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US1908728A
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Electromagnet
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GB191505007A
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Spring Arrangement, especially for use in Electric Making and Breaking Devices.
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CA412604A
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Temperature regulating device
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CA557029A
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Counting mechanism for an electricity meter
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CA401364A
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Electricity prepayment meter
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CA360655A
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Small synchronous motor
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CA552724A
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Electromagnetic remote control receiving apparatus
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CA547601A
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Multiple tariff counting mechanism for electricity meters
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CA261782A
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Electricity current measure
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CA523478A
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Device for measuring losses from heating installations
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CA399883A
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Synchronous motor
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CA583178A
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Multiple tariff counter for electrical measuring apparatus
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CA411009A
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Remote control system
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CA546933A
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Mechanical integrating apparatus
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CA549361A
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Maximum consumption meter
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CA423669A
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Ferraris meter magnet core
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CA552723A
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Electromagnetic remote control receiving apparatus
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CA601802A
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Apparatus for measuring the loss of heat in heating installations
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CA547602A
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Idling mechanism, particularly for measuring and counting machines
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