| 54 |
Title |
TI |
[EN] Improvements in Balances and Balance Springs for Watch, Clock, and like Escapements. |
| 71/73 |
Applicant/owner |
PA |
PERRET PAUL, CH
|
| 72 |
Inventor |
IN |
PERRET PAUL, CH
|
| 22/96 |
Application date |
AD |
Oct 29, 1897 |
| 21 |
Application number |
AN |
|
|
Country of application |
AC |
GB |
|
Publication date |
PUB |
Feb 5, 1898 |
33
31
32 |
Priority data |
PRC
PRN
PRD |
CH
null
18970506
|
| 51 |
IPC main class |
ICM |
|
| 51 |
IPC secondary class |
ICS |
|
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IPC additional class |
ICA |
|
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IPC index class |
ICI |
|
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Cooperative patent classification |
CPC |
|
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MCD main class |
MCM |
|
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MCD secondary class |
MCS |
|
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MCD additional class |
MCA |
|
| 57 |
Abstract |
AB |
[EN] 25,142. Perret, P. May 6, [date claimed under Sec. 103 of Patents &c. Act, A.D. 1883]. Balances; balance springs.-The balance spring is made of an alloy the elasticity of which increases with a rise in temperature. Such an alloy is made of nickel and steel in the proportions of 27 or 28 of the former and 73 or 72 of the latter. A balance which only expands slightly is composed of 35 to 36 parts of nickel and 65 to 64 parts of steel. |
| 56 |
Cited documents identified in the search |
CT |
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| 56 |
Cited documents indicated by the applicant |
CT |
|
| 56 |
Cited non-patent literature identified in the search |
CTNP |
|
| 56 |
Cited non-patent literature indicated by the applicant |
CTNP |
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Citing documents |
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Determine documents
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Sequence listings |
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Search file IPC |
ICP |
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