 1 1 am
peres 19
7 Calibration curve of Ergometer I for magnetizing current of 1 25
iamperes 20
8 Calibration curves of Ergometer I for magnetizing current of 0 7 to 1 25
amperes 21
9 Calibration curve of Ergometer II for magnetizing current of 0 95
ampere 24
10 Calibration curve of Ergometer II for magnetizing current of 1 10
amperes 24
11 Calibration curve of Ergometer II for magnetizing current of 1 35
amperes 25
12 Calibration curve of Ergometer II for magnetizing current of 1 50
amperes 26
13 Calibration curves of Ergometer II for magnetizing current of 1 25
amperes 27
14 Calibration curves of Ergometer II for magnetizing current of 0 95 to
1 50 amperes 28
15 Magnetic induction across the air-gap 35
16 Magnetic lines and current loops on surface of rotating disk 40
iii
|
| adam_txt |
»? _//; //•
A BICYCLE ERGOME'TER
WITH AN
ELECTRIC BRAKE
BY
FRANCIS G BENEDICT AND WALTER C CADY
Carnegie/3 \ mr^
Depositum izr
WASHINGTON, D C
PUBLISHED BY THE CARNEGIE INSTITUTION OF WASHINGTON
IGNATIUS COLLEG
_ VALKENP'i - •' 1
CONTENTS
PART I
Page
Introduction 3
Detailed description of the bicycle ergometer 5
General considerations regarding method of use 7
Method of calibration 9
PART II
Calibration tests 11
The technique of a calibration experiment 12
Calibration tests of Ergometer I 14
Earlier calibration tests 14
Calibration tests of 1911 15
Friction tests with Ergometer I 21
Calibration tests of Ergometer II 22
Friction tests with Ergometer II 29
PART III
The magnetic reactions produced by a copper disk rotating between the poles
of a magnet 31
Measurement of magnetic field by means of a bismuth spiral 33
Comparison of results with theory 37
Further experiments with the eddy currents 39
Influence of temperature on the constancy of the bicycle ergometer 42
The design of electric brakes 42
ILLUSTRATIONS
Page
FIG 1 Side and top views of Ergometer II 5
2 Electro-magnet and copper disk of Ergometer II 6
3 Scheme for calibration of the ergometer in a respiration chamber 13
4 Heat per revolution of Ergometer I for currents of 0 7 and 0 8 ampere
through the field 18
5 Calibration curve of Ergometer I for magnetizing current of 0 9 ampere 19
6 Calibration curve of Ergometer I for magnetizing current of 1 1 am
peres 19
7 Calibration curve of Ergometer I for magnetizing current of 1 25
iamperes 20
8 Calibration curves of Ergometer I for magnetizing current of 0 7 to 1 25
amperes 21
9 Calibration curve of Ergometer II for magnetizing current of 0 95
ampere 24
10 Calibration curve of Ergometer II for magnetizing current of 1 10
amperes 24
11 Calibration curve of Ergometer II for magnetizing current of 1 35
amperes 25
12 Calibration curve of Ergometer II for magnetizing current of 1 50
amperes 26
13 Calibration curves of Ergometer II for magnetizing current of 1 25
amperes 27
14 Calibration curves of Ergometer II for magnetizing current of 0 95 to
1 50 amperes 28
15 Magnetic induction across the air-gap 35
16 Magnetic lines and current loops on surface of rotating disk 40
iii |
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| illustrated | Not Illustrated |
| index_date | 2024-07-02T15:27:14Z |
| indexdate | 2024-07-09T20:42:47Z |
| institution | BVB |
| language | English |
| oai_aleph_id | oai:aleph.bib-bvb.de:BVB01-014947095 |
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| physical | 44 S. |
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| publishDate | 1912 |
| publishDateSearch | 1912 |
| publishDateSort | 1912 |
| publisher | Carnegie Inst. |
| record_format | marc |
| series | Carnegie Institution of Washington publication |
| series2 | Carnegie Institution of Washington publication |
| spelling | Benedict, Francis Gano 1870-1957 Verfasser (DE-588)116119977 aut A bicycle Ergometer with an electric brake by Francis G[ano] Benedict and Walter G[uyton] Cady Washington Carnegie Inst. 1912 44 S. txt rdacontent n rdamedia nc rdacarrier Carnegie Institution of Washington publication 167 Dynamomètres ram Dynamometer Cady, Walter G. 1874-1974 Verfasser (DE-588)117668230 aut Carnegie Institution of Washington publication 167 (DE-604)BV035415500 167 HEBIS Datenaustausch application/pdf http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=014947095&sequence=000001&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA Inhaltsverzeichnis |
| spellingShingle | Benedict, Francis Gano 1870-1957 Cady, Walter G. 1874-1974 A bicycle Ergometer with an electric brake Carnegie Institution of Washington publication Dynamomètres ram Dynamometer |
| title | A bicycle Ergometer with an electric brake |
| title_auth | A bicycle Ergometer with an electric brake |
| title_exact_search | A bicycle Ergometer with an electric brake |
| title_exact_search_txtP | A bicycle Ergometer with an electric brake |
| title_full | A bicycle Ergometer with an electric brake by Francis G[ano] Benedict and Walter G[uyton] Cady |
| title_fullStr | A bicycle Ergometer with an electric brake by Francis G[ano] Benedict and Walter G[uyton] Cady |
| title_full_unstemmed | A bicycle Ergometer with an electric brake by Francis G[ano] Benedict and Walter G[uyton] Cady |
| title_short | A bicycle Ergometer with an electric brake |
| title_sort | a bicycle ergometer with an electric brake |
| topic | Dynamomètres ram Dynamometer |
| topic_facet | Dynamomètres Dynamometer |
| url | http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=014947095&sequence=000001&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA |
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