US1824217A - Door hinge - Google Patents

Description

Sept. 22, 1931. F. KREINER DOOR HINGE Filed June 4, 1930 I /h venfor': A red hc i Patented Sept. 1931 mm, o

' DOOR HINGE Application fled June 4, Serial Io.

This invention relates to combined door hinges and checks of the type having a closing spring and braking means comprising a fluid container associated with one of the [leaves of the bin connected by a piston rod to one end of the closing spring.

One object of the present invention is to provide a door hin and check havin means 10 for enabling the raking actionto' rendered ineffective duri the last part of the closing motion, so that uringthis art of the closing motion, the door will on y be subject to the action of the spring. B this means even large doors will be close with certainty, even when under the'pressure of wind.

Another object of the invention is to provide a door hinge and check in which the braking means can also be adjusted so as to be effective almost up to the end of the closing motion, so that the door ma be made to close gently, as is desirable in .t 0 case of single house doors, so that the same door hinge and check can be used for doors which are difficult to close as well as easy to,close, independently ofthe amount by which the closing spring is stressed.

In the accompanying drawings a constructional example of the invention is shown,

Figure 1 being an elevation of the selfclosing door hinge. Fig. 2a longitudinal section, and Figs. 3 to 7 cross-section through the door hinge on lines AA, BB, (BC, DD, EE, of Figure 2.

Referring to the drawings, the bin is provided with two leaves 1, 2, each ofw ich has an integral knuckle 3, 4, respectively, formed in known manner by rolling or curling. The lower end of the knuckle 4 is closed b a solid plug 5, the closure being rendere pressure-tight by means of a sealing ring 6. A piston 7 is slidabl arranged inside the knuckle 4, said piston aving two opposite-handed helical slots 8, the upper ends of which mer horizontally extending slots 8a (Fig. 7). In the lower end of the pistonis ball valve 11 which is arranged so as to open outwardly and is held ge and a piston operatively 459,132, and in emmi Inc 1:, 1029.

a retaining spring 10. When the piston is in its bottom posit1on, the end of a screw 12 which is screwed into the plug comes into contact with the spring 10. The screw 12 has an adjusting spindle 13 ex- 5 tending through the plug 5 to the outside and provided with a knurled head 14, so as to enable the screw 12 to be turned to protrude into the space 15 of the cylinder below the piston by an adjustable amount. By this 5 means the moment when the screw 12 will come into contact with the sprin 10 of the ball valve canbe varied. In order to prevent any possibility of braking fluid escapi-ng between the spindle 13 and the hole in the plug 5 through which the s indle is passed, a gland 16 is provided in t e end of the lug 5. The upper'end of the hinge knuc e 4 is closed by an intermediate piece comprising-two screw-threaded portions 18 18a on either side of a central rtion 17 o in position by larger diameter having radial oles 17' for engagement by a s anner wrench. The portion 18 is screwed into the knuckle 4, the joint being sealed by means of a packing" ring 19. The other screw threaded portion 18a. of the intermediate piece is screwed into a hollow cylindrical member 20 which extends into the knuckle 3, so as to be a loose fit therein. The portion 18a of the intermeso diate piece has an extensiin 21 with a slot 22 therein and the intermediate piece has a hole 23 through which extends a piston rod 24. The lower end 24a of the piston rod 24 is of larger diameter and has a cross-bar 25 inas tegral therewith, the ends of said cross-bar engaging in the slots 8, 8a of thepiston 7. The piston 7 is prevented from being turned by the piston rod 24 by means of two longitudinal ribs 26 on the inside wall of the 00 knuckle 4 (Fig. 5), said ribs being-in sliding enga ment with guide grooves in the wall of t e piston. Escape of the braking fluid through the hole 23 in the intermediate piece 17, 18, 18a is prevented by a packing gland 27. 4

The upper part 28 ofthe piston rod 24 is of square section and projects beyond the u per end of the knuckle 3, which latter is closed by a plug 29 having an eight-cornered hole 29a (Fig. 6) through which the part 28 of the piston rod is passed. Two diametrically opposed' projections 30 on the plutgl 29 (Figs. 1 and 6) engitge in slots .31 in e upper end of the knuc e 3, the plug 29 being secured in position bfy a nut 32 screwed on to the upper end the piston rod, which is screw-threaded for this pur- 7 pose. A helical spring 33 surrounds the rod m 24, the lower end of said spring engaging in the slot 22 in the extension 21 of the mtermediate piece 17, while the upper end engages in a hole 33a in a part 34 of a stepped member 35.

The upper part 35a of the member 35 is hexagonal and extends into a corresponding recess 36 in a securing ring 37 (Figs. 2 and which is inserted in the knuckle 3 and prevented from turning by two projectlons 38 which engage in the slots 31 in the knuckle 3. The member 35 is also provided with holes- 356 for a spanner wrench, the knuckle 3 and the pivot being slotted at 39 (Flgs. 1 and 4) to enable access to-be obtalned to the holes 356.

The door hinge and check operates as follows:

The leaf 2 is mortised into the door post and the leaf 1 into the door. On the door being opened and the leaf 1 being turned on [the member 20 relatively to the fixed intermediate piece 17, 18, 18a and the leaf 2, the knuckle 3, by means of the projections (Figures 1 and 6) will turn the plug 29 round with it. By means of the projection 38, the knuckle will turn the ring 37, the recess 36 of which embraces thehexagonal part a of the member 35, thereby turning the latter and applying a torque to the spring 33, the lower end of which is prevented from turning b engagement with the art 21 of the fixe intermediate piece 18 w ereby the spring is stressed. The rod 24, the squarepart-28 of which is engaged as by the flug 29 turns, together with the latter. I the angular position of the crossbar 25 is such that the cross-bar is opposite the entrance to the helical slots 8 (Fig. 7), the cross-bar will travel in the slots 8 and I. move the: iston 7 upwards along the ribs-26. The oil within the piston 7 and that inthe space above the piston 7 in the knuckle 4 will, thereby, be forced through the ball valve 11 into the space 15 below the iston ll 7,'the ball su ported on the sp 10 in forced downv dardly. On the d db l being r5 leased, the spring 33 will relax, that 15 to say it will turn the member 35 back again to its initial position and the hexagonal head 00 350 will turn the ring 37 round with it, the

projections 38 will transmit the rotary motion to the knuckle 3 and thus to the door. At the same time, the plug 29 will turn back with the rod 24 and the bar 25 will force the 68 piston 7 downwards again. The valve 11 is so constructed-that it oflersmoreresistance to the return flow of the oil into the ace 40 above the piston 7 than to the inow of the oil into the space 15 under the piston, so that a braking action is produced and shortly before the piston 7 reaches its lowest pasition the spring 10 will screw 12 and there y almost completely close the ball valve 11, so that. the descending piston 7 will be more strongly braked shortly before its dead centre, that is shortly before the door lock snaps to. When the braking action is to be made entirely inefiective through a considerable angle, the plug 29 on the square part 28 is removed and the piston rod is turned (in the present example throu h so that the cross-bar will occupy t e position indicated by 25 in Figure 7, which is made possible by the horizontally extending grooves 811. The plug 29 is thereu on replaced and screwed down ti htly. 8 opened through a out 90, the s ring 33 will be stressed duringthe whole 0 the opening angle, but the piston will be raised only during the second half of the opening angle. In a corresponding manner the door is braked during the closing motion until it has reached a closing angle of 45.

When this position is reached, the crossbar 25 leaves the helical grooves 8 and enters the horizontal grooves 811, that is to say the strike the n the door being braking action already ceases at this positi n and the, door, which is now only su ject to the force of the closing spring 33, is closed by the ring without being braked. The angle o displacement of the cross-bar 25 with respect to the piston 7 depends on the square part in the plug 29. In the present case a star shaped eight cornered hole is provided, but of course a twelve cornered hole might be used, which will allow of a displacement through 30. The displacement and the locking of the square part 28 in the plug 29 can also be efiected by other means, for instance b inserted pins and with a finer anlar su -division.

What I claim is-- A combined door hinge and check, comprising in combination a pair of leaves, a closing spring having its ends secured respectively to said leaves, a fluid container associated with one of said leaves, a nonrotatable brake piston slidable in said container and having alguldeways therein extendmg in part helic y and in part parallel to a plane normal to the longitudinal axis of the piston, a piston rod having a cross-bar thereon in engagement with said guideways,

a. closing cap secured on the other leaf, said closing cap and the end of the piston rod re- 7 'mote from the piston having mutually en-- gaging securing means for adjustably se curing the said end of the piston rod to-the second mentioned leaf with the cross-bar of the piston rod in various angular positions with respect to the piston so as to enable the cut of the cross-bar with helic y extending part of the 'dewa to 'take place at different peri of t ogening movement of the door, as and for t e purposes set forth. w In testimony whereof I have signed my name to this s ification. r

RIEDRIGH KREINER.

Images