US1997897A - Coating and plastering machine - Google Patents

Description

April 16, 1935. H. A. CONLEY COATING AND PLASTERING MACHINE 3 SheetsSheet 1 m w 5 F M w F 0 0 7 7,-. U 9. 7 4 w 93 A W m w 1| 2 2+1] ww o w .,L 3 W 9, W 0o 9 0 w e L79 9 1 l 9 w a 0 mm 7 IL 6 9 w April 16, 1935. H. A. CONLEY COATING AND PLASTERING MACHINE Filed Feb. 14, 1951 3 Sheets-Sheet 2 [/Vl/ENTOR: Hug/114.60 le ATTORNEY April 16, 1935. H. A. CONLEY COATING AND PLASTERING MACHINE Filed Feb. 14, 1931 3 Sheets-Sheet 5 d 0 2 n 5 k 4 0 a 5. 7 5 6 5 A 5 4 6 a .1 9 0 54W 5 a u/ 2 M r W 0 Z [9. 4 o u 4 fi 3 76 6 7 F 5 3 .w 6 Z 4 m 4 w Patented Apr. 16, 1935 UNUITED STATES PATENT OFFICE ley Calif., a corpo Plastering Machine Company,

tion of California Compton,

Application February 14, 1931, Serial No. 515,701

7 Claims.

My invention relates to plastering or surface coating machines employing a delivery head which receives the ingredients from which the coating is formed and mixes these ingredients as part of the operation of applying them toea surface to be coated. The invention is of especial utility in applying plaster, insulating, and weather-proof coatings to wall members and is also of utility for acoustic purposes wherein sound-proof porous coatingsare applied to walls of auditoriums or rooms wherein reverberation and echo are to be maintained at a In the use of this type of machine the coating material is composed of solids in granular'or powdered form and a binder material or a binder and a diluent.

In the use of the invention for applying plaster to walls, the materials generally selected include sand or finely ground rock, lime, cement, water, etc. The cement or lime serves as abinder for the sand or rock particles but requires the presence of water in order to produce adhesion of the binder materials to the wall and to the sand and rock particles. For other coatings, such as a somastic coating for water-proofing and insulating pipe lines, sand and gravel are employed as an aggregate, and a pitch or tar substance is used as a binder. This pitch or tar binder in such use of the invention is delivered to the applying head in melted condition so as to readily adhere to the particles of other materials employed in the coating. Upon hardening or solidifying, the tar or pitch binder effectively holds the non-adhesive particles together.

It is an object of my invention to provide a machine of this character having a pair of hoppers for the dry materials and feeding means for delivering the dry materials to the applying head from one hopper at a time, making it possible to fill the other hopper so that it will be ready for use when the first hopper is emptied.

It is a further object of the invention to provide a novel type of valve connection and valve means for controlling the how of air through the conduits connected with the delivery hose which leads to the applying head, in such a manner that air will not be discharged in reverse direction through the hopper which is held open for the purpose of being filled.

A further object of the invention is to provide a simple combined drive and valve controlling means for automatically controlling the distribution of air to thedelivery means of-the hoppers and for selectively driving the feeding mechanisms associated with the respective hoppers.

A further object of the invention is to provide a simple form of rotary applying mechanism for use in the applying head of the device, which 5 will effectively mix the constituents of the coating to be applied, which will not readily become clogged, and which maybe easily cleaned.

A further object of the invention is to provide in an applying head a rotary member having peripherally arranged radial flinging or batting members disposed around a circular interior space and having a spray or fluid delivery device within this space.

A further object of the invention is to pro- 15 vide an applying head having external delivery passages for the delivery of constituent material into the path of the rotating blades or bat members in an inward and forward direction.

Further objects and advantages of the inven- 20 tion will be made evident throughout the following part of the specification.

Referring to the drawings, which are for i1- lustrative purposes only,

Fig. 1 is a front elevation of the feeding de- 25 vice for feeding constituent solid materials to the applying head of the coating device.

Fig. 2 is a vertical cross section taken substantially on a plane represented by the line 22 of Fig. 1, showing the applying head attached to 30 the feeding device.

' Fig. 3 is an enlarged section on a plane represented by the line 3-3 of Fig. 1.

Fig. 4 is an enlarged cross section on a plane represented by the line 4-4 of Fig. 2.

Fig. 5 is a cross section on a plane represented by the line 5-5 of Fig. 4.

Fig. 6 is an enlarged cross section on a plane represented by the line 66 of Fig. 2, showing the construction of the automatic non-reverse 40 valve.

Fig. '7 is a cross section on a plane represented by the line |1 of Fig. 6.

Fig. 8 is an enlarged cross section on a plane r epresented by the line 8-8 of Fig. 1.

As shown best in Figs. 1 and 2 my invention employs a feeding device ll including a carriage l2 on which hoppers I3 and I4 are mounted and feeding mechanisms 15 at the lower ends of the hoppers I3 and IQ for delivering solid materials into an air stream which passes either through a flexible conduit I6 or a flexible conduit I! to a Y-shaped valve member l8 which is connected by means of a delivery hose 20 to the applying head 2| of an applying device 22. The applying device includes a hollow handle 23 having an electric motor 24 secured to its lower end, which electric motor may be energized by current delivered through a cord or cable 25. At the upper or outer end of the handle 23, a gear box 23 is secured. From the motor 24 to the gear box 23, a drive shaft 21 is extended, and within the gear box 23 a worm 23 is secured to the upper end of the shaft 21 in position to drive a worm gear 33 which is also mounted in the gear box 23. As shown in Fig. 4, a tubular member 3| extends from a boss 32 formed in the outer wall 33 of the gear box 23 through the central opening 34 of the worm gear 33 into a cylindrical casing 35. Supported on this member 3| are bearings 33 which carry a rotor 31 having an inner wall 33 which is secured by means of screws 33 to the worm gear 33: In alignment with the wall 33 is a concentric ring 4| which is of the same external diameter as the wall 33, and between the peripheral portion of the wall 33 and the inner face of the ring 4|- radial members or blades 42 are extended. To increase the fan action of the members 42, the inner edges thereof may be bent forwardly as indicated at 42a, and for the purpose of directing a greater portion of the air which travels outwardly against the rearward faces of the radial members 42, diagonal baflies 43 are extended across the lower portions of the spaces between the members 42. These baiiles 43 slope forwardly and outwardly so that the inner faces thereof are inclined toward the rear faces of the members 42. It is not intended to convey the idea that these baiiles are necessary in all uses of the invention, as when heavy solid materials are employed, the tendency for such materials to collect on the rear faces of the blades 42 is not very great; but where the solid materials are light weight or where the diluent materials are of very adhesive character, the bullies are employed to assist in the cleaning action of the rear faces of the blades.

The rightward bearing 33 supports a hub 43 which is connected to the ring 4| by means of fan blades 44 which are so formed that when the rotor 31 revolves in the forward direction indicated by the arrow 45 of Fig. 5, air will be drawn into the space 46 within the rotor 31 as indicated by arrows 41, and this air will be discharged outwardly through an opening 43 in the upper rightward portion of the cylindrical wall 53 of the casing 35. On the upper and rearward portion of the casing 35, walls 5| form a solids delivery passage 52 having an inlet nipple 53 to which the tubular member or delivery hose 23 may be attached, and having its outer end curved forwardly and downwardly toward the opening 43 in the upper forward part of the casing 35 so as to deliver a flow of air and entrained solids, as indicated by the arrows 55, into the path of movement of the members 42 which engage the particles and cause them to be flung forwardly, as indicated by the arrows 53. Above and adjacent the outlet 51 of the passage 52 is a fluid spray nozzle 53 which is fed through a tube 53 which extends over the top of the passage 52 and is connected to a water hose 3|. A branch pipe or tube 62 is extended from the hose 3| to the leftward end of the tubular member 3|, as shown in Figs. 2 and 4. This tubular member 3| is provided with an upwardly projecting spray head 33 having upwardly directed spray openings 34 which discharge water upwardly within the space 43 at the same time water is being sprayed downwardly from the spray nozzle 53. The stream of air and entrained solids issuing from the outlet 51 of the passage sz-is combined with particles of water fed into the stream from both above and below, thus accomplishing athorough moistening of the solid particles before they are thrown by the applying head 2|, as shown in Fig. 2, onto a wall such as provided by a pipe 35 so as to form a coating 33 thereon.

As shown in Figs. 1 and ,3, the feeding mechanisms I3 which are secured to the lower conical ends I3 of the hoppers I3 and I4 include a body II having a downwardly and forwardly sloping inlet wall I2 which communicates with a horizontally and laterally directed cylindrical wall 13 in which a feed screw I4 is mounted on a shaft I5. As shown in Fig. l, the shafts I5 project beyond the ends of the tubular walls 13 and have drive gears 13 and TI mounted respectively thereon. At the outer end of each tubular wall I3 is a cup-shaped casing 13 forming a delivery member into which a screw I4 discharges. As shown in Fig. 8, a downwardly and forwardly sloping tube 33 intersects the lower portion of each casing I3 and communicates with the interior of the casing I3 through an opening 3|. The inlet ends 32 of the tubes 33 connect with a three-way valve 33 through hos'e members 34 and 35 which connect respectively to the outlets 33 and 31 of the valve 33. Air under pressure is fed through an air inlet hose 33 to the inlet '33 of the valve 33, and depending upon the position of the control lever 3| which is mounted on the extended shaft 32 of the valve 33, the stream of air passes through either the hose 34 or the hose 35 through the tube 33 connected with the casing I3 and through either the hose I3 or II into the non-reverse valve I3 which connects to the delivery hose 23 which extends to the passage 32 of the applying head 2|. During this passage of air, a screw I4 draws the dry materials from the associated inlet member I2 and moves them into the adjacent casing I3 wherein they are picked up by the air stream and carried to the applying head.

Each member II has a vertical bearing I33 through which an agitator shaft I 3| extends from a gear case I32 to the interior of the associated hopper i3 or I4, the upper end of the shaft |3| being supported by a bearing I33 carried by a spider I34. The shaft |3| is provided with agitator paddles I 35 and is supported on a thrust bearing I35. The shaft |3| is driven by means of a worm |3I which engages a worm gear I33 secured to the lower end of the shaft, and'the bearing I33 is protected from entry of abrasive materials by a packing member I33 at its upper end. In addition to this, an inverted cup 3 is mounted on the shaft I 3| above and enclosing the upper end of the bearing 33. Extending laterally from the gear case I32 is a shaft III on which the worm I3! is mounted. It is to be understood that each of these mechanisms is duplicated in the feeding devices I5 shown with the respective hoppers I3 and I4; therefore, on the outer ends of the respective shafts III gears 2 are mounted which respectively engage the gears I3 and II in the manner shown in Fig. 2. Above the gears 13 and 11 a drive shaft 3 is held in bearings II4, this drive shaft being driven from a gear box 5 which is in turn connected to a power source, such as a motor 3. Splined on the shaft 3 in position to slide between the bearings H4 is a drive pinion I23 which carries erated, and at the same time the pinion I may be moved into engagement with the proper gear I8 or 11 so as to drive the feeding mechanism I5 to which air is being delivered by the valve 83. With the handle in the position shown in Fig. 1, the valve is so set that through the hose member 85 to the casing I8 associated with the feeding mechanism I5 of the hopper I4. Also, the pinion I20 is held in engagement with the gear 11 so as to drive the feed screw associated with the hopper I4. During this time no air is delivered through the hose member 84, and the cover I of the hopper I3 may be raised to permit refilling of the hopper with solid materials,

The non-reverse valve member I8 is constructed in the manner shown in Fig. 6 and consists of an outlet pipe I comprised of a pair of semi-cylindrical sections I3I and I32 which are flanged and are adapted to be secured together by means of screws or bolts I33. From the rearward or upper portions of the members I3I and I32, branch inlet pipes I34 and I35 extend. Between the flanges I3I of the members I3.I and I32 a movable closure member in the form of a wall I38 of canvas or other rugged fabric is clamped. The wall I38 is. adapted to close one or the other of the openings I40 and I of the inlet members I34 and I35 so as to prevent a reverse flow of air through the opening which the wall I38 obstructs.

As an example of the operation of the valve member I38, it may be assumed that air and entrained solid materials are passing through the connecting tubular member I1 and the inlet member I35 into the outlet portion I30 which connects by means of a nipple I42 with the tubular delivery member 20 connecting with the applying head 2|. At this time the force of the air holds the wall I38 leftwardly against the inner face of the semi-cylindrical member I3I, thereby effectively closing the opening I40 and preventing passage of air in reverse direction through the connecting hose I8 into the hopper I3. When the hopper I3 is in use and materials are being withdrawn therefrom, air

- and entrained solids will pass through the connecting hose I6 and the inlet member I34 and will deflect the wall I38 rightwardly so as to close the opening I to prevent a reverse flow of air into the hopper I4.

An important feature of my invention is that the solid materials, upon being discharged through the passage 52, are thoroughly wetted by sprays of water from above and below, thereby forming a consistent mixture. Another feature of my new applying head is the means which I employ to prevent accumulations of plaster materials on the backs of the blades 42 and in the spaces between the blades. It is a well known fact that when a member is moved through the air, a partial vacuum is formed adjacent the rear face thereof, with the result that particles of material will collect on the rear face. In my new rotary applying device, the flinging members or blades 42, which may be made of metal or other material, are peripherally arranged, and effective means is provided for delivering an outward flow of air into the spaces between these vanes so as to keep the condition of partial vacuum at a minimum and also to clean the surfaces of the blades. This flow of air is produced by the action of the fan blades 44 and by the centrifugal action of the members 42. When the rotor 31 is rotated at air will be deliveredoperating speed, air travels outwardly through the opening 48 at relatively high velocity. In this air is carried a spray ofwater from the spray member 83 so that there is a constant washing of the surfaces of the blades 42 in addition to the cleansing action of the blast of air which passes therethrough. To prevent creating dust in the atmosphere, the solid materials, where they are of fine character, may be moistened before being fed into the air stream passing through the delivery members or casings 18, by introduction of a controlled amount of water through water inlets I45 which are connected to the inlet walls I2, as shown in Fig. 3, and are fed through hose membersl.

Although I have herein shown and described my invention in simple and operative form, it

is recognized that certain parts and elements thereof are representative of other parts, elements or mechanisms which may be used in substantially the same manner to accomplish substantially the same results; therefore, it is to be understood that my invention is not to be limited to the details disclosed herein but is to be accorded the full scope of the following claims.

I claim as my invention:

1. A device for applying a coating, including: an applying means; walls forming a tubular member leading to said applying means; primary and secondary hoppers having substantially tight covers; primary and secondary delivery means respectively at the lower ends of said primary and secondary hoppers, there being a conveying device in each of said delivery means; means for connecting said delivery means to said tubular member; valve means for controlling a flow of air through the outlets of 'said delivery means for carrying materials from said delivery means to said tubular member; a power device; transmission means for transmitting power selectively from said powerdevice to said conveying devices of said delivery means; a control lever adapted to selectively operate said valve means so as to deliver air to the outlet of oneor the other of said delivery means; and a connection between said lever and said transmission means for causing said transmission means to deliver power to the conveying device of the delivery means the outlet of which is receiving air from said valve means.

2. A device for applying a coating, including: an applying head; a pair of hoppers; primary and secondary delivery means respectively connected to the lower ends of said hoppers; a primary feed screw in said primary delivery means; a secondary feed screw in said secondary delivery means; a primary gear connected to said primary feed screw; a secondary gearconnected to said secondary feed screw; a primary outlet casing at the outer end of said primary feed screw; a secondary outlet casing at the outer end of said secondary feed screw; tubular members leading from said outlet casings and being connected to said applying head; air inlet tubes leading toand connecting with said outlet casings; valve means for selectively delivering air to said air inlet tubes; a driven member having gear means adapted to selectively engage'said primary and secondary gears; a lever for operating said valve means; and a connection between said lever and said gear means to produce operative engagement of said gear means with said primary gear or said secondary gear in accordance with the 3. A device for applying a coating, including: an applying head; walls forming a tubular member leading to said applying head; primary and secondary hoppers having substantially tight covers; primary and secondary delivery means connected respectively with said hoppers; walls forming primary and secondary connecting tubes; a Y-fitting for connecting said tubular member to said primary and secondary delivery means, said Y-fltting having a pair of inlet open-' ings and having a movable wall therein for cov ering one of its inlet openings when air is passing through the other of its inlet openings; means for selectively operating said primary and secondary delivery means; means for i'orcing air through said connecting tubes into saidtubular member so as to convey materials delivered from said hoppers by said delivery means into said connecting tubes; and valve means for so controlling the flow of air that said flow of air will pass only through. the connecting tube associated with the delivery means in operation.

4. A device of the character describedfor applying materials so as to form a coating, including: a rotary member having impelling means thereon; means for driving said rotary member; walls forming a nozzle directed so as to deliver a. stream of air and solid materials into the path of movement of said impelling means; and fluid delivery means within said rotary member for delivering fluid radially outwardly into the path of movement of said impelling means.

5. A device of the character described for applying materials so as to form a coating, including: a rotary member having impelling means thereon; means for driving said rotary member;

walls forming a nozzle directed so as to deliver a stream oi' air and plaster-forming materials into the path of movement or said impelling means; and means for producing an outward flow of air through the path traversed by said impelling means.

'6. A device of the character described for applying materials so as to i'orm a coating, including: a rotary member having a plurality of impelling members thereon; means for driving said rotary member; 'walls forming a'nozzle directed so as to deliver a stream or materials into the path of movement 01' said impelling members; fluid delivery means within said rotary member for delivering a binder fluid radially outwardly into the, path of movement or said impelling members; ,and means for producing an outward flow of air through the spaces betweensaid imp ins m m rs. V

7. A deviceo't the character described, for applying materials so'as to form a coating, includ-- ing: a rotary member having a plurality of impelling members thereon means for driving said rotary member; walls forming a nozzle directed so as to deliver a stream' of materials into the impelling members;' said rotary member path of movement ,of said fluid delivery means within V for delivering a binder fluid radially outwardly into the path of movement of said impelling' members; an external fluid nozzle for spraying a binder fluid inwardly into the stream of ir and solid materials issuing i'romsaid nozzle; and means for. producing an outward flow of air through the spaces between said impelling members.

HUGH A. CONLEY.

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