US128683A - Improvement in motors for signal-alarms - Google Patents

Description

3 Sheets-Sh'eetL J. WALK.

lImprovement in Motors for Signal-Alarms. N0.128,683I

Patented July 2, 1872.

tttttutttttttttutt.

l IJ. WALK- I vv3Shref`ats--Sloeet3.

` Improvement in Motors forS'gnaI-Alarms.`

No.128,683,.V vFiller-ZE l Patentedlulyznsu.

:such effect at pleasure. Apreventing the `collapse of the air-chambers PATENT *Orrrcn JOHANN wALx, or VIENNA, AUSTRIA.

IMPROVEMENT IN MOTORS FOR SlGNAL-ALARMS.

v Specification forming part of Letters PatentNo. 128,683, dated July 2, 1872.

I, JOHANN WALK, of the Austrian Escompte Company, of Vienna, in the Empire of Austria, have invented a new and useful Improvement in Motors for Signal-Alarms, of which the following is a specification:

My invention relates to that class of signalalarms operated by aerostatic means g and my 4said invention consists, rst, in a novel arrangement and combination of devices to effect the operation of the alarm through the medium of compressed air, and to interrupt Second, in means for when rareiied air is used. Third, the combination of devices to prevent the operation of "the alarm when used with either compressed or rareted air, when desired, for legitimate operation or removal of the object protected. Fourth, in the combination of devices to effeet a connection between the air-chambers ot' the body andthose of the door or doors of the safe or object protected.

ln the drawing, Figures l and 3 show my improved motor asapplied to a safe and used with rareed air. y Fig. 2 shows an indicating attachment to the same. Figs. 4 and 5-are modications of air-tight iiexible connections between the air-chambers. Fig. 6 is a modiiication of the device shown in Fig. 3; and Fig. 7 shows my apparatus as used with compressed air.

My invention can be applied in two wayseither by compressed air or by rareed air.

I will first illustrate the 'former method by describing its application to a safe, as shown on Sheet 3, Fig. 7, of the drawing.

The safe is iitted on its inside with additional walls, so that an air-space, c,is around its entire interior. The outside door is provided with a similar air-space, which is connected to the air-space of the safe-body by means offan India-rubber pipe, m, and the hollow axis b, as shown in Fig. 4, where n3 is the door, having a hollow axis, b, andturning upon its pivot n4, and is connected to the air-space in the side walls of the safe by a flexible tube, m, which unites mrecesses n2, so arranged that a column or mass of quiclrsilver standing level inthese recesses will also ll the tube and thus shutoii'` air connection; but it the equilibrium of this quicksilver is disturbed by any cause from either recess, the pressure on the quicksilver will drive the same into that airspace in either door or safe which has been meddled with, and so change the pressure in the sound air-space, thereby operating the alarm, as will be hereinafter more fully described. In Fig. 5 this connection is shown continuous, the air-spaces in the door and safe not being shut oft' from eachother, the quicksilver being situated around the tube in ,a space formed by a larger surrounding-tube, o, the inner tube being kept expanded by means of a wire coil, o. In this case unauthorized meddling with the safe will cause the quicksilver to ow into the inner tube by overflowing the space around the same, and thus interrupt communication between the air-spaces, and thus cause a cha ge of pressure to operate the alarm.

The perpendicular capillary transp arent tube c carries the bulbs d d1, the distance of which from each other corresponds with the greatest possible difference of the amount of pressure on the air in the air-space a, caused by the change in the temperature in the outer atmospherc. On the `surface of the quicksilver in the cylinder f the piston c iioats, the rod e1 of which acts uponthe lever u, through which the signal apparatus, inclosed in an air-tight box, k1, is operated.

The cylinder f and the bulbs d d? are secured on the inside of the safe so as to be visible when the door is opened and the signal-apparatus box k1 is secured on the outside or top of the safe, or any lother suitable place connecting with the air-space by means of the tube al, and with the cylinder f by means of tube f1, which surrounds the rod el. Air is then pumped into the air-space a through an opening, la, in the signal-apparatus box k1, which forces the piston c downwardly until the quicksilver in tube c has reached a height corresponding with the outside temperature, the upper bulb d communicating with the air in the safe by means of a small open tube, d2. The distance between the bulbs d dland the sensitiveness of the apparatus depends upon the height of the column ofquicksilver in tube c. If, by any damage that may be done to either the inner or outer wall of the safe, the pressure of the air in the air-space, either by having formed an opening through which to escape or by. being expanded through heat of -tire,

is changed beyond the limits which rcould be produced by 'a natural change ofthe outer atmosphere, the equilibrium ofthe quicksilver is destroyed, and it will, if the compressed air is released, rise in cylinder j' or, if the air is forcibly compressed the piston e will press the quicksilver down in the cylinder and cause it to rise through tube c1 into bulb d1, in either case affecting the rod e1, through which the signal apparatus is operated. A like result is eifected by the unauthorized removal of a safe 5 for it' the same be tipped over so much as to cause .the quicksilver to rise in tube c, the

pressure of the air in air-space a Vwill force the piston e down, thus operating the signal It' itis desi-red to move a safe u ,through rod el.. A without settin g off the alarm, a thumb-screw,

r, in bulb d, may be turned down so as to close the tube c and shut it off from the atmosphere, when the safe can be moved and tipped without disturbing the equilibrium of the quicksilver; or, the quicksilver may be entirely removed from the cylinder f, after securing the bell-crank lever g, which holds the hammer through which the alarm is set off, by means of turning the lever p so as to seize over and hold the lever g, and securing the lever p by means of a thumb-screw, p-all these parts being on the inside of the safe and signal-apparatus box, so that they can be operated only from the inside of the safe.` The removal of the quicksilver from thecylinder f is effected by removing the bulb d from the wall and bending it downward, which may be done by forming a part, s, of it of India rubber, so that all the quicksilver is by the pressure of the air forced and runs into bulb d, which is suf:

liciently large for thatpurpose, and by then closing the opening of said bulb by thumbscrew r, the tube d2 having, of course, been suitably closed before. It will be readily understood that any kind of alarm apparatus may be used, and arranged to be operated by the rising and falling of rod el. On Sheets l and 2 I have shown the construction of the apparatus when used with rareed air. In this case the air-spaces a are filled with bent wires c2 to prevent the collapse of the walls. In this case, also, the rod e1, Figs. 1 a-nd 3, carries at its lower end merely a plate, e2, surrounded by a exible air-tight bag, e3, and the cylinder f is not connected to or provided with bulbs. The surrounding tube f1 is connected with the air-space a by means of a iiexible tube, b2, while thewalls,`to strengthen them, may form separate air-chambers a, connected to each other by suitable air-tight flexible tubes b3, Figs. 3 and 4. In this case the air is pumped out from the air-chambers, so as to collapse the flexible bag e3. If any of the walls are injured and air admitted, its rush will expand this bag, forcing the quicksilver out of the cylinder through openin g l, and allowing the spring k2. to depress rod el, thus setting free the alarm. The power of spring k2. must be, of course, less than the weight of the atmosphere, exerted through the opening l up on the quicksilver :and .under sideof bag et and plate e?, elise the spring would operate the rod. In Fig. 6 is shown a method of operating the alarm by raising the rod e1 or its equivalent.1 In this case the bag ca is under the pilston, which latter sinks when the bag is collapsed by pumping out ofthe air, while, when air is admitted, the bag expands and raises the piston or oat e2. In Figs, 2, and 3 is a screw, l1, passing through air-tight bearings in the under side of the cylinder f, and which,

when the apparatus is put into operation, is

screwed out, so that its upper and inner end is flush with the bottom of cylinder f, as shown, and the screw l2, Fig. 3, which fits into opening l, is removed to allow the exertion ofthe weight of the atmosphere. In moving the safe the screw l2 is made to close the open-l ing tto prevent the overow of the quicksilver, and the screw Z1 is screwed up until its upper and inner end touches the bag c3 and plate e2, thus firmly holding the latter and preventing the spring k2 from forcing the rod el downwardly.'

Fig. 2 shows the attachment of indicator to illustrate the pressure of the atmosphere on the quicksilver. A glass tube, t, on-a metal scale, w, connects with the cylinder f by means of a tube, a?, and as the top of the tube e must be arranged in the safe or other article to which this invention is applied in such a manner that only an unauthorized pressure will drive the quicksilver, out of the tube e, thus a glance at the tube c will indicate the natural change of the atmosphere and the amount of its pressure.

In Figs. 1 and 3 the alarm is shown as pro-` duced by means of the descent of the hammer when released by the rod el; in Fig. 7 the hainmer is elevated for that purpose. In each case the hammer is operated by means. o f a spring, the rod el, by its upward or downward movement, releasingit. The hammer, on being re'- leased, comes into forcible contact with adetonatingV mass suitably arranged in the box k1, and connecting with an explosive alarm mass.

I am well aware that signalalarms4 have been operated by means of aerostatic changes, and this I do not claim ;fbut in all the devices heretofore used the protection afforded has been but partial, and a legitimate approach to or entrance into the object thus protected could be effected only by disconnecting by suitable means the alarm from said object to prevent the alarm from being set offri or the alarm is operate'd, whether the approach is legitimate or otherwise, which, for signaling at a distance, would not secure the object sought to be attained. In my invention only illegitimate approach to or entrance into the object protected willbe indicated, as by means of improved fiexiblaconnections the doors of 'a safe or the doors and windows of a house may be opened at any time Without operating the ala-rm; while, if they are properly locked and entrance is tried to be effected by working through them, the alarm is instantly set off by the change in the density of the air in the different chambers.

AHavingdescribed my invention,'I'jclaim-" f 1. The bulbsd d1, in combination Withlthe air-spacesmtubesc,c1,fandf1, the cylinder f, piston e, and `connecting-rod e1, as a means `for operating the alarm through the medium of compressed air, substantallyas described.

r 12. The Wirebracing `c2 in the air-chambers, las ameans of preventing collapse of the Walls of said air-chambers' when used with rarefied lair, substantially as described, and as shown in Figs. l and 3 of the drawing.

3.\Theco1nbination of the lever p, thumb- "screw p', valve r in bulb d, and llexible convnecting-izubegas a means of preventing the` Aoperation of the alarmwhen desired, and when `used with compressed air, substantially as de-l scribed, andshown in Fig. 7 of the drawing.

4. In combination with the 'connecting-rod el, plate e2, flexible bag e3, cylinder j, and inclosing-tube f1, I claim the thumb-screws Z1 and l as a means of preventing the operation of the alarm when desired, and lwhen used with rareed air, substantially as described, and shown in Fig. 8 of the drawing.

5. The combination of the air-spaces a, hollow axle b of door n3, recesses n2, and tube m filled with quiclcsilver, as a connection between the door and the body of the safe, substantially as described, and shown in Fig. 4 of the draw ing.

JOHANN WALK.

Witnesses: v

AUGUST ScHR ORDER, CARL F. MEYER.

Images