US1131264A - Door-check. - Google Patents

Description

J. H. PEARSON.

DOOR CHECK.

APPLICATION FILED MAYzz, 1913.

,P l 3 lll. 26% Patented Mar. 9, 1915 ."uRR PETEHS C0 Pimm llrm/ v WAL/Hmmm D c OFFllFF.

JAMES II. IPEARSON, OF ST. LOUIS, MISSOURI, ASSIGNOR OF ONE-THIRD TO- GEORGE A. HAINES, OF BLOMFIELD, INDIANA, AND ONE-THIRD TO OSGEOLA CALVERT, 0F

SHELBURN, INDIANA..

DOOR-CHECK.

To all whom 'it may concern.'

Be it known that l, JAMES H. PnARsoN, citizen of the United States, residing at St. Louis, in the city of St. Louis and State of Missouri, have invented certain new and useful Improvements in Door-Checks, of which the following is a specification.

My invention relates to new and useful improvements in door checks and the object of my invention is to provide a device which will not only insure the closing of any door to which it may be applied but which will check and control such closing, causing the door to close smoothly. and gently and therefore avoiding the likelihood of breaking any panes of glass which may be set in the door.

A. further object of my invention is to construct a check of the above described nature which will also act to prevent the blowing open of the door when closed.

A further object of my invention is'to provide a door check which may be applied to the upper portion of the door and door casing and which, when in place, will be out of the way, the door check being mounted in such a manner that it may be readily removed from both the door and casing without necessitating the removal of any screws, bolts or other fastening devices and further so mounted that it may be detached from either the door casing or door and left attached to the door or door casing, the check thereby being rendered inoperative without the necessity of completely removing it from the door and casing.

A. still further object of my invention is to provide a door check which may be applied with equal effectiveness to doors which open to the right or to the left and also which may be reversed end for end.

Another object of my present invention is to provide means whereby the door check may be utilized to partially close the door and to then hold the door in its partially closed position, this locking means being adjustable whereby the door may be closed to any desired, predetermined extent.

lWith these and other objects in view, my invention will be more fully described, illustrated in the accompanying drawing,

Specification of Letters Patent.

Patented Mair. 9, 1915..

serial no. veaaie.

and then specifically pointed out in the claims which are attached to and forni a part of this application.

In the drawing: Figure 1 is a fragmentary perspective view of the upper portion of a. conventional door and door casing showing my improved door check applied thereto; Fig. 2 is a transverse sectional view taken through the door and its casing, showing thedoor check in top plan view, the d oor being shown in closed position in full lines and in open position in dot and dash lines; Fig. 3 is a central longitudinal sectional view taken through the body of my improved door check; Fig. 4 is a perspective view of the head which closes the outer end of the inner body portion of the door check and to which one end of each of the springs inclosed in the door check is attached; Fig. 5 is a similar view of the head closing the outer end of the outer body member, showing the manner in which the springs are attached to said head and also showing the valve controlling the passage of air into and out of the body member; Fig. 6 is a central longitudinal sectional View through that end of the body member closed by the head shown in Fig. 5, showing still further details of valve construction; Fig. 7 is a fragmentary longitudinal sectional view upon an enlarged scale, showing the employment of a split annular packing ring to prevent leakage of air from the body between the inner and outer members thereof.

Corresponding and like parts are referred toin the following description and indicated in all the views of the drawing by the same reference characters.

My invention, in its preferred form, primarily includes tubular outer and inner telescoping members 10 and 11 which together form the body portion of the door check and for the sake of clearness I have illustrated my improved door check, iii Fig. 1, as applied to a door 12 and door casing 13 of conventional form, one end of the door check being secured to the upper inner corner of the door by a bracket 14:, while the opposite end is secured to the opposite upper corner of the door casing by a bracket 15. The specic construction of the brackets and the manner of mounting the door check thereon will be described in detail in a later portion of the specification.

Referring more specifically to Figs. 3 to 7 inclusive of the drawing for the specific construction of the door check proper, it will be seen that the outer body member 10 consists of a tube of suitable metal, preferably brass, open at one end and closed at itsother end'by aheadindicated as a whole by the numeral 16. rlhis head includes a cup-shaped cap 0f metal V17 equal in diameter to the diameter of the body member 10 and a cylindrical member 18 of wood or other suitable material one end of which is wedged in the cap and the other end of which is adapted, when the head is in place, to extend within the body member 10. A bore 19 is formed transversely through the head adjacent its outer end and a smaller transverse bore 20 is formed through the cap and `into the member 18 of the head to communicate with a longitudinally extending bore 21'formed in the member 18 and opening through the inner end of the same, the bore 19 serving as a means for attaching the member 10 to the bracket 14, as will be later explained, while the communicating bores 20 and 21 form the passage through which the air enters and escapes from the body member. A hook 22 has a threaded shank 2`3'passed through a substantially rectangular shape strip 24 of leather or other suitable material and into the inner end of the member 18, the bore 21 and shank 23 rof the hook being diametrically disposed with respect to each other. rlhe leather strip 24 is thereby fastened with one end over the inner end of the bore or passage 21 and this end is free to move back and forth from the passage to permit the entrance of air into the body member and to check the escape of air therefrom. rThe ends of this strip 24 of leather, are rounded as shown at 25 to engage snugly against the inner face of the body member 10 in such a manner that the strip is held by this engagement and by the shank of the hook against vall swinging movement about the hook shank. The strip is provided with a relatively small perforation or opening 26 in alinement with the passage 21 through which the air contained in the body member may be gradually forced upon the contraction of said member. The hook 22 is so turned as to position its bill substantially in alinement with the passage 21 and the hook therefore serves as a cheek for limiting the inward movement of the free end of the valve formed by the strip 24 when air is being` drawn in through the passage 20-21 The head is secured in place in the end ofthe outer bodymember 10 by a screw or other fastening device 27 passed through the body member 10 and into the inner portion of the member 1S which forms in effect the body of the valve, inasmuch as the air passage is formed therethrough and the valve carried thereby.

The inner body member 11 consists of a cylindrical tube somewhat less in exterior diameter than the interior diameter of the body member 10 and telescopically mounted therein. The outer end of this inner body member 10 is closed by a head indicated as a whole by the numeral 2S. This head includes a cap of metal 29 corresponding to the cap 17 and equal in diameter to the diameter of the inner body member and a cylindrical member 30 wedged at one end in the cap and extending at its opposite end into the body member 11 in which it is secured by a screw 31. This head is provided with a transversely extending bore parallel to the bore of the head 16 and providing means for attaching the outer end of the inner body member to the bracket 15.

A hook 33 has its shank threaded into the inner end of the member 30 in the same manner in which the hook 22 is threaded into the member 18, the bight portions of these hooks being disposed centrally within the ends of their respective body members. helical spring 34 is provided at its ends with eyes 35 which engage the hooks 22 and 33 and a second helical spring 3G surrounds the first and is provided at its ends with eyes 37 which also engage said hooks. As will be readily understood the hook 33 may be swung to bring its bill out of alinement with the member 30 and thus permit the ready attachment of the spring eyes thereto, after which the hook may be swung back to the position shown in F ig. 4.

In assembling the door check, the springs are first attached to the hook 22, which may be easily done as they are then under no strain. The head of the outer body member is then applied to said member and the inner body member positioned within the outer body member, the springs being passed through and drawn out through the aid of a hook or other suitable instrument and engaged over the hook of the inner body head which is then positioned in the end of its body member and fastened in place. In order to insure a relatively easy movement of the inner body member within the outer body member it is necessary that the two members do not lit too closely together. At the same time it is essential that the chamber formed by the body members and included between the heads thereof be air tight, save for the passage 21 in order to provide an air cushion which will serve as a check upon the action of the springs 34 and 36. To accomplish this provide the inner body portion 11 adjacent its inner end with a collar 38 which fits loosely within the outer body portion and at its eXtreme inner end with a second collar 39 which lits still more loosely within the outer body member. Between these collars and surrounding the inner body member l place an annular packing ring 40 of leather, rubber or other suitable material of such thickness as to closely lill the space between the inner and outer body members. rlfhat end of this packing ring adjacent the collar 39 is slitted circumferentially as shown at 41 and, it will be apparent that when the body members have been extended and the chamber formed by said members filled with air, upon contraction of said members air passing the collar 39 will enter the groove or channel formed by slitting the inner end of the packing ring 40 and so force or spread the inner edge of the ring apart to bring it still more closely into engagement with both the inner and outer body members and form an absolutely air tight sliding joint. rlhe collars 38 and 39 being secured to the inner body member 11 prevent all longitudinal movement of the packing ring 40 upon said body member. Loosely surrounding inner body member 11 eXteriorly of the outer body member 10, is a collar 42 which may be tightened in adjusted position upon the inner body member by a set screw 43. This collar and set screw form an adjustable lock for limiting the action of the door check as will be later explained.

As previously described the door check is secured to the door and door casing by brackets 14 and 15, respectively. The bracket 14 includes a il-shape body member, the ends of which terminate in angularly disposed feet 44 perforated to receive screws 45 by which the bracket may be attached to the door. The bracket above described is always attached to the door with one of the feet at the upper inner corner of the door as shown and the peculiar V-shape construction of the bracket therefore serves to insure a uniform positioning of the bracket. As shown, the body portion of the bracket extends at right angles to the plane of the door and is provided with an upwardly directed, integrally formed pintle pin 46 proportioned to fit loosely in the bore 19 or the bore 32 of the door check as the case may be.

The bracket 15 includes a U-shape body member having a foot 47 perforated to receive screws 48 by which it may be attached to the door casing in the position shown in Figs. 1 and 2 of the drawing and the free end of this body member terminates in an integrally formed pintle pin 49 adapted to pass through the bore at the free end of the door check. The body portions of both of these brackets are provided with encircling ianges 50 to support the door check when the latter is mounted upon the pintle pins. Both the bores 19 and 32 are of the same diameter and the pintle pins 46 and 49 will t either bore. For this reason the door check may be mounted in the manner shown in Fig. 1 or reversed end for end or inverted without in the slightest way affecting its operation.

From the foregoing description, taken in connection with the drawing, the operation of the door check will be readily understood and but a slight description of the same is therefore necessary. When mounted upon the door as shown in Figs. 1 and 2 of the drawing, it will be apparent that any opening of the door tending to move the same to the position shown in dotted lines in Fig. 2, will act to extend the door check and therefore against the action of the springs 34 and 36 which are already under sufiicient tension to normally hold the door against being blown open. Assuming that the door has been opened and then released, it will be clear that the springs34 and 36 will tend to draw the body members 10 and 11 together and close the door. This closing, if accomplished merely by the action of the springs, would be abrupt and would cause the door to slam and it is for this reason that the body member is constructed to provide an air chamber. While the door was being opened a partial vacuum was formed in the body portion, causing an inrush of air through the passage 20-21 forcing the valve 24 inwardly until the air filled the chamber within the body member. As soon however, as the body member starts to contract under the action of the springs 34 and 36 the air in the chamber is compressed. forcing the valve 24 to its seat. Under these conditions, because of the split packing ring 41, the only escape for the air imprisoned in the chamber is through the small perforation 26 of the valve. For this reason the escape of the air from the chamber will be very slow and the action of the springs cushioned in such a manner as to insure a smooth and gentle closing of the door under the influence of the door check. lt will be noted that the air chamber and its controlling valve do not in any way affect the opening of the door as the inward movement of the valve completely opens the passage 20-21 which is large enough to permit the air to rush readily into the air chamber. 1f the door is to be held open at any predetermined point it may be readily accomplished by this door check by first opening the door to the extent desired and while the door is manually held in this position,

moving the collar 4:2to bear against the adjacent end of the outer body member 10 and then securing the collar in place by the set screw 43. 1t will be apparent that under these conditions the collar will prevent further contraction of the body member and that while the door may be more widely opened to permit persons to pass through it will close only to the extent desired and arranged for by the adjustment of the collar.

The above described door check may be used either upon the inside or outside of the door and upon doors that open either to the right or to the left. Either end may be attached to the door carried bracket and the other end to the casing of the door and the door cheek may at any time be inverted, if desired. Furthermore, either end of the door check may be freed from its pintle pin and the door check left hanging upon the pintle pin of the other bracket when the check is not required. Y Also, as will be apparent, the door check may be removed from its brackets without necessitating the removal of any screws, bolts or other fastening devices.

Although I have lillustrated my invention, in all its 'details of construction, it will of course be understood that I do not wish to limit myself to the specific details illustratedin the drawing or described in the specification as various minor changes, within the scope of the appended claims, may be made at any time, without in the slightest degree Ydeparting from the spirit of the invention.

Having thus described the invention, what is claimed as new is:

1. A door check including tubular body members telescopically mounted one within the other, a head closing the outer end of one body member and provided with a valve passage, a ia'p valve mounted on the inner end of the head and movable to open and close said passage, a head closing the outer end of the other body member, and springs connecting said heads.

2. A door check including tubular body members telescopically mounted one within the other, a head closing the outer end of one of the body members, a head closing the outer end of the other body member and providing with the first head and body members a variable air chamber, said latter head being provided with an air passage, a valve carried by the head and movable to open and close said passage, means for limiting the inward movement of said valve, and a spring extending through the air chamber and connected at its ends to the heads.

3. Adoorcheck including tubular .body

members telescopically mounted one within the other, a head closing the outer end of one of the body members, a head closing the outer end of the other body member and coaeting with the first head and body members to provide a variable air chamber, springs extending through the chamber and connected at their ends to the heads to normally hold the body members in contracted position, one of said heads being provided i with an air passage communicating with the chamber, and a valve carried by said head and movable to open and close said passage, said valve being perforated to permit slight escape of air from the chamber when the valve is closed.

4. A door check including tubular body members telescopically mounted one within the other, heads closing the outer ends of said body members and provided with transverse bores, springs connecting said heads, a valve mounted in one of the heads and controlling the passage of air into and out of an air chamber formed by the body members and heads, and brackets adapted for attachment to a door and door casing and provided with pintle pins adapted to engage through the bores of the heads.

5. A door check including tubular body members telescopically mounted one within the other, heads closing the outer ends ol said body members and provided with transverse bores, springs connecting said heads, a valve mounted in one of the heads and controlling the passage of air into and out of an air chamber formed by the body members and heads, brackets adapted for attachment to a door and door casing and provided with pintle pins adapted to engage through the bores of the heads, a collar adjustably mounted upon the outer end of the inner body member, and means for clamping the collar in adjusted position upon said body member to limit the telescopic movement 01"' the body members.

6. A door check including tubular body members telescopically mounted one within the other, heads closing the outer ends of the body members, springs connecting said heads, an air valve carried by one of the heads, an annular packing ring secured upon the inner end of the inner body member, and means for attaching the outer ends of the body members to a door and door casing.

7. A door check including tubular body members telescopically mounted one within the other, heads closing the outer ends of the body members and providing therewith a variable air chamber, a valve carried by one of the heads and governing the passage of air into and out of said chamber, springs connecting the heads to normally hold the Vbody members together, an annular packing a door and door easing.

8. A door check including telesooplng body members closed at their outer ends thereby (1o-acting to provide a Variable air chamber, means tending to hold the mem- 10 bers in contracted position, means controlling the passage of air into and out of the air chamber, and adjustable means limiting the telescopic movement of the body members.

In testimony whereof l aliX my signature in presence of two Witnesses.

JAMES H. PEARSON. [n s] Witnesses:

CosWELL H. JENNINGS, 'JOHN F. FREELAND.

@opina el this patent may be obtained for five cents each, by addressing the Commissioner of Patents? Washington, D. G.

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