US1704730A - Door latch - Google Patents

Description

March 12, 1929. v N, 01cm 5 104,730

DOOR LATCH Filed March 23, 1927 INVENTOR.

ATTORNEY.

Patented Mar. 12, 1929,

4 iree730y Application filed March .23, 1927. Serial no. 177,651.

The invention relates to door latches, and

has for its object to'provide in combination with a hinged door latching device an arcuate member concentric with the hinging point of the door and having notcheswith which a slidable bar controlled by the'latch operating mechanism cooperates for holding the door in open positions. 7

A further object is to provide a bell crank lever connection mounted on the door, to one arm of which'the latching .bar is pivotally connected and a link connection between said" bell crank lever-and the pivoted latch, whereby upon raising said latch to open position, the slidable bar will be moved out of engagement with the notches of the arcuate member for allowing the door to be opened.

' it further object is to provide spring means for normally forcing the latching bar upwardly towards the arcuate member.

l v i h the above and other objects in view the invention resides in the combination and arrangement of parts as hereinafter set forth, shown in the drawing, described and claimed, it being understood that changes in the precise embodiment of the invention may be'made within the scope of what is claimed without departing from the spirit of the invention.

In the drawing Figure 1 is a view in elevation of thedoor showing the same in closed position.

Figure 2 is a detail sectional view taken on line 2-2 of Figure 1.

Figure 3 is a bottom plan view of the arcuate member.

Figure 4: is a detail sectional view taken on line 44t of Figure 1.

Referring to the drawing the numeral 1 designates the door which is hingedly mounted at 2 within a door frame 3. Secured to opposite sides of the door 1 adjacent its free end by means of rivets & are plates 5 in a sleeve 6 of one of which plates is rotatably mounted a shaft 7, which shaft has its ends providedwith handle members 8 on opposite sides of the door whereby the mechanism hereinafter set forth, may be controlled from either side of the door. Shaft 7 is provided with a latching arm 9, which latching arm pivotally moved in a vertical plane and is adapted to engage over the keeper 10 for holding the door 1 in closed position. Pivotally connected at 11 to the outer side of the door is a bell crank lever 12, to the arm 13 of which is pivotally j in turn pivotally connected at 16 to the latchv connected at 1 1 a link 15, and which link is ing arm 9, therefore it will be seen that when the operator rotates the shaft 7 for raising v the latching arm,9,'the link 15 will rock the bell crank lever-12 on its pivotal point thereby movmg the arm 17 of the bell crank lever downwardly and imparting a pull-downwardly on the vertically slidable bar 18, which bar is pivotally connected at 19 to the.

arm 17. The bar 18 is slidably mounted in bearing members'20 carried by the face of the door and terminates above the upperend Qfthe door, where its endwill'be received in any of the notches 21 in the'under side ofthe arcuate door holder 22, whichdoor holder is concentric with the hinging points 2 of the door, consequently the door may be held in various opened positions, and the use of conventional formsof door stopsis obviated. The arcuate member 22 is provided with an upwardly and inwardly extending brace'23,

whichisconnected at 24 to the frame. of the door and the ends 'of'the arcuate member are connected at 25 to the frame, therefore it will be seen that the arcuate member is thoroughly braced at all times.

Disposed withina chamber 26.of th e door 1 and connected at 27 to a post carried by the slidable bar 18 is a coiled spring 19, which cooperates with the slidable bar and a fixed support for normally forcing the slidable bar 18 upwardlyland against thecontractible force of which the operator moves the mocha-- nism hereinbefore set forth during an unlatching operation.-

' From the above it will be seen that a com bined door latching and door holding mecha-' nism is provided which will positivelyhold the door in closed position at all times, and

will also hold the door in various'opened positions, thereby preventing slamming ofthe door and obviating the use of conventional forms of door stops as at present in use.

The invention having been set forth what 1s claimed'as new-and useful 1s The combination with a hinged door, a piv I oted latch carried by said door, a handle member carried by said latch, an arcuate notched member above the door concentric with the hinging point thereof, a vertically slidable bar carried by the door and cooperating with a 1 the notches of the arcuate member for holding is pivotallymoved upwardly said bar will be the door in various opened positions, a bell moved downwardly to unlatched position and i0 crank lever, said slidable bar being pivotally spring means for normally forcing said slidconnected to one of the arms of the bell crank able bar upwardly. i

5 leverand a link connection between the other In testimony whereof I hereunto 'aflix my arm of the bell crank lever and the pivoted signature.

latch and curving over the handle member a v f and forming means whereby when said latch NELLIE DICKEY.

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