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Publication numberUS781551 A
Publication typeGrant
Publication dateJan 31, 1905
Filing dateJan 30, 1904
Priority dateJan 30, 1904
Publication numberUS 781551 A, US 781551A, US-A-781551, US781551 A, US781551A
InventorsMark A Quillin
Original AssigneeMark A Quillin
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Door-check.
US 781551 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)

. No 781,551. I, PATE'NTED JAN. 31; 1905. M. A. QU.ILLIN. V

noon CHECK.

APPLICATION TILED JAN 30 1904.

Patented January 31, 1905.

PATENT OFFICE.

MARK A. QUILLIN, OFJASPER, MISSOURI.

DOOR-CHECK.

SPECIFICATION forming part of Letters Patent No. 781,551, dated January 31, 1905.

l Application filed January 30, 1904:. Serial No. 191,353.

T0 (1% whom, it may concern:

Be it known that I, 'MARK A. QUILLIN, a citi zen of the United States, residing at Jasper, in the county of Jasper and State of Missouri, have invented a new and useful Door-Check, of which the following is a specification.

This invention relates to devices for application to swinging doors for checking the movement at any desired point, and, has for its object to produce a simply-constructed device of this character operative by the rotation of the knob-spindle on the door.

With these-and other objects in View, which will appear as the natureof the invention is better understood, the same consists in certain novel features of construction, ashereinafter fully described and claimed.

In the accompanying drawings, forming a part of this specification, and in which corresponding parts are denoted by like designating characters, is illustrated the preferred form of the embodiment of the invention-capable of carrying the same into practical operation, it being understood that the invention is not necessarily limited thereto, as various changes in the shape, proportions, and general assemblage of the parts may be resorted to without departing from the principle or sacrificingv any of its advantages, and the right is therefore reserved of making all the changes and modifications which fairly fall within the scope of the invention and the claims made therefor.

In the drawings thus employed, Figure 1 is an edge view of a portion of a door and the ad acent floor with the improvement applied,-

and Fig. 2 is a frontelevation of the same.

In the improved device herein disclosed is a bracket for attachment to the door 11 near the floor 12 and preferably upon the inner face when used upon outside doors and upon either face preferred when employed upon inside doors. The free end of the bracket is formed with spaced ears,betwecn which two cam members 13 14 are pivoted eccentrically upon one 5 adjustable by a set-screw 20. The upper end common pivot-pin 15', the cams being reversely disposed. Attached pivotally to the cams are rods 16 17, extending upwardly and 'movably eonnected'to asleeve 18, the latter having another rod 19 slidable therein and door, so as to partake of the oscillatory mo' tion of the same. The sleeve 18 will be so adjusted upon the rod 19 that when the latchbolt is in its projected'position the cams 123 145 will be in their'depressed positions, and then when the knob-spindle is rotated to withdraw the latch-bolt it is obvious the corresponding movement of the crank-arm 21 will elevate the cams and release them from contact with the floor. It will also be obvious that when the crank-arm is turned into its downward position a strong toggle-lever action will result, which will simultaneously depress the cams, which-being reversely disposed willeffectually prevent any movement of the door in either direction while they are in their elepressed position. The cams will preferably be provided with shoes of rubber or similar material to increase their grip upon the floor and also to prevent abrasion of carpets or floors. 7

It will thus be seen thata very simply-constructed and effective device is produced operative entirely by the rotation of the knobspindles and by which means the door will be instantly checked in its movement in both directions when the knobs are released. i

All the parts except the friction-shoes will be of metal and maybe plated or otherwise ornamented to present a pleasing appearance.

The device may be adapted to any size or form of swinging door. Having thus described-the invention, what I claim is 1. The combination with a doorhaving a knob-controlled latch, of a pair of reverselydisposed cams pivoted near the lower edge of the door" for frictional engagement with, the

floor, and means controlled by the door-knob for simultaneously elevating the cams out of engagement with the floor when the knob is rotated to release the latch and also to force the cams downwardly into engagement with the floor upon the return movement of the knob.

2. The combination with a door having a knob-controlled latch, of a pair of reverselydisposed cams pivoted to the door near the lower edge thereof for engagement with the floor, a crank-arm carried by the door-knob spindle, and a rod connected to the crank-arm and also to the cams, whereby the latter may be simultaneously elevated and also depressed by rotative movements of the door-knob.

3. A door-check comprising a bracket for engagement with the door, a pair of reverselydisposed floor-engaging cams pivotally supported upon the bracket, a cranlearm provided with means for connection with the doorknob spindle, and a rod connected to the crankarm and also to the floor-engaging cams.

4. A door-check comprising a bracket for connection with the door, a pair of reverselydisposed cams pivoted upon the bracket, a crank-arm provided with means for connection with the door-knob spindle, a connecting-rod pivotally connected to the crank-arm, and links pivotally connected to the respective cams and also pivotally connected to the rod.

5. A door-check comprising a bracket for connection with the door, a pair of reverselydisposed floor-engaging cams pivotally carried by the bracket, a crank-arm provided with means for connection with the door-knob spindle, a connecting-rod pivotally connected to the crank-arm, a sleeve slidably :uljustable upon the rod, a set-screw carried by the sleeve to rigidly connect the latter to the rod, and links pivotally connected to the cams and also to the slidable sleeve.

6. In a door-check, a bracket for attachment to a door, two reversely-disposcd cams movably connected to said bracket, an arm connected to the knob-spindle of the door and rotative therewith, a rod connected to said arm and having a sleeve adjustable longitudinally thereon, and rods between said sleeve and cams, whereby the rotation of said knob-spin- I MARK A. QUILLI N.

\Vitnesses:

J. M. Boo'rs, M. \V. BUSBY.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4368905 *Jul 21, 1980Jan 18, 1983Adams Rite Manufacturing Co.Exit door locking mechanism having multiple bolts
Classifications
Cooperative ClassificationE05B83/247