US873455A - Mortar-mixer. - Google Patents

Description

PATENTED DEC. 10, 1907.

.G. E. OBLMAN.

MORTAR MIXER. APPLICATION FILED JULY 10. 1907.

UNVENTORI WITNESSES:

R & fig mm UNITED STATES PATENT OFFICE.

OURT E. OELMAN, or DETROIT, MICHIGAN.

MORTAR-MIXER;

Specification of Letters Patent. Application filed Jul 10.1907. Serial No. 382.982.

To fillv whom it may concern:

. Be it known that I, CURT E. OELMAN, a citizen of the United States of America, residing at Detroit, in the county of Wayne and State of Michigan, have invented certain new and useful Improvements in Mortararatus rigidly-while running as t e wheel use is restricted to keep it within the customary limits for ordinary road use.

This lnvention relates to a mixer of the type described wherein thorough and efficient commingling of thematerial used is ob- .;tained in a limited s ace, the parts being so disposed and engaged as to give stability and steadiness to the machine without affecting its portability.

The invention consists in the matters hereinafter described, and more particularly set forth in the appended claims. In the drawings, Figure 1 is a view in erspectiveof a machine embodying the catures of the invention. Fig. 2 is a transverse section through the forward end of the machine parts being in elevation. v ews-in detail of a conveyer arm. Fig. 4 are views in detail of am'ixing blade. Fig.

'35 5 is a vertical central longitudinal section through the rear end of the machine.

Referring to the drawings, the body of the machine consists of a horizontal r trough 1 of sheet metal closed at both ends. Its, forward discharge end is su ported by a cradlev consisting of oppositely disposed metal brackets 2 whose upper divergent arms. are. concave to correspond to the shell of the trough to which they are riveted, and

4,5 whose lower, per endiculai'. parallel ends are severally securc( by bolts 3 ofr'the like, to parallel ribs 4 on the upper face of a horizontal disk 5 The latter is rotatably secured by an annular'rabbeted flange 6 on a circular bolster plate 7 having de ending bearing blocks 8 integrally formed t ereon, in which a forward wheelaxle 9 'is rotatably secured by suitable caps 10 bolted tachably secured thereon. A

suitably secured to the bolster plate. The

regror hopper end of'the trough is mounted:

squared between the bearings an withdrawn through a suitable. aperture 30 in Fig. 3 are U-shaped or otherwise de-" tongue 11 is Patented Dec. 10,1901,

on a ribbed and flanged metal drop frame 12 whose upper portion 13' is u-sh'aped. to conform to and closely supportthe trough to which it is secured by rivets or bolts. The

depending portion forms a pedestal 15 with divergent legs whose flangedends rest on and are secured to a horizontal, rearwardly-extending engine platform 16 by bolts 17 and angle braces 14.

The platform has integral, marginal flanges 18 in which alined axle studs-19 are secured- I for the rear wheels 20.

. A. hopper 21 whose flared sides 22 are each riveted or bolted to the angle iron 23 which forms the flange rim of the trough, ermits;

material to be thrown into the bo y from either side, near the rear end thereof,

A segmental door 24 is hung on suitable hinges 25 to the front of the troughand is locked by a latch 26.

A shaft 27 is rotatably secured inalinement withthe axis of curvature of thetrough, by

an overhanging bracket 28 bolted on the front end of the trough and by a bearing 29 on the rear end. The shaft is pol 'g'onal or may be .the' front b removing thebearing bracket 28. The s aft extends through the rear bearing and a gear 32 is keyed or otherwise secured thereon.

An engine 33', of any, approved type, is mounted-on the. platform 16,,and its drive gear 34 is operatively connected to.the shaft gear through an intermediate pinion 3 ,5, which is journaled on a .stud carried by a slide I block 36 secured b bolts engaging horizontal guide slots 37 int e pedestal 15 in the drop frame. This permits change and adjustment .of the pinion for obtaining'different speeds.

A number of conveyer arms 38 are secured on the shaft in helical order beneath the hopper. These arms each consist of a socket 39 adapted to slip onto the'shaft, a short shank 40 and a blade 41 integral therewith, setobliquely to the axis, turned to form a flange 42. These arms extend past the hopper and are of sufficientpitch to move material received therefrom quite ra idly toward the middle portion of the trough, with suflicient stirring and rotary motion to with the rear margin upf thoroughly mix' the mass, which is usually'in adr state. J p 1 The remainder of the shaft beyond the hopper carries mixing blades 43. These each consist of a hollow socket 44, adapted to engage the shaft. and a broad, segmental blade 45, set obliquely thereon, whose forward edge has a marginal flange 46, extending quite the length of the blade, while the segmental margin and end of the flange very closely approach and sweep the surface of the trough. These mixing blades have considerably less rake or pitch than the arms and do not advance the material so rapidly along the trough, but turn it over and over with a grinding, rubbing motion against the side of the trough, which insures smoothness and thorough mixture or blending of'the ingredients.

A water pipe 47 connected to any available source of supply, is horizontally secured centrally over the middle portion of the trough and is adapted to spray the contents of the trough when first encountering the mixing blades;

One of the features of the invention is the arrangement of the convever flight, whereby the material, as received om the ho per, is carried quite rapidly along the troug 1, with sufficient rotary motion to thoroughly mix the mass, while dry, and then, while water is being added, is retarded and turned over and over, to thoroughly saturate it before it passes I beyond the water supply, and to rub it smooth,

so that any coarse particles are disintegrated and the resultant mixture is homogeneous. This action of the blades especially adapts the machine for mixing mortar and that is its principal purpose, as the mortar is thoroughly distributed uniformly throughout the mass.

Another feature is the distribution of the load on the Wheels, so that the vibrations of the engine are communicated directly to the rear wheels at a point below the center of gravity of the machine, thereby diminishing the tendency to'oscillations.

Another feature is the use of the broad horizontal bearing for the front Wheels,

whereby the usual king bolt is eliminated,

and the lateral strain carried at the circumference of the bolster plate, thereby transmit ting the load as directly as possible to the wheels.

What I claim as-my invention is 1. A mixer comprising a horizontal U- shaped trough provided with a hopper delivering centrally into the trough from either side, near one end thereof, and at the other end with a discharge door, a wheeled bolster and cradle supporting the discharge end of the trough, a horizontally slotted dropframe carryin the hopper end of the trough, having a whee ed platform, a mixer and con J veyer in the trough, a motor on the platform, and a gear train connecting the con veyer and motor having an intermediate pinion, a bearing block on which the pinion 1s journaled, adjustably secured by bolts in slots of the drop frame;

2. A mixer comprising a horizontal U- shaped trough, supported by bearing wheels, a hopper over one end, a discharge door at. the other end, a water spray pipe discharging centrally over an intermediate portion of the trough, a conveyer and. mixer consisting of a shaft journaled at each. end in the trough, squared between its bearings, syumnetrieally disposed conveyer arms detachably secured on the portion of the shaft below the hopper, each consisting of a socket adapted to slide on the shaft, a shank and a segmental blade thereon oblique to the shaft provided with a marginal flange on its back edge, mixing blades symmetrically disposed on the remainder of the shaft, each consisting of a socket adapted to slip onto the shaft and a radial segmental blade thereon having less rake than. the conveyor arm blade, provided with a marginal flange on its forward edge, a

motor secured at the hopper end of the trough and a gear train operatively connect;- ing t ie motor and shaft;

3. A mixer comprising a U-shaped sheet metal trough, a hopper on the rear end of the trough adapted to deliver centrally thereto from either side for a portion of its length, a discharge door in the forward end, a shaft bearing secured on the rear end of the trough, an overhanging. bearing bracket secured on the front end of the trough, a shaft having a polygonal body extending throu h the front end, journaled in the bracket an in the rear end bearing, symmetrically disposed oblique flanged conveyer arms detachably secured on the portion of the shaft below and adjacent to the hopper, oblique mixing blades having form whose drive shaft is in parallel alinement with the conveyer shaft, a gear secured to the conveyer shaft outside the rear hearing, a gear secured to the motor drive shaft,' an intermediate change pinion meshin .with said gears, a stud block carrying said pinion, .adjustably secured by bolts passing throu h horizontal slots in the pedestal, and

a cradle supporting the forward end of the trough, swiveled horizontally on a bolster late, and bearing wheels supporting the olster.

4. In a mixer having a U-shaped trough supported on bearing wheels and provided with a hopper delivering into one end and a discharge door at the other, a shaft having a polygonal body journaled at either end on the trough ends in axial coincidence with the axis of curvature of the trough, conveyor arms symmetrically disposed in helical relation on the shaft below the hopper, each con sisting of a hollow socket adapted. to slip onto the shaft body, a shank inte ral there. with and a short, broad segmenta blade integral with the'shank, oblique to the axis of flange on the forward edge of the blade' lying rotation,-= provided with a short. marginal in a plane parallel'to the shaft axis,the' seg .flange'on its rear edge, turned toward the dis-. mental margin and adjacent end-margin of char '0. door, and combined mixing and grind the flange being adapted to closely aiproach 15 5 ,i b ades detachably'seeured'in symmetrical, and sweep the must face of 'the-tr'ou shaft -bod each consisting of a hollow in presence of two witnesses.

socket em racing-thefshaft, a segmental OURT OELMAN.

blade integrally oined thereto at an angle Witnesses; 10 oblique to the axis ofrotation, of less degree 0. YR. STIQKNEY,

he ieal relation along the remainder of the 'In testlmony whereof I affix my s1gnature.-'

than the angle of the arms, and a marginal OTTO F; BARTHEL

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