US743997A - Signal-lamp. - Google Patents

Description

No. 743,991. PATBNTED Nov. 1o, 190s.

- F. K. WRIGHT. SIGNAL LAMP.

APPLICATION FILED AUG. 23, 1901'. N0 MODEL I fur: Norms PETERS co` momumo. wAsnmaToN, n, c.

. UNITED STATES Patented November 10, 19S.

FREDERICK K. WRIGHT, OF SYRACUSE, NEW YORK.

SIG NAL-LAM P.

SPECIFICATION forming part of Letters Patent No. 743,997, dated November 10, 1903.

Y Application filed August 23, 1901. SerialNo. 72,991. (No model.)

a lower part connected by a horizontal joint which intersects the lens-openings in the side et the body about in line with the center of said openings.

The object of my invention is to provide a lamp of this kind which is very strong and durable and which is at the same time simple in construction and can be produced at comparatively small cost.

In the accompanying drawings, Figure l is a side elevation of my improved signal-lamp. Fig. 2 is a vertical section of the body of the lamp on an enlarged scale. Fig. 3 is a horizontal section in line 3 3, Fig. 2. Fig. 4 is a vertical section in line 4 4, Fig. 3. Fig. 5 is a sectional perspective view showing a blank of sheet-steel for one of the halves of the body stamped to semispherical form. Fig. 6 is a perspective view showing the lower half of the body completed. Fig. 7 is aA front elevation of one of the circular frames which are secured in the side openings of the body.

Like letters of reference'refer to like parts in the several figures.

The lamp consists, generally stated, of a body A, approximately spherical iu form, a top or dome B, which is secured upon the body, and a base C, which receives the oil pot and burner andnwhich is secured to the lower end of the body.

The bodyA consistsof upper and lower semispherical halves A A2, each'ot which is stamped of a single blank of sheetsteel. These halves are connected by a horizontal equatorial joint, which extends around the large part of the body. This joint is preferably a lap-joint, one of the halves-in the drawings the lower halfbeing provided with an offset or shouldered marginal portion d, against which the marginal portion ct of the other half dts closely, Figs. 2, 3, and 4. The

overlapping portions of the halves are secured together by rivets e or other suitable fastenings. The overlapping or joined portions of the two semispherical parts of the body lie-substantially in the spherical curvature of the body and do not project laterally from the body, so that the two semispherical parts when secured together form a body of spherical Aor approximately spherical form having no laterally-projecting portions at the joint, as indicated in Fig. 4.

The lam p-body is provided in its sides with circular openings f, formed partly in the upper and partly in the lowerI half of the body, the joint intersecting the openings about in line with the centers thereof. Three or four of these openings are usually formed in the body, one for inserting and removing the oil pot and burner and the rest for the reception of the lenses. The opening for inserting and removing the oil pot and burner is closed by a hinged door G, Fig. l. H represents circular frames which are secured in these openings for receiving the lenses or the door. Each of these frames is continuous and is secured in the opening by swaging or bending the inner portion h of the frame against the inner side of the body, While the outer portion h' bears against the outer side of the A body. The outer portion h dares outwardly and receives the lens I. (Indicated in dotted lines in Fig. 2.) The lens is clamped in the annular frame by the usual clamping-ring t, applied to the outer side of the frame, as shown on the left-hand side of Fig. l. When a larger leus is required, a detachable extension-frame .I is secured in the frame I by the usual clamping-rin g 1I, and the lens is clamped in said extension-frame by a clamping-ring t", as shown on the right-hand side of Figs. 2

IOO

assembled, and the body is therefore prodies until the blank has assumed the form o f a flanged bowl M, having adepressed bottom m, as shown in Fig. 5. The top flange m' of this blank is then removed, the bottom is cut out to form the inwardly-projecting flange 7.92 or l', the halves of the side openings are cut in the semispherical portion of the blank, the marginal or end portions of the metal between the side openings are rolled to form the shouldered portions d of the joint if the blank is designed for the offset half of the body, and the holes are punched, whereby the half of the body is completed. The two halves are then secured together, the annular frames are inserted into the side openings and se` cured therein, and the dome and base are nally secured, respectively, to the collars 7c and Z.

My improved lantern-body is very simple in construction and exceedingly strong and durable. It is produced with comparatively little Waste of material, the parts are quickly duced at comparatively small cost. The spherical body has no projecting flanges at the joint, and the annular frames for the lenses and for the door are secured directly in the openings of the body. This renders the lamp very compact and attractive in appearance, permits the drawing of the blank y of sheet metal to the desired form by but few operations, and also permits the same body to be used for lenses of different diameters, as the openings in the body can be made of i wager a diameter which is suitable to receive a lensframe for the smallest lens, and the frame can be enlarged for a larger lens by the addition of an extension-frame, which flares outwardly like the lens-frame to which it is secured for properly illuminating the lens.

I claim as my inventionj 1. A lamp-body composed of upper and lower semispherical parts which are connected by a horizontal joint extending aroundv in the spherical curvature of the body and which are overlapped by the marginal portions of the other part, the body being provided with a side opening which is intersected by said joint, substantially as set forth.

Witness my hand this 19th day of August, Y

Vitnesses:

FRANK C. CROWELL, EARL S. BoRsT.

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