US1048942A - Horn or whistle. - Google Patents

Description

E. B. CHAPMAN.

HORN OR WHISTLE.

APPLICATION FILED 001. 23, 1911 1,048,942 Patented Dec. 31, 1912.

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' WITNESSES: INVENTOR i W 64 ww m i a /6Z% BY A TTORNEY cOLUMmA PLANouRAPH 60.. WASHINGTON. B4 C4 UNITED STATES PATENT OFFICE.

EVERETT B. CHAPMAN, 013 BOSTON, MASSACHUSETTS, ASSIGNOlR, T0 SOLOMON A. CAMPBELL, OF NEWTON, MASSACHUSETTS.

HORN OR WHISTLE.

T 0 all whom it may concern:

Be it known that I, EVERETT B. CHAPMAN, of Boston, in the county of Suffolk and State of Massachusetts, have invented certain new and useful Improvements in Horns or IVhist-les, of which the following is a full, clear, and exact description.

This invention relates to certain improvements in horns or whistles adapted to be operated at will by the proper control of gas as, for instance, the exhaust gas of an internal combustion engine.

My invention relates more particularly to signals of that character wherein there is employed a sound chamber supported by the exhaust conduit and having an opening across which the gas is permitted to flow during the operation of the signal.

One of the main objects of my invention is to insure the proper relationship of the sound chamber, its opening, the size of the gas delivery passage or slot and the angle of delivery of the gas. To secure this object I form a permanent slot for the gas at the proper position and in parts rigid with the sound chamber and provide means whereby at will the gas may be prevented from freely escaping from the gas conduit and the slot may be uncovered, opened or rendered accessible to the gas, so that the latter may blow through the slot and across the sound chamber opening to operate the signal.

Another object of my invention is to prevent the gas from blowing across the sound chamber opening when the signal is out of operation by protecting, covering or deflecting the gas away from the slot and providing an independent outlet for said gas.

A further object of my invention is to render the signal more compact and less liable to injury and capable of being secured in place where very little room is available by utilizing one or more tubes as the sound chamber and supporting these tubes closely adjacent to and parallel with the conduit.

A still further object of my invention is to so construct the signal that it may be readily attached to a conduit intermediate the ends of the latter without necessitating the removal of the conduit or the employment of special machinery other than means for cutting a hole in the side of the conduit.

Imay secure these objects in various ways,

Specification of Letters Patent.

Application filed October 23, 1911.

Patented Dec. 31,1912.

Serial No. 656,094.

but I preferably employ one of the forms shown in the accompanying drawings forming a part of this specification and to which reference is to be had.

In these drawings similar reference characters indicate corresponding parts in the different views.

Figure 1 is a top plan View of a signal constructed in accordance with my invention and applied to the conduit intermediate the ends of the latter; Fig. 2 is a central longitudinal section on the line 22 of Fig. 1; Fig. 3 is an end View of the device shown in Fig. l; and Fig. 4 is a face view of the valve plate employed within the conduit.

In the form illustrated I utilize a conduit 10, which may be a section of the exhaust pipe between the engine and muflier or in the rear of the muffler or at the eX- treme rear end of the conduit. This conduit has a hole 11 cut in the side thereof and over this hole is secured a casing or plate 12 held in place in any suitable manner.

'As shown, the casing, plate or cover has outwardly extending flanges 13 at diametrically opposite sides of the conduit and adapted to be clamped to two curved bars 14:, as is clearly shown in Fig. 3. The plate, casing or cover member 12 has a sound chamber rigidly secured thereto and in the form illustrated in the drawing, this sound chamber includes two tubes 15 and 16 lying side by side parallel to each other and to the conduit, and each having a closed end and an open end. Closely adjacent to the open end the member 12 has a slot 17 through which the gas may escape from the interior of the conduit in such a direction as to cross the opening and produce the sound.

The member 12 serves to support a movable device for closing or covering this slot and normally preventing the escape of gas. This device in the form illustrated operates substantially as a turning plug and includes a half round bar 18 j ournaled in the casing 12 directly below the slot 17 so that when it is rotated, it closes the slot in the same manner as an ordinary turning plug. This valve or turning plug carries a plate or wing 19 upon its lower edge, the said plate or wing being of such shape and so placed that when the turning plug is moved to uncover the slot 17, the plate will swing across the conduit and substantially close the latter and prevent the gas from passing along said conduit beyond said slot. I have illustrated the plate or valve 19 as being secured to the valve member 18 by a suitable screw, but it is, of course, evident that it might be secured in any other suit able manner or that the two might be formed integral. I have not illustrated any means for rotating the member 18, as such means constitutes no portion of my present invention. Any lever, gear, spring or other device may be employed for oscillating the member 18 and causing it and the valve plate 19 to assume either the position shown in Fig. 2 or a position in which the member 18 closes the slot 17, and the member 19 lies closely adjacent the wall of the casing or cover member 18. It will be noted that this device may be applied to any conduit without removing the latter and without requiring any other tools than means for sawing or cutting the opening 11. As the sound chamber does not project outwardly from the conduit but to only a slight extent, it is evident that the signal may be secured in place where very little room is available, and as the sound chamber engages with the casing or cover member 12 for a considerable distance, itis evident that these two may be very rigidly secured together. Furthermore, it will be noted that in case the high pressure of the gas or the presence of soot or dirt in the conduit prevents the closure 19 from moving into perfect contact with the lower edge of the conduit, as shown in Fig. 2, still the slot 17 may be fully uncovered and the gas delivered across the opening in the proper direction. This is due to the fact that the slot 17 has a permanent relationship to the sound tubes and is uncovered before the closure 19 reaches its final position.

Having thus described my invention what I claim as new and desire to secure by Letters Patent is:

An alarm or signal including a conduit having a main outlet and a separate auxiliary outlet in the form of a slot, a sound chamber rigid with said conduit and having an opening adjacent to said slot and a member having a pivot portion adjacent to the side of said conduit at said slot and normally closing the latter and a leaf portion carried thereby and movable to substantially close said main outlet upon the rotation of said pivot portion to uncover said slot.

In testimony whereof I have signed my name to this specification in the presence of two subscribing Witnesses.

EVERETT B. CHAPMAN.

Witnesses:

JAMES W.. Fosrnn, V. I. GLYNN.

Copies of this patent may he obtained for five cents each, by addressing the Commissioner of Patents. Washington, D. C.

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