US178243A - John p - Google Patents

Description

J. P. KISLINGBURY.

1 BURGLAR-ALARMS.

l;-\10 178|243,V Y Patented June 6,1876..

l their inner edges.

UNTED STATES PATENT @Frio JOHN P. KrsLINGRURY, OE ROCHESTER, NEw YORK.

IMPROVEMENT IN BURGV'LAR-ALARMS.

Specication forming part of Letters Patent No. 178,243, dated June. 6, 1876; application led April e, 1876.

To all whom. fit may concern Be it known that I, JOHN P. KISLINGEURY, ot' the city ofItocllester, in the county of Monroe and State of New York, have invented a .certain new and useful Improvement in Combined Door-Bolts and Burglar-Alarms; and I do hereby declare that the following is a full, clear, and exact description of the construe tion and operation of the same, reference be ing had to the accompanying drawings, in

Figurell is a front elevation of my improvement applied to a door. Fig. 2 is a plan of one ofthe double-acting bolts. Fig. 3 is a detail view.

My improvement relates to those alarms which are operated by the door-knob.

The invention consists ofdouble-acting bolts, i

is the spindle ot' the ordinary door-knob.

D is the ordinary lock-bolt or latch. E is the alarm-bell, which may be attached to the door in any desired position. The alarm is struck by two hammers, F F, pivoted upon studs a a, and resting inside the bell in any ordinary manner. No other mechanism is required in the bell. i Gr is a plate attached to the door in line with the lock. H H are cases or sockets forming a part of the plate. I I are the double-acting bolts, which run through the cases and shoot into the keepers K K of the jamb. l' l are arms of the bolts. They are pivoted at c c to the ends of the bolts, and are provided with a series ot teeth or cogs, d d, on L is a gear, attached fast to rthe knob-spindle, and engaging with the two toothed arms, as shown in Fig. l. This gear may be toothed all the way around, or

only on the two opposite sides, as shown.

It will be seen that, as the knob `is turned, the two bolts I I will be thrown, one forward andthe other back, the action being reciprocal.

M M are two links, having studs or pins at their ends, which rest in longitudinal slots j' f of the rack-bars Il l. .Their opposite ends meet at an angle, and are secured upon a screwbolt, g. The screw-bolt slides in a slot, k, Fig. 3, ot' tllecase, and has a shoulder,', on the inside, and va clamping-nut, k, upon the outside. Each ot' the links M has a slot,` l, which rests over a stationary, pin, m.

'When the screw-bolt g is drawn back in the slot h, as shown in full lines, Fig. 1, the links are depressed, so that the rackLbars I l fall into engagement with the gear L, and the double-acting bolts I I can then receive motion from the door-knob; but when the screwbolt is pushed forward, as shown in dotted lines, the rack-bars are then elevated from engagement with the gear L, 4and the doorknob then runs free. This is owing to the ruiming ot' the links on the fixed pins m m. The linlrs can be clamped in either position by the nut 7c.

During the night the rack-bars are placed in engagement with the door-knob, as above described, in which case the bolts I I are alternately thrown into and out of their keepers by turning the knob in opposite directions. These bolts act in conjunction with the Ordi` 'nary lock-bolt, inasmuch as the latter cannot be Withdrawn from 'its keeper before one or the other of the double-acting bolts will be thrown into engagement with the jamb.

The invention above described is designed to afford additional ,security against burglars and tram ps, by employing a device which is positive and sure in its engagement. The ordinary lock-bolt Vor latch alone is Very insecure. During the day the rack bars are thrown out of engagement, thereby allowing the door to be opened and closed without i111-, pediment.

The form of the plate G is such that the bolts 'are made rightV and left by simply inverting the plate. If desired, the plate may be made in the form Ot' an inclosing-case, like an ordinary lock-case. P is a rock-arm or counection extending from the bolt-work np to the alarm. It is pivoted at p to the door, and at the lower end it has a slot, r, which rests over a pin, s, of the vupper rack-bar. I. the rack-bar is thrown the rock-arm will be correspondingly rocked. lAt the top are two boxes, t/t,in which restboltsu u, thrown up by coiled springs v n. The upper ends of these bolts rest between the tangs w w of the bellhammers. The tops of the bolts are made inclined downward toward the center, and the ends of the tangs w lw are made correspondingly inclined. As the rock-arm is rocked in one direction or the other the bolts will strike the hammers, and spring the same as they pass from under them. On the return the spring-bolts will yield 'and pass under the hammers and center themselves again.

This device is very simple, and obviates much of the mechanism in common burglaralarms. It is eifective against burglars and tramps. v,

.I do not claim, broadly, a swinging arm and a spring-bolt for-soun'clingthe alarm.

What I claim as new is- ,1.,The combination, with the gear L and double-acting bolts I I, of the pivoted rackbars I I', arranged to be connected with or disconnected from the said gear, as and for the purpose specified. Y

2. The combination, with the pivoted rackbars I Il, of the links M M, sliding screw-bolt g, and clamping-nut k, as and for the purpose specified." v

3. In combination with the door-bolts. I I and the two hammers F F, the rock-arm P, connected with the door-bolts by a slot and pin, and provided at its upper end with the springbolt u u, the tops ot' said spring-bolts being beveled inward to allow them to center between the ham mers, as shown and described,

.and for the purpose specied.

v In witness whereof I have hereunto signed my name in the presence of two subscribing

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