US354884A - Alarm - Google Patents

Description

(No Model.) 2 sheds-sheet.. 1.

' J. R. BRANDENY.

ALARM. 310.354,884. Patented Dec. 28, 1886.

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ALARM. NQl 354,884. Patented Dc. 28.1886.

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JEFFRIES ROBERT BRANDEN, OF DETRGIT, MICHIGAN.

ALARM.

SPECIFICATION forming part of Letters Pat-ent No. 354,884, dated December 28, 1886.

Application filed August 18, l885.. Serial No. 174,7l 7. (No model.)

To all whom it may concern;

Be it known that I, J murales ROBERT BRAN- DEN, of Detroit, in the county of Wayne and State of Michigan, have invented certain new and useful Improvements in Alarms; and I do hereby declare that the following is a full, clear, and exact description of the invention, which willenable others skilledin the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters of'reference marked thereon, which form part of this specification.

The object of this invention is to provide novel and efficient mechanism forsounding an alarm in case of burglary or for calling the po lice or outside aid.

In the drawings, Figure l 'is a side elevation of the apparatus. Fig. 2 is a plan View of same, partlyin section. Fig. 3 is a side elevation in which the cylinder is replaced by a bellows. Fig. 4 is a plan view of the device as shown in Fig. 3, and Fig. 5 is adetail view of .certain parts.

In Figs. l and 2 is represented an air-pump consisting of an air-cylinder, a, an airvalve chest, A, provided wit-h the valve-ports D D E E, which alternately receive and discharge air, as will be understood from the explanation of the construction and operation hereinafter, and piston b. (See partial section, Fig. 2.) The latter receivesareciproeating motion from thepiston c and the crank d. This crank is actuated by a clock-work mechanism composed of the shafts e e' e2, the gear-wheels f f f 2 f3, the bearings g g g2 g3 gt, and the drum h, upon which is wound a string, t', having attached to it a weight, k, which may be'conveniently replaced by a spring causing the same action. In one side of the drum h are suitably fastened pins Z, for the purpose hereinafter stated.

M is an air chamber or accumulator, connected with the air-valve chest A by means of a pipe, N. The air-cha1nber M is also provided with a valve mechanism, o, (shown also in detail, Fig. 5,) and of which mention will be made hereinafter. p is a pipe leading from the valve to the whistle q.

In Figs. 3 and 4 all parts are the same as in Figs. 1 and 2,.'cxcepting that the air-pump consists of the bellows r, the guides s, and the connecting-rod t, instead of the cylinder, piston, and piston-rod, as heretofore described.

Fig. 5 represents the valve mechanism illustrated on a larger scale.

4 It consists of al plate, u, which closes or opens the opening 'v When the anchor Y is pulled oftlfrom the pins L L by the string z, the clock-work mechanism is set in motion by the weight k, (or by a spring, as the case may be,) causing the crank d to rotate and impart to the piston a reciprocating motion, the cylinder meanwhile oscillating in the bearings g5 g, in which it is trunnioned, in front of the air-valve chest A, drawing lair in through the ports D D and discharging it through the portsE E alternately, and the connecting-pipe N into the air charnber or accumulator M, causing therein a suitable pressure of air, which is forced through opening o and the hose or pipe p into the whistle q, causing itto sound. The opening and closing of the opening o, which is effected by plate u, the pivoted lever w, the spring x, and the pins l on the revolving drum 7L,.will cause the whistle to sound successive blasts, conforming to the usual police-calls.

The strings z c may be attached to doors or' windows of premises, and thus be made to act automatically, or may be hung in any convenient place to be pulled by the hand. The string z is for the purpose of stopping the mechanism when the action of the apparatus has lasted long enough. The same result is vbrought about by the bellows o', Figs. 3 and 4, in place of the cylinder c and the piston bin Figs. l and 2, the one end of the vbellows being stationary, while the other receivesa reciprocating motion from the crank d, substantially the same as the piston b in Figs. l and 2, and the airis drawn into the bellows through the valve G and forced into the'air chamber or accumulator through the valve G and the pipe N. The piston b andthe piston-rod cin Figs. 1 and 2 are not packed in tightly, but allow a tritling leakage, for the reason that it causes no friction, and at the same time serves an- ICO other purpose, viz: Vhen the opening'fv is` closed the action of the air-tightvpiston and piston-rod would eventually cause so much pressure in the accumulator that it could not be overcome by the weight k, (or its substitute-fa spring,) and would thus stop the entire mechanism,while a slightlydeaking piston and piston-rod would overcome this defect. For the same reason the valve G in Fig. 3 in the bellows r is allowed a trilling leakage.

What I claim as my invention is- 1. An alarm and police call consisting of the accumulator M, provided with a flexible tube having a whistle attached thereto, and an opening, v, the air-compressing cylinder, the piston of which is connected to clock mechanism having drum h, provided with side pins, l, in combination with the pivoted lever w and slide-valve u, as set forth.

2. The combination, with cylinder a, trunnoned and provided with alternate receiving and discharging air-ports D D E E', pipe N, accumulator M, having openng'v, and whistle q, slide-valve u, lever w, and` piston b, of a motor having a drum provided with lever-operating side pins, and a crank-shaft geared with the drum for reciprocating the piston, as set forth.

3. In combination, a motor having a. drum provided with'pins -l l, Wheel f', having pins L L, a pivoted bell-crank stopping-lever, Y, having cords z z secured to its outer ends, and a projecting hook, a', pivoted lever w, and valve u,looselylconnected thereto, the crank d, piston-rod c, havingpiston-head b, the pipeconnection N, the accumulator M, and the flexible pipe h, having whistle q, substantially as set forth.

In testimony that I claim the foregoing as my own I ax my signature in presence of two witnesses.

JEFFRIES ROBERT BRANDEN.'

Witnesses:

GEO. HARGREAVES, FRED. GUENTHER.

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