US731691A - Lock. - Google Patents

Description

No. 731,691. PATENTED JUNE 23,1903.

J. KRAJICEK.

LOCK.

APPLICATION FILED APR. 9, 1903.

N0 MODEL.

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UNITED STATES PATENT Patented June 23, 1903.

OFFICE.

LOCK.

SPECIFICATION forming part of Letters Patent No. 731,691, dated June 23, 1903. Application filed A n 9, 1903. Serial n0. 151,721. (No model.)

To all whom/iv may concern.-

Be it known that I, JosEPH KRAJICEK, a

' citizen of Austria-Hungary, residing at Elizaboth, Union county, New Jersey, have invented certain new and useful Improvements in Door-Locks, of which the following isa specification.

This invention relates to a doorlock in which the latch and bolt may be operated a side view of my improved door-lock, showing the lock-cases open; Fig. 2, a similar View showing the parts in adifferent position and section on line 3 3 Fi 1- Fi 4 a section with the lifters partly broken away; Fig. 3, a

on line 4. 4, Fig. 1; Fig. '5, a section on line 5 5, Fig. 1; Fig. 6, a detail of the bolt-operating mechanism; Fig. 7, a cross-section on line 7 7, Fig. 6; Fig. 8, a perspective view of the double pawl; Fig. 9, a perspective view 1 of the latch-operating key-bit, and Fig. 10a

to engage notch 0 similar view of the bolt-operating key-bit.

The letter a-representsa main lock-case hav-inga latch 12, with back spring 'b' and a bolt 0. The latch may be operated from the inside by a knob-spindle 01, having finger d, that engages the notch b The bolt 0 has a tumbler e engaging either of the notches c. It may be operated from the inside bya key D, inserted through keyhole a and adapted In addition to these means for manipulating the look I employ additional means, which are placed at a distance from the lock proper and which upon being broken or tampered with will not injuriously affect the operativeuess of the lock.

7 The additional means for operating the lock are as follows: At a distance from the case a there is secured an auxiliary lock-case f, with keyhole f. The casef has wards g at one side of the keyhole f, adapted to be cleared by the bit of a latch-key A, and with wards h at the opposite side of the keyhole,

in case a will remain intact.

adapted to be cleared by the bit of a boltkey B. Beyond the Wards g is arranged the upper-headed end i of a liftert', which passes with its lower end into the lock-case a. Here the lifter i is by pin 1' connected to a pawlj, fulcrumed to case a at j. The pawl j ongages a notch 19 of latch b, so that when the lifter t' is raised by means of the key A the latch is opened. 'When the key is withdrawn, the latch will be closed by its springb. Beyond the wards h is arranged the upper end of v a lifter 7t, having upper projection 7c, lower projection 10 and guided, ifdesired, within a grooved rail Z. The lower end of litter passes into the lock-case a and is here connected bypin 76 with a double pawl m m, fulcru med to case a at m The double pawl 'is com posed of two integral fingers arranged side by side, and of which the finger m is blunt, while the finger m is pointed. The blunt finger m is adapted to engage and depress the tumbler e, while the pointed finger m shoots the released bolt. Thus as the key B raises lifter It by upper projection 70' the double pawlis swung backward to retract the bolt, Fig. 2. When the key B depresses lifter 70 by lower projection 71: the double pawl is swung forward to open the bolt, Fig. 1.

It will be seen that if the upper lock-case f should be burglarized the lock proper with- If the lockcase fand its inclosed operative mechanism should be destroyed, the occupant of the room may still open the door by means of the knobspindle d' and key D.

What I claim is- 1. A look composed of a main lock-case, an inclosed latch and bolt, an auxiliary lock case having double wards, a pair of lifters entering both cases on opposite sides of the wards, and means for operatively connecting said lifters to the latch and bolt respectively, substantially as specified.

2. A look composed of a main lock-case, an inclosed bolt and tumbler, an auxiliary lockcase,a key-operated lifter extending into both cases, and a double pawl pivoted to the lifter and engaging both the bolt and tumbler, sub I stantially as specified.

Signed by me at Elizabeth, New Jersey this 6th day of April, 1903.

JOSEPH KRAJICEK.

Witnesses: Y

GEORG EISENRIETH, HENRY SCHMELZER.

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