US527585A - Door check or closer - Google Patents

Description

(N0 Model.) v E. 1. BLOUYNT,

DOOR CHECK 0R CLOSER. A No. 527,585. Patented 055. 15. 1894.

Fal n Z f5? 3 YUNiTEny STATES EUGENE I. 'RLOUNE OE GARDNER, MASSACHUSETTS, ASSreNoR To THE RLOUNT MANUEAOTURINGr OOMPANMOE PORTLAND, MAINE. f

DOORoHEoK OR CLOSER.

SPECIFICATION forming part of Letters Patent No. 527,585, dated October 16, 1894. Application tiled December 27, 1893.l Serial No. 494,868. (No model.)

To @ZZ whom it may concern." f

Be it known that I, EUGENE I. BLOUNT, of Gardner, in the county of Worcester and State of Massachusetts, have invented certain new and useful Improvements in Door Checks 'or Closers, of which the following is a specification.

This invention has relation to means for regulating valves in reciprocating pistons, so as to govern the extent of the flow of iiuid through the port or ports in connection with which the valve operates.

As herein shown and described the improvement is illustrated in connection with a liquid door check and closer, though it will To these ends the invention consists inpro-l V viding the piston with an adjustable valve, i and equipping the casing with movable means extending to the outside, whereby the valve may be engaged and adjusted, all as I willv now proceed to describe in detail and out in the appended claim.

Reference is to be had to the annexed drawings and to the letters marked thereon, forming a part of this specification, the same letters designating the same parts or features, as the case may be, wherever they occur.`

Of the drawings-Figure lis a front elevation of a liquid door check and closer equipped with my improvement, the liquid cylinder and parts operating in connection point 4therewith being shown in longitudinal vertical section. In'this view the piston is represented as being drawn back and at or near the extremity of its rearward movement. Fig. 2 is a view similar to Fig. l showing the piston as at or near the limit'of its forward movement. Fig. 3 is an end elevation of the piston. Fig. 4 is adetail sectional view showing the manner of engaging the adjustable valve in the piston bymeans of the external means. Fig. 5 is a sectional detail view of the form of valve selected for explanation of the invention.

In the drawings-a designates the casingl of the spring chamber; b, the casing of the liquid chamber; c, the arm connecting the operative parts with the door; d, the spindle with which the spring (not shown) is connected, and which extends into the liquid chamber where it is provided with a crank e and pitman f, or other suitable means for reciprocating the piston g.

In liquid door-checks of this kind it is usual to provide means whereby when the door is opened the liquid\ may How from the rear to the front of the piston with freedom and without offering considerable resistance to the movement of the door, but when the latter is closing to resist its movement to a degree to prevent slamming by allowing the liquid to 110W only through a restricted port or passage-way.Y As the condition of the liquid changes with changes in the temperature of the weather and from other causes, it is necessary sometimes to adjust the valve controlling the restricted port or passage-way. As it is desirable under some circumstances and for some purposes to have the said port and valve in the piston, and that the device should not to any extent be taken apart to adjust the valve, I have, by my invention, provided means whereby the said adjustment may be effected by external means.v

In the present instance both the free and the restricted valve. are formed inthe piston, though the former may be made as a valvecontrolled passage-way connecting the ends of the portion of the liquid cylinder or chamber in which the piston operates, as is now sometimes done.

h designates the free or larger port formed in the pistong which port is controlled by an ordinary clapper valve j, shown as open in Fig. l and as closed in Figs. ,2, 3 and 4.

lo is the valve yfor controlling the restricted port and in which valve, in the present case,

the port is formed. The valve lc is constructed as a screw-valve, and is Iiuted or grooved in its sides as at Z to form ports for the passage of the liquid, though other suit- IOO able constructions may be provided with which a screw-valve is adapted to co-operate. A kerf or slot m. is formed in the outer end of the screw-valve, and a pin or plunger n having a sharpened inner end to engage the said kerf or slot is arranged in packed bearings in the casing, so that it may be thrust in to engage the screw-valve, as shown in Fig. 4, and turned to adjust said valve, as may be desired, and then drawn back, as shown in Figs. l` and 2, so as to be ont of the Way of the piston. Any suitable means may be provided Whereby the pin or plunger n cannot be wholly withdrawn or forced out.

By the means described I am enabled in a very simple manner to provide entirely efcient means for adjusting the valve in the piston Without taking the device apart, and with certainty and entire readiness.

Having thus explained the nature of the invention and described a Way of constructing and using the same, though Without attempting to set forth all of the forms in which it may be made or all of the modes of its use, it is declared that what is claimed is- A door-check and closer comprising in its construction a reciprocating piston, an independent adjustable slotted screw valve in the piston, an independent rotary and longitudinally movable pin or rod supported in the head of the casing and packed to prevent two subscribing Witnesses, this 20th day of December, A. D. 1893.

EUGENE I. BLOUNT. Witnesses:

ARTHUR W. CRossLEY, A. D. HARRISON.

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