US261462A - Henry - Google Patents

Description

(No Model.)

H. C. JOHNSON 8v F. M. MOMILLAN.

COOLING AND VBNEILATINe GARS 462l Patented July 18, 1882.

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UNITED STATES PATENT OFFICE.

HENRY O..JOHNSON AND FRANCIS M. MGMILLAN,OF WASHINGTON, D. O.

COOLING AND VENTILATING GARS.

SPECIFICATION forming part of Letters Patent VNo. 261,462, dated July 18, 1882.

Application filed Api-i1 er, lesa (No model.)

To all whom it may concern:

Be it known that we, HENRY C. JOHNSON and FRANCIS M. MGMILLAN, of Washington, in the District of Columbia, have invented certain Improvements in Cooling and Ventilating Cars, ot' which the following is a specification.

This invention relates to a modication or adaptation of the system of refrigeration or cooling described and claimed in the patent granted to us bearing date May 9, 1882, and numbered 257,506; and theimprovements consist in combining with our former apparatus in a railway-car a fan or air-forcing apparatusV driven from the truck-wheels and arranged to draw the air through a filtering or purifying material, to pass it through a chamber cooled by the expansion of gas, as in said patent, and to deliver it thus purified into the interior of the car. It further consists in utilizing theview illustrating the employmentof the ordi-v nary heater pipes or coils.

As will be seen by reference to our patent above referred to, our system of cooling consists essentiallyin chargin ga portable receiver with liqueed gas, and permitting said gas to escape in a tine stream and expand in a coil or chamber, then to pass oft', and in the present instance we prefer to follow closely the same plan, though not limiting ourselves absolutely thereto.

The air supplied to the cooler-.is preferably drawn through a filtering-chamber, and then passed upward through Water to purifyit and to precipitate or remove dust, cinders, and other. foreign matters but the filtering-chamber mayin some cases be omitted, and-the air simply passed upward through the water.

The present arrangement is designed primarily for cooling passen ger-cars, but may also be used With advantage in cars for the transportation of perishable matters.

Referring again to the drawings, A represents a car, Within which is placed a receiver, B, charged with liquefied gas, (carbonic-acid gas being preferred,) said receiver communieating with an expansion coil or chamber, C, and being provided with a cock or valve, D, by which the discharge of gas into the coil `may be carefully regulated. p

The coil or expansion chamber is placed Within a casing or chamber, E, which may or may not contain brine or other non-congea-lable liquid, and is arranged to discharge the spent gas at the outside of the car'ordinarily.

F represents afan or other air-forcing apparatus communicating' with and arranged to deliver air intothe chamber E, its supply being taken from outside the car through a suitable inlet-pipe, G, which is preferably extended' above the car and formed with a filtering-chamber, H, in vihich is placed charcoal, sponge, gravel, or other suitable filtering material.

The discharge end of the spout of fau F is bent downward and dips into a well or pit, E',

at the bottom or end ot' chamber E, containing water, the mouth or open end ot' the fau-spout being carried nearly to the bottom ot' the well or water-chamber, as shown in Fig. 2, so that the air discharged through said spout is caused to ascend through the water, by which plan all impurities are removed and the air is in a measure cooled. If brine or other non-cougealable liquid be employed in the chamber E, as will frequently be the case, the cooling will be wholly effected by the passage of the air through the refrigerated liquid in this Inanner, and in such' case we will preferably employ1 mechanism similar to that shown and described in our aforesaid patent to effect a circulation of the liquid through the chamber E and outer coil or chamber to remove the heat absorbed.

For the purpose of operating the fan and the circulating mechanism, if any be used, we provide a friction-wheel, I, which is arranged to bear upon the tread of one of the truckwheels, or upon a special wheel secured to one of the truck axles, said wheel being held against the driving-wheel by a spring, J.

On the same shaft with wheel I is placed a belt Wheel or pulley, K, from which a belt, L, is carried about the fan-pulley M, as shown, thus imparting motion to the fan. The belt L will preferably he made of elastic material, to prevent any undue strain upon the machinery when the ear is turninga curve or through the vertical movement of the car-body.

In palace-ears, where double Windows are commonly employed and the Walls are thick, the invention can be applied to special advantage, the doors, windows, and other openings heilig closed and the necessary supply and exchange of air being' a'orded through the action ot' the cooling apparatus. In this way the heat and dust of summer travel by rail may be entirely obviated.

In cars provided with the Baker heater or similar heater employing circulating pipes or coils the heater proper may be detached and removed, and the brine or liquid or the liqueed gas circulated through the ordinary heating-pipes, thus permitting the apparatus to be applied to cars with great facility and to the best advantage. When this is done. the air circulating or forcing apparatus may be omitted in some cases but we preier to retain itin all cases to give the proper supply and change of air.

The brine or liquid may in some cases be pumped or raised to the top of the car and allowed to descend in the form of a spray through the cooling-chamber.

We are aware that heat-distributing pipes have been used for cooling purposes, and this we do not claim.

Having thus described our invention, what we claim is- 1. The herein-described cooling apparatus for cars, consisting of gas-receiver B, eXpansion coil or chamber U, tank E, fan F, and friction-gear, substantially such as shown and described, forimparting motion from the truckwheels to the fan.

2. In combination with a refrigerating apparatus substantially such as described, acasing surrounding the expansion coil or chamber or a part thereof, and provided with a liquidchamber, and a fan arranged to deliver air into the liquid-chamber, substantially as explained, whereby the airis caused to pass upward througbthe liquid.

3. In combination with a refrigerating apparatus substantially such as shown and described, a i'an arranged to supply airthereto, and a supply-pipe i'orthe t'an, provided with a filtering-chamber, as and for the purpose set forth.

HENRY C. JOHNSON. FRANCIS M. MCMILLAN.

Nitnessesz ALBERT MILLER, JAMES A. BABsoN.

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