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US1004754A
|
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Safety mechanism for power-operated doors.
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US937870A
|
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Door-operating mechanism.
|
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US954592A
|
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Combined street-car pneumatic door device and brake-release mechanism.
|
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US913773A
|
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Safety locking device for doors or other closures.
|
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US913853A
|
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Pneumatic operating mechanism for doors or other devices.
|
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US931224A
|
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Elevator car and well door operating mechanism.
|
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US916607A
|
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Flush elevator-hatchway
|
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US870051A
|
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Car-door and step operating mechanism.
|
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US886870A
|
|
Electromagnet.
|
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US857232A
|
|
Door-operating apparatus.
|
|
US886869A
|
|
Electromagnet.
|
|
US778073A
|
|
Elevator hoisting mechanism.
|
|
US700375A
|
|
Elevator-door-operating mechanism.
|
|
US693908A
|
|
Controlling mechanism for elevator-hoisting motors.
|
|
US724951A
|
|
Automatic electric elevator.
|
|
US693907A
|
|
Safety device for elevators.
|
|
US715299A
|
|
Electric elevator.
|
|
US732377A
|
|
Electrical motor.
|
|
US638282A
|
|
Automatic electric elevator.
|
|
US638281A
|
|
Automatic electric elevator.
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