US1915795A - Doorstop - Google Patents

Description

June 27, 1933. s. B. MacMlLLAN 1,915,795

DOORSTOP Filed Feb. 20, 1931 I INVENTORI. Jmzzze/fiZWWaw,

W W ORM;

Patented June 27, 1933 UN I 1 SAMUEL nmm-m eninnnnpor NEW YORK, iv. Y.

'noonsror Application filed February 20,1931. Serial No. 517,191."

The present invention relates to door attached stops or checks, and has for its object an improvement in that type of stop'or check that acts as a door jam between the bottom of door and the adjacent floor.

' One of the objects of the present device is to provide a pivoted'stop with an arcuate floor engaging member the face of which,

while arcuate, is eccentric to the pivotalidoor -19 mounting bracket so that a fast acting wedge action is initiated whenthe floor stop bracket is thrown into door stopping. action.

Another feature is to provide the stop I with a constant acting locking spring whereby to automatically lock the door stopain raised non-operating position, but to be active in frictioning the stop against loose motion when'in action as a door stopandithereby to prevent, by the drag so provided, the

door from closing by a draft of air'acting in a direction opposite to therdoor stopping action. p

These and other capabilities will be noted as the herein description proceeds and it is I obvious that modifications maybe made i the herein noted construction, without vdeparting from the spirit hereof, or the scope of the appended claims.

In the drawing, 1 I

3 Fig. 1 is a view showing a fragment ofthe lower portion of a door, showing my device partly broken awayto better illustrate the interior details of construction;

Fig. 2 is a similar view showing a front view similarly broken away for the same purpose; v i

1s a SGCtlOIIiLl view taken on llne Fig. 3 33, Fig. 1 looking in the dlIBCtlOILQf the arrows;

Fig. 4 1s a sectional View of the'arcuate stop head taken on the line 44,Fig. 1, looking in the direction of the arrows; and

Fig. 5 is a perspective front view of the pivot plate withthe'pivoted stop member removed. I

The device is a two piece stop, preferably of cast finished'brass, done in smooth hardware finish, and comprises .a door attaching pivot plate 1, Fig.5, having countersunk holes 2 therein for attaching to a door 4 movement.

'bymealis 0f d screws 8.3shown dotted in Fig. 1, and a pivoted stop arm 5 having an arcuate head 6 upon which is mounted a rubber stophead 7 The stop arm 5 is yokedandiboredas at v 8 ig. 1 to receive thereon the pivot pin 9, wh ch pin is fixedly heldin the yoke 10 and riveted therein and freely revolves in the bore-11 of the lug 12 on door plate 1 the bored lug being fully shown in Fig. 5. N The stop arm 5 as is shown in the broken I away portion in Fig. l, is bored longitudinally frominside the yoke portion 10 to form a bottomed seat or bore 13 for a compressed coll spr ng 14: to be mounted therein and a steel ball 15 is set in against the spring 14, sothat in any position the ball pressed against the round nose of the pivot lug 12 on door plate 1', in any position, thus creatinga constant tension between the pivoted stop arm 5 and itslug mounting 12 on plate 1.: As thus constructed a constant drag is exerted on the stop arm and head in position as a stop on the floor, or in non-stopping locatlon.

When the stop member is moved to the operative position as shown in Fig. 1 in dotted lines, the spring pressed ball tends to keep the head 6 in operative set position s againstthe floor 16 and thus prevents the door from moving oppositely tothe stopping pos1t1on, unless done so by actual'manual When the stop member is movedto inop-v erative position asflshown by full lines in Fig. .1,- the spring pressed ball drops into a detent depression 17 at the top oflug 12 of the door plate 1 and causes the stop member to be firmly retained against moven1ent,"eX- cept'when actuallyv moved downwardly for action. f f The facing or pedal surface 20 of the arcuate'stop head 6 is of some resilient material such as rubber, and' is moulded so that a broad knurled-like frictionsurface is pre-' sented to the floor. This is affixed to the head by means of a hollow seat 21 located in said head, into which fits amould'ed hollow-,

seat fitting lug 22 on the rear-of thecurved E facing 20, which lug is fitted into said hollow seat and a pin 23 is driven through trans- 'versely located bores 2424;, in the walls of said head 6, as in Fig. 4, and passes through the lug 22, and thereby locks the friction face in position.

The stop head 6, as previously noted, is of curved form, as viewed from the side, as in Fig. 1. The radius of the face of 6 is not truly radial from the center of pivot 9, however, but is developed from a point offset from said center. For the present purpose, by referring to the dotted outline shown in Fig. 1, the center of the radius forming the curved face of the head 6 could be offset, from the pivot center of 9, and be at a point X Fig. 1, and the radius indicated by R.

Thus, in action the curved head 6 when rocked on the center of pivot 9, describes an arc of movement indicated by the radius r, Fig. '1, the difl'erence of the two being indicated by the dimension (Z. Thus, as the door is moved in the direction of arrow B, Fig. 1, the eccentricity of the curved stop or head 6 causes the door to be lifted upwardly from the floor, and thus jam the stop against the floor, firmly.

The spring 14 presses the ball at times against said face 12 and into said depression 17 for holding the stop arm 5 upright flat against said plate 1.

Said arcuate stop head 6 has its inner end flush with the plate-engaging face of the arm and the outer end overhangs a considerable distance from the vertical axis of the arm when upright. The wide recess forming a seat 21 has side and end walls and a wide flat bottom; and the tread portion lies over saidwalls;

Said overhanging part of the stop head engages with the floor beneath the door stop to stop the door, thus leaving the inner end part of the head sufficiently remote from the floor (after all possible wear of the tread permitted by the side walls of the recess) to receive thereunder the whole-of a toe of a shoe for engaging a horizontal face of a corrugation for lifting the arm to vertical position.

Said-overhanging part, when the arm is vertical, projects far out from a 'vertlcal plane passing through the aXis of the pivot pin, thereby to cause the arm to move easily downward against the restraining action of said ball 15, when said overhanging end is pressed upon vertically downwardly.

Having thus described my ln'vention what I claim is:

1. In combination, a stop arm adapted to be pivoted to the lower margin of a door for movement in a plane transverse to the door and-floor; said arm being disposable in substantially upright position and provided at its free end with an offset arcuate head disposed substantially in said plane with its inner end substantially flush with thev back of said arm and its outer end overhanging a considerable distance from the vertical radial axis of the arm when upright; means for yieldably holding said arm in upright position; the outer peripheral holding the stop arm in uprightposition;

said arm being provided at its free end with an arcuate head having its outer end; overhanging a considerable distance from the vertical axis of the arm when upright,the peripheral face of said head having a tread portion thereon, having transverse corrugations; said overhanging part, when thearm is vertical, projecting far out froma vertical plane passing through the pivotal aXis of the arm, thereby to cause the arm to move down against the restraining action of said yieldablemeans when said corrugations of said overhanging end arepressed upon vertically downwardly. I

3. In combination, a pivot member adapted to be secured to the lower margin of adoor; a stop arm pivoted to said member for'movement'in a plane substantially perpendicular to the door and floor; yieldable means for yieldablyholding 13118311111111 upright position; said arm being provided at its free end with an arcuate head'disposed in said plane; the outer peripheral face of said head being formed with a wide recessforming aseat having side walls ayieldable tread block fitting in said seat and on said walls and having transverse corrugations; the-periphv curved to leave the outer end part of the head sufiic iently remote from the floor, afterv all possible wear of the tread permitted by the side walls, to receive thereunder the toefof ashoe for lifting vertically against the horizontal. faces of the corrugations, forlifting the arm to vertical position. 1

4.'In combination, a vertically-elongated pivot plate adapted tobe attached to the lower part of a door, and havingv a pivot lug at the lower end of its outer face; said lug having a partly cylindrical outer and lower face, a depression in its top face and a transverse bore; a stop arm having a yoked inner end embracing said lug and a pivot pin transverse to said end and engaged in said bore; said arm having a longitudinal bore having a closed interior end, and an open end adj acent to said lug; a ball and a spring in the bore, the spring pressing the ball at times against said face, and into, said depression for holding the stop arm upright flat against said plate; said arm being provided at its outer end with an arcuate head having its end more remote from said pin than its inner end, whereby to increase the stopping effect. Signed at Brooklyn in the county of Kings and State of New York'this 7th day of February A. D. 1931. i i

SAMUEL BLAIR MAoMILLAN.

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