US 2366795 A
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Description (OCR text may contain errors)
Jan. 9, 1945. G. R. ,LAMOREAUX 2,366,795
PROPELLER Filed Oct. 10, 1942 2 Sheets-Sheet 1 I ll/ Inventor 620g? Elam/15010.15
and flaw Z? M35 1945- G. R. LAMOREAUX 2,366,795
PROPELLER Filed Oct. 10, 1942 2 Sheets-Sheet 2 Inventar 'eoye Z? Lamar-sauna Jfi WW 1?. m
Patented Jan. 9. 1945 UNITED STATES PATENT OFFICE This'inventlon relates to new and useful improvements in propellers for aircraft and other vehicles.
The principal object of the present invention is to provide a propeller constructed in such a manner that substantially perfect static and dynamic balance can be obtained.
Other objects and advantages of the invention will become apparent to the-reader of the 7 following description.
In the drawings- Figure 1 represents a side elevational view of one form of propeller showing .the blade adjustably mounted.
Figure 2 is a fragmentary top plan view.
Figure 3 is a fragmentary enlarged sectional view on the line 3-3 of Figure 1.
Figure 4 is a front elevational view of a. modification of the invention showing fixed blades.
Figure 5 is a fragmentary top plan view of the structure shown in Figure 4. a
Figure 6 is a fragmentary detailed sectional view.
Referring to Figures 1, 2 and 3, it can be seen that numeral 5 denotes a hub structure from which radiates a plurality of'adjustable blades 6 having conventional means for adjusting the pitch of the blades, each blade having a lubricant duct 1 therethrouzh.
At the outer end of each blade 8 is a projection 8 terminating in a pintle ,9. These pintles l are disposed into bearing formations l0 located on an annulus II. The annulus II has threaded openings at the bearings III which are normal] closed by threaded plugs l2.
Obviously, the ring I I serves to prevent any tendency of the blades to work loose in the hub 5 and also defines a support for the outer ends of the blades.
, In order to achieve substantially perfect static and dynamic balance, adjustable weight members l3 are provided on the annulus ll, each being in the form of a sleeve having a suitable detent l4;-
Figures 4,. 5 and 6 disclose a modification of the'lnvention. reference character to defining a hub from which rigid blades to project and are rigidly secured at their outer ends to an annulus Ila.
On the annulus Ha are sleeve-like weight members l3a provided with suitable detent means a which can be adjusted to achieve substantially perfect static and dynamic balance.
While the foregoing specification sets forth the invention in specific terms, it is to be understood that numerous changes in the., shape, size and material may be resorted to without departing from the spirit and scope of the invention as claimed hereinafter.
Having described the invention, what is claimed as new is:
V A propeller of the character described com- GEORGE R. LAMOREAUX.