US389748A - howson - Google Patents

Description

l 2 Sheets-Sheet 1.

R.. HowfsoN a@ E. GROWE.

GOIN RELEASED SPIROMETER. No. 389,748.

Patented sept. "18', 1888-.

Inn :4.65751 MMM R. HOWSON 8 E. CROWB.

GON RELEASED SPIROMETER.

No. 889,748..." Patented Sept@ 18,1888.v

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N. PETERS. Phom-Lhhognpher, Walhngtn, DAL

' y UNITED STATES YPATENT OFFICE.

RICHARDfHowsoN AND EDWARD oRowE, or MIDDLEsRRoUGHoN-TEEs, COUNTY or YORK, ENGLAND.

COIN-RELEASED SPIROMETER.

sPEcIPrcA'i- IQN forming part or Letters Patentino. 389,748, eared september 18, laca.

' Application med Mtb-31,18%. serial No. 275,585. (No modmratenteu inrmnce september 22,1881, No. 186,019, and in Belgium september 27', iss-1, No. 79,018.

To aZZ whom it may concern.-

Be it known that we, RICHARD HowsoN and EDWARD CROWN, engineers, subjects of the Queen of Great Britain, residing at Middlesbrough-on-,Tees, in the county of York, England, have invented a new and useful Improved Spirometer or Lung-Testing Appa: ratus, (for which we have obtained patents in@ France, No. 186,019, bearing date Septemberl 22, 1887, and in Belgium, No. 79,018, bearing date September 27,'1887,) of which the following is a specification.

This invention relates to the construction of an improved spirometer or apparatus for testing the lungs by means of a'pressure gage actuated through lthe medium of a mouthpiece and blow-pipe, which are constructed and'arranged in the ordinary manner; and this invention consists in arranging in combination therewith-certain mechanism which will prevent the gage with which the apparatus is provided being acted upon until a coin has been introduced into a slot or receptacle provided for its reception.

We will now describe our invention with reference to the'accompanying' drawings, in which the same letters of reference indicate like parts in all the gures.

Figure 1 is a front view of the apparatus; Fig. 2, a back view of the same with the back of the case removed and part of the mechanism in section; and Fig. 3 is a side view with the side of the case removed and part of the mechanism in section. In the last figure the lever G is removed; but the pivot g2, on which the same is mounted, is shown.

The mechanism constituting the subject of this invention is arranged within a case, A. The mouthpiece B is connected by the blowing-tube b with the cylinder C, in which the piston d is arranged to work freely. In the side of the said cylinder is an air-passage, e, leadingto the pressure-gage F. To the upper face of the piston d is attached the spindle d', which passes through an aperture in the cover of the cylinder. lWhen the mechanism is in its normal or locked position, the piston d rests on a seat at the bottom of the cylinder C and closes the inlet-orifice, and it is retained in that position by a catch, g, which forms part of the rocking lever G, of which g2 is the pivot. The cover of the cylinder C is perforated to allow of the escape of any air which may be forced past the said piston when the same is locked, as lastly described. One end of the lever G is counterweighted, and to the opposite end is attached the shelving-plate g. The lever I-I, which is pivoted to the lastmentioned end of the lever G, is counterweighted at one end and is turned up or provided with a projecting stop at the opposite end'. The lever H is so arranged in reference to the spindle dthat the latter in its upward movement will come into contact with the weighted end of thersaid lever and will turn it on its pivot, whereby the coin is released, as hereinafter described. I is the chute down which the coin passes from the slotin the case A tothe shelving-plate g'.

The action of the mechanism hereinbefore described is as follows: When the mechanism is in its normal position, the piston d is retained by the catch g against its seat at the lower .end of the cylinder C; consequently the air-inlet is closed. On a coin being passed through the slot 7c it slides down the chute I onto the shelving-plate g',wherc it is retained for the time by the turned-up end of the lever II. The weight of the said coin overbalances the counter-weight and causes the lever G to turn on its pivot, whereby the catch g is disengaged from the end of the spindle d. On air being blown through the tube bthe piston d rises to the top of the cylinder C, closes the perforations thereimand opens the passage e, through which the air passes to the gage. In its upward movement the spindled catches the-leverHand, turning it on its pivot, causes the turned-up end thereof to be moved from the end of the shelving-plate g', thus allowing the coin to slide off, the consequence being that on the descent of the piston the lever G resumes its normal position and again looks the mechanism.

We wish it to be understood that we do not desire to confine this invention to the exact details hereinbefore described, as they admit of many modifications. For instance, a flexible diaphragm or a hinged valve may be substituted for the piston d, and springs may be IOO used instead of counterwvcights. Vith regard to the pressuregage, we have hcreinbefore re- Ierred to it as an ordinary dial-gage; but, if desired, a mercurial column might be substituted therefor.

What we claim is- L In a spirometcr or lung-tcslcr, the combination, with the pressuregage and with the air tube or passage leading thereto, of a valve located in said tube or passage to open and close the same, and a movable stop connected with a connterwcighted lever forlocking said valve while the lever is controlled by the counter-weight and for unlocking it when the counter-Weight is overbalanced, substantially as set forth.

.2. In spironieters or lungtesters, the comblnationmith the pressure-gage and with the tube or passage leading thereto, of a valve located in said passage to open and close the saine, and a counterweighted lever provided with a stop which locks the valve while the lever is controlled by the counter-Weight, said lever being provided with a plate or receptacle adapted to receive and hold a coin or Weight to overbalanee the counter-weight and unlock the valve, substantially as set forth.

3. In spirometers or lung-testers, the com` bination,with the pressi'xregage and with the tube or passage leading thereto, ol` a valve located in said passage to open and close the same, a pivoted counterweighted lever provided with a stop or shoulder which locks the valve and closes the tube or passage While the lever is controlled by the counter-weight, and a secondary lever pivoted to said counter- Weighted lever and carrying a plate or receptacle adapted to receive and hold a coin or Weight for overbalancinr the counter-Weight, the end of said secondary lever standing normally in the path of a stem of the valve,where by the movement of the latter will trip the said lever and discharge the coin er weight from its plate or receptacle, substantially as shown and described.

4. In spirometcrs or lungtesters, the combination, with the pressure-gage and with the tube or passage leading thereto, the latter being provided with avalve-chamber and valve, of a couuterweighted lever, G, pivoted above the valve-chamber and having an arm or shoulder which in the normal position of parts stands above the projecties:r stem of the valve and holds the latter to its seat, a secondary lever, H, pivoted to the lever Gand carrying at one end a plate or receptacle to receive and hold a coin or weight to overbalauee the counter-weight of lever G and tilt the latter, whereby the valve is released and allowed to risc und trip the said secondary lever to discharge the coin or Weight from its receptacle, and a chute leading from an aperture in the ease to the plate or receptacle en the second arylever,substantiallyas shown anddescribed.

ln Witness whereof we have hereunto set our hands this 10th day ol April, 1888.

RICHARD HOWSON. EDWARD CROXVE. Witnesses:

WM. Poaarrr INGHAM, Engineer, Quecns Square, IlIiddZcsbroum//t 0n- Tecs.

FRED lSARRATr, Solicizofs Clerk, BIddZcsbr/utgh.

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