US409088A - Alarm - Google Patents

Description

(No Model.)

Patented Aug. 13, 1889. @l

L .715d im IIlllllllllll l! Illllllllllilf1 2 Sheets-Sheet 2.

(No Model.)

G. M. WILLIAMS.

ALARM.

Patente-d Aug. 13, 1889.

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UNITED STATES PATENT OFFICE.

GXVILYM M, WILLIAMS, OF VILKES-BARR, PENNSYLVANIA.

ALARM.

SPECIFICATION forming part of Letters Patent No. 409,088, dated August 13, 1889.

Application tiled February 4, 1889.A Serial No. 298,624. (N0 model.)

.To all whom it may concern:

Be it known that I, GWTLYM lvLWiLLIAMs, a citizen of theUnited States, residing at Vilkes- Barr, in the county of Luzerne and State of Pennsylvania, have in vented certain new and useful Improvements in an Electric Alarm Attachment for Pressure-Gages, of which the following is a specification.

This invention relates to an electric alarm attachment for pressure gages, and is designed especially for use upon gages of that class embodying an oscillating or partiallyrotatable indicator.

The object of the invention is to provide a device of this character adapted to sound an alarm when the pressure passes beyond a desired limit, whether it be greater or less than said limit.

A further object of the invention is to provide means for adjusting the device to regulate the points at which the alarm may be sounded.

A further object of the invention is to provide an electric alarm attachment of this character adapted to be thrown in or out of operation, as desired.

A further object of the invention is to provide a simple and improved electric alarm of this class which will possess advantages in point of inexpensiveness, durability, and general eiiiciency.

In the drawings, Figure l is a perspective view of a pressure-gage, showing my electric alarm attachment applied thereto. Fig. 2 is a side elevation illustrating the circuit-closer thrown out of operation. Fig. 3 is a top or plan view. Figs. 4t and 5 are detail sectional views at right angles to each other, taken through the circuit-closer and adjacent parts of the gage, the latter view illustrating the manner of insulating the circuit-closer. Fig. 6 is a detail perspective view of the circuitcloser. Fig. 7 is a detail perspective view of a modification.

Corresponding parts in the figures are denoted by the same letters of reference.

The present invention is herein shown as applied to my newly-invented pressure-gage, for which application was filed November l5, 1888, Serial No. 290,891. The latter comprises, brieiiy, a casing A, provided with a pressure-actuated diaphragm, (not shown,) and a casing B, mounted upon the top a ofthe casing A. A shaft O is mounted in the casing B and projects therefrom, said shaft being connected with the diaphragm by suitable mechanism, and is oscillated by the movement of the diaphragm. Upon the outer end of the shaft is mounted an indicator c, or

a recording-arm, (illustrated in Fig. 7,) adapted to carry a pen or pencil for recording the pressure and time upon a chart provided therefor,

Upon the top of the casing is secured my improved circuit-closer D, a plate E, of hard rubber or other insulating material, being interposed betweenthe two. This circuit-closer comprises a plate d, preferably secured to the gage by screws passedthrough perforations d d provided therefor in said plate. The screws are insulated by blocks d2 cl2, also preferably of hard rubber and having reduced cylindrical portions, which proj ect through the perforations d', said blocks being each provided with perforations through which the securin g-screws pass. Complete insulation between the circuit-closer and gage is thus secured.

To the rigid plate d is hinged a plate F, which, when the alarm mechanism is in use, rests upon the plate E, the latter being of sufficient size to accomplish this purpose. The plate F is provided at its ends with correspondin g upwardly-proj ecting lu gs f f, having horizontal oppositely-disposed screw-threaded perforations f f for the reception of adjustable opposing thumb-screws G G, the inner opposing ends of which arey preferably pointed, as shown.

H designates a plate, preferably formed of spring metal,which projects downwardly from the indicator c, or from the shaft C, and between the opposing ends of the screws G G. This plate is carried by the shaft in its movement, and has free play within the limit allowed by the adjusting-screws. By reason of its spring action,when the plate comes in contact with one of the screws, it yields to further pressure in that direction, but remains in contact with the screw.

Upon the gage and plate are disposed binding-posts I I, of any suitable construction, which are connected by wires in the usual manner with a battery J and with a bell K or IOO fs llegase other alarm 111eel1a11isn1. ln addition to the hell K, I prefer to employ one or inore hells L, situated at desired points and eonneeted with the poles of the battery h vhranehwires. By the employment of this additional alarm ineehz'tnisnn should the eireuit through any ol. the bells l1eeo111e broken the remaining ones will sound an alarni.

The operationand advantage'sof in v invention willhe readilT understood hy those sli illed in the art to which it appertains. 'lhe degree of pressure ahove or below the 11or111al oraverage pressure atwhieh it is desired tohavethe alarm sounded is regulated h5' the adj ustinent o' the tl1u1nl1-se1'ews. 'W hen the pressure l1eeo111es greater or less than the liinit to whieh the serews have heen adjusted, the plaie ll Goines in eontaet with one of the serewsavhieh forms a Complete eireuit through the gage and eireuit eloser, and an alarin will he sounded until the pressure heeoines greater or less, as the ease ma)Y he, and the eontaetof said plate and the serew broken.

lVhen an operation of the gage is desired independentof the alarni, theplate lf isthrown hack, removing the Circuit-closer t'ron1 anjvY possible Contact with the plate li.

l elaiin 1113'v inventionm l. ln an eleetrie alarm ii'or pressure-gages, the Combination,with a rigid plate, ot'a plate hinged thereto, provided with upwardly-projeeting Corresponding lugs disposed at eaeh` end thereof, and having opposing eo11iaet points, suhstant.iall \v as and t'or the purpose Set forth.

In an eleetrie alarn1 'or pressure-gages, the Combination, with a rigid plate, olf two eorrespo 11 ding lugs pivotal ly eonneetod therewith and provided with opposing arfljustahle screws Vforming Contact-points, substantially as and for the purpose set forth.

El. The oenihination, with a pressure-gage provided with 'an oscillating Yindieatorsshalft and a plate projecting downwardly troni the latter, ot an insulated eireuit-eleser eo1nprising a rigid plate, lugs pivotall)Y eonneeted therewith, 1 1rojeeting at each side the downwardly-preieeti11g plate and provided with cfontaot-lwints tor engage111e11t hy the latter, said ei reuit-eloser hein g adapted to be thrown '111 or out oli' operation, and llattery and alarm mechanism eonneeted hy wires with the shaft and eireuit-eloser, suhstal1tiallgyY as sei lj'orth.

l. The Combination, wilh a pressure-gage lnfovided with an oscillating indif'ator-shai't and a plate projeeting iflmvnu'ardlv from the latter, ot` an insulated eireuit-eh1ser eonipris ing` a rigid plate and a plate hinged thereto provided with two eorrespomli11g lugs projecting at eaeh side the dowuwaidly-projem ing plate, o] 1]r1osing adjustable serews pro vided through thelugs,a1nlfl1atteryandalarin nieehanisin Connected by wires with 1l1e shatl and eirei'iit-eloser, suhsiantially as set t'orth.

ln testimony whereotl'ailix inv signature in presence ot two witnesses.

W'itn esses:

'l1 Il.. Satvnow, li. W. 11111111111.

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