US2016519A

US2016519A - Doorlatch

Info

Publication number: US2016519A
Application number: US692688A
Authority: US
Inventors: Oscar C Schmidt
Original assignee: Cincinnati Butchers Supply Co
Current assignee: Cincinnati Butchers Supply Co
Priority date: 1933-10-07
Filing date: 1933-10-07
Publication date: 1935-10-08
Anticipated expiration: 1952-10-08

Description

, 1935 0. cfscHMm'r 2,016,519

DOORLATC H Filed Oct. 7, 1933 4 Sheets-Sheet l v 13 2. I m/vs/vroe:

Oct. 8, 1935. sc m 2,016,519

DOORLATCH Filed Oct. 7, 1953 4 Sheets-Sheet 2 a v //07 I /76 IE- O /06 I38 /78A Oct: 8,' 1935. o. c. SCHMIDT DOORLATCH Filed Oct. 7, "1935 4 Sheets-Sheet 5 INVENTOP.

o. c. SCHMIDT 2,616,519

DOORLATCH Filed Oct; 7, 1935 4 Sheets-Sheet 4 //v l/ENTGP:

Patented Oct. '8, 1935 UNITED STATES PATENT OFFICE] DOORLATCH Oscar C. Schmidt, Cincinnati, Ohio, assignor to The Cincinnati Butchers Supply Company,- Cincinnati, Ohio, a-corporation 01. Ohio Application October 7, 1933, Serial No. 692,688 rciaim. (01. 292-78) large refrigerator doors used in butchershops, latch lever in closed relation in full lines, and in packing plants and the like. open relation in dotted lines. o

It is the object of my invention to provide a Fig. 11 is a front elevation of a further modisimple door latch which is operated by the movefication of my invention, partly broken away, and I ment of the door in opening and in closing the showing the latch mountedJon the door.

door; further, to provide novel latching means Fig. 12 is a plan view of the same, with the My invention relates to door latches, especially to latches for doors whichit is desired to open and close frequently. My invention is also designed for use with heavy doors, for instance,

whereby the latching lever is tripped by the closing movement of the door for exerting closing force upon the door; further, for providing open ing force upon the door when opening the door;

Fig. 10 is a longitudinal section of the same v taken on the line Iii-I0 of Fig. 8, showing the door and wall in section on the line l2--l2 of Fig. 11, and partly broken away.

Fig. 13 is a side elevation 01" a still further modification of my improved device, showing the further, to provide novel latching means wherelatching means located at the inside of the door. by the latching lever may be placed on the wall Fig. 14 is a planzview of the same, with the 0f the door opening or on the door; further, to d or and wall in section on the line |l-ll of provide novelmeans for operating the latching Fig. 13, and partly broken y;

lever; and, further, to provide novel means in Fig. 15 is a longitudinal section' of the same, connection therewith for initially I urging the taken on the line l5l5 of Fig. 13, and showing 20 door in opening direction. the latch in latched relation in full lines, and in My invention'consists in novel means for acunlatched relation in dotted lines. complishing the objects stated, and in the novel The body I of the refrigerator has a door openparts and the novel arrangements and combinai g a d o be Closed y a (1001 3 mounted tions of parts hereinafter more fully described on hinges A Sealing C n 5 is located 25 and claimed. tween a flange 6. which surrounds the door and The invention will be further readily underthe outer margin of the door opening, and'a sealstood from the following description and claims, ing cushion l is located between the inner margin and from the drawings, in which latter: of the door and a sealing strip 8 secured to the Fig. 1 is a front elevation of my improved dedoor jamb 9 at the inner end of the door opening. vice, with the door and'wall of a refrigerator The sealing cushio and Sealing S ip e tend partly broken away. around the door opening.

Fig. 2 is a plan view of the same, the door and A latch lever II is pivoted on a pivot pin l2, wall being shown in section on the line 2-2 of mounted in bearings l3 in side flanges I extend- Fig. 1 and partly broken away. ing from abase l5 which forms a casing It, the

Fig. 3 is an enlarged vertical section of the side flanges having a slot ll therebetween in latch, taken on the line 3-3 of Fig. 1, and showwhich the latch'lever moves. The casing has a ing the parts in latched relation in full lines, and av y Shown formed y he Side flanges I4,

' in unlatched relation in dotted lines. a cross wall I9 and an end wall 20, forming an Fig, 4 is a cross-section of the same, taken in n l s n w ll f th as n T as is p v the plane of the irregular line 4 4 i 3', with fasteningflanges 2|, suitable screws 22 se- Fig. 5 is a cross-sectional detail view taken on curing the casinginplacethe line of 1, The latch lever is provided with opposed contact a 6 is a a 22212::thanmeanest:3.-

322 2 2:5 3 :3 device for use with an extm other at the respective sides of the pivot 01' the Fi 7 ho iz 1 t1 fth latch lever and coact with a keeper 3|. 7 L 1S r n cross sec on o 8 Same The keeper is shown as a pin located in a beara e??? a}? 3 -7 g; lpi i y yfing 32 ofja plate-"33 secured in place by screws WW 34. Asetscrewti' threaded inthe-bearingsclamps tr. view of the sa e, with the Fig-1a is "a f'ront ivation ham a: farmer.

Zpinmaybe' provided-wit The e ter-le ixt he .l 'e 2 35=Fl h enacts it'lijtheeontact faces A handle. from he .plate'33 forrnovemento 'th door.

The casing in Figs. I to wtncmsiv shown end of the rod is received in a. recess 47 in the end wall 20 of the casing. The inner end of the rod has an enlarged threaded portion 48, over which a nut 49 is threaded.

A helical spring is located about the rod between said nut and the wall 52 of the recess 41. The spring is centered about the rod by ,the

enlarged threaded portion at one end thereof, and an enlargement 53 of said rod at the other end thereof. The outer end of the rod is maintained in said recess for locating said outer end laterally, the outer end of the rod being, however, normally distanced from the bottom of the recess for permitting endwise movement of said rod. Swivel or pivot connection 5c between the outer end of the rod and the end wall of the casing is 7 thus formed.

When the axis of the pivot 43 is located coincident with a right line between the axis of the pivot 52 and the pivotal axis at the outer end of the rod, which right line is represented by the clot and dash line 54, then the latch lever is in dead center position. If the axis of the pivot 43 is moved to either side of said right line, then the spring and rod connection with the tail of the latch lever urge swinging movement of the latch lever to extreme extent, for coaction of either contact face 26, 21 with the keeper, depending on which side of said right line the axis of the pivot 43 is located, for either urging closing movement of the door when the keeper and the contact face 26 are in coaction, or opening movement of the door when the keeper and the contact face 21 are in coaction.

Movement of the latch lever in each direction is limited to place the contact faces in proper positions. the lever is arranged to strike the base at the lug 55 when the latch lever moves in one direction, and the inner corner 56 of the tail of the lever is arranged to strike the base when thelatch lever is moved in the opposite direction. The latch lever is provided with a projection 57 having a rounded edge to continuously close the outer end of the slot Il during various positions of the latch lever.

When the door is in closed relation, the inner wing is distanced from the base by a space 56, so that. there is continuous urge of the contact face 26 against the keeper for urging the door into closed relation with continuous pressure so as to thoroughly seal the door. I,

The pin 3| is preferably polygonal in cross-section, and the bearing 32 therefor is of similar cross-sectional form, and the roller 36 is preferably eccentrically placed with relation to the axis of the pin, as on an eccentric shank 6| of the pin. This permits the pin to be placed in various positions rotatively in the bearings for adjusting the position of the contact roller, and therefore adjusts the closed relation of the door. Placing the eccentric roller at different positions about the axis of the pin places the contact roller at different distances from the planes in which the sealing faces of. the door are located, and in difierent positions with relation to the contact faces Thus the inner one of the wings of on the latch lever, for obtaining different closing efiects upon the door.

It will be noted from the full-line position of the latch lever in Fig. 3, that when the door is in closed relation, the contact face 26 extends up- 5 wardly and slantingly outward, with the tail of the latch lever and the rod and spring thereabout tipped outwardly from the right line between the pivot l2 and the pivot 50 at the bottom of the rod 42, the spring exerting inward pressure upon the door, with the inner wing of the latch lever spaced from the base by the space 58. In this relation the contact face 21 and the wing 29 on which it is located, extend substantially horizontally inward and below the path or plane in which the keeper 31 moves when the door is swung.

If now the door be swung to open the door, by pulling upon the handle 38, or pushing upon the door from the inside of the refrigerator, the keeper 3| will move outwardly in a horizontal plane acting in said horizontal plane against the contact face 26, for swinging the latch lever on its pivot in the opposite direction, causing shifting of the pivot 43 and moving it past the right line 54, whereupon the spring and rod connection with the tail of said lever causes swinging of the latch lever for moving the contact face 21 into contact with the keeper, represented by the dotted position of the latch lever in Fig. 3, in which relation outward urge of the contact face 21 is caused upon the keeper for urging the keeper and the door outwardly and aiding in the opening movement of the door.

This movement continues until the stop 58 on the keeper strikes the rear wall of the casing, or the front edge 62 of the latch lever strikes the front end wall 63 of the slot 81, or both these striking movements take place, in which position the contact face 26 and the wing 28 of the latch lever will have moved out of range of the path of the keeper to a position below the level or path of movement of the keeper, so that the door and keeper may be swung outwardly, and placing the lever in such position that when the door is swung into closing relation, the keeper will strike the contact face 21 of the latch lever.

The impact of the keeper upon said latch lever or the moving of the door into closing relation causes tilting of the latch lever so as to again reversely move its pivot 33 to the other side of the right line 54, whereupon the spring and rod connection with the latch lever will cause swinging of the latch lever for closing relation of the door and movement of the contact face 26 against the keeper 3|, with the spring urging closing movement of the door.

The door may be opened or closed by merely pulling or pushing on the door from either the inside or from the outside of the door, manipulation of other latching means being unnecessary.

The latch lever is provided with a hole 59 in which the bow of a padlock may be placed for locking the latch lever in closed position, the bow being obstructed by the proximate walls of the casing for preventing pivotal movement of the latch lever. I

. The inside face 01' the door may be provided with a handle 64 on a plate 65 secured to the door.

It will be noted that the contact faces 26, 21 have a shallow hollow 66 therebetween. The 70 middle portionof this hollow is in the plane of the right line 54 when the latch lever is in dead center position. The opposed wings and the contact faces 26, 21 thereon extend in opposite directions with relation to. each other at the oppo- 7 site sides. of this hollow, so that little movement of either wing or contact face ineither direction about the axis of the latch lever is required for permitting traversing movement between the keeper and either of said contact faces with little vertical distance between them while the latch leveris in either of its extreme positions, with the other of said contact faces and wings urged against the keeper by the spring for urging either opening movement or closing movement of the door.

The contact faces 26, 21 extend at substantially obtuse angles with relation to each other at the respective sides of the hollow at the contact end of said latch lever, and when said latch lever is in dead center position the dead center line 58 practically forms a bisector of said obtuse angle,

with the biseetor substantially coincident with a right line in which the pivots I2, 48 and 88 are located when the latch lever is in. dead center position.

Figs. 6 and 'l exemplify a modification of my" invention for use especially with large doors or warped doors for insuring closure throughout the margin of the door." In these figures similar. parts are designated by similar reference numer als raised to the series I88. The handles on the keeper supports may be dispensed with in this exemplification, and a keeper I may be mounted in a bearing I32 of akeeper plate I88 secured at each of the swinging corners of the door. A

"latch structure is mounted-on the door frame or jamb at each of corresponding corners of the door.

A handle I88 is mounted on the middle portion of the door, and is shown as part of a lever I88 mounted on a pivot I88 of an escutcheon plate I18 in the handle lever and a pin, I88 on the rod received in the slot.

An operator at the outside of the door may open the door by manipulation of the handle I88, and an operator at the inside of the door may open the door by operation of the handle I18. The door may be closed or opened by pulling or pushing respectively upon either handle from the outside or inside of the door.

The latches at the respective corners of the door operate simultaneously automatically by the pushing and pulling movements upon the door in manner similar to the operation of the single latch described in connection with Figs. 1 to 5 inclusive. Separate adJustment of the keepers aid in compensating for different pressures or extents of movements upon the respective corners of the said threaded enlargement, a helical spring about said rod' between said nut and a stationary part 65 door in case the door should be warped or its closing be uneven at different parts of the door. Latches and keepers may be placed on' different parts of the door according to the requirements a for closing the door throughout its margin.

Referring to Figs. 8, 9 and 10, similar parts are designatedby similar reference numerals raised to the series 200. In this modification the latch lever is provided with a handle 888 which extends from the latch lever through the slot Ill and alongside oi the front of the casing 2 I8 but spaced therefrom by a space 288, permitting room by which the handle may be grasped by the hand of the operator for swinging the latch lever by outward swinging of the handle for more intimate sealing of the door, or for initially opening 6 the door by swinging the handle inwardly.

This modification is especially useful where extra heavy doors are employed or where doorsfit tightly or with a tendency to bind in the door tive to insure intimate closing of the door and ready initial opening movement of the door.

I have in Figs. 11 and 12 shown an additional modification in which the latch lever is mounted on the door and the keeper on the jamb. In these, 15

figures similar parts are designated by similar reference numerals raised to the series 300. The latch lever and its mounting are similar to that shown in Figs. 8, 9 and 10. The latch. casing is mounted horizontally on the door, and the keeper is mounted vertically on the jamb, the axis of the keeper being substantially parallel to the pivotal axes of the hinges' of the door. 7

The pin 88I is mounted in a bearing 882 on a bracket 889 extending from the plate 888, secured 25 to the jamb by screws 884. I

I have in Figs. 13, 14 and 15 exemplified the keeper and latch lever at the inside of the door, the keeper being mounted on the door jamb and the latch lever and its casing on the door. Similar parts in these figures are designated by similar numerals raised to the series 400. In this. instance, the keeper 88I is rotatably adjustable in a bearing 882 on a plate 488 secured to the sealing strip 888 and to the jamb in a recesslsfl.

An outer handle 481 is provided on an escutch'eon plate 488, secured to the outer face of the door, to be grasped by the operator at the outside of the door for opening or for closing the door.

The latch operates automatically in response to theopening or closing movement for latchingor unlatching the door.

The inner face of the door may be provided with a handle in each of the exempliflcations-shown and described for pulling the door into closing 45 position. V

Having thus fully described my invention, what I claim as-new and desire to secure by Letters Patent is:

In a latch, the combination of a casing, a lever having a pivot in said casing and having a latching end at one side of said pivot, a rod whose one end hasarticulating connection with said lever at I the opposite side of said pivot and whose other end has articulating connection with said casing,

of said casing with the respective ends of said helical spring. about said enlargements for centering both ends of said spring about said rod and said parts being so related that adjustment of said nut on said threaded enlargement adjusts the tension of said spring, and said second-named enlargement movable axially in said spring upon pivotal movement of said lever.

- OSCAR SCHIIIDT.

Jamb, the handle on' the latch lever being effec- 1o