US1083299A - Fluid-actuated alarm. - Google Patents

Description

G. R. W. ROBERTS & H. H. SEBLY.

' FLUID AGTUATED ALARM.

APPLICATION FILED FEB. 18, 1913.

1,083,299, Patented'Jan. 6, 1914.

WITNESSES: IN VE/V T085 A TTOR/VEY COLUMBIA PLANOGRAPH CO.,WASHINUTON. n. c.

To all whom it may concern Be it known that we, GEORG R. W. ROB- nR'rs and HARRY HooPEs SEELY, citizens of the United States, residing at Alameda, in

the county of Alameda and State of California, have invented certain new and useful Improvements in Fluid-Actuated Alarms, of which the following is a specification.

, Our invention relates to that class of fluid-actuated alarms in which the delivery of the fluid, both as to time and duration, is under the immediate control of the operator, thereby adapting them for use on street railway carsand electric trains.

Our present invention more particularly relates to that fluid-actuated gongfor which we have been granted Letters Patent No. 1,047,706, dated December 17 1912. In that device the actuatin flui through a single nozzle and is controlled" by a single valve which is, in itsbest form, operated by a foot-pedal. This results in a more or less leisurely initiation of the alarm and its uniform continuance.

The object of our present invention is to provide for a quick and peremptory start, anda subsequent continuance of gentler quality. The continuance may be either "uniform, or varied in intensity to produce I a pulsating alarm,with rising and falling inflection, thereby adding'to the effect and value of the notice given.

A further object of our invention is to economize the fluid necessary to operate the alarm, V

To these ends our invention consists inthe novel fluid-actuated alarm and the novel construction of its controls, which we shall companying drawings, in which- Figure l is a front elevation of our device, broken and partly in section. Fig. 2 is a side view of the same in elevation.

l is a portion of the supporting structure,

which may be considered as the platform of a car.

2 is a bracket bolted to the platform, said bracket carrying the device.

The sound producing portion of the device may be of any suitable nature. For illustration we here show it as comprising a gong 3, a striker 4, a shaft 5 carrying the striker, and an impact wheel 6 on the shaft.

7 is the primary fluid conduit, which at one terminal communicates with the primary nozzle 8, the tip of which is in proper now fully describe by reference to the ac- Specification of Letters Patent.

Application filed February 18, 1913.

is delivered" the stem UNITED STATES EATENT OFFICE.

GEORGE E. W. ROBERTS AND HARRY HOOIPES SEELY, 0F ALAMEDA, CALIFORNIA.

FLUID-ACTUATED ALARM.

Patented Jan. 6, 1914.. Serial No. 749,166.

relation to the impact wheel 6 to drive said wheel by the impingement thereon of the delivered fluid; and at its otheinterminal said primary conduit communicates with the inlet chamber 9, with which the inlet pipe 10 from the fluid-source communicates. The communication between the inlet chamber 9 and the primary conduit 7 is controlled by a valve 11 within said chamber, said valve being normally held toits seat by a spring 12. The valve 11 has an uprising stem 13, the top of. which is best provided with a cap 14, said cap being in contact with the lower end of a stem 15 of a foot pedal 16 mounted in the carplatform 1.

The communication of the primary conduit L with th primary nozzle 8 is controlled by an automatic pressurevalve 17, 18 of which is carried by a piston 19, slidable in a cylinder 20. The piston is exposed at its front end to the primary conduit 7 and is held forward, to keep the valve 17 normally closed, by a sprin'g 21. In the upper wall of the cylinder is made a passage 22 which leads from the primary conduit 7 in advance of the valve 17 back into a chainber 23 in the rear end of the cylinder. The inner end of the piston 19 is exposed to said chamber. In the lower wall of the cylinder is made a passage 24 which leads from the cylinder bore in the path of movement of the piston, forward to and communicates with the secondary nozzle 25, also adapted to deliver the fiuid upon the impact wheel 6. It will be seen that the passage 22, chamber 23 and passage 24 form a secondary fluid-conduit from the primary conduit to the secondary nozzle 25. p

The operation is as follows: When the pedal 16 is pressed and held down, the valve 11 is opened, and the actuating fluidpasses into the primary conduit 7 with full volume and pressure. The immediate effect of this pressure, acting upon the exposed forward end of the piston 19 is to force said piston back, thereby withdrawing the valve 17 from its seat and opening the communication to the primary nozzle 8. Tith this full volume of fluid the impact wheel is given a quick start resulting in a peremptory initial warning produced by the striker 4 on the gong 3. It will be noted that this backward movement of the piston 19 causes said piston to cover and close the lower passage 24 opening from the cylinder bore to the secondary nozzle 25. A part of the fluid from the main conduit 1 through the upper passage 22 of the cylinder passes into the cylinder chamber 23 and as soon as the pressure in this chamber accumulates to a point where the pressure in front and behind the piston 19 is equal,"

the spring 21 will move said piston forward with the result of closing the valve 17 on its seat. This cuts olf the fluid pressure through the primary nozzle 8, and thereupon the piston by its forward movement having opened the lower passage 24, the fluid will flow from the primary conduit 7 through the secondary conduit formed by the" upper passage 22, cylinder chamber 23, the lower passage 24, to the secondary nozzle 25, and thereafter the alarm will be operated by this nozzle. This last operation may be uniformly continuous and of gentler quality, or, if desired, the operator may by successive footpressures and releases on the pedal 16 cause'airapid succession of the whole operation both primary and secondary, thereby producing a pulsating alarm with increased and diminished cadence. "When the operator finally releases the pedal, the parts return to normal quiescence. It will readily be seen 'thatby this arrangement; there may be great saving in the amount of fluid necessary to operate the alarm.

I/Ve claim 1. In a fluid-actuated alarm, the combi nation of an alarm device operated by fluid pressure; a primary fluid connection to operate said alarm device; a valve for controlling said primary fluid connection at the'will of the operator; a secondary fluid connection to operate said alarmdevice, said secondary fluid connection communicating with the primary fluid connection at a point between the valve and the outlet of said latter connection; and pressure-operated means disposed to simultaneously close the secondary connection and open the primary connection and vice versa.

2. In a fluid-actuated alarm, the combination of an alarm device operated by fluid pressure; a primary fluid-nozzle and a primary fluid-connection serving said nozzle to initiate the operation of said alarm device; a valve for controlling said primary connection; means under the control of the operator for operating said valve; a secondary fluid-nozzle and a secondary fluid con nection serving said nozzle and communieating with the primary fluid connection between its nozzle and valve for continuing Copies of this patent may be obtained for flowing the operation of said alarm device; and pressure-operated means disposed to simultaneously close the secondary connection and open the primary connection and vice versa.

3. In a fluid-actuated alarm, the combination of an alarm device operated by fluid pressure; a primary fluid-connection to initiate the operation of said alarm device; a valve for controlling said primary connection; means under the control ofthe operator for operating said valve; a secondary fluid connection communicating with the primary connection between its valve and outlet for continuing the operation of said alarm device; a second Valve cont-rolling the primary connection beyond the communication of the two fluid connections; and a spring controlled piston carrying. said second valve, exposed at opposite ends to the primary and secondary fluid-connections said piston being disposed to simultaneously close the secondary connection and open the second valve of the primary connection and vice versa. V

4. In afluid-actuated alarm, the combination of an alarm device operated by fluid pressure; a primary fluid no-zzle to initiate the operation of said alarm device; a primary fluid-connection from a fluid source to said primary nozzle; a valve under the chntrol of the operator to control the admission of the fluid to said primary connection; a secondary fluid-nozzlefto continue the operation of saidalarm device; a secondary fluid -connectiorr communicating with the primary fluid-connection between 95 its nozzle and valve and with the secondary GEORGE It. W; ROBERTS. HARRY I-IOOPES SEELY.

\Vitnesses WM. F. Boorrr,

five cents each, by addressing the Washington, D. G.

D. B. RICHARDS.

Commissioner of Patents fluid-nozzle; asecond valve controlling them;

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