Supplemental Oath for Hydraulic Control System
Date
1954
Type
Patent document
Author
Henry George Ferguson; John M. Chambers; William John Sands
Recipient
United States Patent Office
Archive reference
supplemental-oath-of-henry-george-ferguson---copy.pdf
Category
Patents & Technical Records
Source class
Primary source
Summary
A 1954 supplemental patent oath naming William John Sands, Harry Ferguson and John M. Chambers as applicants for a hydraulic control system.
Historical context
The application was filed on 3 March 1948 and recorded as allowed on 12 February 1954. The applicants declare that the amended claims formed part of their invention and pre-dated the original application. The surviving copy leaves the individual execution dates and notarial certifications blank.
Archive note
The date lines and notarial certifications in this surviving copy are blank. The catalogue therefore records the document year as approximately 1954.
People mentioned
Places mentioned
Organisations mentioned
Subjects and topics
Tags
Catalogue description
A supplemental oath in U.S. patent application Serial No. 12,884, Division 1, for a hydraulic control system, naming Henry George Ferguson, John M. Chambers and William John Sands as applicants.
Reviewed transcript
IN THE UNITED STATES PATENT OFFICE In re application of Henry George Ferguson (Harry G. Ferguson), John M. Chambers and William John Sands l Serial No. 12,884 Division 1 Filed March 3, 1948 For: HYDRAULIC CONTROL SYSTEM Allowed: February 12, 1954 ) SUPPLEMENTAL OATH HENRY GEORGE FERGUSON, otherwise known as HARRY G. FERGUSON and HARRY FERGUSON, JOHN M. CHAMBERS and WILLIAM JOHN SANDS, the applicants in the above entitled application, which contains the following claims: 1. (18) A hydraulic control system for an agricultural tractor or the like which comprises the combination of a fluid-operable actuating or load- sustaining device for a soil-engaging or agricultural implement which is to be controlled, valve means movable progressively to admit fluid to or release it from said device at a rate proportioned to the degree of movement thereof to correctively restore said implement to a predetermined depth or draft, and a source of pressurized fluid for actuating said load-sustaining device which includes a container for pressure fluid, a continuously driven pump, connections between said container, the discharge side of said pump and said valve means for supplying fluid from said pump to said container and said device simultaneously, or for supplying pressure fluid to the device from the container and pump simultaneously, and control means on the admission side of the pump responsive to the pressure of the fluid in said container to put the pump automatically into or out of effective operation to maintain the fluid at a predetermined pressure in said container. 2. (19) In a hydraulic system for effecting an accurately proportioned response to displacement of a control member, the combination of a continuously driven pump, a single acting hydraulic actuator operable against a load by fluid supplied from said pump, a first control valve interposed between said actuator and the discharge of said pump, said valve having relatively slidable plunger and housing elements with a port in the latter connected to said actuator, said elements being operatively associated with the displaceable control member and relatively slidable thereby from a neutral position, in which said plunger substantially blocks said port, in opposite directions from such neutral position to open said port respectively to the discharge of said pump and to drain and with a progressive opening of said port in each direction, a second control valve arranged to open and close the intake of said pump, said second control valve being spring biased to open position, and a fluid pressure operated member connected so as to be continuously subjected to fluid at the pressure prevailing at the discharge side of said pump and mechanically connected to said second control valve to close the latter against the influence of its spring bias in response to the establishment of a predetermined pressure head at the discharge side of the pump irrespective of the position of the first control valve. 3. (20) A system as set forth in claim 1, in which means is provided for supplying fluid out of the system to an auxiliary actuator or the like from a point intermediate said valve means and the discharge of said pump. 4. (21) In a hydraulic control system for a tractor having a trailing implement hitch, a single acting hydraulic actuator for raising and lowering the hitch with an implement attached thereto and a control member displaceable in proportion to the draft load on the hitch, the combination of a continuously driven pump connected for supplying fluid under pressure to the actuator, a first control valve interposed between said actuator and the discharge of said pump, said valve having relatively slidable plunger and housing elements with a port in the latter connected to said actuator, said elements being operatively associated with the displaceable control member and relatively slidable thereby from a neutral position, in which said plunger substantially blocks said port, in opposite directions from such neutral position to open said port respectively to the discharge of said pump and to drain and with a progressive opening of said port in each direction, a second control valve arranged to open and close the intake of said pump, said second control valve being spring biased to open position, and a fluid pressure operated member connected so as to be continuously subjected to fluid at the pressure prevailing at the discharge side of said pump and mechanically connected to said second control valve to close the latter against the influence of its spring bias in response to the establishment of a predetermined pressure head at the discharge side of the pump irrespective of the position of the first control valve. Being duly sworn, depose and say that the subject matter set forth in the specification as amended and defined in the foregoing claims was part of their invention, was invented before they filed their original application above-identified for such invention; that they do not know and do not believe that the same was ever known or used before their invention or discovery thereof, or patented or described in a printed publication in any country before their invention or discovery thereof, or more than one year before said application, was not patented in a foreign country on an application filed by themselves or their legal representatives or assigns more than twelve months before said application, was not in public use or on sale in this country for more than one year before the filing date of said application and has not been abandoned. (otherwise known as Harry G. Ferguson and Harry Ferguson) Abbotswood, Stow-on-the-Wold Gloucestershire, England. , , \ \ " - 4 - Tudor Cottage, Blackdown Hill, Leamington Spa, Warwickshire, England. Myrtlefield, Old Hillsborough Road, Lisburn. County Down, Northern Ireland. Before me personally appeared Henry George Ferguson, otherwise known as Harry G. Ferguson and Harry Ferguson, to me known to be one of the persons described in the above supplemental oath, who signed the foregoing instrument in my presence, and made oath be~ore me to the allegations set ~orth therein as being under oath, this day of , 1954. Notary Public My commission expires ~ ss. City of Coventry County of Warwick, England) Before me personally appeared John M. Chambers, to me known to be one of the persons described in the above supplemental oath, who signed the foregoing instrument in my presence, and made oath before me to the allegations set forth therein as being under oath, this day o~ --------------------' 1954. Notary Public i1'lY cornmi ss ion expires .r' - 5 - City of County of l ss. Before me personally appeared William John Sands, to me known to be one of the persons described in the above supplemental oath, who signed the foregoing instrument in my presence, and made oath before me to the allegations set forth therein. as being under oath, this day of --------------------' 1954. Notary Public ~.~y commission expires_ _ __
Related archive records
Cite this record
William J. Sands Family Archive, “Henry George Ferguson; John M. Chambers; William John Sands to United States Patent Office”, 1954, supplemental-oath-of-henry-george-ferguson---copy.pdf.