US293548A - Bruno wesselmann - Google Patents

Description

To all whom it may concern:

QlNiTED STATES PATENT.' Ormea BRUNO `VESSELMANN, OF HAMBURG, GER-MANY.

DOOR-LOCK.

SPECIFICATION vforming part of Letters Patent No'. 293,548, dated February 12, 1884.

Application filed CctalzcrV 2; 1853. (No model.) Patented in Germany December !l.1SE2,No.23,011.

Be it known that I, `BRUNO WEssELMANN, a subject of the Emperor of Germany, and a resident of Hamburg, in the German Empire,- have invented certain new and useful Im provements in Door-Locks, (for which Letters Patent have heretofore been granted to me by the Government of Germany,under date of December 9, 1882, numbered 23,911,) of which lthe following is a specication.

The invention relates to certain improvements in door-locks, by which the construction of the saine is considerably simplified; and the invention consists, iirst, of the combination, with the spring4bolt, main bolt, and latch, of a spiral spring that is interposed between an extension of the springbolt and the tumbler of the main bolt, said tumbler having a downwardlyextending arm that engages the latch,

so that thereby the bolts and latch are acted upon by one spring only; and, secondly, of a nut placed on the knobspindle, and being made of two parts7 of an interior portion and an exterior sleeve-shaped portion, which latter is guided by a slot on a guide-stop of the interior portion, between-which anda shoulder of the knob-spindle a spiral spring is interposed, that retains by its pressure the inner j nut in position when the door is thrown into closed position.

Inthe accompanying drawings, Fi gurel represents a side elevation of my improved doorlock, shown partly in section, and with the cover removed; and Figs. 2 and 3 are respectively a vertical transverse and horizontal section on lines m a: and y y, Fig. l.

`Similar letters of reference indicate corresponding parts. A in the drawings represents the casing of my improved door-lock, in which is arranged, one below the other, a spring-bolt, e, a main bolt, 7L, and a latch-bolt, f. The spring-bolt e projects with it-s beveled end through an aperture of the face-plate of the casing, and is guided in the usual manner bya slot, e, on a iiXed transverse pin, e2, of the casing. The inner end of the spring-bolt e is hinged to projecting ears aL of a nut, a a, through the square center hole of which the knob spindle b is passed. A hook-shaped prolongation, a?, extends backwardly from the projecting ears of the nut a, and is acted upon by a slide-bolt,

c, that is guided in a socket, c2, and cushioned by a strong spiral spring, e, which is interposed between the slide-bolt c and the bottom of the socket.

the concave under side of the hook ai.` The The outer end of the slide-bolt c is rounded off, so as to move readily along j.

lower end of the socket c2 is made of conicallytween the spring-nut a a and the tumbler g the spring c acts on all the three bolts e, Vh, and f ofthe lock, according as either one of them is thrown into use. `It acts on the springbolt e by the pressure of the slide-bolt c', and on the main'bolt h'and latch f by the pressure of the socket c2 on the tumbler g. TheV construction of the lock is thereby considerably simplied, as the different springs,which have heretofore been required in connection with the different bolts, are replaced by the single spring c.

For the purpose of preventing the turning of the knob-spindle and knobs when thelock is closed by pushing the door into closed position without taking hold of the knob, the nut an on the spindle is made of two parts-an interior nut, a, and an exterior sleeve c. The exterior sleeve, a', is provided with a slot, a5, through which projects a guide-stop, as, that is xed to the inner nut, a, so as to communicate the motion of the knob-spindle to the sleeve a', and thereby to the extension-hook a2 of the spring -bolt e. A spiral spring, d, is inter posed between the inner nut, a, and a shoul-V der, b', of the knob-spindle Z, as shown in Fig. 2, which spring presses tightly upon the inner nut, a, so as to keep the latter in position when the spring-bolt is pushed back into the casing A on throwing the door into closed position without taking hold of the knob. The spiral spring d exerts a frictional pressure upon the interior nut, a, which pressure is sufliciently IOO swung to prevent the nut a from following the motion of sleeve a, caused by the pushing in of the spring-bolt e. The sleeve e movesi thereby freely around the nut ce until the guidestop ai of the nut a arrives at the end of the slot ai of the sleeve a', and stops thereby the sleeve. Then the spring-bolt is moved forward again by the mainspring c, the sleeve a movesA in opposite direction on the nut a until the opposite end of slot a5 arrives at the guide-stop a". When, however, the door is opened or closed by taking4 hold of and turning the knob, the inner nut, a, takes, by its guide-stop a, the sleeve a along, and draws thereby the springbolt c back in the usual manner.

I-Iaving thus described my invention, I claim as new and desire to secure by Letters Patentl. The combination of the knob-spindle Z), nut a a', having ears a* and extension-hook f, spring-bolt e, hinged to the ears a, spring' actuated slide-bolt c', guidesocket c?, tumbler g, having -a seat for the guide-socket and a downwardly-extending arm, g g2, main bolt 7l, and latch f, substantially as set forth.

ing a guide-slot, a, extension-hook a2, and ears A a, spring-holte, hinged to the ears a, and a spiral spring, d, interposed between a shoulder, b', of the spindle and the interior nut, e, substantially as set forth.

In testimony that I claim the foregoing as my invention I have signed my name, in presence of two Witnesses, this 11th day of September, 1883.

BRUNO wnssnLMNN.

XVitnesses:

ALEXANDER Srnoirr, EMIL HAAsn.

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