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Improvement in respirators

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US145874A
US145874A US145874DA US145874A US 145874 A US145874 A US 145874A US 145874D A US145874D A US 145874DA US 145874 A US145874 A US 145874A
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respirator
plate
teeth
james
opening
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    • AHUMAN NECESSITIES
    • A62LIFE-SAVING; FIRE-FIGHTING
    • A62BDEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
    • A62B23/00Filters for breathing-protection purposes
    • A62B23/02Filters for breathing-protection purposes for respirators
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D46/00Filters, i.e. particle separators or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/10Particle separators, e.g. dust precipitators, using filter plates, sheets, or pads having plane surfaces, i.e. axial filtering

Description

a w. JAMES.

Respirators. 145,37 Patented Dec. 23,1873.

Wfinemrea, ar

UNITED STATES PATENT QFFIGE.

BUSHROD W. JAMES, OF PHILADELPHIA, PENNSYLVANIA.

IMPROVEMENT IN RESPIRATORS.

Specification forming part of Letters Patent No. 145,874, dated December 23,1873; application filed March 8,1873.

To all whom it may concern:

Be it known that I, BUsHRoD W. JAMEs, M. D., of the city and county of Philadelphia, State of Pennsylvania, have invented an Improved Respirator, of which the following is a specification:

The object of my invention is to provide a more convenient respirator than those heretofore used; and I accomplish this object, first, by constructing the said respirator of two plates or screens,A and B, of wire-gauze, (see Fig. 2,) connected together, and confining between them a filling, D, of fiber or fabric,

the rear plate B, and overlapping the front plate A; but other equivalent fastenings may be substituted for these hooks. The required degree of rigidity is imparted to the plates A and B by providing each of them with an edging or frame, (1, of silver or other metal not liable to corrode, the wire-gauze portion 6 being soldered or otherwise secured to these frames. (See detached views, Figs. 3 and 4.)

The valve (0 consists, in the present instance, of a simple disk of rubber connected to the plate at one point, 00, and covering an opening in the said plate and in the filling D, (see Figs. 3 and 5,) the latter consisting of any suitable open fabric or fiber which will take up the noxious particles from the air which passes through it before entering the mouth and lungs.

The respirator is simply placed against the teeth and gums, to the shape of which it is adapted, and is retained in place by the pressure of the lips, so that it can be readily removed and replaced, and the filling changed after it has become charged with noxious particles. In some instances, the respirator may be so constructed as to be adapted to the interior of the mouth, in which case it would be necessary to retain it in position by means of a suction-plate, similar to those used for artificial teeth.

I claim as my invention- 1. A respirator, consisting of two detachable perforated plates,A B, and intervening strainer D, the whole being constructed as described, so as to be retained between the lips and the teeth.

2. A respirator, constructed as described, so as to be retained between the teeth and the lips, and provided with a strainer, D, and with a valve opening outward and covering an opening in the strainer, as set forth.

In testimony whereof I have signed my' name to this specification in the presence of two subscribing witnesses.

BUSHROD W. JAMES, M. D.

Witnesses WM. A. STEEL, JOHN 'K. RUPERTUS.

US145874A Improvement in respirators Expired - Lifetime US145874A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5140980A (en) * 1990-06-13 1992-08-25 Ilc Dover, Inc. Hood mask and air filter system and method of manufacture thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5140980A (en) * 1990-06-13 1992-08-25 Ilc Dover, Inc. Hood mask and air filter system and method of manufacture thereof

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