US807709A

US807709A - Pneumatic sand-shaker.

Info

Publication number: US807709A
Application number: US13386402A
Authority: US
Inventors: Albert H Barber
Original assignee: Individual
Current assignee: Individual
Priority date: 1902-12-04
Filing date: 1902-12-04
Publication date: 1905-12-19
Anticipated expiration: 1922-12-19

Description

No. 807,709. PATENTED DEC. 19, 1905.

A. H. BARBER. PNEUMATIC SAND SHAKER.

APPLICATION FILED DEO.4,1902.

2 SHEETS-SHEET 1 UNITED STATES PATENT OFFIQF.

ALBERT H. BARBER, OF WATERTOWN, NEW YORK, ASSIGNOR TO ELMER ELSVVORTH HANNA, OF CHICAGO, ILLINOIS.

PNEUMATIC SAN D-SHAKER.

Specification of Letters Patent.

Patented Dec. 19, 1905.

Application filed December 4, 1902. Serial No.133,864.

' tion.

This invention relates to that class of mechanisms which is adapted to be used in connection with the screening of sand in foundries and similar places, and particularly to the construction and arrangement-of parts, as will more fully hereinafter appear.

The principal object of the invention is to provide a simple, economical, and efficient pneumatic sand-shaker.

Further objects of the invention will apear from an examination of the drawings and the following description and claims.

The invention consists principally in a pneumatic sand-shaker in which there are combined a spring-mounted riddle-holder for moving the parts in one direction and a fluidpressure cylinder provided with a reciprocating piston projecting out of one end thereof separate from and resting against the screen-holder to operate the parts in the other direction.

The invention consists, further and finally, in the features, combinations, and details of construction hereinafter described and claimed.

In the accompanying drawings, Figure l is a planview of a pneumatic sand-shaker constructed in accordance with these improvements looking at it from above; Fig. 2, a side elevation of the same; Fig. 3, an enlarged longitudinal sectional view of the fluid-pressure cylinder and attached parts shown separate from the riddle and holding mechanism in its retracted position; Fig. 4., a similar view with the piston at its extreme outer limit of movement Fig. 5, an enlarged cross-sectional view taken on line 5 of Fig. 3, and Fig. 6 an enlarged cross-sectional view taken on line 6 of Fig. 3 looking in the direction of the arrow.

In constructing a pneumatic sand-shaker in accordance with these improvements a split or clamping ring riddle-holder a is provided, in which a riddle 81 may be removably held. A clamping-screw c is used and passed through outwardly-projecting lugs d on the riddle-holder, by means of which the holder is clamped to the riddle or released therefrom. To yieldingly support the riddle-holder and at the same time actuate it, as well as the other parts hereinafter set forth, in one direction an inward onlytwo flat steel springs e are provided, riveted to the riddleholders at their upper ends and to the standards f and g at their lower ends. These standards are secured to a desired base portion h, which, as will be seen from an inspection of the drawings, acts to support all of the mechanism in position. To operate the parts in the other or outward direction, a fluid-pressure cylinder 11 is provided and suitably secured to the supporting-base by means of braces j, as shown in Fig. 2. Reciprocatingly mounted in the cylinder is a piston k, projecting out of one end thereof, se arate from, but contacting the riddleho der at its extreme rounded outer end. The main end of this piston is provided with a perforated shoulder Z, forming the piston head, the perforations m of which form a part of the passage-ways for the inlet and exhaust of motive fluid to and from the rear of the piston-head, as shown in Figs. 3 and 4..

To cut off and supply the motive fluid from and to the cylinder at the rear of the pistonhead, the cylinder is provided with inlet and exhaust openings n and p, and the piston is provided with a perforated ring-valve g, loosely and slidingly mounted thereon. The perforations 1" of this ring-valve act when the inlet-passage is open only as a part of the passage-ways for the inlet of motive fluid and never for the outlet thereof. The rear end of the cylinder is preferably closed by means of a plug t.

In operation, assuming the parts to be in the position shown in Figs. 1, 2, and 3, the motive fluid, as seen in Fig. 3, is entering through port n, passing through the perforationsr and m in the ring-valve and pistonhead, respectively, to the rear of such head. When sufficient motive fluid has entered the space between the rear of the piston-head and the rear end of the cylinder, the piston is moved outwardly, moving with it the riddle-holder and against the tension of its supporting spring mechanism until the ringvalve is moved to the position shown in Fig. 4. At this position the inlet-passage n is closed and the exhaust-passage p opened, all

of which permits the motive fluid behind the piston-head to exhaust through passages m and 19, respectively, the potential energy of the riddleholdersupporting spring mechanism acting to return the parts to the position shown in Fig. 3. These operations are continued over and over as long as motive fluid is supplied to the cylinder.

I claim 1. In a pneumatic sand-shaker, the combination of a spring-mounted riddle-holder for moving the parts in one direction, and a fluid-pressure cylinder provided with a reciprocating piston projecting out of one end thereof separate from and resting against the screen-holder to operate the parts in the other direction, substantially as described.

2. In a pneumatic sand-shaker, the combination of a riddle-holder, spring mechanism upon Which it is yieldingly supported for moving it and other parts in one direction, a fluid-pressure cylinder, and a reciprocating piston in such cylinder contacting the riddleholder and arranged to be moved and move the riddle-holder in one direction only by the fluid under pressure and in the other direction by the riddle-supportin spring mechanism, substantially as described.

3. In a pneumatic sand-shaker, the combination of a riddle-holder, spring mechanism upon which such riddle-holder is yieldingly supported and by which it is moved in one direction, a fluid-pressure cylinder, a reciprocating piston in such cylinder extending out of one end thereof separate from but ,C-Qntacting the riddle-holder to move it in the direetiornopposite, to 7 the spring movements only and in turn to be'moved in the opposite direction by the supportingspring.

mechanism of the riddle-holder, anda valve,

for such piston to cut OE and supply motive= fluid thereto to move such piston in one direction only, substantially as described.

4. In a pneumatic sand-shaker, the-combination of a riddle-holder, spring mechanism upon which it is supported and by which it is moved in an inward direction only, a fluid-pressure cylinder, a reciprocating piston separate from but contacting said holder to move it in an outward direction only and in turn be moved inwardly by the riddle-supporting spring mechanism, and a valve slidingly mounted in said piston to cut off and supply motive fluid to said cylinder to operate the piston outwardly only, substantially as described.

5. In a pneumatic sand-shaker, the combination of a riddle-holder, a fluid-pressure cylinder provided with inlet and exhaust openings, a piston projecting therefromto contact and operate the riddle-holder in one direction only provided with a perforated shoulder on its rear inner end, a longitudinally-perforated ring-valve slidingly mounted on the piston to alternately open and close the exhaust and inlet openings to exhaust motive fluid from and admit it to the rear of the piston to operate it in one direction only, and means for moving the riddleholder and thereby the piston in the 0 posite direction, substantially as describe 6. In a pneumatic sand-shaker, the combination of a riddleholder, a fluid-pressure cylinder provided with inlet and exhaust passages, a reciprocating piston in such cylinder extending out of one end thereof to move such riddle-holder in an outward direction only, a perforated shoulder secured to the rear inner end of the piston forming the piston-head and a part of the passageways for the inlet and exhaust of motive fluid to and from the rear of the piston, a perforated ring valve loosely and slidingly mounted on the piston between the head and body portion to alternately open and close the exhaust and inlet openings and form a part of the passage-ways for the inlet of motive fluid to operate the piston in an outward direction only, and means for moving the riddle and thereby the piston in an inward direction only, substantially as described.

7. In a pneumat c sandshaker, the combination of a screen movably mounted, spring mechanism connected with such screen for moving it in one direction, a fluidpressure cylinder, and a piston mounted in such cylinder movable by means of fluid under pressure in one direction only and in the opposite direction by means of the screenoperating spring mechanism and operatively connected with the screen for moving it in the opposite direction to that in which it is movedxby means of the spring mechanism.

8. In a pneumatic sand-shaker, the combination of a riddle-holder, spring-standards supporting the riddle-holder, a fluid-pressure cylinder, a piston in the cylinder contacting at its outer end with: the riddle-holder, and fluid-pressure means for moving the piston in an outward direction only, the piston being returned by the pressure of the springstandards.

ALBERT H. BARBER. Witnesses:

CHARLES BLAKE, BERT MILLER.-