US905957A - Ventilator for cars. - Google Patents

Description

L. B. J. THURSTON. VENTILATOR FOB GARS.

LPPLIoATloN FILED Nov. f4, 1907.

905,957. Patented Dec.4 s, 1908.

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`LAMBERTON BERTIE JOI-IN THURSTON, OF STRATFORD, ONTARIO, CANADA.

VEN TILATOR FOR CARS.

Application filed. November 4, 1907.

Specification of Letters Patent.

. Patented Dec'. 8, 1908.

Serial No. 400,712.

To all whom it may concern:

Be it known that I, LAMBERTON BERTIE JOHN THUnsToN, a citizen of the United States, a resident of the city of Stratford, in the county of Perth, in the Province of Ontario, Canada, have invented certain new and useful Improvements in Ventilators for Cars, of which the following is the specification.

My invention relates to car ventilators, and the object is to provide a ventilator which is cheap and simple in'construction, and yet very efficient, and which can be installed on any car. means of the device illustrated in the accompanying drawings, in which:

Figure 1, is a perspective view showing a portion of a car with two of my ventilators in place. Fig. 2, is an enlarged elevation of my ventilator looking from the interior of the car, and Fig. 3 is a sectional plan as in Fig. 2.

Throughout the several views, like characters of reference refer to the same or corresponding parts.

A is a tube of metal or other suitable material having threaded ends on to which are screwed the elbow ieoes B the outer ends of which are faced o at an angle of about 30o with the tube A.

O and C are offset tubes, the ends of which are beveled and extend through the walls of the tube A so as to form inwardly projecting lips D D the tubes being so placed that the bevel of each lip slopes downwardly toward the end of the tube A nearest to it. The outer ends `of the tubes O and O are threaded and extend through the side E of the car.

F are nuts threaded on the tubes O and O and located outside the car, and G are threaded disks screwed on to the tubes O and O and located inside the car. j

By means of the nuts E and disks C, the ventilator may be rigidly attached to the car.

H is a regulator consisting of a flat plate pivotally mounted between the disks O, and which may be manipulated so as to cover or uncover the ends of the tubes C and O.

As shown in the drawings my ventilator is placed on either side of the car above each window, but I may place it on the roof of the car or in any desired position.

The operation of my ventilator is as follows: Assuming the car to be moving in the direction indicated by the arrows in Figs. 1 and 2, the relative motion of the air will be in I attain these results by.

the opposite direction. This current of air rushing through the pipe A impinges on the lip D. A portion is thereby deflected and passes down the tube C into the car thus supplying a constant current of fresh air; at the same time, the balance of the air rushing past the tube C (which it does not enter owing to the manner in which the lip D is formed) produces an entraining actionwhich draws the air from the interior of the car through the tube O. Thus there is a constant circulation of air produced in the car, fresh air is blown in through the tube C and the foul air is sucked out of the tube O.

Although a definite direction of motion has been assumed for purposes of illustration, it will readily be understood that the action of my ventilator is not aected by a reversal in the direction of motion, the only effect of such a reversal is that what was formerly the inlet becomes the outlet and vice versa.

As shown in the drawings the elbow pieces B project downwardly. This is not essentia but gives a neater appearance.

It will be noticed that the beveled formation at the end of the elbows B present lips B exposed to the full rush of air as the car is moving, and consequently any cinders or flying particles project themselves against the lip B and are deflected away from the tube entrance. This I find in practice, however, does not affect the inrush of air through the tube. Again the plate H may be a spring plate or may be spring held, so that no matter in what positionit may be set the inlet and outlet is equal. For instance, if it is desired to reduce the amount of ventilation in the car this is readily accomplished by swinging the plate into a position to partially close 4the inner ends of both the inlet and outlet tubes C and O.

What I claim as my invention is:

1. In a car ventilator, a main tube secured in (position parallel with the side of the car an communicating with the interior thereof through the side of the tube next the car and having end elbows set approximately at an angle of forty-five degrees to the axis of the tube and provided with inclined ends, whereby deflecting lips are formed outside of the main line of the tube as and for the purpose specified.

2. A car ventilator comprising a main tube lying parallel to the side of the car, inlet and outlet tubes extending from the main tube through the body of the oar to the outside thereof, and each tube being provided I gular elbows secured to the ends of the main with a lip at the outside end projecting into the body of the main tube and located on the side remote from the end of the tube and a pivotal plate located vat the inside of the tubes whereby the size of the orifice in both inlet and outlet tubes may be simultaneously regulated as specified.

3. A car ventilator comprising a main tube lying parallel to the side of the car, inlet and outlet tubes extending from the main tube through the body of the car to the inside thereof, and each tube being provided with a lip at the outside end projecting into the body of the main tube and located on the side remote from the end of the tube and anl tube and forming deflecting lips outside of the main line of the tube as specified.

4. A car ventilator comprising a main tubular portion open at both ends and lying parallel to the side of the car, elbows located at the outer ends of the tubes, tubes extending from the side of the main tube neXt the car inwardly through the body of the car and provided with lips extending into the main body of the tube and fastening nuts screwed on to the inner ends of the tubes as specied.

LAMBERTON BERTIE JOHN THURSTON.

Witnesses:

F. M. GREGORY, W. A. GOETZ.

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