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W. J. A. LONDON & B, C. ALLEN. TURBINE. APPLICATION HLED SEPT. 19, I912.

192295490»

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v Patented June 12, 1917.

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WITNESSES

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WILLIAM J. A. LONDON AND ROBERT C. ALLEN, 0F HARTFORD, CONNECTICUT, ASSIGN ORS TO THE TERRY STEAM TURBINE COMPANY, OF HARTFORD, CONNECTICUT, A CORPORATION OF CONNECTICUT. TURBINE.

Speci?cation of Letters Patent.

1,229,d90.

Application ?led September 19, 1912.

Z 0 all whom it may concern:

I’atented June 12, 1917.

Serial No. 721,126.

or upper ends of the several blades are ?tted

Be it known that we, W. J. A. LONDON, a into a shroud in any usual or convenient 50

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subject of the King of England, and resident of Hartford and State of Connecticut, and whose post-o?ice address is Hartford, Con— necticut, and ROBERT C. ALLEN, a citizen of the United States, and resident of Hartford and State of Connecticut, and whose post o?ice address is Hartford, Connecticut, have invented new and useful Improvements in Turbines, of which the following is a speci ?cation. This invention relates particularly to the

manner. The construction here described is

extremely simple and provides a very secure

and rigid fastening for the blade. IVe claim as our invention:

1. In a blade fastening device the combi 55 nation with a rotor having transverse slots in its periphery, of a blade having a root of

irregular cross section adapted to ?t into said slot, and a ?ller adapted in shape to ?t in said slot at one side of the root.

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2. In a device of the character described, fastening of the blades or vanes in the rotor the combination with a rotorhaving trans 15 and has for its object to provide a simple, in verse slots in its periphery, of a blade pro expensive and secure means for accomplish vided with a root of reduced size and of ir ing this purpose. regular cross section, a ?ller adapted in 65 shape to ?t the irregular side of said root Referring to the drawings: Figure 1 is a perspective view of the rotor and with the root to closely ?ll the slots in 20 made in accordance with our invention. the rotor, said blade overlying said ?ller. Fig. 2 is a cross sectional View of the 3. In a device of the character described, blade. the vcombination with a rotor having trans 70 Fig. 3 is a cross sectional view of the root verse slots in its periphery, of a blade and means for fastening said blade to said rotor of the blade. 25 Fig. 4: is a cross sectional view of the pack comprising a blade root and a ?ller having

ing ?ller. Fig. 5 is a view looking on the end of a 30

blade positioned in the rotor. Referring to the drawings a denotes the body of the rotor the periphery of which is transversally slotted at regular intervals, as indicated at 6, holes being drilled as incli cated at c to form an enlargement at the bottom of each slot. 10 denotes the blade or

correspondingly shaped contacting faces and adapted to fit snugly in the slots.

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4. In a turbine a rotor having its periph~

ery transversely slotted, blades overlying said slots and seated against the face of the rotor, each blade provided with a root ?t ting said slot, and means for bending the end

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of said root when the blade is driven into

position, to lock the blade in place.

5. In a turbine a rotor having transverse vane. 11, the root of the blade; and 12, a ?ller one side of which is shaped to ?t the peripheral slots the walls of which are in root of the blade, the other side being ?at clined at the bottom, blades overlying said 85 to ?t against one wall of the slot in the ro~ slots and seated against the face of the rotor, ‘ tor. The ?ller is placed against the root of each blade being provided with a root adapt~ 40 the blade and then both are inserted in a slot ed to ?t within the slots and be deflected by

in the rotor and driven down until the over

the said incline when the blade is seated, and v

hanging portion of the blade is set ?rmly a relatively shorter ?ller located in each slot against the edge of the rotor. The length of back of the roots. 6. A blade for turbine rotors comprising a the root is slightly greater than the depth of the slotwith the result that when the blade main body portion and a root provided with is driven down into position the lower end a flat front face and an irregular rear face.

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7. In a turbine a' rotor having transverse 95 of the root is bent at an angle to its main portion, forming a secured lock. The outer peripheral ' slots inclined at the bottom,

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1,229,490

blades overlying said slots, and seated blade is properly seated, to lock the blade in against the face of therotoi', a'root formed position.’ ' integrally with the blade, a filler block ?t-

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ting against said root, said ?ller block and

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root ?lling said slots and said root being rel—

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atively longer than, said ?ller block and adapted to contact with and be de?ected by the inclined Wall of said slots when said

Witnesses: I

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GEORGE R. TRIPP, ' 1 G. H. PLAINE. ‘

Copies of this patent may be obtained for five cents each, by addressing the “Commissioner of Patents; Washington, D. G.”

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