US1573866A

US1573866A - Latch construction

Info

Publication number: US1573866A
Application number: US471538A
Authority: US
Inventors: James B Rogers
Original assignee: Individual
Current assignee: Individual
Priority date: 1921-05-23
Filing date: 1921-05-23
Publication date: 1926-02-23
Anticipated expiration: 1943-02-23

Description

Feb. 23 ,1926.' 1,573,866

J. B. ROGERS LATCH CONSTRUCTI'ON Filed May 23. 1921 3 Sheets-Sheet 1 Feb. 23 1926. 1,573,866 7 I J. B. ROGERS V LATCH CONSTRUCTION Fiied May 2. 192; s Sheets-Sheet 2 1,573,866 Feb. 23,1926. i B. ROGERS LATCH CONSTRUCTION Filed May 23, 192i 3 Sheets-Sheet 5 Patented Feb. 23,1926. UNITED STATES PATENT OFFICE.

JAMES BpBOGEBS, OF CHICAGO, ILLINQIS.

LATCH CONSTRUCTION.

Application filed Kay 23, 1921. Serial No. 471,538.-

vTo/all whom it 'may concern:

Be it known that I, J AMES 3. Rooms, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented new and useful Improvements in Latch Constructions, of

which the following is a full, clear, concise,

and exact description, reference being had to the accompanying drawing, forming a part of this specification.

My invention relates to latch construction.

One of the objects of my invention is to provide an improved latch which will be positive in its action. i

A further object of lily-invention is to provide a latch construction in which the latching member has a combination sliding and pivotal motion.

A further object of my invention is to provide a latch construction in which the latching member is disengaged by pushing it inwardly and swinging it upwardly.

A further object of my invention is to provide an improved latch construction in which the latching member is held in latching position by a retaining member, Which retaining member is released by the-member which actuates'the latch.

Further objects will appear from the detailed description to follow and from the appended claims.

In the drawings in which several embodiments of my invention are shown-- Fig.1 is a side elevation of a latch construction showing the latching member in latching position; i

Fig. 2 is a View of the construction shown in Fig. l with the. latching member in unlatched position;

Fig( 3 is a side elevation showing another form of latch construction;

Fig. 4 is a top plan view of the construction shown in Fig 3;

Fig. 5 is a side elevation showing another Fig. 10 is a section substantially on the line 1010 of Fig. 9.

Referring first to Figs. 1 and 2', the construction sho'wn therein comprises a latching member 10,.a pivoted hook 11 with which the latching member 10 engages, means 12 for mounting the latching member 10 for pivotal and sliding movement, a pivot-ed retaining member 13 for holding the latching member 10 in latching position, and pivoted actuating member 14 for releasing the retaining member 13, and actuating the latching member 10 to move it from latching to unlatching position, and vice versa.

The hook member 11 is pivotally mounted ona pin 15, and is counterweighted as indicated at 16 to normally hold this hook in the position shown in Figs. 1 and 2. Stops 17 and 18 are provided to limit the pivotal movement of the hook 11. As will be explained hereinafter, the latch construction would be operative even if the hook 11 were rigid, but the hook is pivotally mounted in order that the latch may be brought into latching position without the necessity for any pivotal movement of the latching member 10.

In order to facilitate an understanding of the movement, it is here stated that in the construction shown in Fig. 1 there, are four fixed pivotal points or axes, as follows: the axis of the in 15 on which the hook member 11 is pivotally mounted, the axis of the pin 19, about which the latching member 10 is pivotally and slidably mounted, the axis of the pin 20, on which the actuated member 14 is pivotally mounted, and the axis of the pin 21 on which the retaining member 13 is pivotally mounted. The retaining member 13, when in retaining position as shown in Fig.1, holds the latching .member 10 in horizontal latching position by engagement with the shoulder 22 on the latching member 10. In order that this retaining member 13 may be lifted to reform of latch construction, parts being lease the latching member 10 so that the shown in section;

Fig. 6 is a side elevation of the construction shown in Fig. 5 with the latching member starting to unlatch;

Fig. 7 is a side elevation showing another form of latch construction;

Fig. 8 is a top plan view of the construction shown in Fig. 7

Fig. 9 is a side elevation showing a latch construction suitable for'e'levator work; and

this initial movement of the actuating member 14 is utilized to release the retaining member 13, the actuating member being provided with a spiral edge cam 23 which engages underneath the pivoted retaining member 13, and lifts this retaining member upward out of engagement with the shoulder 22, duringthe initial movement of the actuating member 14. The lost motion connection between the actuating member 14 and the latching member 10 is effected by providing the latchingmember 10 with a pin 24, for engagement with an arcuate slot 25,.in the actuatin member 14.

Stops 26 and 27 may e provided to limit the movement of the holding member-13, and prevent it being raised too high or dropping too low.

The means 12 for mounting the latching member 10 for pivotal and sliding movement comprises a pair of rollers 28 mounted in a rocker 29, which rocker is pivotally mounted on the pin 19. The rollers 28 operate in a slot 30 in the latching member 10, and provide an'anti-friction mounting for the latching member.

In using the device, if the parts are in position shown in Fig. 1, and it is desired to move them to unlatched position, the

, operator takes hold of the handle 31 of the operating member 14 and moves it to the right, flO'l'Il the position shown in Fig. 1 to the position shown in Fig. 2.- The first part of the movement of the actuating member 14 lifts the retaining member 13 without moving the latching member 10.

At about the time the holding member 13 is lifted out of engagement with the shoulder 23, or shortly thereafter, the end wall of the arcuate slot 25 engages the pin 24, and starts the movement of the latching member 10. The movement of the hook end 32 of the latching member is a somewhat peculiar one, as indicated by the dotted line 33 in F ig. 2. which shows the path of the point of the hook 32. As shown by this dotted line path, the first movement of the latching member 10 is inwardly at a slightly upward incline to easily efiect the disengagement of the hook end 32 of the latching member 10 from the hooked end 34 of the member 11. Further movement of the actuating member 14 brings the latching member 10 to the position shown in Fig. 2. It will be noted that this construction is suitable for an elevator door, since if the latching constructure is -mounted on a sliding door 34 I the movement of the actuating member 31 is such that the movement of this member tounlatch it, if continued, would cause the door to slide open. In closing the door and moving .the latching member 10 to closing position, it is immaterial whether the latching member 10 is moved to hori zontal position before or after the door is closed. If the door is closed first, the latching member 10 can be moved to closed position by swinging the actuating member 14 tr m h p ition m s ig-2' #9 the position shown in Fig.1. If, however, the latchin member is swung to the position shown in ig. 1, before the door is closed, the hook member 11 will simply be depressed by the engagement of the slanting surface 35 is closed. In this construction the retains ing member 13, and the actuating member 14 may be the same as in the form previously described. In this form, however, the hook member 37 is rovided with a laterally extending boss or ug 38, .the outline of which is shown in dotted lines in Fig. 3, and the latching member 39 is also provided with a laterally ofi'set boss 40, which engages the boss 38, as shown in Fig. 3. The boss 40 is hook-shaped in elevation, as shown in dotted lines in Fig. 3, and this hook-shaped portion receives the rounded portion of the boss 38. WVhen the actuating member 14 is operated, the point of the latching member 39 follows the path indicated in dotted lines at 42, the shape of the boss 40 being such as to permit the latchin member 39 to move inwardly and upward y to disengage the boss 40 from the boss 38. The latchin member 39 is pivotally and slidably mounted on a pin 43, mounted on the door 44, this pin 43 engaging the slot 45 in the latching member. The lost motion connection between the actuating member 14 and the latching member 39 is effected by means of the pin 46, which engages the slot 25 in the actuating member 14.

In this form, also, it is not necessary that the door should be closed before the latching member 39 is moved to horizontal position, since if the latching member 39 is moved to horizontal position and the door is afterward moved to closed position, the slanting edge 47 of the latching member will simply ride underneath the slanting edge 48 of the boss 38, lifting up the hook member 37 un til the boss 40 passes the boss 38, after which the hook member 39 will drop down into latching engagement with the latching member 39.. a

The construction shown in Figs. 5 and 6, is substantially the same as that shown in Fig. 1, except that in this form the latching member. 48 engages a fixed pin 49, and the operating member 50 is provided with a keyeaael' 1. 1s he eg mate 1 m y the same as in the form scribed. The actuating mem r 50 is operated by means of a key-controlled member 51, having a lost motion connection with the operating member 50 as indicated in Fig. 5, the lost motion connection being such that a complete revolution of the key-controlled member 51 will give the operating member a sufficient movement ofoscillation to move the latching member 48 from latching to un latching position or vice versa. The lost motion connection between the key-controlled member 51 and the actuating member 50 is effected by providing the hub ofthe actuating member 51 with a chamber in whlch the key-controlled member 51 is mounted, the wall of this chamber being provided with a shoulder 52, which is engaged by the key-controlled member 51. Any suitable or usual construction may be provided, where by the. member 51 will be key-controlled, such as a'Yale lock construction shown at 53, the key-controlled member 51 being arranged to rotate with the barrel of the lock 53.

- The arran ement is such that a complete rotation of th key such as is necessary for operating the lock 53 will move the latching member 48 from one of its extreme positions to the other.

In all of these forms, it will be noted that the first movement of the latching member is an inward movement, which readily effects the disenagagement of thelatching member from the hook or fastening member with which it cooperates.

The construction shown in Figs. 7 and 8 is substantially the same as that shown in Figs. 3 and 4, except as to the engagement between the latching member 54 and the hook member 55. In this form the hook member 55 is bifurcated, to provide two arms 56, which straddle the latching member 54. The arms 56 are provided with laterally extending bosses 57, shown in out line in Fig. 7, which engage the ends of a transversely extending pin 58, which extends through the latching member 54 and laterally on both sides thereof. The holding member 13 and the operating member 14 may be the same as in Figs. 3 and 4. In this form, when the latching member 54 is being moved to unlatching position, its inner end moves upwardly and inwardly between the arms 56, the pin 58 moving clear of the laterally extending bosses 57 during this movement.

- The latching member 54 can be moved to closed position either before or after the closing of the slidingdoor 59. If the door is closed before the latching member 54 is moved to latching position, this latching member will swing down into latching position from above, the inner end of the latchits m mber 4 ha ing down between the pzeviously dearms 56 and the pin 58 moving into latching relation with res ect to the bosses 57. If, however, the late ing member 54 is swung to horizontal position before the door is closed, and the door is afterward closed, the end of the pin 58 will simply ride underneath the slanting ends 60 of thearms 56, lifting the hook member 55 until the ends of the pin 58 pass the laterally extendin bosses 57, when the hook member 55 will drop down into latching relation with respect to the pin 58.

The construction shown in Figs. 9 and 10 is substantially the same as that shown in Figs. 5 and' 6, except that in this form a gear transmission 58 is provided between the operating lever 59and the oscillating member 60, whereby the oscillating member 60 will be made to travel through a greater are than is traversed by the operating handle 59. This enables a relatively short movement of the operating handle 59 to effect the necessary oscillatory movement of the member 60 for operating the retaining member 13, and the latching member 48. This gear transmission 58. comprises a segmental gear 60 mounted on the shaft 61 on which the handle 59 is mounted, and a pinion 62 meshin the segmental gear 60, and secured to t e oscillatory member 60 which operates the retaining member 13 and the latch member 48. It will be noted that this construction also is suitable for an elevator door,'since if the latching construction is mounted on a sliding door, the movement of the actuating handle 59 is such that a movement of this member to unlatch .the door, if continued, would cause the door to slide open. As the gear ratio between the gear 60 and the pinion 62 is shown as about 2 to 1, it is only necessary to move the handle 59 through about 45 degrees to effect the necessary movement for-the operation of the latching member 48.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent of the United States is:

1. A. latch construction comprising a hook member, a pivoted hook operating member, means for mounting said hook for pivotal and sliding movement about asupport eccentric of the axis of the pivoted hook operating member, said hook operating member having a pivotal connection with the hook member eccentric to the axis of the hook operating member.

2. A latch construction comprising a hook member, a catch for holding said hook member in latching position, a pivoted member for operating both'hook and catch, means for mounting said hook for pivotal and sliding movement about a support eccentric to the axis of the operating member, said opcrating member avmg a lost motion conthe axis of the member, said operating member acting to release the catch during its lost motion movement and acting to ive the hook member its pivotal and sli ing movement after its lost motion movement.

3. A latch construction comprising a hook member, a catch for. holding said hook member in latching position, a pivoted member for/ operating both hook and catch, means for mounting said hook for pivotal and sliding movement about a support eccentric to the axis of the o crating member, said operating member aving a lost motion connection with the hook member eccentric to the axis of themember, said operating member acting to release the catch during its lost motion movement and acting to give the hook member its pivotal and sliding movement after its lost motion movement, said lost motion connection comprising'a pin and.

slot connection, said slot being arcuate with its center inthe axis of the operating member. s v

4. A latch construction comprising a movable hook member, a holding member over which said hook member engages, means for mounting said hook member for pivotal and 1 slidin mOVementlOngitudinally towards said olding member and laterally away from said holding member for releasing the hook member from the holding member and actuating means for positively eflfecting said longitud nal and lateral movement. 7

5. A latch construction comprising a movable hook member, a holding member over which said hook member engages, means for mounting said hook member for pivotal and sliding movement longitudinally towards said holding member and laterally away from said holding member for releasing the hook member from the holding member and actuating means for positively effecting said longitudinal and. lateral movement, said actuating means comprising a ivotally mounted hook operating member aving a pivoted connection with said hook member for unlatching it and said mounting'means comprising a support eccentric to the aizis of i said pivotally mounted operating member on which support said hook member has a pivotal and sliding movement.

In witness whereof, I have hereunto subscribed my name.

JAMES B. ROGERS.