US2420905A

US2420905A - Drill sampling device

Info

Publication number: US2420905A
Application number: US487449A
Authority: US
Inventors: Olsen Thue Christian
Original assignee: American Smelting and Refining Co
Current assignee: American Smelting and Refining Co
Priority date: 1943-05-18
Filing date: 1943-05-18
Publication date: 1947-05-20
Anticipated expiration: 1964-05-20

Description

May 20, 1947. T. c. OLSEN DRILL SAMPLING DEVICE Filed May 18, 1943 2 Sheets-Sheet l INVENTOR.

Time dknlsiz'an filial ITTOFNE) May 20, 1947. 1-. c. OLSEN L DRILL SAMPLING DEVICE 2 Sheets-Sheet 2 Filed May 18, 1943 INVENTOR. 77a: fink/{an Uben BY I arrow/v5) atente ay20, 1947 s'm'r DRILL SLING DEWGE Application May 18, 1943, Serial No. 4873 3 Claims.

This invention relates to sampling devices and more particularly to an attachment for drill sampling machines which is operable to collect the borlngs and provide suitable protection to the operator against injury caused by flying pieces of metal during the drilling operation. The invention is illustrated and described in connection with the drill sampling of metallic substances for assay purposes, however, the utility of the invention is not limited to this specific application as will be obvious from the following description.

In drill sampling metallurgical products, such as cakes of copper, pig-iron, bullion, ingots and drilled at several points scattered over its surface and the borings taken to provide a composite sample which may be representative of an entire lot or shipment. This drilling and collection of the sample borings, as heretofore practiced, is a rather tedious and time consuming operation and no special provision is made to safeguard the operator against injury from flying metal. Accordingly, it' is theprincipal object of the present invention to provide a drill sampling device which is operable to automatically gather the drillings and deposit them in a receptacle while thoroughly safeguarding the operator against injury resulting from breakage of the tool bit, or the like, while operating the'drill.

Another object is to provide a mechanism which may be readily attached to a drill sampling machine and operated to pick up the borings as they are formed and transfer them to a suitable receptacle or container.

A further object is to provide an apparatus of means being broken away to show the interior construction and provision for separating the borings from the air stream;

Fig. 2 is a view in elevation of the inverted suction cup and guard means associated with the drill bit and attached to the spindle sleeve of the drilling machine and shown partly broken away, the cup means being illustrated in its lowermost position;

the like, each cake or slab of metal is generally the character described which combines a boring bodiment of the invention is given for thepurpose of illustration.

In the drawings: Fig. 1 illustrates diagrammatically in elevation a turrettype radial drill press as used for drill sampling copper cakes, anodes and the like, which is shown equipped with the sample collecting mechanism of the invention; the receptacle tiii Fig. 3 is a vertical section view taken on the line 3-3 of Fig. 2 and looking in the direction of the arrows;

Fig. 4 is a fragmentary detail view in section taken substantially on the line H of Fig. 2 and looking in the direction of the arrows, a portion of the guard member being broken away to Referring to the drawings in detail, particularly Fig. 1, the numeral it designates a turret-type radial drilling machine having a horizontallydisposed arm member it which is pivotally supported on the column ii. A motor actuated drilling mechanism which is shown diagrammatically at I3 is slidably'mounted on the arm member ii and is adjustable so that the drill bit It can be positioned to make vertical borings at one or more places, scattered over the surface area of the billet or slab, such as generally indicated by the reference character i5, which is suitably sup- I ported on the work table it. Vertical movement and feed control of the drill bit is provided for in the usual way, for example, by mounting the drill bit spindle sleeve member ii on a verticallymovable support which is arranged to be raised or lowered by suitable gearing, not shown, opersnigively connected to the handwheel lever means The attachment for collecting the drillings, which is the subject matter of the present invention, comprises an inverted cup-shaped means it and communicating suction conduit 28. As shown in Figs, 3 and 5, a centrally located aperture 22 in the inverted base portion 23 of the cup member is provided to allow for passage of the drill bit it. The open end of the cup means 2b is adapted to engage the surface of the billet or slab of metal to be drilled, as shown in Figs,

3. 2, 3 and 5, and form a closure about the lower end of the drill bit confining the bdrings so that they are readily picked up and conveyed away through the conduit 2| by the stream of air drawn into the cup 20 by the application of suction to pipe 2 i A yieldable contacting member 24, which is preferably made of leather, rubber, sponge rubher, or like flexible material, is secured to the outer side walls of the cup by suitable means,

such as by screws 25, to provide a depending portion 28 for yieldingly engaging the surface of the material being drill sampled. The suction conduit '2l communicates with the inner chamber of the suction cup 20 through a throat means 2? formed by flattening the top and bottom portions of the conduit as illustrated in Figs. 2 and 5.

A flap member 28, made, of rubber, leather, or like flexible substance, is secured to the underside wall of the conduit in such a manner as to form a restricted air gap 30 between theflap and sur. face .of the material being sampled. Preferably, the flap member 28 extends beyond the end of the under wall portion of theconduit 2 i, as shown pressure when suction is applied to the conduit directing a. sweeping blast of air about the drill bit as it rotates whereby the borings 32, which are expelled by the bit, are swept away through the conduit 2| into the receptacle 33, the latter being preferably mounted on the arm means Ii of the drill press as illustrated in Fig. 1. This receptacle, however, may be mounted on the movable drill press mechanism l3 .or an independently movable support, as desired. I

A cylindrical safeguard means is mounted on the triangular base 38 to which the inverted suction cup means 20 is secured. A central aperture 31 in the base 36 registers with the opening 22 in the suction cup-base portion 23 and accommodates passage of the drill bit 14. Angie members 38 welded or otherwise fastened to the lower part of the cylindrical guard are provided for securing the guard to the base 36, as illustrated in Figs. 3 and 4. The guard may be made of metal having screen covered openings 88, or, if desired, it may be formed of transparent plastic material or the like, whereby the operation of the drill can be viewed withsafety. a

The drill bit guard and suction cup mechanism is supported for vertical movement independently of the drill bit, as shown in Figs. 2 and 3, by the rods 40 which are attached at their lower ends to the base 36. Rods 40 are each slidably retained in a guide portion 4| formed on the lower ends of'the-straps 42 arranged at opposite sides of the guard 35, as illustrated in Figs. 2 and 3. The mechanism is adiustably clamped to the spindle sleeve ll of the drilling machine by a collar anism is raised and retain the same in its uppermost position until it is disengaged therefrom by the operator.

To provide a wear-resistant material for limiting the opening 31 through which the drill bit i4 passes, a suitably hardened piece of metal 5!, having a central aperture of suflicient size to permit free passage of the drill bit, is mounted on the base member 38, as illustrated in Figs. 3 and 5. By this provision the openingal'l is prevented from becoming-enlarged by movement of the rotating bit therethrough while sufficiently limitin the opening so that. most of the air flows through the gap 30 located beneath the suction cup as heretofore described.

A flexible hose means 53 is preferably utilized to connect the conduit 2| to the inlet pipe sec tion oi the receptacle 33. Suction is applied to the hose and attached conduit 2! by a suitin Fig. 5 so that it will be flexed upwardly by air able motor-actuated blower means,iwhich may be of conventional construction, and generally indicated at on Fig. 1. This blower means is preferably arranged on the lid portion so of the receptacle 33 and'a gas-permeable membrane 5i, made of cloth, fine mesh metal screen, or the like, is positioned in the upper part of the receptacle to filter out the borings which are carried to the receptacle by the air stream. These drillings, forming a sample of the material, are deposited in the bottom portion of the receptacle and the air is drawn through the membrane 51, as indicated by the arrows in Fig. 1. After the air has passed from the membrane to the blower, it is discharged outwardly through vent pipe 58. A

perforated skirt member 59 attached to the lid 56 suitably supports the membrane 51 away from the lid while the periphery portion of the membrane is held clamped between the lid 56 and rim means 61 of the-receptacle, the blower and associated mechanism being removably clamped onto the receptacle by the winged-type hinged bolt construction, such as is illustrated in Fig. 1.

In use a common electrical switch mean may be employed for controlling the operation of both the drillingmeans i4 and suction creating mechaever, the sample drillings are collected. in the 44 to which thestraps 42 are welded or otherwise rigidly attached. A bolt 4! is utilized to secure the collar 44 to the spindle as shown in Fig. 2.

The rods 40 are prevented from sliding out of the g de members 4i by suitable pinmeans 4G ailixedontheendsoftherodsasillustratedin Fi 3. A handle member 41,- attached to the base means 38, is provided for assisting the operator in manually raising or lowering the mechanism about the drill bit. For releasably fasten.

ing the mechanism in its raised position. a suitable latch ineans '48, having a finger operable release member 49, is pivotally attached to the inner side of one of the guide members, as shown in Fig.-3. The hook' portion It is adapted to receptacle provided and when the desired amount of-sample borings have been obtained, the receptacle and interconnecting hose means 53 are removed and cleaned of borings in order to avoid any possible intermixing of samples.

It will be apparent from the foregoing description that the sweeping up of the boringsby air flow may be accomplished by blowing air into the cup means 20 instead of sucking the air I therein by vacuum-creating means. Such modification is illustrated in Fig. 6, wherein a blower 65, as shown, is suitably fastened to the underside wall of the pipe 2I, and arranged'to force air into the interior of the cup 20 and outwardly through the pipe 2! to receptacle 33. Further, it will be obvious that the sample particles may be produced by other means functioning in like manner as adrill, for example, by utilizing a gouging, sawing or abrading means which is arranged to operate similarly asthe drill illustrated. Such modifications are contemplated as coming engage under the base member 86 when the mechwithin the scope of the present invention,

While certain. features of the invention have been disclosed. and. are pointed out in the: annexed claims, it. will be understood that various owl's-- sions, substitutions: and changes: may be made by those skilled in. the art without departing; from. the.- spirit of the invention.

What; is claimed is: p 1. A. sampling device of the character described comprising boring mechanism, means for sup-- porting material to be bored, means comprising a. suction cup operatively associated with said boring" mechanism, said suction cup means being shaped as: an inverted cup and having a. yieldable wall portion for engaging the surface of the material to be sample drilled, a tube connected to drill bit, means for moving said drill bit into sweep up the drillings and convey them to said receptacle, said receptacle and connecting conduit; being; readily removable.- ior cleaning and recovering sample drillings after each. drill sampling, operation.

3.v In a sampling device of the character described: a. vertically reciprocable drill bit rotatable in contact with material from which sample borings are tobe taken, an inverted cup-like means movable vertically independent of said drill bit and yieldably engageable during sampling with the surface of the material being sampled to form a closure around the shank of the drill bit and to confine the borlngs on the surface area enclosed until they are picked up and conveyed away, a conduit communicating with said closure and connected to a receptacle, a passageway beneath said closure for admitting a aseous stream thereinto, and means for causing a gaseous stream to flow through said passageway into the closure over the surface of the material adjacent the contact with the material which is to be drill sampled, means for rotating said drill bit to make borings in said material, an inverted cup member operatively associated with said drill bit arranged flow through said closure and conduit and about said drill bit during the drilling operation to drill bit and through said conduit to thereceptacle during the boring operation to sweep up the,

borings and convey them to said receptacle for collection. I

THUE CHRISTIAN OLSEN.

REFERENCES crran The following references are of record in the Great Britain Mar. 1, 1917