US534707A

US534707A - Combined latch and check

Info

Publication number: US534707A
Authority: US
Publication date: 1895-02-26
Anticipated expiration: 1912-02-26

Description

(No Model.) 3 She'etsS heetf 1. R. WRIGHT. COMBINED LATCH AND CHECK.

No. 534,707. Patented Feb. 26. 1895.

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COMBINED LATCH AND CHECK. No. 534,707. Patented Feb. 26, 1895.

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RUFUS WVRIGHT, OF'OHIGAGO, ILLINOIS.

COMBINED LATCH AND CHECK.

SPECIFICATION formingpart of Letters Patent No. 534,707, dated February 26, 1 895.

Original application filed January 8, 1894, S ial N 496,099. Divided and this application filed January 8,1894. Serial No. 496,100- (No model.)

To all whom it may concern.-

Be it known that I, RUFUS WRIGHT, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a certain new and useful Gombined Latch and Check for Doors and the Like, of which the following is a specification.

This application is filed as a division of my application, Serial No. 496,099, for Letters Patent of the United States, filed of even date herewith. My said application, Serial No. 496,099, embodies several forms or arrangements of combined latch and check, adapted to normally or ordinarily oppose the closing of a door with a yielding spring resistance of sufticient strength to act as a check against undue slamming of the door, and also adapted to permit the catch or latch to be relieved at will from the normal spring resistance 0p posed to its retraction when it is forced back by the act of closing the door,whereby, when the door is closed and latched and it is desired to unlatch and open the same, the latch can be relieved from said normal spring resistance and hence can be manually retracted with ease. V

For the purpose of this application I have elected to specially claim herein the arrangement or construction involving a spring resistance which normally opposes the retraction of the latch so as to provide a check for preventing undue slamming of a door or the like, and a movable abutment normally and temporarily interposed between the spring resistance and the latch, so that while the abutment is thus interposed between the latch and spring resistance, the retraction of the latch will be opposed by the latter, while on the other hand, by freeing the movable abutment from engagement with the latch, the latter will be entirely relieved from such spring resistance and hence can be manually retracted with great ease. To such end therefore I provide in conjunction with the latch, and a spring resistance preferably consisting of a yielding spring cushion, a movable abutment subject to the spring and adapted to interlock with the latch, whereby by unlocking said device the latch can be retracted independently of the same.

' In the accompanying drawings,-Figure 1 represents a section taken longitudinally through the casing, and illustrates in elevation, an arrangement whereby the latch can be entirely relieved from the spring resistance of an elastic air-cushion. Fig. 2 is a face or plan view of the same with the cover or faceplate removed. Fig. 3 is a view similar to Fig. 1, showing the latch relieved from the spring resistance. Fig. 4: illustrates the latch or catch removed. Fig. 5 illustrates the movable abutment which can be interposed between the latch and spring resistance and normally interlocked with or placed subject to the retraction of the latch. Figs. 6, 7 and 8 respectively correspond with Figs. '1, 2, and 3, the devices being similar in principle but involving slight changes in detail, as hereinafter explained. Fig. 9 shows the swinging latch of Figs. 6, 7 and 8. Fig. 10 represents in perspective the key for disengaging the movable abutment from the latch, and for retracting the latch when the movable abutment is disengaged therefrom. Fig. 11 shows in perspective the latch, the elastic air-cushion, the movable abutment, and the key, the forward end of the movable abutment being raised by the key from engagement with the latch. Fig. 12 is a similar view showing the latch partially retracted by the key.

Referring first to Figs. 1 to 5, inclusive, the latch A, normally retracts against a spring resistance or an elastic air-cushion B through the intervention of a movable abutment 0, arranged to normally provide a rear extension for the latch. The rear end a of this movable abutment temporary latch extension abuts against the elastic air-cushion B, and the latter is simply provided with a constantly open pin-hole .or minute vent b. This movable abutment C is separate from the latch, and has its forward portion arranged within a slot at, in the latch. The slot at is formed with a shoulder a, and the movable abutment is provided with a shoulder 0' '(Figs. 4 and 5). Said shoulders of the latch and movable abutment are normally orusually in engage ment with one another, so that when the latch is moved back by the act of closing the door, the latch will in effect be retracted against the full or normal resistance of the elastic aircushion. In order to relieve the latch from such resistance, so that it can be easily retracted, the movable abutment O can be raised so as to free it from positive engagement with the latch, it being seen that the slot in the iatch is of sufficient width to admit of such movement on the part of movable abutment O, and that when the forward portion of the latter is thus raised, its shoulder 0' will be freed from shoulder a in the latch-slot, and thereby allow the latch to be retracted independently of the movable abutment O. During said operation, the portion of the movable abutment 0 within the latch-slot will simply rest upon the forward inclined bottom wall a of said slot, so that while the abutment C remains passive, the latch will be moving back, and while thus operating will be relieved from the spring resistance normally opposing its retraction. After thus retracting the latch, and opening the door, the latch can be moved forward either man ually'or by any desired arrangement of light spring arranged independently of the spring cushiori A. For example, a key comprising a spindle E having a ward e, can be used for unlocking the movable abutment 0 from the latch and for both retracting and projecting the latch while it is thus relieved from the resistance of cushion A. With such arrangement, the Ward 6 on the spindle can be arranged for operation between shoulders a a on the latch, so that the latter can be operated by the spindle similar to the operation of a latch by the ward of an ordinary key. The ward e of the spindle can also be employed for unlocking movable abutment C from the latch, and to such end, it can be arranged so that when the spindle is turned in one direction, it will come under the forward inclined end portion of the movable abutment O and thus suitably lift the same out of locking engagement with the latch, and

then engage shoulder a on the latch so as to retract the latter.

Obviously a coiled spring could be applied to the spindle so as to cause it to normally project the latch, or a light spring could be applied to the latch for such purpose, and since springs for normally projecting latches are so well known and common devices it is not deemed necessary to make special illustration of the same one illustration of a light spring for normally projecting a vibratory latch being shown in succeeding figures. In order to insure positive engagement between the movable abutment O and latch when the latter is projected as in Figs. 1 and 2, a spring F is secured within the casing Gand arranged to bear upon said movable abutment. By such arrangement the forward portion of the movable abutment G will be caused to drop and engage or rest in opposition to the stop or shoulder a of the latch when the latter has been projected as in Fig. 1.

In Figs. 6 to 9, inclusive,'the construction shown involves the principles of operation of the construction illustrated by the preceding figures, the principal difference between said two sets of figures being in details. Thus, in Figs. 6 to 9, inclusive, the latch A isa swinging latch and to such end is pivoted at a within the casing. The slot 0, of this swinging latch is curved and has a notch a at its rear end. The movable abutment O has its rear end 0 arranged to normally act against and compress the elastic air-cushion B, and to such end the forward portion of said movable abutment is forked to embrace the latch and provided with a cross-pin c which is normally within notch a at the rear end of slot a in the latch. By such arrangement the movable abutment O can be temporarily locked to the latch so that when the latch is forced back by the act of closing the door, it will be opposed by the full or normal resistance of a spring afforded by the elastic aircushion. In order to relieve the latch from the spring resistance normally opposing its retraction, the key spindle E has the ward 8 formed similar to the ward of key spindle E in preceding figures and arranged to engage under and slightly raise the forward portion of movable abutment 0 when the spindle is turned in a direction to retract the latch and thereby lift pin 0 out of notch 6L7. Further movement of the key spindle in thesame direction causes its ward to engage a stop a on the latch and thereby retract the latter independently of the movable abutment O, as in Fig. 8.

From the foregoing it will be seen that during the use of the latch and elastic air-cushion as a check to prevent the slamming of a door or the like, the latch in both arrangements is normally opposed by the full elastic resistance, and that when for example the door is closed and it is desired to open the same, the latch'can be entirely relieved from the resistance of spring cushion B by unlocking or disengaging from the latch, the movable abutment normally interposed between the latch and cushion as a temporary portion of the latch.

What I claim as my invention is.

1. A combined latch and check comprising a latch, a spring resistance, a movable abutment normally interposed between the latch and the spring resistance whereby the automatic retraction of the latch shall force the abutment against the spring resistance and thereby cause the latter to oppose such retraction on the part of the latch, said abutment being also adapted and arranged for disengagement from the latch, and means whereby the said abutment may be disengaged from the latch and the latter retracted independently of the movable abutment and without opposition on the part of the spring resistance, substantially as set forth.

2. A combined latch and check comprising a latch, an elastic air-cushion, a movable abutment constituting a power transmitting device normally interposed between the two and arranged for alternate connection with and disconnection from the latch as a power transmitting medium, and a key for temporarily disconnectingsaid device from the latch, substantially as set forth.

3. A combined latch and check comprising a latch, an elastic air-cushion, a movable abutment constituting a power transmitting device normally interposed between the two and arranged for alternate connection with and disconnection from the latch, and a key adapted and arranged for both disconnecting said abutment from the latch and for retracting the latter, when the abutment is freed therefrom, said'latch being provided with stops between which the ward e of the key is arranged, one of said stops being positioned to be engaged by the said ward when the key is operated to raise the abutment from engagement with the latch; and the other stop being arranged to be engaged by said ward when the key is operated to allow the abutposed to itsretraction, a stronger spring resistance normally opposing its retraction, and means for temporarily relieving the latch from the stronger spring resistance, substan- 5 tially as and for the purpose set forth.

RUFUS \VRIGHT.

Witnesses:

BETA M. WAGNER, CHAS. G. PAGE.