Patent GB-1916-125473

• From google patents abstract: "Steering and balancing.-A control device for aircraft comprises means for balancing wholly or in part the air pressure on a control surface pivoted in front of its centre of pressure, the device being also adapted to hold the control surface resiliently in the position that it occupies at the moment when the pilot takes his hand from the control lever"
• Tech class: CPC B64C17/00: Aircraft stabilisation not otherwise provided for
• Inventor location: Hargreaves: Engineer, of Park Cottage, Blake Hall Road, Wanstead, Essex

Patent signed by some others aside from inventor Hargreaves: R. Blackburn, Stuart A. Hirst (Director), and B. A. Waller (Secretary)

Sources

• Original patent document and bibliography entry on espacenet
• on google patents

Year filed	1916
Year granted	1919
Office	GB
Patent number	125473
Inventors	Frederick James Hargreaves
Inventor country	GB
Applicant person	Frederick James Hargreaves
Applicant firm	Blackburn Aeroplane and Motor Co.
Applicant type	COMPANY
Applicant is inventor?	0
Original title	Improvements in or relating to Controlling Mechanism for Aerial Machines
English title	Improvements in or relating to Controlling Mechanism for Aerial Machines
Tech fields	control
Filing date	1916-08-21
Full specification filed date	1917-02-17
Application number	1181516
Grant date	1919-04-24
Granted?	1
Publication date
Supplementary to patent
Related to aircraft?	1
Serial number
Patent agent	None
Assigned to
National tech categories
IPCs	IPC B64C1/00, IPC B64C17/00
CPCs	CPC B64C17/00, CPC B64C2700/6218
Family year	1916
First filing?	1
Cites these patents
Citations from after 1930	0
Application ID	21623649
INPADOC family ID	23417545
Number of text pages	6
Number of diagram pages	2
Number of figures	7
Number of claims	9