US1218197A

US1218197A - Door-check.

Info

Publication number: US1218197A
Application number: US9120016A
Authority: US
Inventors: Eben H Mackinlay
Original assignee: Individual
Current assignee: Individual
Priority date: 1916-04-14
Filing date: 1916-04-14
Publication date: 1917-03-06
Anticipated expiration: 1934-03-06

Description

I E. H. MACKINLAY.

DOOR CHECK.

APPLICATION FILED APR. I4, 1916.

Patented Mar. 6

WW Y

la Zz 21H/1a.) Je Q door, when the door is the line 1f-4 of F Doon-ormai;l y

Application filed April 14., 1916. Serial No. 91,200.

To all 'whom z't may concern.'

Be it known that I, EBEN H. MACKINLAY, a subject of the King of England, residing at Calgary, in the Province of Alberta, Do minion of Canada, have invented certain new and useful Improvements in Door- Checks; and I do hereby declare the following to be a full, clear, and exact description of the invention', such as will enable others skilled in the art to which it appertains to make andI use the. same.

This invention relates to improvements in door checks.

One .object of the invention is to provide a novel and simple device of this character wh'ch is adapted to be applied at the hinge site of the door to prevent banging of the mounted on spring hlnges.

vAnother object is to provide a device of this character which is simple in construction, and one that can be manufactured and installed at a comparatively low cost.

Other objects and advantages will be apparent from the following description when taken in connection With'the accompanying drawing.

In the drawing:

Figure 1 is an elevation of a portion of a door and frame, broken away to show my invention in elevation;

Fig. 2 is an enlarged horizontal sectional view on the line 2-2 of Fig. 1;

Fig. 3 is an enlarged horizontal section on the same line, but showing the door in open position,

and the device ready for action when the door is to be moved into closedA position; A

Fig. 4 is an enlarged vertical section on 1g. 1. Referring particularly tothe accompanying drawing, l0 represents a portion of the door which isI mounted on the frame 11 by means of the spring hinges l2 in the adjacent edge of the door, andv at a point approximately intermediate the hinges there is formed a mortise 13 into which is inserted a tubular member 14, the bore of which has a spiral groove 15 formed throughout a portion of the length thereof and intermediate the ends. Thus, the outer portion of the bore, as well as, the inner portion is smooth. A flange 16 is formed on the outer end of and is countersunk door. opening the tubular member 14 in theedge face of the 'Specification of Letters Patent. y

the door being partially.

v EBEN H. MxoxiNLAr, or CALGARY, ALBERTA, CANADA.

Patented Mar. e, 1917.

Y 17-is formed in and receives therein a plug 1,8, the marginal portion of which projects beyond the end of the tube and is held from voutward movement fromv the tube byailange 19 which engages the inner face. of the endY of the tube.

recess 20 is formed in theinner end of the plug to receive the head 21 of a bolt 22 'which extends longitudinally and centrally through the tube. l Disposed within the center of the tube is a cylindrical member 23 having a spiral rib 24 on its peripheral face, which engages iii the spiral groove 15. Encircling the bolt 22, and bearing with its opposite ends respectively against the inner face of the plug and the outer end of the cylindricalvmember 23 is a strong coil spring 25 which acts as a buffer when the plug 18 strikes a wear plate 26 securedI to the adjacent faces of the upright stile ofthe door frame. 4*In the other end of the cylindrical member is formed a recess 27 which receives the outervend of a lighter coil spring 428, said spring also encircling the bolt, and bearing end against a transversely extending plate 29. This plate i`s formed with a pair of openings 30 through which extend the guidin pins 3l secured lto the inner end of the tuular casing 14. The inner end of the bolt is threaded through the said plate at 29.

' Normally, the plug 18 will project beyond the outer end of the tubular member, and the cylindrical member 23 disposed atthe outer end of the spiral groove 15. When the door is moved into closed position, by the force of the springs of the hinges, the plug will be forced into the' tubular member so as to compress the spring 25. VThis pressure on the spring will cause the. spring to exert pressure inwardly against lthe son of the enga ement of its'rib with the groove of the tuular member. The spring 25, being stronger than the spring 28, will easily overcome the spring 28 so as to force the member 23 inwardly. Now, if the door be suddenly closed the spring 25 will be compressed before the block 23 has time tol rotate and release the tension on said spring 25, said spring thus efi'ectually checking the door against any sudden closing. as the 'door moves farther from the first checking position into closed' position the block 23 will rotate and the slow movement following the checking will be taken up Vby the outer end oit the` tube l However,

memb'er 23 thus causing said member to rotate byreathe spring 28. Again, if the kdoor is closed slowly the spring 25 will be compressed very little or not at all, the 'block 23 moving in a substantially synchronous manner with the plug 18 so that thechecking is accomplished entirely by the light spring 28. When the door is pulled into open position, the spring 25 will exert outward pressure against the plug 18 so as to cause the same to project beyond the end of the tubular member. The pressure of the spring 25 against the member 23 being thus relieved, the spring 28 can eXpand and Jforce the member 23 to the outermost limit of its movement. The parts are then in position to again act when the dooris permitted to close under the influence of the spring hin es.

What is claime is:

.1. A door check comprising a cylinder disposed within the hinged edge of a door, a buii'er head projecting from the outer end of the cylinder, the intermediate portion of the interior wall of the cylinder being grooved, a spirally ribbed member disposed within the cylinder groove, a pin disposed centrally through the ribbed member, a head formed on one en of the pin and slidable within the buffer head, a spring disposed between the ribbed member and the buer head, and a weaker spring disposed between the ribbed member and the other end of the cylinder.

2. A door check comprising a cylinder, a buer head projecting from the outer end of the cylinder, the intermediate portion of the interior walls of the cylinder being grooved, a spirally ribbed member disposed within the cylinder and engaging in the grooves, a spring disposed between the ribbed member andthe buer head, and a weaker spring disposed between the ribbed member and the other end of the cylinder.

In testimony whereof l aliix my signature., in the presence of two witnesses.

- EBEN H. MAGKXNLAY.

Witnesses:

E. M. JACOBS, WILLIAM A. MAcnoNALn.

and engaging in the