US512751A - Mikle schmaltz - Google Patents

Description

(No Model.)

M. SCHMALTZ. PROPELLER WHEEL. No. 512,751. PatentedVJaJn. 16, 1894..

NITED l STATES PATENT OFFICE'.

MIKLE scHMALTZ,foF vBAYl CITY, MICHIGAN, AssIGNoR oF ONELHALF To WILLIAM J. wANLEss, or sAMI; PLACE.

PRCPELLER-WHEEL.

SPECIFICATION forming part of Letters Patent N o. 512,751, dated Jannary 16, 1894.

Application inea July zo, 1893. serial No. 481.047. N0 model.)

To aZ Z whom t may concern.-

Be 1t known that I, MIKLE SCHMALTZ, a citizen of the United States, residing at Bay City, 1n thecounty of Bay and State of Michigan, have Invented a new and useful Propeller- Wheel, of which the following is. a specifica-y tion.

My invention relates to propellerwheels,

and has for its object to provide simple, inexpensive, and serviceable construction of parts and means for connecting the same, whereby suchparts may be adjusted with facility and locked against displacement; and, furthermore, to provide a sectional wheel capable of utlllzlng the full amount of the water through which it passes.

Further objects and advantages of this inventlon will appearin the following description ,and the novel features thereof will be particularly pointed out in the appended claims.

In the drawings: Figure 1 is an elevation of apropeller wheel embodying my'invention. Fig. 2 1s aside view of the same, partly broken away. Fig. 3 is a plan View of the hub. Fig. 4 1s a detail view, in perspective, of one of the blades.

Similar numerals of reference indicate correspondlng parts in all the figures of the drawlngs. t

1 designates the hub, the surface of which is provided with a series of spirally-arranged channels 2, which are formed in the similarlyarranged integral ribs or enlargements 3. The material between such ribs or enlargements 1s cut away to lighten the structure.

i The channels or grooves 2 are dove-tailed in cross-section to receive the dove-tailed webs 4 upon the Inner ends of the blades 5, such blades being provided at their outer ends with projections 6, to engage apertures or perforatIons 7, 1n the rim 8. To assemble the parts of the wheel they blades are fitted at their inner ends in the channels of the hub and are then dlsposed within thc rim with their termInal projections 6in registration with the apertures of the same, after which tapered wedges 9 are inserted in the channels 2, between the fioors of the latter'and the adjacent extremities of the blades, and .are driven 5o home to extend. said blades, whereby their dove-tailed surfaces are cramped snugly in the correspondingly-shaped portions of the channels and the terminal projections are locked rmly in the apertures of the rim. Such projections are then headed upon the outer surface'of the rim.

It is obvious that the fioors of the channels in the hub'are straight and do not conform to the curvature of the outer surface of the hub, and that the inner ends of the blades are straight to conform to the ioors of the challnels, whereby the bearing of the wedges or keys upon the contiguous opposing surfaces of the channels and blades is firm and even throughout. The outer terminals of the blades may be slightly convexed to conform to the curvature of the inner surface of the rim; and

in manufacturing the blades, the projections with which said outer ends are provided should vbe made slightly greater in length than the thickness of the rim to provide material for forming the heads upon the outer surface of the rim.

The facility with which the parts of the wheel may be assembled will be readily understood from the foregoing description, and in means of the construction provided an even ltension of the rim may be attained by the proper adjustment of the wedges or keys.

Various changes in thel form, proportion,

and the minor details of construction may be resorted to without departing from the prinlciple or sacrificing any* of the advantages of this invention. t

claim is#- addition thereto it should be noted that byv 1. In a propeller Wheel, the combination with the rim, of blades bearing at their outer extremities against the inner surface of the rim and provided with terminal projections extending through apertures in the same,'a hub provided with channels in which theinner ends of said blades are fitted, and means for adjusting the blades relatively to the hub,

substantially as specified.

2. In a propeller wheel,'the' combination with a rim, of a hub provided with dove-tailed channels, blades provided at their inner eX- tremities with dove-tailed'webs fitting in Said t S5 Having described the invention, what I` 1 channels, and tapered keys tted in the channels between the floors thereof and the contiguous ends of s the blades, substantially as specified.

3. In a propeller wheel, the combination of a hub provided with spirally-disposed ribs or enlargements which are partly cutaway to form channels having straight floors, blades fitting at their inner ends in said channels, a rim provided with spaced apertures or perforations, projections integral with the cuter ends of the blades fitting in said apertures or perforations and headed upon the outer surface thereof, and tapered Wedgesor keys fitting in the channels between the inner ends of the blades andthe oors of the channels. substantially as specified.

In testimony that I claim the foregoing as my own I have hereto affixed my signature in the presence of two Witnesses.

MIKLE SCHMALTZ.

"Witnesses:

DEVERE HALLL I-I. A. BENoE.

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