Patented Feb. 2l, |899.

L. W. CANADY.

VENTILATOR FOR CARS.

(Application led Nov. B, 1897.)

I 2 Sheets-Sheet l.

(No Model.)

W/TNESSES.'

A TTOHNE YS.

No. 6|9,7|8.y Patented Feb. 2l, |899. L. W. CANADY'.

VENTILATOH FOR CARS.

(Application filed N S, 1897.)

No?. 2 sheets-sheet 2 A from/frs.

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UNITED STATES PATENT OFFICE.

LORIN WINFIELD CANADY, OF TOYAH, TEXAS.

VENTILATOR FOR CARS.

SPECIFICATION forming part of Letters Patent No. 619,718, dated February 21, 1899.

Application filed November 8, 1897. Serial No. 657,806. (No model.) 'y

To all whom it may concern:

Be it known that I, LoEIN WINEIELD CAN ADY, of Toyah, in the county of Reeves and State of Texas, have invented a new and Improved Ventilator for Cars, of which the following is a full, clear, and exact-description.

This invention relates to anapparatus for Ventilating cars and other chambers by thermostatic regulators by means of movementtransmitting mechanism controlled by a thermostat and certain peculiarly-constructed shutters or covers by which orifices are opened and closed in accord with the conditions of the temperature.

This specification is the disclosure of one form of my invention, while the claim defines the actual scope of the invention.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the figures.

Figure 1 is a sectional plan of the invention on the line 1 1 of Fig. 2. Fig. 2 is a vertical section of the invention on the line 2 2 of Fig. 1, and Fig. 3 is an elevational section on the line 3 3 of Fig. 2.

The invention is shown in connection with a railway-car. Each end of the car has two openings 5 therein,'- which are covered by screening 6. Each opening 5 is commanded by a door or shutter 7. These doors may be provided with felt surfaces engaging around the openings 5, so as to eect a thorough closure of said openings. The doors or shutters 7 are respectively mounted on rods 8, rockably carried in brackets 9, secured to the car. Spiral springs 10 respectively encircle lthe rods 8 and serve normally to open the shutters.

Brackets 1l, projecting in pairs from the ends ofthe car, respectively carry rock-shafts 12, on which cams 13 are fixed. The cams 13 are two for each rod 12, and there is one rod 12 for each shutter 7. The cams 13, bearing near the roof thereof is a longitudinal beam 14. The beam 14 has two thermostatic rods 15 lying on top thereof and rigidly secured thereto, respectively, at the outer ends of the rods. The remaining portions of the rods are free with reference to the beam 14, and the inner ends of the rods 15 terminate adjacent to each other and are connected with a lever 16, running horizontally beneath the roof of the car and having its inner end guided bya hanger 17, supported from the roof. The expansion and contraction of the rods 15 swings the lever 16 within the hanger 17. The inner end of the lever 16 is provided with a cross-bar 18, connected at its ends with the respective differentially-mounted levers 19, the arrangement being such that upon the expansion of the rods 15 the parts 16, 18, and 19 will be so moved as to throw outward the upper ends of the levers 19. These outer ends of the levers 19, being respectively connected with reciprocal bars 20, move outward said bars upon the expansion of the rods 15. The two bars 2O extend, respectively, to the ends of the car and are bent downward and thence horizontally, the horizontal portions forming racks 21. The racks 21 respectively mesh with pinions 22, secured,`respectively, upon the two uppermost shafts 12. By these means said uppermost shafts 12 are turned, and the cams 13 of said shafts are operated to control the shutters 7. The two lowermost shafts 12 are respectively controlled from the corresponding upper shafts by sprocketchains 23, running around sprocket-wheels 24, secured one to each shaft 12. By this arrangement the shutters 7 are controlled in absolute unison with the temperature of the car, so that as the car becomes hot the shutters are opened and as the car becomes cold the shutters are closed in proportion to the reduction of the temperature.

Having thus described my invention, I claim as new and desire to secure by Letters Patent- The combination, with a structure to be ventilated, having an opening therein, of a rod rockably mounted adjacent to the lower edge of the opening, a shutter carried on the rod and capable of closing the opening, a rock-shaft extending parallel with the rod and IOO located above the same adjacent to the shutter, a cam attached to the rook-shaft and engagging the shutter to throw the same to closed position, a pinion fixed to the rook-shaft, and a horizontal sliding bar, one end of which is bent downward and thence horizontally, and the horizontal portion bentgprovided with rack-teeth engaging the pinion, whereby to throw the rook-shaft.

LORIN WINFIELD CANADY.

Vitnesses:

M. J. DOYLE, WM. OLIVER.