US1324834A - oe detroit - Google Patents

Description

A. L. LUMBY.

SAFETY DEVICE.

APPLICAHON FILED NOV.24. 1916.

2 SHEETS-SH I.

anventd attain:

A. L. LUMBY.

SAFETY DEVICE.

APPLICAHON FILED Nov. 24,1916.

Patented Dec. 16,1919:

2 SHEETS-SHEET 2.

AVERY L. LUMBY, or DETROIT, MICHIGAN, AssIcNoaTo oAmiLLAo Moron can I COMPANY, OF DETROIT, MICHIGAN, A CQRPORATION'OF MICHIGAN.

SAFETY DEVICE.

Specification of Letti-irs Patent. Patented Dec, 16, 1919.

3 Application filed November 24, 1916. Serial No. 133,281. 7

To all whom it may concern:

Be it known that I, AVERY L. LUMBY, a citizen of the United States, and resident of Detroit, Wayne county, State of Michigan, have invented certain new and useful Improvements in Safety Devices, of which the following is a specification.

This invention relates to safety devices and more particularly to sand blasting ap paratus. Q

Considerable attention has been directed to the operation of devices for sand blast; ing metallic articles, with the result. that the menace to the health of sand blast operators has been generally recognized. Nu-* merous expedlents and devices for the'pro- 1760131011 of the operator, such as respirators,

various types of hoods and head dresses have been tried, but all have proved either impracticable or Some of these devices may offer partial protection, but observations of the usual practice of sand blast operators disclose that previous devices are either so uncomfortable'or so unsatisfactory that the operators frequently pass unprotected through the blastmg rooms, subjecting their lungs to the sand.

and dust laden air.

Therefore, one of the objects of this invention is to overcome the disadvantages accom-.

process is carried on, or he may protect himself by a suitable properly ventilated head dress or cloak. With my arrangement the operator may then observe the work through i a piece of gauze, the vision of which is kept clear of'dust and sand by a circulatlon of air through the gauze. The various objects and arrangements will clearly appear from the following description taken in connection with the accompanying drawings, which form a part of this specification, and: in which:

Figure 1 is a front elevation, with por tions broken away, of-a sand blasting chamber provided witha preferred form of my invention totally unsatisfactory.

provided with a suitable cone shaped sheet] metal bottom 14, and a similarly constructed top 15. The end walls and rear side wall may be of any well known sheet metal panel construction. One endofthe chamber may be provided with a swinging door 16, suit ably hung on a'stud 17 as by hinges 18, and

maintained closed by a lock19. The articles 1 which are to be sand blasted maybe'introduced'into the chamber through an end door and supported on a grating bar 20, arrangedhorizontally across the lower portion of the chamber.

It will be noted'that the top 15, of the chamber is provided with a. flue 21, which may befconnected with any well known means for producing a suction draft within the chamber for keeping the chamber free from dust and grit laden air.

The front wall of the chamber consists of.

metallic bars or straps '22, suitably secured 1 adjacent their upper and lower ends as by rivets22, toa header 13, and sill 12, respectively. Sheet metal panels 23, may be suit: ably secured as by IlVQtS 24, between opposite studs 11', bars 22, sills 12, and headers 13, leaving an opening 25, between the inner ends ofthe panels 23. A sliding door is arranged across the opening 25, comprising a cross member 26, and spaced sliding panels 27. Suitable hangers 28, and pulleys 29, which are arranged at the opposite ends of the cross member 26, are adapted to support the'sliding door on rails 30, which are secured as by bolts to the front header 13. A curtain or flexible'cover 31, preferably of canvas, may be provided with a loop 32, and hungfrom the cross member 26.

.The curtain31 has arranged therein, a cloak portion or apron 33, having arm sleeves 34, and. ahead dress or hood 35.v The front portion of the hood is provided with an aperture 86, across which may be suitably arranged a piece of gauze 37 which forms a screen. A metal dome plate 38, and head piece 89, may be suitably secured as by rivets 40, to the hood 35. A head shield etl, having a neck protector a2, is adapted to be secured as by rivets d3, to the rear portion of the head piece 39. 1

It will be noted that the head and neck protector extends partially across the rear opening l i. of the hood 35. A weight do, pulley a6, and a rope ll, which is secured to the hood 35, are adapted to take up an 1 slack in the curtain 31, with various movements of the operator. A bar, or weight 48, may be inserted in the bottom loop 4.9, of the apron of the cloalr for preventing the flapping of its lower portion. A sand blast nozzle 50, is suitably connected to an air hose 51, and a sand hose 52. It will be noted that the hose 52 is fed from a poclret formed in the bottom 14 of the chamber.

It will be noted from the foregoing description that the operator may slip his head under the piece 39, forwardly of the protectors ll and d2, so that he may have an unobstructed view of the interior of the chamber through the gauze 37. With a. partial vacuum, existing within the chamber by the action of the line 21, there will be a com stant circulation of air entering through the; rear opening 14 0;? the hood and passing outwardly through the gauze 87, the operator thereby being continually supplied with fresh air, and the gauze being maintained constantly free from dust and grit by the same circulation. The members ll and 42, protect the back of the operators head and neck from the incoming draft of air.

Vfith my apparatus the operator. is practically outside of the sand blasting chamber, except for his hands, and he is at the same time in a position to observe the results of his work without subjecting himself to the flying particles or" dust and sand. It will also be noted that there will be a constant circulation of air through the cloak 33 and the sleeves 34, thus providing comfortable conditions for the operator-while wearing the same.

While I have described and will specifically claim what I deem to be a preferred embodiment of my invention, it will be obvious to those skilledin the art that various changes and modifications may be made without departing from the spirit and scope hereof.

Having thus described my invention, what claim and desire to secure by Letters atent is:

1. In device of the class described, a flexible curtain having an operators head lress provided with afrout opening and (l a rear opening, the rear opening adapted to be norm ally unrestricted, and. the front opening being provided with a piece of gauze, and a shield for the back and the side of the operators head and which shield is arranged forwardly of said rear opening.

In a device of the class described and in combination with an inclosed chamber provided with an opening in one of its sides, of a flexible curtain for closing said opening, and which curtain is provided with an aperture; a piece of gauze covering said aperture; and means for circulating air from the exterior of said chamber to the interior thereof through said gauze, as and for the purpose set forth.

3. In a device of the class described, the combination with an inclosed chamber provided with an aperture in one of its sides, a flexible material for covering. said aperture, said flexible material being provided with an observation aperture, of a piece of gauze for. covering said latter aperture, means for circulating air from the exterior of said chamber to the interior thereof through said latter aperture, and sleeves carried by said flexible material and through which the arms of an operator may be thrust into the said chamber.

4. In a device of the class described, the combination with an inclosed chamber provided with a lateral opening, a lateral panel of flexible material extending across said opening and provided with an observation aperture and having a piece of gauze over said aperture, means for dischargmg air from said chamber whereby air is drawn from the exterior of said chamber through said aperture, and an opening in said flexible material through which the hand of the operator may be thrust into the chamber.

5. In a device of the class described and incombination with an inclosed work chamber provided with a lateral opening in which an operator may be located; a flexible curtain extending across said opening and having a cloak and head dress for protecting the operator, said head dress being provided with front. and rear openings; a gauze for covering said front opening and means for withdrawing air from the interior of said chamber.

6. In a device of the class described, the combination with an inclosed work chamber provided with a lateral opening in which an operator may be located, a flexible curtain extending across said opening, and which curtain is provided with a cloak and head dress for protecting the operator; said head dress having front and rear openings and said front opening having a. gauze covering extending across the same; and a shield extending upwardly from the cloak to the top of said head dress for protecting the back of the head and of the neck of the operator.

7. In a device of the class described, the combination with an inclosed work chamber provided With a lateral opening in which an operator may be located, of a flexible member extending across said opening and having cloak and head dress members for protecting the operator and said head dress being provided With front and rear openings; a gauze for covering said front opening; and means for causing a flow of air to occur from outside said chamber into said head-dress through said rearopening, and out from said head dress through said front opening and into the interior of said chamber.

8. In a device of the-c1ass'described, the

combination with an inclosed Work chamber provided With a lateral opening; a flexible curtain extending across said opening, said curtain having an observation aperture over which is arranged a piece of gauze, and having also additional apertures through Which the operators arms may extend into the interior of said chamber, the entire arrange- V ment being such that the operator may observe the interior of said chamber hile exteriorly thereof; and means for maintaining a circulation of air into said chamber through said gauze.

In testimony whereof I aflix my signature.

AVERY L. LU'MBY.

Images