US 2063526 A
Description (OCR text may contain errors)
W. F. SNOWDON DOOR CHECK Filed Dec. 12, 1935 INVENTOR. M/flam/f''nawahm ATTORNEY.
.....m...=. .h..=m. u m b k M m 3 MN iatentecl Dec. 8, 1936 UNITED STATES PATENT OFFICE 10 Claims.
The purpose of this invention is to simplify the construction of door checks in order to reduce the cost thereof without sacrificing efiiciency, and at the same time provide a door check that is efficient in its action, and which will withstand the severe conditions to which such a device is subjected.
The invention is a door check formed of a tubular casing with springs, a friction retarding element, and a wedge therein in which one end of the casing is pivotally held to the door frame and a rod extending from the other end is pivotally attached to the door, and the interior is arranged so that as the door opens the spring is readily compressed so that it may be easily opened, and as the door is released the spring automatically closes the door and at the same time forces the wedge into the friction element which bears against the inner surface of the 20 casing retarding the closing of the door until the friction element reaches an enlarged part of the casing at which time it is released so that a gradual and positive final closing movement of the door is obtained, without danger of slamming, as the device is under adjustable control, during the whole closing movement.
The object of the invention is, therefore, to simplify the construction of door checks to such an extent that they are practical for use on substantially any door.
Another object is to provide a combination spring and friction door check in which the friction may readily be adjusted.
Another object is to provide a door check having a spring element in which the compression of springs therein may readily be adjusted from the exterior of the casing.
And a further object is to provide a combination spring and friction door check which is of a simple and economical construction.
With these ends in view the invention embodies a tubular casing with an enlarged end, with a door frame connection at the large end and a door connection at the opposite end, a rod extending from the door connection into the casing, springs on the rod, a wedge also on the rod, a friction element acted upon by said wedge and adapted to hold against the interior of the casing, means adjusting the relation of the wedge to the friction element from the exterior of the casing, and means adjusting the compression of the springs.
Other features and advantages of the inventionwill appear .from the following description taken in connection with the drawing, wherein- Figure 1 is a View showing a longitudinal section through the casing with parts shown in elevation.
Figure 2 is a similar view with parts broken away and with the friction element drawn partly through the casing by the opening movement of the door.
Figure 3 is also a similar view showing a part, only, of the casing, with the friction element as it would appear as the door is closing.
Figure 4 is a View showing a cross section through the friction element and wedge.
Figure 5 is a detail showing a bracket for holding one end of the casing to the door frame.
Figure 6 is a detail showing a longer bracket for attaching the opposite end of the device to the door.
Figure 7 is a view of applicants device applied to a door.
Figure 8 is a plan view showing an alternate design in which one end of the casing is attached to the door jamb.
In the drawing the door check is shown as it may be made wherein numeral I indicates the casing, numeral 2 a bracket for attaching one end of the device to a door frame, and numeral 3 a bracket for attaching the opposite end of the device to a door.
The casing I is formed with an enlarged portion 4 at one end having a closure 5 with a road 6, having an eye I at the outer end, fixedly mounted therein and extending from the end of the casing. The eye is placed over a pin 8 on the bracket 2 which is fixedly attached to the door frame 9 by screws Ill, and the eye may be held on the pin by a cotter pin or the like, II. A cap 12 forming a spring controller is threaded on the opposite end of the casing and a head I3 is held in the end of the cap by screws [4 forming a closure and also a seat for the springs 15 and It. The springs are positioned around a sleeve l1 slidable on a rod 18, one end of which is pivotally attached, through an eye on the end thereof to a pin l9 on the bracket 3, and the other end of which is attached to a wedge in the friction element which is formed by two semi-circular segments 2| and 22. These friction elements may be made of Wood or any suitable material. The bracket 3 is attached to the rear portion of a door 23 by screws 24 and the eye, which is indicated by the numeral 25, is held .by a pin 26. The outer end of the sleeve I1 is threaded and provided with a slot 21 and pins 28 and 29, mounted in the rod l8 extend into the slot at both sides and engage the sides of a knurled or milled nut 30 screwed on the sleeve, and it will be noted that as this nut is turned it screws back and forth on the sleeve and moves the sleeve lengthwise on the rod thereby adjusting the position of the friction element in relation to the wedge.
The friction element is positioned in the enlarged portion of the casing when the door is closed and the wedge 20 is formed or pinned on the rod I8, and with the members in the position shown in Figure 1 the wedge has been freed from the elements as the friction elements or segments 2| and 22 have moved outward into the enlarged part of the casing. A light spring 3| is provided at the inner end of the rod IS with one end engaging a plate 32 at the end of the friction element and the other resting against a plate 33 held on the end of the rod by a pin 34. As the door is opened the wedge 20 is withdrawn and moves forward and the segments 2| and 22, which are located in relation to each other by pins 35 and 38 extending from the segment 2| into openings in the segment 22, will be crowded inward by the smaller diameter of the casing, however the parts will travel freely during the opening movement of the door. This movement also compresses the springs I5 and I6, one end of which bears against the head of the cap and the inner ends of which bear against a plate 31 held by a pin 38 in the rod extending through slots 39 in the sleeve, and as soon as the door is released the friction element moves up on the wedge and the inclined surfaces of the wedge will act against the similarly inclined surfaces 40 and 4| of the segments 2| and 22, thereby forcing the segments against the inner surface of the casing and retarding the closing of the door. The amount of friction may be regulated by a member 42 on the inner end of the sleeve H which engages the ends of the segments 2| and 22 and the position of this memher is adjusted by the nut 30. The compression of the springs may be adjusted by screwing the cap I 2 back and forth on the casing.
In Figure 8 the device is placed on the outside of the door, and the outer end of the rod I8 is pivotally attached to the door jamb by the long bracket 3, and it will be noted that as the door opens and closes the action of this device will be similar to that of the arrangement shown in Figures 1 and 3.
I am aware that mechanically produced friction has been used to retard the closing movement of a hinged door therefore, I do not claim such a device broadly, but what I claim as new and desire to secure by Letters Patent, is:-
I. In a door check of the type having a tubular casing with a friction element and springs therein, and in which one end is attached to the door and the other to the door frame, two segments forming the bearing surfaces of the friction element, a wedge positioned between said segments and by which they are forced outwardly, and means for adjusting the compression of the springs from the exterior of the casing, said casing having an enlarged portion providing means for releasing said friction element as the door closes.
2. In a door check as described in claim 1, means on the exterior of the casing for adjusting the friction of said friction element.
3. A door check comprising a tubular casing having an enlarged end, a friction element comprising two segments slidable in said casing, a wedge positioned between said segments adapted to hold said segments against the inner surface of the casing during the closing movement of a door upon which the device is mounted until the element reaches the enlarged end of the casing, and means operating said wedge and elements from the exterior of the casing.
4. A door check of the type having a tubular casing with one end attached to the door frame and the other to the door, said casing having an enlarged inner end, a cap threaded on the opposite end of the casing, a head in said cap forming a closure for the casing, a sleeve slidable in an opening in the center of said head, a rod slidable in said sleeve having an eye at the outer end thereof, a bracket adapted to be attached to a door having a pin over which said eye is positioned, a wedge fixedly mounted on the inner end of said rod, friction segments having inclined inner surfaces corresponding with the surfaces of said wedge positioned about the wedge, means for adjusting the position of the segments in relation to the wedge from the exterior of the casing, resilient means resisting the opening of the door and urging said segments and wedge toward the enlarged end of the casing, and means attaching the enlarged end of the casing to the frame of the door.
5. A door check as described in claim 4, in which the resilient means comprises springs positioned in the casing and about said sleeve.
6. A door check as described in claim 4 in which the segment adjusting means comprises a member on the inner end of the said sleeve engaging the ends of the segments, and a nut threaded on the outer end of said sleeve positioned between two pins in the rod extending through slots in the sleeve.
7. A door check as described in claim 4 in which the resilient means comprises two springs, one positioned inside of the other and both acting against a head in the outer end of the casing and a plate adjacent the friction element and held by a pin mounted in the rod and extending through slots in the sleeve.
8. A door check as described in claim 4 in which the friction segments are made of wood.
9. A door check having in combination a spring for urging a door toward the closed position and a friction element for retarding the closing movement of the door, in which the friction element comprises a plurality of members having inclined inner surfaces and a spreading member adapted to force the surrounding plurality of members against the inner surface of a surrounding casing, means releasing said plurality of members as the door closes, and means for adjusting the compression of the springs from the exterior of the casing.
10. In a door check of the type having a tubular casing with a friction element and springs therein, and in which one end is attached to the door and the other to the door frame, 'two segments forming the bearing surfaces of the friction element, a wedge mounted on a rod extending out of the casing and positioned between the segments, and means for adjusting the compression of the springs from the exterior of the casing, said casing having an enlarged portion providing means for releasing said friction element as the door closes and said rod extending from the casing to provide means for attaching the casing to'a door.
WILLIAM F. SNOWDON.