US665169A - Car-ventilator. - Google Patents

Description

No. 665,!69. j Patented Ian. I, 190i. L. H. BOWMAN.

OAR VENTILATOR.

(Application filed Nov. 9, 1899. Renewed Oct. 29, 1900.)

(N0 Model.)

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: UVVENTOH 7 Q AWOH/VEYS WITNESSES UNITED STATES ATENT OFFICE.

LEWIS H. BOWMAN, OF WALLA WALLA, WASHINGTON.

CAR-VENTILATO R.

SPECIFICATION forming part of Letters PatentNo. 665,169, dated January 1, 1901.

Application filed November 9, 1899. Renewed October 29, 1900. terial No. 34,804. (No model.)

To all whom, it may concern:

Be it known that I, LEWIS H. BOWMAN, a citizen of the United States, and a resident of Walla Walla, in the county of Walla Walla and State of Washington,have invented anew and Improved Oar-Ventilator,of which the following is a full, clear, and exact description.

This invention relates to improvements in ventilators for cars, the ventilator being in the form of a fan adapted by its rotation to cool the atmosphere and to drive floating dust from the car; and the object is to provide, in connection with the ventilating-fan,a motor operated by the current of wind when the car is in motion.

I will describe a car-ventilator embodying my invention and then point out the novel features in the appended claims.

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 section on the linel l of Fig. 2 of the ventilator embodying my invention. Fig. 2 is a section on the line 2 2 of Fig. 1, and Fig. 3 is a bottom plan view of the ventilating-fan and its support.

Referring to the drawings, 1 designates the ,roof of a car, on which is mounted a turret 2,

position, the hub-section 5 is prevented fromv movement relatively to the section 6 by means of a set-screw 9, which passes through one of the arms 4 and engages in a recess formed in the upper end of the section 6. A shaft 10 has screw-thread engagement with the hubsection 5, as clearly indicated in Fig. 1, and this shaft-extends downward through the cup 8, and at its lower end it has an annular ring 11, upon the upper surface of which bearingballs 12 are arranged in a ring-like cup 13,

attached to straps or arms 14, bolted to the roof of the car.

Mounted on an angular portion 15 of the shaft- 10 is a fan, consisting of outwardly-extended blades 16, which are arranged at a transverse incline.

For the purpose of holding the fan from rotation when desired I employ a locking device, here shown as consisting of a bolt 17, movable through lugs formed on one of the straps 14: and normally held inward to engage in a notch in the portion 11 of the shaft 10 by means of a spring 18. To disengage the bolt from the shaft, the bolt is to be drawn outward, and it may be held in its outer position by engaging its crank end 19 with the outer side of a lug 20 on the strap 14.

In operation as the car'is moving along the current of air passing through the turret will cause the motor-fan to rotate rapidly, and this of course will cause the ventilating-fan to rotate rapidly in the car; but the turret may be dispensed with. however, as it not onlydirects the current of wind directly to the motor-fan, but it serves as a housing or protection for said fan.

Having thus fully described my invention, I claim as new and desire to secure by Letter Patent 7 I 1. In a car-ventilator, the combination of a hub formed of sections detachably secured together,one of the sections being provided with arms, blades secured to the arms in position to be revolved by the wind, a shaft having one end mounted in a bearing and its other end detachably secured to the hub, and a fan mounted upon said shaft, substantially as described.

2. In a car-ventilator, the combination of a hub formed of sections, one section being internally screw-threaded and the other exteriorly screw-threaded and provided with outwardly-extending arms and athreaded bore, means for locking the sections of the hub together, blades carried by the arms of the hub in position to be revolved by the wind, a shaft having one end mounted in a bearing and its other end screw-threaded and screwing into the bore of the hub-section, and a fan on the said shaft, substantially as described.

3. A ventilator, comprisinga fan arranged I prefer to use it,

on the inner side of the car-roof, a shaft on which the said fan is mounted, said shaftbeing extended through the car-roof and screwthreaded, a hub having connection with the screw-thread of the shaft and formed of two sections detachably secured together, one section being provided With arms and the other with araceway for balls, spoon-shaped blades on the arms in position to be revolved by the wind, bearing-balls in the raceway of the lower hub-section, a ring-shaped cup secured to the inner side of the car-roof and supporting said bearing-balls, and bearing-balls for the lower portion of the said shaft, substantially as specified.

4. In a car-ventilator,tl1e combination with the roof of a car, and a turret thereon, of a hub mounted in the roof of the car and extending into the turret, said hub being provided with a threaded bore and outwardlyextending arms, blades secured to said arms in position to be revolved by the wind, arms secured to the under side of the roof and provided with a bearing, a shaft having one end mounted in the bearing and its other end screw-threaded and screwing into the bore of the hub, a fan on said shaft, and means for locking the shaft stationary, substantially as described.

5. In acar-ventilator,tl1e combination with a fan-shaft having one end mounted in a support, and its other end threaded, of a hub formed of sections, one section being internallyscrew-threaded and the other ex teriorly screw-threaded and provided With arms and a threaded bore, blades secured to the arms

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