US380367A - Door-check - Google Patents

Description

E. TYDE'N.

DOOR GHBGK.-

(No mdelg) Patented Apr. 3, 1888.

N. PCTERS. PLm-mhogmher, wnhingmm at:

iran Srarns PATENT rtree.,

EMIL TYDEN, OF CHICAGO, ILLINOIS.

DOOR-CHECK SPECIFICATIGN forming part of Letters Patent No. 380,367, dated April 3, 1888.

Application filed August B, 18E?.

T @ZZ whom, it may concern:

Be it known that I, EMIL TYDEN, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a certain new and useful Improvement in DoorGhecks, of which the following is a full, clear, concise, and exact description, reference being had to the accompanying drawings, forming a part of this specilication.

My invention relates to door-checks in which a rubber buffer is made to come in Contact with the door, and thus secure the door in any position desired.

It consists of an improved mechanism designed, among other things, to obviate the liability of breaking when the door is suddenly moved and to restore the parts to their inoperative position automatically when the check is not in use. Y

In the accompanying drawings, illustrative of my invention, Figure l is a partscctional and broken side elevation of a check fitted to a door, the door being closed. Fig. 2 is a section of the check on the line w ze of Fig. 8, the door being open. Fig. 3 is ascctional view of the cheek on the line c x of Fig. l. Fig. 4L is a sectional view of the check on the line y y of Fig. 3. Fig. 5 is a front View ofthe door-plate, to which is pivoted the tumbler for support ing the plunger when in an inoperative posi tion. Fig. 6 is a sectional view ofthe plunger, its casing, thc tumbler, and the door-plate, taken on the broken linezzof Fig. 1. Fig. 7 is a detail View of the roll carried on the lower end of the plunger. Its rubber tire is shown in section. Fig. 8 is a part-sectional broken front elevation of a check modified for use on the outside surface of a door. Fig. 9 is a lougitudinal section of the saine, taken on the line a u of Fig. S.

Like letters indicate similar parte throughout the several views.

A is a hollow tubular easing inserted in a holein the door, as shown, and having a liange whereby it may be secured within this casing A. A plunger', B, provided with guiding-surfaces, has a limited perpendicular motion between corresponding guiding-surfaces in the casing. In the preferred form, as shown more particularly in Fig. 3, a cross-head, Z), which forms the lower end of the plunger B, works between projecting guidesurfaces a a in the lower end of the casing A, while the upper end of the plunger is produced in the form of a cylindrical shank, b', which operates through the aperture a in the casing. A spring, B, is coiled about the shank b and abuts at one end against the upper internal end of the casing and at the other against the crosshead b of the plunger. This spring is of considerable stiffness and placed normally so as to force the plunger downward.

Between the projecting arms of the crosshead b, at their lower extremity, is axled the pressure-roll C. As represented in Fig. 7, this roll is formed with a grooved periphery, in which is firmly cemented a tire of ruhber or other resilient material. Projecting from the side of the roll and integral therewith is a long thin eccentric cam. Against the dat periphery of this cam is pressed the spring D, maintained in constant pressure against it under considerable tension by being passed under and seated against the cross-bar bsituate between the cam-lug and the lug 1)*,which supports and secures the spring D in the crosshead b of the plunger B,tl1is end of the spring being slightly curved over and into the -cavity in the lug b4 to prevent its slipping from its proper position in the cross-head.

From the plunger B outwardly toward the surface of the door is extended a horizontal lug, b5. Its action will be more clearly understood by reference to Figs. 5 and 6, in which E is a dat platelet into the surface of the door. It serves the purpose of supporting and concealing a tumbler, F, pivoted to it by the rivet f. This tumbler is overweighted at one end and maintains normally the position shown in Fig. 5. At the other end a foot-lug projects through a slot in the plate E and affords means by which the tumbler may be operated, and also limits its motion so as to maintain it in an operative position. A projecting lug,

f2, extends inwardly from the weighted end of the tumbler at such apoint as to he in the path of the lug b5 of the plunger B, by which it is acted upon in its upward course.

The mode of action of the complete check will now be described.

In Fig. l the plunger is represented in its inoperative position,the door being closed and the roll C resting on the door-sill, while the tumbler,shown in seetion,occupies its normal ICO position, with the lug f2 beneath the lug b5 of the plunger. The door is now opened to the desired distance, the foot is pressed on the lug f', and the tumbler F operated. releasing the lug b5 from the lug f2, and the plunger descends and is pressed with a force against the floor sufficient to maintain the door in position against any ordinary wind or other eX- ternal force. The foot is removed from the lugf,and the tumbler returns by virtue of its weighted end to its normal r position. If through inadvertence or in ignorance that the check is in use the door be now violently closed, there will be no resultant injury, as would be the case were all parts of a rigid character. The following movements take place: The 'resistance of the spring D is vovercome by the eccentric cam in the side of the roll, and the roll rotates as it is forced by the closing ofthe door along its path over the tloor, the strength of thespring being so proportioned that an ordinary wind-pressure will have no effect upon it; but for a force in excess of this it yields readily, and the accidents to which it would be liable were it a fixed buffer are avoided. As the door in closing approaches its frame, the roll reaches the door-sill, and,

mounting its inclined face, forces the plungerv up, compressing still further the spring B, until iinally, when the door is completely closed, the roll rests upon the top of the sill, the lugf2 engages the lug b5, and the check is once more in the position from which itstarted. Vhen the roll begins mounting the sill, it is easily seen resistance is produced against the closing ofthe door,since this act necessitates the compression ofthe spring B. A moderate pressure is thus produced,which takes up the shock of closing, and the door finally comes to rest in its frame Without slam orjar.

In the foregoing I have described the action of the check when the door has been closed inadvertently. In fact, however, the action of the 'check is identical in closing the door in the ordinary manner, no attention being paid to the check, as in the preceding, the plunger being automatically returned Within its casing and there held, as described, by the tumbler. The door may now be opened and shut at pleasure, the check being inoperative until the tumbler is once more operated and the plunger released. The rubber tire of the roll Gserves to increase the friction of the roll with the floor their surfaces.

and prevents cutting ofthe carpet as it revolves over it.

Figs. 8 and 9 show a form of casing modified to provide for doors not thick enough to receive the casing previously described Within The casing here shown is provided with screwlugs, whereby it may be attached to the external surface of the door. It

is evident that in this modification no doorplate is necessary, the tumbler being pivoted on the frame itself. In somecases where it is undesirable to have a door-sill or even a camblock by which to automatically elevate the plunger out of action, it will be necessary to provide means for elevating the plunger by hand. This is done by extending the shank b of the plunger through the top of the casing and there arranging a convenient hand-hold, which I have shown in this construction as a lug, b,

I do not limit myself to the exact forms which I have shown and described, but claim and desire to secure by Letters Patent- 1. In a door-check, the -combination of a roller having a cam on one side with a spring attached to the frame and bearing against the cam, so as to permit of rotation under considerable pressure.

2. In a door-check, the combination ofa plunger with a downwardlypressiug spring thereto attached, a roller j ournaled on the end of said plunger and provided with a cam on one side, and a spring secured to the frame and adapted to bear against said cam to permit of rot-ation of the roller under pressure.

3. In a doorcheck, the combination of a vertically-reciprocating plunger having a side lug with a pivoted Weighted catching Whereby the plunger may be caught and held in an elevated position.

4. In a door-check, the combination of a vertically-reciprocating plunger with a spring which forces it downward, a lug in the side of said plunger, and a catch-lug on the door, whereby the plunger may be locked in an elevated position.

In witness whereof I hereunto subscribe my Ico name this 23d day of July, A. D. 1887.

EMIL TYDEN.

lwfitnesses:

CHAs. L. BARTLETT, FRANCIS W. PARKER.

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