US316898A

US316898A - Chimney cap or ventilator

Info

Publication number: US316898A
Authority: US
Publication date: 1885-04-28
Anticipated expiration: 1902-04-28

Description

(No Model;) I M. W. KIDDER.

CHIMNEY GAP OR'VENTILATOR. No. 316,898. Patented Apr.'28, 1885 UNITED STATES PATENT OFFICE.

MOSES W. KIDDER, OF LINCOLN, ASSIGNOR OF ONE-HA LFTO JOHN S. RICE, OF CAMBRIDGE, MASSACHUSETTS.

CHIMNEY CAP OR VENTILATOR.

SPECIFICATION forming part of Letters Patent No. 316,898, dated April 28, 1885.

Application filed January 10, 1885. (No model.)

To all whom it may concern:

' Be it known that I Moses W. KIDDER, of Lincoln, in the county of Middlesex and State of Massachusetts, have invented certain Improvements in Chimney Caps or Ventilators,

of which the following is a specification.

This invention has for its object to provide a chimney cap or ventilator of strong, simple, cheap, and durable construction; and to this end it consists in a tube composed of a piece of sheet metal having two or more series of longitudinal slots, each formed by cutting a longitudinal slit and two transverse slits at the ends thereof, and bending the metal outwardly to widen the longitudinal slit and convert it into a slot or aperture for the passage of air, the uncut portions of the tube between the series. of apertures giving strength to the construction, as I will now proceed to describe.

Of the accompanying drawings, forming a part of this specification, Figure 1 represents a side elevation of a chimney cap or ventilator embodying my invention. Fig. 2 represents a section on line 00 00, Fig. 1. Fig. 3 represents a side view of a portion of the sheet from which the ventilator is formed.

The same letters of reference indicate the same parts in all the figures.

In the drawings, or represents my improved ventilator, which is composed of a sheet of metal bent into a tube and provided with a cap, I), at its upper end, and a suitable base or flange at its lower end to be inserted between two courses of bricks in a chimney.

c c 0 represent the orifices in the ventilator through which air, smoke, (to, escape from the ventilator at the one side and enter at the other side. These orifices are formed in two or more peripheral series, and each orifice is formed by cutting a longitudinal slit, 2, and two transverse slits, 3 3, at the ends thereof, as shown in Fig. 3, and bending outwardly the wings made by said slits, as shown in Figs. 1 and2.

Between each series of apertures and the next an uncut portion of the tube forms a continuous band around the tube, connecting the slitted portions above and below it, and giving strength andstifl'ness to the tube. The combined area of the orifices 0 should be equal to or somewhat greater than that of the crosssection of the tube.

By dividing the orifices into series separated by uncut portions of the tube, as above described, I am enabled to obtain sufiicient openings for the entrance of air and the escape of air, smoke, &c.,without weakening the tube.

I do not limit myself to forming the tube from a single piece or sheet of metal, as the intervening bands between the series of orifices may be in separate pieces, riveted or otherwise secured to plates which are bent to form the wings at the sides of the orifices.

1 am aware of Patent No. 9,375, and do notclaim anything shown therein.

,1 claim-- 1. A chimney cap or ventilator composed of a sheet-metal tube, having orifices a, each formed by cutting a longitudinal slit and two transverse slits, said orifices being arranged in two or more series separated by uncut portions of the tube, as set forth.

2. A chimney cap or ventilator composed of a tube having two or more series of orifices, c c, and an intervening strengthening-band between said series, extending continuously aronnd the tube, as set forth.

In testimony whereof I have signed my name to this specification,in the presence of two subscribing witnesses, this 5th day of January,

Witnesses: MOSES W. KIDDER.

G. F. Bnown, R. J. PowERs.