US1918799A - Means for applying plaster materials - Google Patents

Description

July 18, 1933. A CONLEY MEANS FOR APPLYING PLASTER MATERIALS Filed Sept. 1, 1930 3 Sheets-Sheet l ATTOR/VEX July 18, 1933, H. A. CONLEY 1,918,799

MEANS FOR APPLYING PLASTER MATERIALS Filed Sept. 1, 1930 5 Sheets-Sheet 2 [/v VE/V 70/? Hug/z A. Con/2y,

July 18, 1933. H. A. CONLEY MEANS FOR APPLYING PLASTER MATERIALS Filed Sept. 1, 1930 3 Sheets-Sheet 3 lll Arromvex Patented July 18 1933 UNl'IED STATES EATENI ()FFICE HUGH A. GONLEY OF LYNWOOD, CALIFORNIA, ASSIGINOR TO CONLEY PLASTERING MACHINE COMPANY, INC., OF COIVIPTON, CALIFORNIA, A. CORPORATION OF CALI- FORNIA MEANS FOR APPLYING PLASTER MATERIALS Application filed September 1, 1930. Serial No. 479,113.

My invention relates to a device for coating a surface with an adheringsubstance, such as a plastic mixture, which, after its application, will harden. The particular use to which I am at present putting my invention is for the application of plaster to the walls of structures, but the following disclosure of the preferred forms of my invention is merely illustrative of the wide utility to which my invention is adapted. The invention disclosed herein is of the general character disclosed in my United States Letters Patent No. 1,737,014, entitled Plaster ing machine issued November 26, 1929, in

ii which I have shown a plastering head havmg a rotary member mounted within a casing having an opening in the peripheral wall thereof through which the rotary member flings or splatters a mixture of plaster ingredients against a wall, and having means for delivering the plaster ingredients through separate channels to the rotary member where they are mixed.

My present invention comprehends an improved plaster applying device including an applying member adapted to be moved relative to a surface to which plaster materials are to be applied, this applying memher having a head to which the plaster materials are delivered, and an efficient mechanism in said head for impelling said plaster materials onto the surface to be plastered substantially without loss. Although the most extensive use of my invention is for applying plaster to wall surfaces, it may be satisfactorily used in applying to the surfaces of walls or objects materials which are ordinarily applied thereto in plastic form and in the form of a coat which hardens upon drying.

My present invention involves a new and valuable principle of operation and includes mechanism operating in accordance with this principle. Instead of applying the plaster materials by use of air pressure or by use of centrifugal motion, my new machine involves the principle of batting the materials toward and onto the receiving surface. In carrying out this principle the plaster materials are set into motion and while in such motion are struck by moving members which may be reasonably termed bat members, the result thereof being that the path of movement of the plaster materials is immediately changed, and the plaster materials are consequently impelled or batted onto the surface to be coated. I find that by using a machine of this new character I am able to control the application of the plaster materials in such a manner that various plaster effects may be readily attained, and by use of this machine I am able to prepare on wall surfaces a plaster coating of such porosity that sound refiection and reverberation are reduced to a minimum. The device is therefore of great value in finishing the walls of theaters, auditoriinns and sound-proof stages, as the wall coatings formed thereby are of exceptionally good acoustic characteristics.

The invention includes a new plaster applying head having batting means therein, and means for delivering the plaster materials through ilexible conduit members from a hopper device equipped with means for. constantly delivering the plaster materials into the'conduit means.

It is also an object of the invention to provide a mining device for delivering plaster materials, such as sand and cement, sand and lime, sand and plaster or various combinations thereof, in well mixed condition to the flexible conduit by which the plaster materials are carried to the applying head which is preferably of light weight and equipped with a handle whereby it may be manually maneuvered relative to a wall surface.

A further object of the invention is to provide a hopper device and means for delivering the plastering materials from the hopper device into the delivery conduit, this means being so formed that a flow of air upwardly into and through the hopper is prevented. It is a still further object of the invention to provide a novel method of throwing plastic constituents against a surface to be plastered.

Further objects and advantages ofmy invention wil be made evident in the following part of the specification.

Referring to the drawings, which are for illustrative purposes only,

Fig. 1 is an elevational view showing my invention and the manner of its operation.

Fig. 2 is an enlarged fragmentary cross section taken substantially on a plane indicated by the line 22 of Fig. 1.

I F 3 is an enlarged fragmentary cross section on a. plane represented by the line 5-3 of Fig. 2.

F iis a fragmentary sectional view showing an alternative form of applying head construction.

Fig. 5 is a fragmentary section on a plane represented by the line 5-5 of Fig. 1.

Fig. is an enlarged section through the delivery means for plaster materials shown in conjunction with the hopper device of Fig. 1.

Fig. 7 is a cross sectional view derived as indicated by the line 7 7 of Fig. 6.

Fig. 8 s a fragmentary sectional view showing an alternative form of mechanism for delivering plaster materials from the hopper to the conduit which extends to the applying head of the invention.

Illustrative of the utility of my invention I show an applying member 15 includingan apply ing head 16 secured to the end of'a handle 17 whereby it may be gripped by a workman and maneuvered relative to a wallsurface 18 in the process of applying a coating or layer of plaster 20. The applying head 16 includes batting means 21 in the form of a rotary hub 22 having outwardly extending plates or bat members 23 which are provided at their inner ends with cylindrical enlargements 24 which are received in depressions 25 of the hub 22 so that the mem- "bers 23 ma be swung to either side of the radially extending position in which they are shown in Fig. 8. Extending outwardlyat the sides of the members 23 are annular, radially directed thin-walled rings 26 which are turnable on the hub 22 and have slots 27 therein which receive projections 28 formed on the edges of the members 23. By rotating the rings 26 relative to the hub 22, the angular positions .of the members 28 relative to their line of movement may be varied within the limits of an angle such as indicated by the dotted lines 30 of Fig. 3. One of the rings 26 may be secured in a desired position of adjustment by means of a screw 31 extended through a slot 82 in a flange formed at an end of the hub 22.

Supporting the hub in rotative position is a shaft 35 extending through bearings '36 in side plates 37 and 38 of the head 16, which plates are preferably circular in form and are secured by means of rivets or screws 40 to a peripheral wall member 11 havi a downwardly extending ferrule d2 for secui' ing thehead 16 to the outer end of the handle 17 The leftward end of the shaft 35 has a bevel gear 13 secured thereto which is adapted to be drivenby a bevel pinion 1 1 carried on the upper end of a shaft 4.5 which 03'.- tends from a motor 1-6. lVhcn the motor 46 is in operation, the rotary member or means 21 is rotated in the direction of an arrow 17 of Fig. 3. Forming p of the head 16 is a delivery nozzle 48 wlicn co. .tutes a means for throwing the plaster materials toward or into the path of the moving bat members 28. The nozzle comprises walls 50 which form passage 5 which (13: do forwardly over the upper portion of the head 16 and has its forward end 52 rcversely turned so t iat the mouth or outlet f the passage is directed downwardly and rearwardly so as to direct the mate ials which pass through the passage 51 a st the bat members 28 in substantially the c rection indicated. by arrows 5 1. The rearward end of the passage 51 is formed with a primary inlet 55 and a secondary inlet Cooperating with the applying member 15 is a portable carriage 57 having hoppers 58 and 60 for plaster materials. On the bottom wall of these hoppers is secured a delivery member 61 having an outlet 62 from which a flexible conduit member or hose 63 extends to the primary inlet 55 of the delivery nozzle 418. A water hose 6 1 is carried from a suitable source of supply to the secondary inlet 56 of the nozzle 418. As shown in 6 the delivery member 61 comprises a casing consisting of an upp r part 65 of conical shape and an inverted conical lower part 66. By means of'screws 67 the upper part 65- may be secured to the bottom wall 68 of the hoppers 58 and 60 which are divided by a central or division wall 70. The bottom wall 68 has a discharge opening 71 therein which is centralized relative to'the partition wall 70, and by use of screws 72 a downwardly directed collar 73 is secured to the wall 68 in position centralized with the opening 71. Projecting through an opening 74 in the lower portion of the wall and covering the outlet opening 71 is a cowl or hood'75 of substantially semi- ,cylindrical cross section, and extending downwardly from the upper portion of the hood is a bearing block 76 which I have shown securedin place. by screws 77'. Extending horizontally and in opposite directions from the bearing block are shafts 7 8 and 79 which carry feed screws 80 and 81 for conveying materials from the hoppers 58 60 to the discharge opening 71 and the c indrical opening or discharge mouth formed within the collar 73. Projecting upwardly from a hearing 83 in the lower portion of the delivery member 61 is a shaft 8 1 which engages a hearing 85 formed in the lower portion of the bearing block 76. ()n the shaft 81 a rotor 86 including a hub 87 and an annular casing 88 having" rearwardly spiralled exhaust or discharge nozzles 90 extending therefrom.

The upper and lower walls 91 and 92 of the rotor 86 slope downwardly in the manner shown, and projecting upwardly from the upper wall 91 is a cylindrical wall 93. On the I the collar 73. For driving the shaft 84, I

provide a helical gear 97 on the lower end thereof and a helical pinion 98 mounted on a shaft 100 in position for driving engagement with the gear 97. Projecting downwardly from one side of the lower portion 66 of the member 61 is a pocket or depression 101 which connects with a downwardly sloping tubular body 102, as shown in Fig. 1, which body 102 has the outlet 62 formed at the leftward end thereof and has an air nozzle 103 connected into its rightward end, this air nozzle being fed with air from a hose 104.

In the operation of the plastering device, moist sand may be placed in the hopper 58, and a cement material, such as Portland cement, or a binder material for plaster, such as gypsum or lime in powdered form, may be placed in the hopper 60. The apparatus is then set in operation by starting a motor 106 which drives the feed screws and 81, the

air supply to the hose 104 is turned on, water is fed through the hose 64, and the motor 46 of the applying device 15 is started to produce rotation of the batting means 21. The

shafts 78 and 79 are rotated at such speed that the screws will deliver the plaster mate rials from the hoppers 58 and 60 to the outlet opening 71 in desired proportions. Here the materials are engaged by the beater and mixing member 94 and are carried downwardly into the interior of the rotor 86. The centrifugal action of the rotor 86 causes these materials to be flung outwardly in mixed condition through the exhaust or discharge nozzles into the lower part 66 of the member 61, the materials naturally tendlng to slide down the sloping walls toward the pocket 101 which communicates with. the tubular member 102. A scraper or disloc ging member 110 rotates across the lower part 50 of the inner conical wall 66 so as to prevent lodging of the mixed materials on the walls of the member 66. This scraper has a bracket 111 and a bracing arm 112. The bracket 111 55 is secured to the hub 87 of the rotor 86 and rotates therewith. As the plaster materials drop into the member 102, they are picked up by the blast of air from the nozzle 103 and are carried through the flexible conduit 63' into the passage 51 of the delivery nozzle 48 forming part of the head 16. The dry materials passing as indicated by arrows of Fig. 3, through the passage 51 are combined with a spray of water delivered through the secondary inlet 56 from the water hose 64. The plaster materials, including the proper delivery or applying head 16.

amount of water, are delivered toward the bat members 23, as indicated by the arrows 54, and are batted or impelled forwardly, as indicated by the arrows 121, in a constant stream or flow. By holding the applying de- Vice 15 as shown in Fig.1 and maneuvering it across theface of the wall 18, a coating of plaster of desired thickness may be applied in such moist condition as may be desired. If

the plaster is to be troweled, sufficient moisture is provided by controlling the How of water through the secondary or water inlet 56, but if it is desired to form a plaster coating of porous character, the moisture content may be cut down. WVhere the plaster coating is employed in porous form no troweling is necessary, for the plaster coating is left in its original rough condition.

In Figs. 4 and 5, I show an alternative form of delivery nozzle for use with the This nozzle 130 has a cylindrical wall 131 at the forward end thereof and has an end wall 132, which curves downwardly and rearwardly, enclosing a. delivery chamber 133 of elongated cylindrical form. Leading into the upper rearward end of the chamber 133is an air and solid material inlet opening 134 which is connected to the flexible conduit 63 so that an air stream carrying solid materials will be delivered into the upper portlon of the nozzle 130, as indicated by arrows 135.

neath the inlet 134 forming a chamber 137 from which an inlet or spray opening 138 communicates with the chamber 133, this spray opening 138 being directed upwardly toward the top of the chamber 133 so as to combine with the flow entering through the inlet 134 as indicated by the arrows 135. An adjustment screw 139 serves to control the flow through the spray opening 138. Communicating with the chamber 137 is a water inlet 141 which is connected to the hose 64 of Fig. 1. In this form of the invention the plaster materials pass forwardly in the upper portion of the chamber 133 and are deflected downwardly and rearwardly by the end wall 132, as indicated by arrows 142, into the path of movement of the impelling or bat members 23. The movement of the plaster materials downwardly and rearwardly into the path of the members 23 may be assisted by a blast of fluid, such as compressed air, delivered through an auxiliary nozzle 143 which is fed through a tubular member 144 from asuitable source supply Mounted axially in the front wall 132 of the member 130 is a shaft 145 which projects into the chamber 133 and has a scraper 146 mounted thereon. By rotatin a handle 147 mounted on the forward end of the shaft 145 the scraper 146 may be rotated so as to clean the walls of the chamber 133 should plaster materials accumulate thereon.

The deliv 'ery nozzle 130has walls 136 disposed be- In Fig. 8, I show an alternative form of delivery mechanism for delivering solid materials from the hoppers 58 and 60, into the flow of air which is carried to the applying head 16. In this device a cylindrical body 150 is secured in communication with the opening 71 by means of a flanged fitting 151 which is bolted to the inlet opening 152 of the member 150. To the outlet 153 of the member 150 an injector 154 is bolted, this injector having an inlet passage 155 and a downwardly sloping injector passage 156. An air nozzle 157 is connected to the injector 154, and the tubular flexible conduit 63 is connected as shown. The cylindrical memher 150 has its axis horizontally directed and mounted on an axial shaft 160 is a rotary gate member 161 which rotates within the member 150. The gate member 161 includes a hub 162 and a plurality of radially extending vanes 163 which reach nearly to the cylindrical wall of the member150 and are provided with packing orsealing members 16& which mayconsist of fabric or leather plates riveted to the faces of the vanes 163 and engaging the inner walls of the cylindrical member 150. In the operation of this mechanism, the screws 80 and 81 deliver the solid and plaster materials continuously to the outlet opening 71, whereupon these materials drop into the upper portion of the cylindri cal member 150 and lodge in the upwardly disposed faces between the'vanes 163so that as the rotarly member 161 is rotated, the plaster materia s are carried around and dropped through the outlet 153 and the passage 155 into the passage 156, where the materials are picked up by the air stream and carried through the conduit 63 to the applying head 16. 'The rotary member 161 acts as a gate between the hoppers and the passage 156 in which an air pressure exists, and prevents air from blowing up through the hoppers, which are open at their tops. From the air nozzle 157 a small pipe 165 is'connected to a side wall of the cylindrical member 150 so as to direct a blast of air downwardly through the lower portion of the member 150, as indicated by an arrow 166, to'quickly discharge plaster materials from the spaces between the vanes 163 as suchspaces come into alignment with the outlet 153.

To prevent the inner portions of the spaces between the impelling members 23 from accumulating materials, I employ walls 170, as shown in Fig. 3, consisting of plates 171 and 172 hinged to the members 23, as indicated at 173 and 174, and slidably secured together by such means as rivets 17 5 adapted to project from the plate 171 through a slot 176m the plate 172. The walls 170, being in this manner formed with slidably joined plates, may change in length as may be required in the swinging of the batting memhere between the angular positions indicated by the dotted lines 30.

-I desire to call particular attention to the important feature of my invention which consists of the previously described means for combining moist sand with dry plaster, lime, or cement, and thoroughly mixing these ingredients together so that the resulting mixture which passes through the conduit 63 to the applying head 16 is in a moist condition. The beating and mixing device 94 thoroughly mixes the moist sand with the dry plaster ingredients and absorbs moisture therefrom, so as to prevent possibility of the moist sand sticking at any place within the device and to avoid possibility of the wet sand wetting surfaces to which the plaster ,materials would stick and build up in bodies so as to clog the passages. In this device I have provided means for properly moistening or wetting the plastervmaterials, but yet am able to keep the plaster materials in such condition while they are passing from the hopper to the applying head that these materials will not stick to the walls of the passages and clog same. The spray of water through the water inlet 56 into the passage of the delivery nozzle 48 wets the plaster ingredients and intermixes therewith in such a manner that flying of dust is prevented, owing to the fact that each particle of plaster material is properly wetted at the time it is impelled onto the wall surface by the bat members 23.

Although I have herein shown and described simple and practical embodiments of my invention, it is recognized that certain parts or elements thereof are representative of other parts, elements, or mechanisms which may be employed in substantially the same manner to accomplish substantially the same results; therefore, it is to be understood that the invention is not to be limited to the details disclosed herein but is to be accorded the full scope of the followingclaims.

I claim as my invention:

1. In a plastering device of the character described, the combination of: a head; a support for said head by which it may be maintained in operative position relative to a receiving surface; bat members carried by said head; each of said members being provided with a plane contact face; means for moving said bat members; and means for delivering plaster materials to said contact faces of said bat members.

2. In a plastering device of the character described, the combination of r a head; a support for said head by which it may be maintained in operative position relative to a receiving surface; bat members carried by said head; each of said members being provided with a relatively broad contact face; means for movlng sald bat members; and means for delivering plaster materials into the path of said bat members. I

movement of said contact faces of said bat members so that suchmaterials will be struck by said bat members and impelled toward said receiving surface.

3. In a plastering device of the character described, the combination of: a head; a support for said head by which it may be maintained in operative position relative to a receiving surface; bat members carried by said head; each of said members being provided with a relatively broad contact face; means for moving said bat members; and means for delivering plaster materials to said bat members in a direction toward the contact faces of said bat members.

4:. In a plastering device of the character described, the combination of a head; a support for said head by which it may be maintained in operative position relative to a receiving surface; bat members carried by said head; means for angular adjustment of said bat members relative to their lines'of movement; means for moving said bat members; and means for delivering plaster materials to 5. In a plastering device of the character described, the combination of: a head; a support for said head by which it may be maintained in operative position relative to a receiving surface; bat members carried by said head; means for angular adjustment of said bat members relative to their lines of movement; means for moving said bat members; and means for delivering plaster materials I to said bat members in a direction toward the front faces of said bat members.

6. In a plastering device of the character described, the combination of: a head; a support for said head by which it may be maintained in operative position relative to a receiving surface; bat members carried by sald head; means for moving said bat members; and a delivery nozzle 011 said head having a delivery passage pointed inwardly toward the front faces of said bat members so that plaster materials delivered through said delivery passage will be thrown against the front faces of said bat members.

7 In a plastering device of the character.

described, the combination of: a head; a support for said head by which it may be ma1n-' tained in operative position relative to a receiving surface; bat members carried by said head; means for moving said bat members; and a delivery nozzle on said head having an end wall turned downwardly and inwardly so as to direct plaster materials against the front faces of said bat members. 8. In a plastering device of the character described, the combination of: a head; a support for said head by which it may be maintained in operative position relative toa receiving surface; bat members carried by said head; means for moving said bat members; and a delivery nozzle on said head having a primary inlet for air and solid materials and a secondary inlet for liquid and having a delivery passage pointed inwardly toward the front faces of said bat members so that plaster materials delivered through said delivery passage will be thrown against the front faces of said bat members.

9. In a plastering device of the character described, the combination of: a head; a support for said head by which it may be maintained in operative position relative to a receiving surface; bat. members carried by said head; means for moving said bat members; and a deliverynozzle on said head having a primary inlet for air and solid materials and a secondary inlet for liquid and having an endwall turned downwardly and inwardly so as to direct plaster materials against the front faces of said bat members.

10. In a plastering device of the character described, the combination of a head; a support for said head by which it may be maintained in operative position relative to a receivingsurface; a rotor carried by said head, said rotor having outwardly extending impelling members; each of said members having a relatively broad contact face; means for rotating said rotor; and means for delivering plaster materials forcibly inwardly into the path of movement of said impelling members so that such plaster materials will be engaged by said contact faces of said impelling members and flung onto said receiving surface.

11. In a plastering device of the character described, the combination of: a head; a support for said head by which it may be maintained in operative position relative to areceiving surface; a rotor carried by said head, said rotor having outwardlyextending impelling members; each of said members having a relatively broad contact face; means for rotating said rotor and means for directing an air blast carrying plaster materials inwardly into the path of movement of said impelling members so that such plaster materials will be engaged by said contact faces of said impelling members and flung onto said receiving surface.

12. In a plastering device of the character described, the combination of: ahead; a sup port for said head by which it may be maintained in operative position relative to a receiving surface; a rotor carried by said head, said rotor having outwardly extending impelling members; means for rotating said rotor; andmeans for directing an air blast carrying plaster materials inwardly into the path of movement of saidimpelling members and toward the front faces of said impelling members so that such plaster materials will be engaged by said impelling members and flung onto said receiving surface. 13. In a plastering device of the character said rotor having outwardly extending impelling members; means for rotating said rotor; a delivery nozzle on said head for delivering plaster materials into the path of movement of said impelling members; a

hopper having an outlet; an injector connected with said outlet; conduit means extending from said injector to said delivery nozzle; and means for supplying air under 7 pressure to said injector to carry plaster materials from said hopper to said delivery nozzle. i

14. In a plastering device of the character described, the combination of: a head; a supv port for said head by which it may be maintained in operative position relative to a receiving surface; a rotor carried by said head, said rotor having outwardly extending impelling members; means for rotating said rotor; a delivery nozzle on said head for delivering plaster materials into the path of movement of said impelling members; a hopper having an outlet; an injector connected with said outlet; conduit means extending from said injector to said delivery nozzle; means for supplying air under pressure to said injector to carry plaster materials from said hopper to said delivery nozzle; and means for supplying liquid to said, delivery nozzle for combination in said nozzle with a blast of air carrying plaster materials through said nozzle.

15. In a plastering device of the character described, the combination of: a head; a support for said head by which it may be maintained in operative position relative to a receiving surface; a rotor carried by said head,

said rotor having outwardly extending imwpelling members; means for rotating said rotor; a delivery nozzle on said head for delivering plaster materials into the path of movement of said impelling members; a hopper having an outlet; an injector connected with said outlet; centrifugal means between said outlet of said hopper and said injector for delivering solid materials from said hopper to said injector and resisting the flow of air from said injector into said hopper; conduit means extending from said injector to said delivery nozzle; and means for supplying air under pressure to said injector to carry plaster materials from said hopper to said delivery nozzle. r

16. In a plastering device of the character described, the combination of: a head; a support for said head by which it may be maintained in operative position relative to a receiving surface; a rotor carried by said head, said rotor having outwardly extending impelling members; means for rotating said rotor; a delivery nozzle on said head for delivering plaster materials into the path of movement of said impelling members; a hopper having an outlet; an injector connected with said outlet; means between said outlet of said hopper and said injector for delivering solid materials from said hopperto said injector and resisting the flow of air from said injector in said hopper; conduit means extending from said injector to said delivery nozzle; and means for supplying air under pressure to said injector to carry plaster materials from said hopper to said delivery nozzle. 7

17 Ina plastering device of the character described, the combination of: a head; a support for said head by which it may be maintained in operative position relative to a receiving surface; a rotor carried by said head, said rotor having outwardly extending impelling members; means for rotating said rotor; a delivery nozzle on said head for delivering plaster materials into the path of movement of said impelling members; a hopperhaving an outlet; an injector connected with said outlet; means between said outlet of said hopper and said injector for delivering solid materials from said hopper to said injector and resisting the flow of air from said injector into said hopper; conduit means extending from said injector to said delivery nozzle; means for supplying air under pressure to said injector to carry plaster materials from said hopper to said delivery nozzle; and means for supplying liquid to said delivery nozzle for combination in said nozzle with a blast of air carrying plaster materials through said nozzle.

18. In a plastering device of the character described, the combination of: a head; a support for said head by which it may be maintained in operative position relative to a receiving surface; bat members carried by said head; each of said members being provided with a relatively broad contact face; means for movin said bat members; and means for delivering plaster materials forcibly inwardly into the path of movement of said bat members so that such plaster materials will be engaged by said contact faces of said bat members and flung onto said receiving surface.

19. In a plastering device of the character described, the combination of: a head; a support for said head by which it may be mantained in operative position relative to a receiving surface; bat members carried by said head; each of said members being formed with a relatively broad contact face; means for moving said bat members; and means for directing an air blast carrying plaster materials inwardly into the path of movement of said bat members so that such plaster materials will be engaged by said contact faces of said bat members and flung onto said receiving surface.

described, the combination of: a head; a support for said head by which it may be maintained in operative position relative to a receiving surface; bat members adjustably mounted in said head; means for angular adjustment of said bat members relative to their lines of movement; means for moving said bat members; and means for delivering plaster materials to said bat members in a direction toward the front faces of said bat members.

HUGH A. CONLEY.

CERTEFICATE OF CGRREGTEQN.

Patent N0. 1318,799. July E8, 1933.

HUGH A. CONLEY it is hereby cartfied that error appears in the printe; specification at the above numaered patent requiring correction as follows: Eage 61, line 73, claim 16, tar "in" read "hats"; and that the said Letters Fateitt shmfld ha rsad with this aerrection therein that tie same may conform tn the recent a? the case in the Patent Office.

Signeti amt sealed this 22nd day a August, A. D. E93.

M. J. Moore.

(Seal) Acting flemmissieser at Patents

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