US847269A - Sand-blast apparatus. - Google Patents

Description

PATENTED MAR. 12, 1907.

F. M. WISE.

SAND BLAST APPARATUS. APPLICATION FILED NOT/110.1906.

2 SHEETS-SHEET 1.

Guam;

No. 847,269. PATENTED MAR. 12, 1907.

' F. M. WISE, SAND BLAST APPARATUS.

APPLICATION FILED NOV.10, 1905.

2 SHEETS-SHEET 2.

UNITED STATES FRANKLYN M. WISE, or NEW YORK,

, NEW YORK. A

SAND-BLAST APP-ARATUS.

PATENT oEEioE.

N. Y.,ASS1GNOR TOIAMERIOAN pm MOND BLAST COMPANY, on NEW YORK, N. Y., A- OORPORATIONOF Specification of Letters Patent.

Patented March 12, 1907.

Application filed November'lO, 1906. Serial No. 236,632.

borough of Manhattan, city, county, and

State of New York, have invented certain. new and useful Improvements in Sand-Blast Apparatus, of which the following is a speci fication.

My invention relates to improvements in sand-blast machines of that class particularly adapted for cleaning the surfaces of stone, metal, wood, &c., and has as its object the providing of means for collecting and returning the sand used to the sand-reservoir .my invention.

in connection with means for facilitating the operation of the various parts.

In the following I have described, in connection with the acompanying drawings, one form of device illustrating my invention, the. features thereof being more particularly pointed out hereinafter in the claims.

- In the drawings, Figure 1 is a side elevation, partly in section, of a portable sandblast machine, illustrating one application of Fig. 2 is a plan view of the sand-reservoir shown in Fig. 1 and its connections, parts being broken away. Fig. 3 is an enlarged cross-sectional view on the line A B of Fig. 1 and looking in the direction of the arrows, a'ndFig. 4 is a front elevation of the sand-collector.

Similar numerals of reference indicate similar parts throughout the several views.

1 designates a sand-reservoir comprising a cylinder, preferably of metal, mounted on abase 2, suitably supported and provided i -with a concave or hopper-shaped bottom 3 7 avalve 11.

and a top or cover 4. Access to the reservoir in order to replenish it with sand is provided for by means of a hopper 5, said hopper having an air-tight cover comprising a rubber gasket 6, with which twocover members 7 and 8 are adapted to engage by means of an expanding-screw 9 to form an air-tight o1nt. A

10 is an inlet-pipe through which the air under pressure is forced into the sand-reservoir, said pipe being controlled by means of A U-shaped bend 12, having a draw-off petcock 13, is provided in the airinlet pipe to collect such moisture as'may be in theair before it reaches thesand-reservoir. 14 is a tube preferably extending vertically through the sand-reservoir and centrally located with relation thereto and projecting through suitable openings in the bottom 3 and cover 4. Near the lower end of tube 14 and 'just above the bottom 3 of the sandreservoir a series of vertically-arranged a ertures 15 are provided, through which t e sand may pass into the mixing-chamber 16 at the lower extremity of .tube 14. To regu-.

late the admission of said to the mixing. chamber, tube 1 4 is provided with a vertically- ,adjustable valve, said valve comprising a stem 17-, having at its upper end a handwheel 18 and at its lower end a head or plunger 19, adapted to close apertures 15 when the valve is seated. The stem 17 has an enlarged threaded portion 20, which passes through a suitable stuffing-box 21 in tube 14, the parts being so arranged that by turning hand-Wheel 18 the valve is raised and lowered, as desired, opening moreor less of apertures 15 and permitting more or less sand to escape into the mixing-chamber.

Tube 14 at its upper end and a little below the cover 4 of the sand-reservoir is rovided with a ertures 22 ofsuch diameter t at they will a mit sufiicient air into the sand-res: ervoir to tend to force the sand contained therein downward, but not suflicient to counteract the suction of air from the sand-suction means, as hereinafter described.

The mixing-chamber 16 tapers, as at 23, to

form a threadednipple 24, said nipple being A adapted to receive the end ofhose 25, which is adapted to convey air and sand to the object to be operated upon, suchas wall 26.

A gage or sight is provided at one side of the sand-reservoir 1 in order to observe the contents thereof and comprising ano ening 27 in the side of the reservoir, covere by a strip of sheet-mica 28, and a late-glass member 29, clamped tothe side of the reser voir by agrooved plate 30 and rivets 31, a rubber gasket 32 being interposed between theplate 30 and the side edges of sheet '28 and glass 29, as shown in Fig. 3, in order to renliler the opening 27 into the reservoir airti t. e

At one side of the reservoir is mounted a sand-suction means comprising acylinder 33, preferably of metal and having a de flector-pl'ate 34, dividingcylinder 33 into two chambers 35 and 36, respectively. Chamber 1 provided with an air-inlet pipe 37, and cham er 36 is provided with two air-outlets 11 is opened and air under suitable pressure.

38 and 39, respectively-one near the top and the other near the bottom of said chamber.

Air-outlets 38 and 39 dischargeinto a suction- 42 discharges and W ich in turn discharges into pipe 43, coupled withhose 44, leading into the sand-reservoir. Pipe 42. at its lower end is coupled with hose 45, which is coupled at its outer end to a sand-collector 46, comprising a frame covered with any suitable material, preferably stiiiened canvas, hopper-shaped at the bottom, as at 47, and having a hood ordeflector 48 at the to Wheels 49 are provided to assist in readi y moving the collector over the wall 26.

Thecollector 46 is supported onnozzle 50 at the outer end ofhose 25 by means of a suitable slip-ring 51. Nozzle 50 is preferably provided with handles 52 and adetachable nose 53.Hoses 25 and 45 may be confined in the same position relative to each other by means of ring-clamps 54. Air-inlet pipe 37 is controllable by means of a suitable valve 55. v

The operation of the device is as follows: The reservoir having been filled with sand and the cover of hopper 5 being closed, valve is permitted to pass into the reservoir and into tube 14. Hand-wheel 18 is now turned so as to raise plunger 19 and open one or more of apertures 15-, through which the sand will flow into the mixing-chamber 16, assisted by the air-pressure in the reservoir. The sand passing into the mixingchamber is caught by the air passingldown through tube 14, carried through hose 2'5, andforci bly projected against the face of wall 26. Valve 55 being opened, air under pressure, preferably slightly less than the pressure in air-inlet pipe 10, is permitted to enter chamber 35, whence it passes over deflector-plate 34 and out through outlets '38 and 39 into suction chamber 40, where it creates a strong suction on pipe 42 and auxiliary suc-' tion-pipe 41, tending to suck the sand fromcollector 46, into which the sand falls after being projected against wall 26, back into the reservoir. This latter operation is generally assisted by g avity, as thedischargenozzle 50 andcollector 46 are'frequently in use at a level higher than the reservoir. By the means described little sand is lost, and the -machine may be used a considerable length of time without replenishing, involving very considerable economies in. operation, as well as great convenience -in mam ulation.

t is obvious that the arrangement described may be considerably varied from Without departing from the spirit of my invention, and I donot restrict myself toany of the details shown.

What I claim, and desire to secure by Letters Patent, is p F 1. In an apparatus of the character described the combination of a portable-sandreservoir, a sand-discharge pipe, air-compression means for drivmgthe sand from the reservoir through said pipe, means for collectingand retaining the sand discharged'from said p'pe and means for automatically return' ing the sand to the reservoir.

2. in an apparatus of the character described the combination of a portable sandreservoir, a sand-discharge pipe, air-compressi on means for driving the sand from the reservoir through said pipe, means .for collect- I ing and retaining the sand discharged from said pipe and suction means for automatically returning the sand to the reservoir.

3. .In an apparatus of the character described the combination of a portable sandreservoir, a sand-discharge pipe, air-compression means for drivin the sand from the.

reservoir through said pipe, collecting" and retaining means mounted on said pipe for collecting and retaining the sand discharged therefrom and means for automatically returning the sand from the collector to the reservoir.

4. In an apparatus of the character described a sand-suction means com rising a cylinder divided into a plurality of c ambcrs, one of said chambers forming (man-inlet and another an air-outlet, means for deflecting air from one chamber into another and a suction chamber into which the air-outlet chamber discharges. 5. In an apparatus of the character described a sand-suction means comprising a cylinder divided into a plurality of 0 one of said chambers forming an air-inlet and another anair-outlet, means for deflecting air from one chamber-into another, a suction-chamber into which the air-outlet chamber discharges, an. auxiliary suction-pipe in ambers,

said suction-chamber'and means discharging into and from said auxiliary suctionrpipe.

6. An apparatus-of the characterdescribed including a portable sand-reservoir comprising a primary mixing-chamber, a secondary mixingchamber, air-compression means connected therewith, a sand-discharge pipe connected thereto, a discharge-nozzle on said sand-discharge pipe, and means mounted on said discharge-nozzle for collecting and retaining the sand dischargedtherefrom.

7. An apparatus of the character described including a portable sand-reservoir comprisng a primary mixing-chamber, asecondary I mixing-chamber, air-compression means con- 7 nected therewith, a sand-discharge pipe connected thereto, a discharge-nozzle on said discharge-pi e, means mounted on said discharge-nozz e for collecting and retaining the sand discharged therefrom, and means for i thereof. v p

10. An apparatus of the character deautomatically exhausting the said collecting and retaining means. L

8. An apparatus of the character described for collecting and retaining the means for auto charge-nozz matically exhausting sand to the primary mixing-chamber.

including a sand collecting and retaining -means comprising a hopper providedwith'a and a receiver adapted to surround a discharge-nozzle mounted on a sanddischarge pipe, and means for automatically e'xhaustmg said receiver of the contents scribed including a sand collecting and re- 2 5 taining means comprisinga hopper provided with a deflector-hood and a receiver adapted to surround adischargemozzl-e mounted on asand-discharge pipe, means for automatically exhausting said receiver of the cono tents thereof and means for returning the .contents to the main su plyf '11. apparatus 0 the character de- 9. An apparatus of the character describedscribed including a sand collecting and retaining means compris' a hopper provided with a deflector-hood an a receiver adapted to surround a discharge-nozzle mounted on a sand-discharge pipe, means for automatically exhausting said receiver of the contents thereof, means for returning said contents to the main supply, and means mounted on said collecting and retaining means for rendering the same easy to handle.

12-. An apparatus of the character described including a portable sand-reservoir adapted tobe filled solid with sand, a means for observing the contents thereof comprising a metal frame having mounted thereln a sheet of mica said metal frame and sheet of mica being suitably fastened to the casing of said sand-reservoir. V

13. An apparatus of the character described including a sand-discharge nozzle comprising a reception member, handles mounted thereon, body of asand collector and retainer and a detachable nose-piece.

In witness whereof I have hereunto signed my name in the presence of two subscribing witnesses.

FRANKLYN M. WrsE. Witnesses VMAX. S. HAMBURGER, WILLIAM F. AsnLnY, Jr.

means for receiving the

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