US2702902A - Means for attaching objects to concrete and the like - Google Patents

Description

MEANS FOR ATTACHING OBJECTS TO CONCRETE AND THE LIKE Filed Jan. 2, 1952 March 1955 R. c. PORTOUW ET AL 4 Sheets-Sheet l INVENTORS ROBERT C. PORTOUW RICHARD BY FARNSWORTH ATTORNEY March 1955 R. c. PORTOUW ET AL 2,702,902

MEANS FOR ATTACHING OBJECTS TO CONCRETE AND .THE LIKE Filed Jan. 2, 1952 4 Sheets-Sheet 2 ROBERT C. PORTOUW EICHARD FARNSWQRTH ATTORN EY March 1955 R. c. PORTOUW ET AL 2,702,902

MEANS FOR ATTACHING OBJECTS TO CONCRETE AND THE LIKE Filed Jan. 2, 1952 4 Sheets-Sheet 3 IO N INVENTORS ROBERT C PORTOUW i ICHARD FARNSWORTH ATTORNEY March 1, 1955 R. c. PORTOUW ET AL 2,702,902

MEANS FOR ATTACHING OBJECTS TO CONCRETE AND THE LIKE Filed Jan. 2, 1952 4 Sheets-Sheet 4 T B w w 2 cu m I I A I.

. IN V EN TORS ROBERT C. PORTOUW EJCHARD FARNSWORTH ATTORNEY United States Patent MEANS FOR ATTACHING OBJECTS TO CONCRETE AND THE Robert C. 'Portonw and Richard Famsworth, Portland, 0mg, assignors to Powder Power Tool Corp, Portland, Oreg., a corporation of Oregon Application January .2, 1952,:SeriaLNo. 264,518

Claims. v(Cl. l-1--44.5.)

"including devices utilizing explosively-actuated elements, whereby ob ects, such as, for "example, "sacks containing demolition charges, may be satisfactorily secured to concrete wallsjbridge piers, ,etc. Inasmuch as explosively-acmated elements or projectiles, which are customarily driven into "the solid mass of concrete or'masonry .to'serve as securing members, are limited in cross sectional diameter to the bore of the gunbarrel'fromwhichthey are dis- -'charged,when articles such as sacks 'arereguired tube at- ;tached to concrete surfaces through "themediumof such projectiles, it is necessary to provide some companion vfasltening member oreler'n ent .inorder to prevent the sack or other article from slipping off "the enibedded projectile or to prevent the projectile "from passing entirely through such'object when becoming embeddedin the concrete.

An-object of the present invention accordingly is to provide a pair of .suitablecooperatin'g fastening elements, one of'whic'h will constitute .the customary explosivelydriven projectile and the other of whichwill engage the headof such projectile asithe proj'ectile passes through the object to be secured "to the concrete and will thus combine *with the projectile head in holding theadjacentportion of such object firmly pressed against the concrete surface and in preventing the object from slipping olfthe head of the embeddedprojectile.

Another object :of the invention is to provide improved means bywhich and "froin'which both of such cooperating fastening elements will ..be delivered as required for attachment ;to a concrete or other masonry mass.

Azrelatedobject of the invention is "to provide an im- ,proved device which will include agp'air of magazines conltaining supplies of .said cooperating fastening elements respectively and means causing such elements "to be discharged from the device "together-r .Afurth'erandmore specificobject isto provide an improved impact tool by which a washerjlilte fastening ment will automatically 'beposi'tioned axially in the path .of the projectile fastening element prior to the moment when the latter is actuated by .the explosive discharging [Iorce'andwvhereby both fastening elements will thus leave the impact tool'together to be secured in desired relationship and in desired position on the concrete or masonry :wall. 4

The manner in which these objects and'oth'erincidental advantages are attained through our invention will'be explained inthe course of the followingdescription inwh'ich reference is made to theza'ccompanying drawings.

'In'the drawings:

Fig. l is"a perspective view'of the entire apparatus used in.carrying out our invention; p

. Fig. 2 is in part-a side elevation 'anrlinpart a longitudinal sectional elevation of the apparatus illustrating "the relative 'position of some of-the'partswhen the apparatus is in'the normal or inactive position; i v

T ig. 3 'is a corresponding elevation, partly insection, illustrating the relative position :of some ofithe parts when "the apparatus is positioned and setf-for operation;

Fig. t is a corresponding elevation, partly in section, showing theapparatus positioned and 'setifor operation;

Fig. 5 is a section on line 5-5 "of Fig. '2 showing-the normal "position of *t'he' lowe'rmost cylindricalwasher-like.

'lastenerwhenthe apparatus'is in inope'rati-ve-nositioni 2,702,902 Patented .Mar. .1 1955 Fig. 6 is a corresponding section on line 6-6 of Figs. 3 and 4 showing such cylindrical washer-like fastener positioned for engagement by the projectile 'in anticipation of the firing of the apparatus;

Fig. 7 is a section on line 7- 7 of 'Fig. '2;

Fig. '8 is a perspective view of one of the cylindrical Washer-like fasteners;

Fig. 9 is a perspectiveyiewof the removable magazine for the cylindrical washer-'likeiasteners;

Fig. 10 is a perspective'viewof the positioning member for the washer-like fasteners;

Fig. 11 is a fragmentary perspective :view of the muzzle end of the gun barrel portion of the apparatus on which the positioning member of Fig. I0 is mounted and by which it is actuated, and

Fig. 12 is a fragmentary .section'al elevation of a .concrete wall illustrating the top of a sack secured thereto by the cooperating "fastening elements dischargcdtromour apparatus.

Referring first to Figs. 1 to -4;inclusive, our apparatus comprises a gun-likedevice "which includes .:an outer hou sing or casting comprising a main cylindrical portion 10, an adjoining smaller substantially cylindricalpor'tion 11, a hollow flattened handle portion .12, .and muzzle end flange '13. A base casting "14 is attahedto thefflange '13 by suitable screws. A trigger "handle cap 15 "is movably mounted on the opposite 'end of the housing 10. .A "gun barrel member 16 is slidablyiand non-frotatively mounted in the'housing 10, this member-including "a forward gunbarrel portion '18 having an outer diameter substantially less than the interior diameterof the housing "10, and a rearward, enlarged breech portion I9 having an outer diameter approximately equal to the interior diameter of the housing It). H

The handle 12 functions in the usual manner as a cartridge magazine and the cartridges arefed into the breech portion 19 in the usual mannerhy Itlre'usual .bre'ech block or bolt havinga handle fitmovab'lethrough the usualsslot 36 in the housing 10. It will be iunderstood'jthat the ifeedi-ng o'f acartridge ,and-ejection'of ashell, wliiehformsno part of this .invention, is eifectedinithe sam'efgeneral manner as in the .ordinary breech-"boltfifie mechanism. It will also :be understood that .a cartridge loaded in the breech portion 19 may be'fired 'by movement -.o'f the trigice ,gerhandlecap 15 byanydesired mechanism, which dikewise .forms no part of theprcsentjnvention.

.Acoil spring 43 (Figs. 2 :and 3,) iszmounted on .thegunbarrel 18. One end .of ttherspring 313 hearsagainst rating 44 which is firmly secured on the ,gun barrl, :and the opposite end of the spring-43 bears against aperztured ring 45 through which the barrel may :slide which in .turn is engaged by :a substantially Isl-shaped retainer '46 mounted in .a slot in the housing '10 (see:"also;Fig. .1 land which extends inward-1y around zt-wo sides of the gunbarrel. Thus the spring 43 normally biases the housing and the gun-barrel longitudinally.relatively with respect to each other in the position illustrated :in Fig. .2, or with :the housing moved to the :left in its position -.with respect to the gun-barrelras viewed inEig; .2.

The housing section 1111 (Figs. T l to '4 inclusive) has a cylindrical interior which :leads into aichamber .14 :in the base casting 14. The opposite 'en'd of tthe i housing section 1-1 is open to receive .a :cylindricalrmagazine 4.7 (see also 'Fig. 9) in which :a supply-of washer-like fasteners '48 "(:aFigure 8) is carried. The purposeJ-df fthes'e washerdike taste'ners is to enable the-objects which are to be secured to the concrete wall or other surface in) he held overaTlarger area than that presented by the projectile hea'd itself. This is illustrated in Fig. 12 inwhi'dh it is assumed that the "top ofa 'sackS is "requiredto be secured on-a concrete wall W. The projectile P, "when discharged from the apparatus, passespar'tway throngh one of the 'washerlike fasteners &8 before becoming embedded in theco'ncrete. 'The washe-rdike fastener 48 and the projectile P combine in securing the sack in place' over a stifficien'tly large area to prevent any possibility of the sack sumavertently slipping o'lf from the projectile.

The magazine 47, as shown in Fig. 2, is, provided with a coil spring 49, one end dFwhlch-pres'sesagainst the closed top end 47' of the magazine- 47 and the other end of which engages a slidable pusher 50 which urges the washer-like fasteners 48 towards the discharging end of the magazine and into the chamber 14'. The top or closed end 47 of the magazine 47 has a pair of fingerhold flanges 51 (see Figs. 7 and 9) to aid in removing the magazine from housing 11 when the magazine needs refilling. A slidable detent 52 (Fig. 7) holds the magazine removably in place in housing 11. A longitudinal rib 53 on the magazine 47 engages a slot in the housing 11 so as to insure the proper setting of the magazine in place in the housing.

In order to hold the washer-like fasteners 48 in the magazine 47 when the magazine is being loaded and before it is set in place in the housing 11, a fiat spring 54 (Figs. 2 and 9) extends longitudinally over an open slot at the bottom of the magazine 47, and this spring 54 carries a knob 55 on its inner face, which knob is adapted to engage an annular groove in the lowermost washer-like fastener 48 in the magazine. However, when the magazine 47, with its supply of washer-like fasteners, is inserted in place in the housing 11, a wedge shaped finger 56 (Fig. 2) on the inner end of an arm at the bottom of the housing 11, engages the end of the flat spring 54 and presses it outwardly so that the knob 55 no longer engages a washer-like fastener 48 in the magazine. This permits the bottom washer-like fastener in the magazine to be pushed into the chamber 14' of the base cast ing 14 under the force of the pusher and coil spring 49. A small hole 57 (Figs. 3 and 4) in the housing 11 adjacent the base casting 14 and a registering hole (not shown) in the magazine 47, enable a portion of the pusher 50 (Fig. 2) to be seen when the supply of washer-like fasteners in the magazine 47 has been exhausted and the magazine needs refilling. A bright colored mark preferably is placed on a portion of the outside wall of the pusher 50 so that it may more easily be distinguished in the registering holes of magazine 47 and housing 11.

A spool-shaped washer-positioning member 59 (shown most clearly in Fig. 10 and also shown in Figs. 2, 3 and 5) is rotatably and slidably mounted on the muzzle end of the gun barrel 18. A stationary ring 60, secured in place on the interior wall of the housing (Figs. 2 and 3), prevents the member 59 from moving further inwardly within the housing 10. A spiral slot 61, extending along member 59, is engaged by a pin 62 (Fig. 11) on the gun barrel 18. As a result, longitudinal or axial movement of the housing 10 with respect to the gun barrel 18 produces partial rotation of the member 59.

A hook-shaped arm 63 is rigidly secured to the outer or bottom annular face of member 59 This arm 63 extends over and rides on a flat shoulder 64 in the chamber 14' of the base casting 14. The side wall of shoulder 64 is shaped as shown in Figs. 5 and 6 and is formed in a reverse curve, both parts of which have a radius of curvature corresponding to the radius of the washerlike fasteners 48. The height of the chamber 14 in the base casting 14 is approximately equal to the thickness of a washer-like fastener 48, and the height of the shoulder 64 is approximately half that of the chamber 14'. Thus as each Washer-like fastener 48 is delivered into chamber 14' from the magazine 47 it is engaged by the arm 63 when this arm is caused to move as a result of partial rotation of the member 59.

The base casting 14 has a circular outlet opening 65 (Figure 2) located in axial alignment with the cylindrical inner wall of the housing 10 and in axial alignment with the gun barrel, and this outlet opening 65 has a diameter slightly greater than the diameter of the washer-like fasteners 48. When the housing 10 is moved longitudinally on the gun barrel from the position of Fig. 2 to the position of Fig. 3, the movement of the housing and the member 59 with respect to the gun barrel produces partial rotation of the member 59 as previously explained, and causes the arm 63 to move from the position in Fig. 5 to the position in Fig. 6. In so doing the arm 63 moves a washer-like fastener 48 from its position as first delivered into chamber 14' from the magazine 47 (thus the position in Fig. 5) into registration with the outlet opening 65 in the base casting 14, whereupon the center hole 48' of the washer-like fastener will then be axially aligned with the bore of the gun barrel. A spring member 75 in chamber 14 aids in this positioning of the washer-like fastener and in bringing it into.

desired registration.

A push bar 66 (Figs. 1, 2, 3, 5 and 6) has its shank slidably mounted in a slot 72 (Fig. 2) -in the housing 10. A spring member 71, attached at one end to housing 10, covers the slot 72 and carries a pin 74 which engages a slot 73 in the push bar shank in order to limit the relative longitudinal movement of the push bar and housing with respect to each other. The enlarged end of the push bar 66 passes through a slot 68 (Fig. l) in the base casting 14, which slot extends along the outlet opening 65. A lip 67 on the push bar engages a notch 69 on the end of the gun barrel, and a notch 70 on member 59 accommodates the lips 67 when the housing 10, and with it the member 59, are moved from left to right (as viewed in Figure 2) on the gun barrel. Such movement of the housing 10 with respect to the gun barrel causes the gun barrel to be entirely out of the way when a washer-like fastener 48 is being moved into position at the muzzle end of the gun barrel.

At the start of operations, the housing and gun barrel are in the relative position illustrated in Figure 2, being normally held in this relative position by the spring 43. To load the apparatus, the breech-block is operated by its handle 31, like the breech-block of a rifle, to insert a cartridge into the breech portion 19. When the cartridge is loaded in the gun barrel, the next step in preparing the apparatus for firing is to thrust the housing forwardly or to the right with respect to the gun barrel against the force of spring 43. This is accomplished bv bringing the outer end of the push bar 66 against the object and the concrete wall, or other surface to which the object is to be secured, and thrusting the entire apparatus against such object and wall until the face of the base casting 14 rests against the object. This thrusting of the housing forwardly or to the right on the gun barrel brings the apparatus into the position illustrated in Fig. 3 and this movement of the housing with respect to the gun barrel simultaneously produces partial rotation of the member 59 as previously explained, and consequently causes a washer-like fastener 48 to be moved in position at the muzzle end of the gun barrel and into axial alignment with the bore of the gun barrel. Whilethe apparatus is held in this position, with the housing pressed forwardly against the force of spring 43, the trigger handle cap 15 is turned with respect to the housing and gun barrel so as to move a trigger hammer and permit it to drop on to the end of a firing pin and explode the cartridge.

An important feature of our apparatus is that it can not be fired until the housing is thrust forwardly on the gun barrel by having the push bar 66 and outer face of the base casting 14 pressed against the object to be secured and can not be fired until such thrusting of the housing forwardly has automatically caused one of the washer-like fasteners 48 from the magazine to be set in position in the path of the projectile to be discharged.

The washer-like fasteners 48 which we employ are preferably approximately /2 inch in thickness, although of course fasteners of other thicknesses could be used provided corresponding modification is made in our device. The center hole 48' in these Washer-like fasteners is made smaller than the head of the projectile, as shown, in order that the head of the projectile can not pass entirely through the fastener but will become embedded in the fastener in the manner shown in Fig. 12. We have found it very satisfactory to make these washer-like fasteners of aluminum since such aluminum fasteners are light in weight and when made in the thickness suggested will cause the projectile to stop when the head of the projectile has passed approximately half way through the fastener. As a result, an article to be secured to the concrete will be held firmly on the projectile and tightly pressed between the concrete surface and the cooperating washerlike fastener.

Various modifications could be made in the washer like fasteners which we employ and in the projectiles and also in the separate parts of our apparatus without departing from the principle of our invention, and it is not our intention to limit the invention otherwise than as set forth in the claims.

While we have described our device as employed for the purpose of attaching objects, such for example as sacks containing demolition charges, to concrete, and the principal uses of our device will be in instances when concrete is the material to which objects are to be attached, our invention is of course not limited to such use. Our

device may be employed similarly for attaching objects to wood, such as wooden piers, and to other materials softer than concrete. The relatively thick washer-like fasteners are additionally important when articles are to be attached to a softer medium such as wood. The explosivelyactuated projectile, without the washer-like fastener, would in all probability become so deeply embedded in the wood that the head of the projectile would be sunk below the surface of the wood and be useless as a fastening means. The thick washer-like fastener however prevents this and keeps the head of the projectile from passing into the wood.

We claim:

1. In a device of the character described for securing a washer-like fastening element to a mass of material by an explosively-driven projectile, a housing having a main channel, a gun barrel in said housing channel, a compartment on said housing for a plurality of said washerlike elements, a chamber on the end of said housing extending over the end of said channel and opening into said compartment, the outer wall of said chamber having a discharge opening in axial alignment with said channel, said housing being mounted for limited sliding movement on said gun barrel with the gun barrel muzzle extending through said chamber and discharge opening when said housing is in normal position at one extreme of its movement with respect to said gun barrel and with said chamber positioned beyond the gun barrel muzzle at the other extreme of its movement with respect to said gun barrel, said discharge opening being of slightly greater diameter than said washer-like elements, spring means for holding said housing in normal position with respect to said gun barrel, a gun barrel-engaging bar extending through said outer wall of said chamber and extending beyond the muzzle end of said gun barrel and so arranged and mounted that when the outer end of said bar is pressed against a surface said housing can be pushed forwardly on said gun barrel against the force of said spring means until said chamber is positioned beyond the muzzle end of said gun barrel, and means in said chamber actuated by said forward movement of said housing with respect to said gun barrel for automatically moving one of said washer-like elements into position over said muzzle end and in axial alignment therewith so as to cause said washer-like element to be engaged by the explosivelydriven projectile when the device is fired.

2. In a device of the character described for securing a washer-like fastening element to a mass of material by an explosively-driven projectile, a housing having a main channel, a gun barrel in said channel, a magazine on said housing for supporting a plurality of the washer-like elements, a compartment in said housing and in communication with said magazine, a chamber on the end of said housing extending over the end of said channel and opening into said compartment, a discharge opening in the outer wall of said chamber in axial alignment'with said channel, said housing being mounted for limited sliding movement on said gun barrel with the gun barrel muzzle extending through said chamber and discharge opening when said housing is in normal position at one extreme of its movement with respect to said gun barrel and with said chamber positioned beyond the gun barrel muzzle at the other extreme of its movement with respect to said gun barrel, said discharge opening being of slightly greater diameter than said washer-like elements, spring means for holding said housing in said normal position with respect to said gun barrel, means connected with said gun barrel and enabling said housing to be moved forwardly with respect to said gun barrel against the force of said spring means until said chamber is positioned beyond said muzzle end, and means in said chamber actuated by said movement of said housing with respect to said gun barrel for automatically moving one of said washer-like elements into position over said muzzle end and in axial alignment therewith so as to cause said washer-like element to be engaged by the explosively-driven projectile when the device is fired.

3. Ina device of the character described for securing a washer-like fastening element to a mass of material by an explosively-driven projectile, a housing having a main channel, a gun barrel in said channel, a compartment in said housing for a plurality of said washer-like elements, a chamber on the end of said housing extending over the end of said channel and opening into said compartment, a discharge opening in the outer wall of said chamber and in axial alignment with said channel, said housing being mounted for limited sliding movement on said gun barrel with the gun barrel muzzle extending through said chamber and discharge opening when said housing is in normal position on said gun barrel, means enabling said gun barrel to be held against forward movement when said housing is slid forwardly on said gun barrel until said chamber is positioned beyond said muzzle end, and means in said chamber actuated by said forward movement of said housing on said gun barrel for automatically moving one of said washer-like elements intoposition over said muzzle end and in axial alignment therewith so as to cause said washer-like element to be engaged by the explosively-driven projectile when the device is fired.

4. In a device of the character described for securing a washer-like fastening element to a mass of material by an explosively-driven projectile, a. housing, a gun barrel in said housing, said housing and said gun barrel being longitudinally movable relatively to each other to a limited extent, a compartment in said housing for a plurality of said washer-like elements, a chamber on the end of said housing and opening into said compartment, a discharge opening in the outer wall of said chamber, the muzzle end of said gun barrel extending through said chamber and discharge opening when said housing and said gun barrel are in their normal position with respect to each other, means enabling said housing and said gun barrel to be moved relatively with respect to each other until said chamber is positioned beyond said muzzle end, and means in said chamber actuated by said relative movement of said housing with respect to said gun barrel for automatically moving one of said washer-like elements into position in front of said muzzle end and ,in axial alignment therewith so as to cause said washer-like element to be engaged by the explosively-driven projectile when the device is fired.

5. In a device of the character described for securing a washer-like fastening element to a mass of material by an explosively-driven projectile, a gun barrel, a housing mounted for limited axial movement from normal into forward extended position on said gun barrel, means on said housing for supporting said washer-like element, and means in said housing and actuated by the movement relative to the gun barrel of said housing into said forward extended position for automatically moving said washerlike element into position over the muzzle end of said gun barrel and in axial alignment therewith so as to cause said Washer-like element to be engaged by the explosively-driven projectile when the device is fired.

References Cited in the file of this patent UNITED STATES PATENTS 2,395,354 Temple Feb. 19, 1946

Images