US1098400A - Portable mortar-mixer. - Google Patents

Description

M. D. PRATT.

PORTABLE MORTAR MIXER.

APPLICATION FILED JULY 9, 1910.

1,098,400; Patented June 2, 1914.

ESM

Wm V Illy I i g I l n i i ITU ccLUMmA PLANOGRAPH ca .,wAsHlNn-rO-N. n. C.

M. D. PRATT.

PORTABLE MORTAR MIXER.

APPLICATION FILED JULY 9, 1910.

Patented June 2, 1914.

2 SHEETS-SHEET 2.

a n. N. o T w m 9 .A w u c M P A R a o N A L p M u M w o c rrnn srarnns rgrnnr marion.

MASON I). PRATT, 0F HARRISBURG, ".EENNSYLVANIA.

PORTABLE IVIORTAR-MIXER.

To all 'whom it may concern Be it known that l, Mason D. PRATT, a citizen of the United States, and resident. of Harrisburg, county of Dauphin, State of Pennsylvania, have invented certain new and useful Improvements in Portable Mortar- Mixers, of which the following is a specilication.

The objects of this invention are to produce a convenient apparatus for mixing and transporting concrete, mortar, or o-ther substances, and more particularly to produce an apparatus by means of which the ingredients of cement mortar may be mixed while in transit to the place where the mortarl is required and discharged from the mixer at a plurality of points, as may be necessary in building walls, casting cement pipe, or producing other elongated structures.

The invention will be described in connection with the accompanying drawing, in which,-

Figure 1 is a side view partly in section of an apparatus embodying my invention; Fig. 2 is a plan of the valve controlling tho outlets; Fig. 3 is an end view of the apparatus; Fig. 4 is a detail.

ltet'erring to the drawings, l() indicates a beam which may be suspended from a derrick or elevated carrier by means of a suit able connection 11 attached at or near the middle of the beam. The receptacle 12 which constitutes the mixer is preferably cylindrical and closed at its ends by suitable plates 13. This cylindrical receptacle is mounted in two rings lil suspended from the beam 1() by rods or links 15, as shown for instance in Fig. 3. The rings preferably have openings at their lower sides, their separated ends being adjustably connected by means of bolts 16. Each ring consists of two annular plates between which the bolts 1G are mounted. Between these plates are also mounted a series of grcoved wheels 17 in which the receptacle 12 turns. The receptacle is preferably provided with annular rails 18 which rest in the grooves of the wheels 17. By means of the bolts 16 the rings 14 may be adjusted so that the receptacle 12 will turn freely in them, but without lost motion. The rings 14 are necessarily of considerably greater radius than the receptacle 12, which would interfere with bringing the receptacle close to a mold, but by breaking away the lower parts of the rings Specicaton of Letters Patent.

Application filed July 9, 1910.

Patented June 2, 1914.

serial No. 571,244.

and introducing the bolts 16 the bottom of the receptacle can be brought much closer to a mold or trench in to which the mortar or concrete is to be discharged. The bolts furthermore interfere in a less degree with the outlet openings, to be hereinafter described, than would the rings if carried across the bottom of the mixer.

In Figs. 1 and 3 the rotary receptacle 12 is shown in the position in which it is adapted to be charged and discharged and for the purposes of this specification this may be assumed to be its normal position. Upon the upper side of the receptacle are a series of openings 19 provided with covers 2O and with bolts or screws :tor securely fastening the covers in place to close the openings and prevent leakage when the receptacle is rotated. As shown in Fig. 4, the cover 20' is provided with an eye 21 at one side for one of the bolts and with a hooi; 22 at the opposite side for another bolt. By loosening the bolts the cover may be swung about the eye 21 without disconnecting it from the receptacle.

At the bottom of the receptacle are a series of openings 23, preferably arranged in a single straight line parallel with the axis of the cylinder and a sliding rod 24 having a corresponding series of openings is connected with the outer surface of the receptacle and adapted to sinniltaneously open or close the discharge openings 23. As shown the valve rod 24 is mounted in stirrups 25 which are suitably attached to the exterior of the cylinder and which hold the valve rod snugly against the wall of the cylinder, as shown in Fig. l. The valve rod 24g may be operated in any suitable way; as shown it is adapted to be reciprocated by means of a lever 27 pivoted on one end of the receptacle and having an arm engaging the rod. lf desired a second lever 28 may be mounted on the other end of the receptacle and also connected with the valve rod in any suitable manner.

@n the inner wall of the receptacle 12 are securely attached a series of inwardly projecting plat/es or paddles 29, preferably arranged in circumferential rows, the paddles of each row being inclined in opposite directions.` whereby the materials are moved backward and forward lengthwise of the receptacle when the latter is rotated, and thus thor-- oughly mixed.

I provide suitable means for rotating the mixer either while it is stationary or during transit from one point to the other. As illustrated in the drawing, an electric mot-or 30 is mounted on a platform 31 and connected by suitable gearing with a sprocket. wheel 32 upon a. shaft 33 which is mounted in bearings on the platform or upon the beam 10. A suitable sprocket chain 34; connects the sprocket wheel 32 with a toothed ring 35 secured on the receptacle 12. The rotary movement of the mixer l2 may therefore be controlled by controlling the movements of the motor in the usual manner.

In operating the mixer, the water, cement, sand and gravel or other ingredients may be introduced dry and the required amount of water then injected. The mixer is designed to be closed tightly when in operation to prevent leakage of water or other materials. To preventthe formation of a vacuum when discharging the contents, and to thereby promote a free discharge, I provide an air inlet, which is preferably controlled by the valve plate 24. As shown there is an air pipe 36 extending across the mixer chamber and having one end screwed into one of the outlet openings 23 and adapted to be opened and closed by the valve plate 24. The opposite end of the pipe 36 is in communication with the interior of the mixer and is sustained by a suitable bracket 37. As shown the air inlet pipe extends diametrically across the mixer, its o pen end being near the upper wall of the mixer when the outlet openings 23 are at the bottom.

I provide handles 3S centrally arranged on the ends of the mixer receptacle as a convenient means for the workmen to guide the mixer and aline its discharge openings with the mold to be filled. In order that the mixer may be handled while the receptacle is rotating, these handles are preferably arranged to turn freely upon studs 39 connected with the end plates. Then the proper amounts of the various ingredients have been introduced the rot-ation of the mixer may be started and may be continued while it is being transported from the charging location to the place where the mortar or concrete is to be deposited. In this way no time is lost in transferring the material. It will be understood that the various closures for the mixer receptacle are to be water tight so that thin mortar can be mixed if desired. The present apparatus is particularly intended for the mixing of thin cement mortar, although of course it is adapted for various other mixtures.

Having described my invention what I claim and desire to secure by Letters-Patent is,

l. A portable mortar mixer comprising a suitable beam and means for suspending the same, rings supported from the beam, a mixing receptacle Arotatably mounted in said rings, a motor supported upon the beam and means connecting the motor with the receptacle to rotate the latter.

2. A rotary mixer comprising an over head support, a plurality of rings depending from said support, wheels carried by said rings, a receptacle provided with annular tracks engaging said wheels, and means whereby said rings may be expanded or contracted.

3. A rotary mixer comprising an overhead support, a plurality of rings depending from said support, wheels carried by said rings, and a receptacle provided with annular tracks engaging said wheels, said rings being open at one side and having their adjacent ends adjustably connected by suit-able means.

4. A concrete mixer comprising a rotary receptacle, an air inlet pipe within the receptacle and having one end communicating with the outside air at one side of said receptacle and the other end arranged near the inner wall of the receptacle at. the other side thereof, for the purpose set forth.

5. A concrete mixer comprising a rotatable receptacle having a discharge opening and an inlet opening, and a common valve controlling both of said openings, whereby air is admitted to the mixer when the discharge valve is opened.

6. In a portable mortar mixer, the combination of a portable supporting beam, a rotatable mixing receptacle, pairs of members suspended from the beam and curved around the receptacle, rails on the mixing receptacle, rollers disposed between the curved members and rails, said rollers rotatably supporting said receptacle, a motor mounted on said beam, and means connecting the motor with the receptacle to rotate the latter.

In testimony whereof I atlix my signature in presence of two witnesses.

MASON D. PRATT.

Vfitnesses GRACE M. HARCLERODE, C. G. Froxns.

Copies of this patent may be obtained for ve cents each, 'by addressing the Commissioner of Patents, Washington, D. C.

Images