US2476734A

US2476734A - Latch construction

Info

Publication number: US2476734A
Application number: US2724A
Authority: US
Inventors: Jellison Robert
Original assignee: Individual
Current assignee: Individual
Priority date: 1948-01-16
Filing date: 1948-01-16
Publication date: 1949-07-19
Anticipated expiration: 1966-07-19

Description

y R. JELLISON 2,476,734

LATCH CONSTRUCTION Filed Jan. 16, 1948 v 5 Sheets-Sheet l E LIE-:l ELE E July 19, 1949.

Filed Jan. 16, 1948 R. JELLISON LATCH CONSTRUCTION 5 Sheets-Sheet 2 i J 27 7 I3 l4 [a I5 I? C N 4 ll BY Mamm A rro /vzrs July 19, 1949. R. JELLISON LATCH CONSTRUCTION 5 Sheets-Sheet 3 Filed Jan. 16, 1948 LEI-7 1E=lEl- V IN VEN TOR; Reef/Q7 Jazz AS 04 Ch) I A I'TJ/P/Vil July 19, 1949.

R. JELLISON 2,476,734

. LATCH CONSTRUCTION Filed Jan. 16, 1948 5 Sheets-Sheet 4 1 1T'= LE m fi 1 @E U 65. W J "1: 51.

, JNVENTOR. 14 05527 Jlqz /60/V BY ywww ' y 1949. R. JELLISON LATCH CONSTRUCTION Filed Jan. 16, 1948 5 Sheets-Sheet 5 Patented July 19, 1949 STAT ES FATE NT OFFICE LATCH: QQNSTRUGTION Robert Jellison, San Diego, Calif.

Aimlication January 16, 9.48, Serial No. 23%

14 Claims.

This. invention relates generally. to latch mechanisms and reiers more particularly to improve-. ments. in latch iconstruetions of the pivoted bolt typ The present invention is a continuation-inpart. of my copending application Serial No. 6.88 660 filed August. 6, 19.46, now abandoned, and entitled Quick release locking device.

One of the objects oi the present invention isto provide a, latch mechanism capable of beingreadily manipulated tov latched or operative positi'on wherein. the bolt. securelgr engages asuitable keeper element and adapted tolbe quickly released from the latched. position or keeper element with very little effort on the part of the operator.

Another object of the present invention to provide latch mechanismcomposed oi; a relatively few simple parts capable of being, inexpensively manufactured, assembled and installed;

The foregoing as. 'well as other objects will. be made more apparentas this description proceeds; especially when considered in. connection with the accompanying drawings, wherein:

Figure 1 is a side elevational view' with certain parts broken away of a latch mechanism embody- Figure 4 is a side elevational view. of the. latch mechanism shownin Figure 1;

Figure 5 is a sectional view taken on the( line 5-5. of Figure 4;.

Figure 6 is a sectional view taken on the line Figure '7 is a iront elevational. view halving certain parts, broken away of a modified form of latch mechanism;

Figure 8 isv a, view similar to- Fi-gure, 7 showing the latch mechanism in a.- difieren-t position;

Figure 9 is a sectional view taken.- on the line 9-9 f i ure 8.;

Figure 1.0 is a sectional view taken on the line |Ll0 of Figure 8;.

Figure 11 is afront elevational. view'of another embodiment of invention and. having. certain parts brokenaway for-the sake. of clean-less;

Figure 12 is a. view similar to Figure 11- showing the parts of the latch mechanism-in a (litter-em: position;

Figures 13 and 14 are respectively sectional views taken on the. lines t3 -l3 and. l.-L-lkoi: 1 e 1 1 Fi ure .15 is a fr nt elevational view or a fur,-

2 then emhodi-mentoi this invention and also having a part-oi the-.latclacasing broken away for the sake of. clearnessg.

Figure 16 is: a view similar to Figure 15 showing the latch mechanism in another position Figures 1'1 and 18, are. respectively sectional views takenon the. lines; -7-l'b andv lit-I85 oi Figure. 16.

Referring first tot the-embodiment of the invention shown in 1 tois inclusive, it will be noted that the reference numeral H) indicates a latch casing, composed of two plates it secured together in lateral spaced relationship by means. of fastener elements t2, Positioned between the plates It. are two bolts l3 and. L4 having corresponding ends. projecting beyond the adjacent side of the: casing. w in the manner clearly shown intheseveral figures of the drawings, The bolts are inthe term of plates and are supported on the. casing Izll between the. plate H in face. to-iace. relationship.

As. shown particularly Figure 6 of the draw;- ings, the two'bolts are-pivoted on the. casing Hl intermediate. the ends thereof tor relative: swingi-ng movement. in parallel planes about a common pivot L5. The bolts are held in lateral spaced relationship by meansoi. a. suitable spacer to supported on the pivotpip; I5 between. the bolts and the opposite ends'ot the'pivot pin l5 are-journal-led in bearings. H respectivela carried bythe plates H: of the casing.

Both the latch bolts are identical in shape and theouter or projecting ends thereof cooperate to securely engage a keeper element designoted in the several-,flsluresof the drawings by the numeral t8;v As, shown. in Figure 1-, of the drawings, the outer end ofeach bolt is formed with a recess 19 of sufficient dimensionto receive the keeper element. i8. recess I=9 in one bolt is opposed to the t9 the other bolt, and the two recesses are so related.- that in th latched position. of. the two bola-ts,- they cooperate to provide; a. continuous circular bearing. contact for the keeper t8 in2 the mannershown in Fi ure 5 of. the drawings; In other words, when the two bolts. are swung to their latched-positions, the wall 29 of. the recess in. the: bolt l4 closes the-open end of the recess I35 in the bolt l3, and the corresponding wall 2| of the recess l9. in the. bolt. t3 closes; the open and otthe recess. I18 in the bolt 14.. Thus: in. the latched hositious of the two bolts, the keeper. 'element;- is located within the two recesses; antiwar-mot disengage until the bolts are to their released: positions shown in Figures- 1 of the It is pointed. out at this time that in the released position of the two bolts, the wall portions 22 of the respective recesses cooperate to locate the keeper element in registration with the recesses for engagement in the latter when the bolts are swung to their latched positions shown in Figure 5 of the drawmgs.

The bolts are swung to their respective latched positions by an abutment 23 comprising a pin extending parallel to the pivot pin I5 and having its axis included in a common plane with the axis of the pivot pin I5. The abutment 23 pro jects through elongated aligned slots 23 formed in the casing plates II and is connected at the opposite ends to a suitable operator by links 26. Referring again to Figure 6 of the drawings, it will be noted that anti-friction rollers 21 are supported on the pin 23 and respectively engage.

the elongated walls of the slots 24 in the casing. Also supported on the pin 23 is a pair of antifriction rollers 28 suitably held in axial spaced relationship on the pin 23 for respective engagement with cam faces 29 formed on the laterally inner edges of the bolts adjacent the inner ends thereof.

The above arrangement is such that movement of the keeper 18 in a direction toward the bolts while in their released or open positions shown in Figure l engages the keeper with the surfaces 22 and swings the bolts to their latched positions shown in Figure 5. During this operation the inner ends of the bolts swing outwardly allowing the abutment 23 to assume a position between the cam surfaces 29 and hold the bolts in their respective latched positions. or course, inward movement of the abutment 23 enables the bolts to be swung to their respective released positions shown in Figure 1 of the drawings. In this connection it will be noted that each bolt is formed with an extension 30 at the inner end, and these extensions respectively engage opposite sides of the rollers 28 to position the bolts in their respective inoperative or released positions.

The bolts are respectively swung outwardly to their released positions by means of coil springs 3| respectively connected to the bolts adjacent the projecting or outer ends thereof. In detail the laterally outer edges 32 of the bolts are sumate in contour and respectively form bearing surfaces for supporting the coil springs 3|. The outer ends of the coil springs are anchored to the respective bolts adjacent the open ends of the recesses i9, and the inner ends of the coil springs are respectively connected to the abutment 23 by links 33. It follows from the above that the coil springs 3| are connected in the assembly in a manner to yieldably maintainthe cam surfaces 29 in contact with the respective rollers 28 on the abutment 23. Thus as the abutment 23 is retracted or moved in a direction away from the pivot pin I5, the springs 31 serve to swing the bolts to their released positions. It will also be noted that the coil springs 3| tend to urge the abutment 23 in a direction toward the pivot pin l5, so that in the latched position of the bolts a continuous clamping pressure is applied to the keeper by the bolts. This feature is advantageous in that it provides the latch with an automatic take-up.

Referring now to the embodiment of the invention shown in Figures 7 to 9 inclusive, it will be noted that the latch casing comprises plates 35 secured in lateral spaced relationship by suitable fastener elements 33, and'having registering recesses 31 at one edge to provide clearance for a keeper element 38.

4 keeper element 38. A latch bolt 31 is positioned between the plates 35 and is supported intermediate the ends on a pivot 39 for swinging movement in a plane parallel to the planes of the plates 35.

The bolt 31 is in the form of a plate havin a nose portion 49 at the outer end adapted to swing across the recesses 3'! and having an open ended recess M in the nose portion for receiving the keeper element 38 when the bolt is swung to its latched position shown in Figure 8 of the draw ings. It will be noted that the inner edge 42 of the recess 4! projects beyond the open end of the recess, and forms a cam face for contact with the As shown in Figure '7 of the drawings, the keeper element 38 is adapted to abut the cam face 42 in such relationship to the pivot 39 that when the keeper element and latch are relatively moved toward one another, the bolt is swung from the position shown in Figure 7 to the position shown in Figure 8, wherein the keeper element engages in the recess 41.

The bolt is held in its latched position by means of an abutment 43 in the form of a pin having its axis extending parallel to the axis of the pivot pin 39 and movable in directions toward and away from the pivot pin 39 through the registering elongated slots Mi formed in the plates 35. The location of the abutment 43 with respect to the pin 33 is such that in the latched position of the bolt, the abutment engages the side edge 35 of the boit to prevent swinging movement of the bolt from its latched position shown in Figure 8 of the drawings to its released position shown in Figure 7.

The slots 44 extend beyond the inner end of the bolt a sufficient distance to enable moving the abutment 33 to a position wherein the bolt is free to swing to its unlatched position shown in Fig ure 7 of the drawings. When in this latter position, the abutment 43 is engaged by a stop 47 projecting inwardly from the corresponding end of the bolt. The stop 4'! is held in contact with the abutment 43 by a coil spring 48 having a bearing engagement throughoutits length with the side edge 49 of the bolt opposite the edge 45. The outer end of the coil spring is anchored on the nose portion All of the bolt and the inner end of the coil spring is connected to the abutment by means of a pair of links 50. The links 50 straddle the inner end portion of the bolt, and the outer ends of the links are connected by a pin 5! which contacts the edge portion 49 of the bolt and forms an anchor for the spring 43. The inner ends of the links 50 are respectively connected to the opposite end portions of the abutment 53.

The relationship of the several parts of the latch mechanism in Figures 7 to 10 inclusive is such that when an inward thrust is applied to the cam face 42 on the bolt by the keeper element 38, the bolt is swung in a counterclockwise direction about the pin 39 to its latched position shown in Figure 8 of the drawings wherein the keeper element is received by'the recess 4| in the bolt. Also during the above swinging movement of the bolt, the edge portion 45 on the bolt registers with the abutment 43 permitting the latter to be moved outwardly by the spring 48 along the edge portion 45. Thus the bolt is positively held in its latched position by the abutment 43 until the latter is again moved inwardly to its released position. The arrangement is such that the spring 43 yieldably maintains the abutment 43 in its latched position, and also operates in the released position of the abutment to swing thebolt to the-posislidably engageable with the abutment in one po- 'sition of the latter to hold the bolt in a latched position and responsive to movement of the abutment to another position to permit swinging movement of the bolt to its released position, means yieldably urging the bolt to its released position including a coil spring having one end anchored on the end of the bolt adjacent the recess, and links straddling the bolt with adjacent ends pivoted to the abutment and with the opposite ends connected to the free end of the coil spring.

3. A latch mechanism comprising a support, a latch bolt pivoted intermediate the ends on the support for swingingmovement and having an open ended recess at one side of the axis of swinging movement for receiving a keeper element in response to swinging the bolt in one direction, an abutment extended across the plane of Swinging movement of the bolt at the opposite side of said axis and mounted on the support for limited sliding movement along a path extending perpendicular to said axis, a latching sur face on the bolt slidably engageable with the abutment in one position of the lattter to'hold the bolt in a latched position and responsive to movement of the abutment to another position to permit swinging movement of the bolt to its released position, a stop on the bolt engageable with the abutment to hold the bolt in its released position,

means yieldably urging the bolt to its released position including a coil spring having one end anchored on the end of the bolt adjacent the keeper receiving recess and having the opposite end connected to the abutment for resisting movement of the latter to its bolt releasing position, and a cam face between the stop and latching surface aforesaid on the bolt engageable with the abutment and responsive to swinging movement of the bolt to its latched position to guide the abutment into operative position with respect to said latching surface.

4. A latch mechanism comprising a support, a latch bolt pivoted intermediate the ends of the support for swinging movement and having an open ended recess at one side of the axis of swing ing movement for receiving a keeper element in response to swinging the bolt in one direction, an abutment extended across the plane of swinging movement of the bolt at the opposite side of the said axis and mounted on the support for limited sliding movement along a path extending perpendicular to said axis, a latching surface on the bolt slidably engageable with the abutment in one position of the latter to hold the bolt in a latched position and responsive to movement of the abutment to another position to permit swinging movement of the bolt to its released position, means yieldably urging the bolt to its released position including a coil spring having one end anchored on the end of the bolt adjacent the recess and having the opposite end connected to the abutment for yieldably urging the latter to the first named position aforesaid thereof, and means on the bolt engageable with the keeper and responsive to relative movement of the bolt and keeper in a direction toward one another to swing the bolt to its latched position against the action of the coil spring.

5. A latch mechanism comprising a support, a latch bolt pivoted intermediate the ends on the support for swinging movement and having an open ended recess at one side of the axis of swinging movementfor receiving a keeper element in response to swinging the bolt in one direction,

an abutment extended across the'piane of swinging movement of the bolt at the opposite side of said axis and mounted on the support for limited sliding movement along a path extending perpendicular to said axis, an edge surface on the bolt adjacent the open end of the keeper receiving recess slidably engageable with the abutment in one position of the latter to hold the bolt in a latched position and responsive to sliding movement of the abutment to another position to permit swinging the bolt to its released position, means yieldably urging the bolt to its released position including a coil spring bearing along the edge surface of the bolt opposite the abutment engaging edge surface aforesaid and having one end anchored to the bolt at the recess side of the axis of swinging movement of the bolt, and means connecting the opposite end of the spring to said abutment.

6. A latch mechanism comprising a support, a latch bolt pivoted intermediate the ends on the support for swinging movement and having an open ended recess at one side of the axis of swinging movement for receiving a keeper element in response to swinging the bolt in one direction, an abutment extended across the plane of swinging movement of the bolt at the opposite side of said axis and mounted on the support for limited sliding movement along a path extending perpendicular to said axis, an edge surface on the bolt adjacent the open end of the keeper receiving recess slidably engageable with the abutment in one position of the latter to hold the bolt in a latched position and responsive to sliding movement of the abutment to another position to permit swinging the bolt to its released position, means yieldably urging the bolt to its released position including a coil spring bearing along the edge surface of the bolt opposite the abutment engaging edge surface aforesaid and having one end anchored to the bolt at the recess side of the axis of swinging movement of the bolt, means connecting the opposite end of the coil spring to the abutment for urging the latter to its latching position, and means on the bolt engageable with the keeper and responsive to relative movement of the bolt and keeper in directions toward one another to swing the bolt to its latched position against the action of said spring.

7. A latch mechanism comprising a support, a latch bolt pivoted intermediate the ends on the support for swinging movement and having an open ended recess at one side of the axis of swinging movement for receiving a keeper element in response to swinging the bolt in one direction, an abutment extended across the plane of swingin movement of the bolt at the opposite side of said axis and mounted on the support for limited sliding movement along a path extending perpendicular to said axis, an edge surface on the bolt adjacent the open end of the keeper receiving recess slidably engageable with the abutment in one position of the latter to hold the bolt in a latched position and responsive to sliding movement of the abutment to another position to permit swinging the bolt to its released position including a coil spring bearing along the edge surface of the bolt opposite the abutment engaging edge surface aforesaid and having one end anchored to the bolt at the recess side of the axis of swinging movement of the bolt, and a pair of links straddling the bolt with adjacent ends pivotally connected to the abutment and with the opposite ends connected to the free end of the spring.

,p'pdi t r it d slidpats xte d na tchin surface'on the bolt srida i d age w ii qtfir nti'n ei epq- 'jsition dfthe l te ld t olt in a latched qs t n re r p s etc move j ntp t e but,- ine'nt to another po tion to permit swinging movement of the ijolt to it's released position, meahs'tieidabl org-rag the bolt to its released position including a cqil spring having one end anchored on the endof die "bolt adjacent the recess and having the opposite end connected to the abutment for yieldably urging the latter in a latching direction along said bolt surface, and a portion of the latching surface being inclined for wedgin engagement with the abutment in response to the action of the spring for continuously applying a force to the bolt in a direction to more intimately engage the latter with the keeper.

9. A latch mechanism comprising a support, a latch bolt pivoted intermediate the ends on the support for swinging movement and having an open ended recess at one side of the axis of swinging movement for receiving a keeper element in response to swinging the bolt in one direction, an abutment extended across the plane of swinging movement of the bolt at the opposite side of said axis and mounted on the support for limited sliding movement along a path extendin perpendicular to said axis, an edge surface on the bolt adjacent the open end of the keeper receiving recess slidably engageable with the abutment in one position of the latter to hold the bolt in a latch position and responsive to sliding movement of the abutment to another position to permit swinging the bolt to its released position, means yieldably urging the bolt to its released position including a coil spring bearing along the edge surface of the bolt opposite the abutment engaging edge surface aforesaid and having one end anchored to the bolt at the recess side of the axis of swinging movement of the bolt, means connecting the opposite end of the coil spring to the abutment for urging the latter to its latching position, and a portion of the latching surface on the bolt being inclined in a direction to cooperate with the spring influenced abutment for continuously applying a force on the bolt in a direction to more intimately engage the latter with the keeper.

10. A latch mechanism comprising a support, a latch bolt pivoted intermediate the ends on the support for Swinging movement and having an open ended recess at one side of the axis of swinging movement for receiving a keeper element in response to swinging the bolt in one direction, an abutment extended across the plane of swinging movement of the bolt at the opposite side of said axis and mounted on the support for limited sliding movement along a path extending perpendicular to said axis, a latching surface on the bolt slidably engageable with the abutment in one position of the latter to hold the bolt in a latched position and responsive to movement of the abutment to another position to permit swinging movement of the bolt to its released position,

i is "m vem nt Iale ieters-same eper rec ving recess forenga'ging new i i e v mo em if to swing; aforesaid, a. e te he bolt to "its latched position nism comprising a support, s ,,.J9Q1 s. rive e n e d t 7 t e j.i s t ti .ime .t er ea hip 5 for "swinging mbvem'ent about a common axis and having means at one side of the axis cooperating to engage a keeper in response to swinging movement of the bolts in directions toward one another, an abutment mounted on the support at the opposite side of the axis for sliding movement toward and away from the axis, cooperating cam surfaces on the bolts engageable by the abutment upon movement of the latter toward the axis for swinging the bolts toward each other into latching position, and coil springs having the adjacent ends respectively anchored on the bolts adjacent the keeper engaging ends thereof and having the opposite ends connected to said abutment.

12. A latch mechanism comprising a support, a pair of latch bolts pivoted intermediate the ends on the support in face to face relationship for swinging movement about a common axis and having means at one side of the axis cooperating to engage a keeper in response to swinging movement of the bolts in directions toward one another, an abutment mounted on the support at the opposite side of the axis for sliding movement toward and away from the axis, cooperating cam surfaces on the bolts engageable by the abutment upon movement of the latter toward the axis for swinging the bolts toward each other into latching position, coil springs having adjacent ends respectively anchored on the bolts adjacent the keeper engaging ends and having a bearing engagement with the outer edges of the bolts, and links respectively connecting the free ends of the coil springs to the abutment.

13. A latch mechanism comprising a support, a latch bolt in the form of a plate pivoted intermediate the ends on the support for swinging movement and having an open ended recess at one side of the axis of swinging movement for receiving a keeper element in response to swinging movement of the bolt in one direction, an abutment extended across the plane of swinging movement of the bolt at the opposite side of the axis and mounted on the support for limited sliding movement in directions toward and away from the axis, a latching surface on one edge portion of the bolt slidably engageable with the abutment in one position of the latter to hold the bolt in a latched position and responsive to movement of the abutment to another position to permit swinging movement of the bolt to its released position, said bolt having an arcuate edge portion opposite theedge portion aforesaid, a coil spring having one end fixed to the arcuate edge portion adjacent the keeper receiving recess and extending along the arcuate edge porper 'clirections,to'ward, one fi tion in bearing contact with the latter, a pin slidably engaging the arcuate edge portion on the bolt and connected to the free end of the coil spring, and links straddling the bolt with adjacent ends pivoted to the abutment and with the opposite ends connected to said pin.

14. A latch mechanism comprising a support, a latch bolt in the form of a plate pivoted intermediate the ends on the support for swinging movement and having an open ended recess at one side of the axis of swinging movement for receiving a keeper element in response to swinging movement of the bolt in one direction, an abutment extended across the plane of swinging movement of the bolt at the opposite side of the axis and mounted on the support for limited sliding movement in directions toward and away from the axis, a latching surface on one edge portion of the bolt slidably engageable with the abutment in one position of the latter to hold the bolt ina latched position and responsive to movement of the abutment to another position to permit swinging movement of the bolt to its released position, said bolt having an arcuate edge portion opposite the edge portion aforesaid, a coil spring having one end fixed to the arcuate edge portion adjacent the keeper receiving recess and extending along the arcuate edge portion in bearing contact with the latter, a pin slidably engaging the arcuate edge portion on the bolt and connected to the free end of the coil spring, links straddling the bolt with adjacent ends pivoted to the abutment and with the opposite ends connected to said pin, and a stop on the bolt engageable with the abutment in the released position of the bolt.

ROBERT JELLISON.

No references cited.