US1182746A - Pump-valve. - Google Patents

Description

A. P. BROWN.

PUMP VALVE. APPLICATION FILED JULY 9A 1915.

1, 182,746. Patented May 9, 1916.

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ALEXANDER P. BROWN, 0I' LONG ISLAND CITY, NEW YORK.

PUMP-VALVE.

Application led July 9, 1915.

To ZZ 'zo/wm t may concern Beit known that I, ALEXANDER P. BROWN, a resident of Long Island City, in the county of Queens and State of New York, have invented certain new and useful Improvements in PumplValves, of which the follow ing is a specication.

The present invention relates to improvements in bellows, and more particularly to an instrument of this type which is particularly adapted for the use ot' piano makers, although suited for other purposes also.

Piano makers need two kinds of bellows, to wit: one of the suction type, and another one of the force or compression type. The A suction bellows is used for sucking dust from the tracker bars of player pianos and for similar purposes; and the compression bellows is made use of for producing a current of air, for instance, for cleaning the interior of pianos and other musical instruments.

One of the objects of the present invention is to provide .a bellows which is convertible from one of the types mentioned into the other one, or in other words a bellows which by a simple adjustment can be.

made to operate either as a suction pump or as a force pump.

Another object of the invention is to produce a device of this type which is simple in construction, efi'icient in operation, and which can be manufactured on a commercial scale, or in other words which is not so difficult to construct as to be beyond the reasonable cost of such an article.

With these and other objects in view, which will more fully appear as the nature of the invention is better understood, the same consists in the combination, arrangement and construction of parts hereinafter fully described, pointed out in the appended claim and illustrated in the accompanying drawings, it being understood that many changes may be made in the size and proportion of the several parts and details of construction within the scope of the appended claim without departing from the spirit or sacrificing any of the advantages of the invention.

Two of the many possible embodiments of the invention are illustrated in the accompanying drawings, in which:

Figure 1 is a longitudinal vertical section taken through a bellows constructed in ac- Speccation of Letters Patent.

Patented May 9, 1 916.

Serial No. 39,021.

cordance with the present invention; Fig. 2 1s a section taken on line 2 2 of Fig. 1, on a larger scale; Fig. 3 is a section taken on line 33 of Fig. 2; Fig. 4 is a section similar to the one shown in Fig. 2 with the parts in other positions; Fig. 5 is a longitudinal vertical section taken through a piston embodying the invention; Fig. 6 is ay similar section taken through the piston with the parts in other positions; and Fig. 7 is a section taken on line 7 7 of Fig. 6.

Referring now more particularly to Figs. 1 to 1, inclusive, the numerals 10 and l1 indicate the two boards of the bellows, united by sides 12 of thin leather or the like, thus forming a flexible air chest, which is in the well known manner alternately eX- panded and contracted. From the air chest leads a nozzle 13, as usual in constructions of this type. In the upper face of the board 11 is formed a recess 11, that is closed by a cover 15, the latter being attached to the outer face of the board 11, for instance, by screws 16. The closed recess constitutes, as will hereinafter appear, the valve chamber of the bellows. In the board 11 is formed a plurality of openings 17, in the present case two, through which the air chest is adapted to communicate with the valve chamber. In alinement with the openings 17 are provided in the cover 15 openings 18, through the latter being adapted to be established a communication between the valve chamber and the atmosphere. Around the openings 17 and 1S are formed within the valve chamber valve seats 19 and 20, respectively, said valve seats being made of rings ot felt. or of similar material, which are secured to the board 11 and the cover 15, respectively, for instance by a suitable adhesive. IVith the valve seats cooperates a valve 21. in the form of a plate member, that is loosely mounted upon a. valve stem 22, the latter extending through the board 11 and through an open ving 23 in a protuberance 2l on the cover.

The valve is provided with a small aperture 25, through which the stem4 22 extends, there being disposed upon said stem below the valve a collar 26, and above the same a collar 27. The collars are disposed at a distance from each other, to permit of a sliding motion of the valve upon the stem for a purpose hereinafter to be described. A spring 28 is coiled around the stem 22,

and bears against the collar 27 and the cover 15. The outer end of the stem, which projects through the opening 28, is pivoted at 29 to `an actuating lever 30, the latter being provided with a cam 31s that is adapted to coperate with the protuberance 24. To the board 1.1 is fastened a pin 32, projecting into the valve casing and being seated in a slot 33 in the valve. The move ment of the valve is guided by the said pin and slot. Y

From the foregoing it appears that the bellows includes a double face valve, having two opposed sets of seats, one set being formed above the valve and the other one below the same, and the valve being shiftable to coperate with either set of seats.

The operation of this device is as follows: 1f it is intende-d to use the bellows as a suction pump, for instance for sucking dust from the tracker bars of pla-yer pianos, a properly shaped cap 34 is put uponthe nozzle. This cap is pressed against the tracker bars. The lever 30 is set to permit the valve 21 to descend on its seats 19. The spring 2S will, upon the shifting of the lever into the positions shown in Figs. 1 and 2 of the drawings, force the valve onto the said seats. 1f now the air chest of the bellows is expanded, airy and dust is drawn into the same through the nozzle 13, the valve being forced by the atmosphere onto its seats 19, and unseated when the air chest is contracted, the air and dust being by the contraction expelled from the bellows through the openings 17 and 1S. l/Vhen the bellows is to be used as a force or compression pump, the lever 30 is shifted into the position shown in Fig. 4 of the drawings, whereby the stem 22 and the valve are raised and thus brought into operative relation to the valve seats 20. The cam 31, acting upon the protuberance 24, holds the valve in its raised position. W' hen in this position, air is drawn through the valve chamber into the air chest on the extension stroke and expelled through the nozzle when the said chamber is being compressed. fr current of air is thus produced for cleaning, for instance, the interior of pia-nos and other musical instruments. Attention is called to the fact that, when acting as a force or compression pump, upon extension the valve is kept a little distance below the seats 20, thereby permitting' ingress of air, and upon compression the said valve acts as check valve and is forced onto its seats 20.

1t is to be observed that while herein the bellows has been described as having two sets of registering openings, any other suitable number may be employed without departing from the invention.

The invention may be applied to piston pumps also. A construction of this pipe is illustrated in Figs. 5 to 7, inclusive, in which the numeral 35 designates a piston, having a recess 36, closed by a cover 37. This closed recess constitutes the valve chamber of thepump. rThe piston is provided with valve openings 3S, and in registering position therewith are made in the cover valve openings 39. lVithin the valve chamber are formed around the valve openings 38 and 39 valve seats 40 and 41, respectively, with which cooperates a double face valve 42 in the form of a plate member. This valve is loosely mounted between the flanges 43 and 44 of a nut 45, said nut having an extension 46, provided with a slot 47. In alinement with this slot is formed in the valve an aperture 42, and in the latter and in the said slot is seated a stationary pin 48. The pin, aperture and slot serve as the guiding means for the valve and nut, and prevent also a rotation of the nut. lVith the threads of the nut mesh those of a bolt 49, having a head 49 outside of the piston, its other end projecting into a bore in a piston rod 51, that is, preferably, fiXedly attached to said bolt, for instance by a pin 52. The operation of this device is as follows: By rotating the piston rod 51 in one or the other direction, the valve will be shifted into operative relation with one or the other set of valve seats. vVhen coperating with one set of seats, the pump will act as a suction pump, and when coperating with the other set, it will constitute a force or compression pump.

lt is to be observed that the two structures herein described are alike, the only difference between the two residing in the means for shifting the valve into operative relation with the two sets of valve seats.

What I claim is A valve casing having registering openings in opposite walls thereof, valve seats formed around said openings within said casing, a valve stem shiftably arranged in said casing, a valve loosely mounted upon said stem, means upon said stem for limiting the motion of the valve thereon, and means engaging said stem for shifting the same and thereby bringing, at will, said valve into operative relation with either valve seat. v

Signed at New York, in the county of New York, and State of New York, this 7th day of July, A. D. 1915.

ALEXANDER P. BROWN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C.

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