US1352626A - Sanding device - Google Patents

Description

H. POWER.

SANDING DEv|cE.`

APPLICATION FILED DEC. 3i, 1919.

Patented Sept. 14, 1920.

\ sa r Henry Power.

Inventor. f/f

per. Atrney U'NiTEo STATES PATENT OFFICE.

HENRY roWER, or MONTREAL, QUEBEC, CANADA, AssIGNoR F ONE-HALF To AWILLIAM HALTON, oF MONTREAL, CANADA.

SANDING DEVICE.

Specification of Letters Patent. Y Patented Sept. 14, 1920 Application filed December 31, 1919. Serial No. 348,564.

ments in Sanding Devices; and l hereby declare that the following is a full, clear, and

exact description thereof.

Heretofore considerable inconvenience and loss have been experienced in thev generation of electric power by the pulley and belt drive connecting an axle of va car with a. dynamo, owing to the fact that under certain conditions friction betweenthepulley and belt is reduced to such an extent that ythe pulley actually loses its grip'on thebelt and rotates freely without it. Many attempts haveV been made to increase the holding power of the belt and pulley by changing the structure of one or the other without avail and my invention is to cure this defect and increase the friction, and thus overcome the slipping between pulley and belt whenever the prevailing conditions require and and particularly during the Winter season when snow yand ice frequently completely gestroy the friction between the rpulley and elt. f

I solve the problem by providing a device which will project sand or other gritty ymaterial to the contacting surfaces of pulley and belt. More specifically stated the invention consists of an air nozzle communicating with a chamber, a sand projecting tube being connected to the opposite side of lthe chamber leading to a convenient point in close proximity with the points of contact between the pulley and belt; the nozzle being preferably adjustable. The air supply is controlled Vby a manually operated valve and an automatic valve. The sand receptacle is preferably air tiglit,"and the connectionr between it and thev sand delivery Atube' is preferably a loose one to permit back pressure air to escape without entering the sand box. Another feature of the invention consists of a protection for the ejector from escaped steam from thev heating equipment of the car or other damping influences.

. For fullcOmprehension however, of my Y invention, reference must be had to the accompanying drawings in which similar reference characters indicate the saine parts and wherein:

Figure l illustrates in elevation aportion ,of the frame of a passenger car equipped with my invention; j

Fig. 2 is an enlarged vertical sectional view illustrating the connection between the sand receptacle and delivery tube; and

Fig. 3 is a vertical sectional view of the sand delivery tube and ejector.

The apparatus is designed to produce the desired results with the least practical amount of sand and compressed air, the principle being to use a small stream'of sand at relatively high velocity, and this only when additional friction between pulley and belt is known to be necessary. This reduces the wear of the belt and pulley to a minimum.' Infact it is reasonable to believe that it actually saves wear as compared with continued slipping of the pulley within the belt. j

Compressed air is used in an economical manner `by passing vsame through a discharge nozzle l0 designed to produce high velocity, this requiring a minimum amount to produce the desired results. The operation being controlled `manually or by an electrically operated automatic control valve. For manual control Ofthesand an operating cock 12 is placed in the vicinity of the switch panel (as indicated in Fig. 1) so that trainmen when holding the operating cock open may have a view of the voltmeter, and as soon as the voltmeter indicates that the dynamo is generating, the operating cock may be allowed to close, thus shutting off the application of sand. The electrically operated automatic control valve 2 'employed by me is preferably of the type commonly used on the cars of electric rail- A ways for signaling, the valve stem constibe disconnected from the dynamo by a] switch The apparatus for supplying the sand to the contacting surfaces of the pulley. and

belt comprises a box lll to contain the sand or other comparatively dry gritty substance reterred to hereafter as sand. The sand box is litted with a comparatively tight cover l5 adapted to be held against displace ment by the vibration ot the car or other causes, and it may be any desired shape and located in any convenient place on the car or may be sunk in the floor or placed underneath the car tloor. lt `is preferable, but not absolutely necessary, that the bottoni ot the box be inclined toward the outlet tube so as to discharge all ot the contents by gravity. The lower end of the neel; 2O enters loosely into the upper end ot the sand delivery tubeV j 2l which is sui'liciently larger to provide an outlet tor upwardly flowing air due to back pressure in the ejector and caused by stop page ot the sand projecting tube, or other suse. The i ee escape oit this baclr pressure air prevents air pressure accumulating in the sand box and straining it and possibly scattering its contents. This emergency air outlet is to taire care oi"A the lirst impulse due to the deflection. of the air, but this is not suilcient to compensate tor sustained blockage. To obviate the continued leal:- age ,ot the back-pressure air a swinging checlr valve 25 is located in the delivery tube 2l and adapted to romain open under normal conditions ot operation and automatica ly close when there is a continued dow ot sand and air or air alone in the reverse direction.

rlfhe ejector is attached to the lower end of the tube 2l and consists ot ejector body SO presenting a nflm-chamber to receive the sand delivered through the tube by gravity. One end ot the ejector body is connected to a tube 32 tor projecting the sand against the contact surfaces ot the belt and pulley. The opposite end ot the ejector body is iitted with a bushing 33 in which is screwed the adjustable nozzle l0. rlhe end ot this nozzle through which the air is discharged is disposed near the inner end of the sandprojecting tube so tnat only a small amount of sand flows by gravity in front ot the nozzle. The exact Vposition ot the nozzle may be adjusted however by screwing it into, or out ot, the ejector body, and when correctly adjusted it is secured by means oi' a lock nut 35 screwed tightly against th end of the ejector body. The air discharge opening may be straight or cone shaped, aud

ot such proportions aste produce the maxi# mum velocity. operation the discharge oi a ir trom the nozzle into the projector tube will tenl to produce a vacuum which assists gravity in bringing down sand where it will be thrown or drawn into the projecting tube.

rlhe projecting tube 'Lor to a point within the pulleys and belt,

extends from the ej ecthe space inclosed by and preferably is directed toward the center of the pulley, in such a manner that regardless of direction of rotation ot the driving pulley the sand will be quickly carried to the belt where it will produce increased friction to overcome the undesired slipping.

The nozzle l0 is connected to the air pipe line 50 by a combined nut and swivel 5l. The adjacent portion or" the nozzle being et increased diameter to receive a strainer 53 which preventsthe sand lodging within the pipe line. y

To provide for normal movement of car trucks relative to the car body, the sandprojecting tube is supported, trom the car body only, by any convenientiarrangement o't hangers or braces indicated at 40. Thi tube is preferably placed to one side of the top line ot the belt, and passes it at an angle so that the end oit the tube will be directed as nearly as possible to the center ot the pulley.

In order to protect the ejector from the dampness of the atmosphere beneath the car, due to escaping steam or other causes, an insulated box ('30 oteither metal or wood incloses the saine and the bushing 30 of the nozzle is fitted into one side thereof permitting the nozzle to be adjusted without disturbing the connections between thebox and the ejector body or opening'the box, and without disturbing the liller with which the box is packed to protect the ejector.

What l claim is as follows l. In railway passenger car equipment the combination y'ith an axle, a dynamo, a pulley on the axle, a belt looped around the pulley, and an operative connection therebetween and the dynamo, of means for supplying sand to the contacting surfaces of the pulley and belt, consisting of a receptacle for sand; an ejector, a sand delivering tube connecting the sand receptacle to the ejector, an air nozzle with its discharge within the ejector, a sand projecting tube leading -lt'rom the ejector at a point in` alinement with the nozzle to apoint in close proximity with the contacting surfaces of the pulley and belt; and means whereby compressed air is supplied to the nozzle.

2. In railway passen nrer car equipment the combination with an axle, a dynamo, a pulley on the axle, a belt looped around the pulley and operative connection therebetween and the dynamo, meansl for supplying sand to the contacting surfaces ot the pulley and belt, said means consisting of a receptacle for sand; an ejector, a sand delivering tube connecting the sand receptacle to the ejector, -a check valve within said tube, an air nozzle with its discharge within the ejector, a sand projecting tube leading from the ejector at a point in alinement with the nozzle to a point in close proximity with the contacting surfaces of the pulley and belt; and means whereby compressed air is supplied to the nozzle, the connection between the sand box and sand delivering tube being loose to permit the escape of back pressure air.

3. In railway passenger car equipment the combina-tion with an axle, a dynamo, a pulley on the axle, and a belt looped around the pulley and an operative connection therebetween and the dynamo, means for supplying sand to the contacting surfaces of the pulley and belt, said means consisting of a receptacle for sand; an ejector, a sand delivering tube connecting the sand receptacle 'to the ejector, an air nozzle with itsl discharge within the ejector, a'sand projecting tube leading 'from theejector at a point in alinrnnentv with the nozzle to a point in close proximity with the contacting surfaces of the pulley and belt; and means whereby compressed air is supplied to the nozzle, an adjustable connection between the nozzle and ejector. f

1l. ln railway passenger car equipment the combination with an axle,`a dynamo, a pulley on the axle, and a belt looped around the pulley and an operative connection there-between and the dynamo, means for supplying sand to the contacting surfaces of the pulley and belt consisting of a receptacle for sand; an ejector, a sand delivering tube connecting the sand receptacle to the ejector, a screw threaded bushing within the neck of the ejector, an air nozzle adjustably mounted within the bushing with its discharge within the ejector, and adapted to supply compressed air thereto, a sand projecting tube leading from the ejector at a point in alinement with the nozzle to a point in close proximity with the contacting surfaces of the pulleyA and belt. 5. In railway passenger car equipment the combination with an axle, a dynamo, a pulley on the axle, and a belt looped around the pulley and an `operative connection there-between and the dynamo, means for supplying sand to the contacting surfaces of the pulley `and belt consisting of a receptacle for sand; an ejector, a sand delivering tube connecting the sand receptacle to the ejector, an air nozzle with its discharge within the ejector, a sand projecting tube leading from the ejector at a point in alinement with the nozzle to a point in close proximity with the contacting surfaces of the pulley and belt; and means whereby compressed air is supplied to the nozzle and an insulating box inclosing the ejector and associated parts.

In testimony whereof I have signed my name to this specification in the presence of two witnesses.

HENRY POVER.

lVitnesses GORDON COOKE, WILLIAM J. C. HEwn'rsoN.

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