US1080362A - Lamp. - Google Patents

Description

J. G. MQGREGOR.

LAMP.

APPLIOATION FILED MAY 23, 1912.

Patented Dec. 2, 1913.

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JOSEPH G. MOGREGOR, 0F OAK PARK, ILLINOIS, ASSIGNOR TO THE ADAMS & WESTLAKE GOIVIIANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

LAMP.

To all whom it may concern:

Be it known that I, J osnrrr Gr. l\![cG-1ucoon, a citizen of the United States, and resident of Oak Park, county of Cook, and State of Illinois, have invented certain new and useful Improvements in Lamps, of which the following is a specification, and which are illustrated in the accompanying drawings, forming a part thereof.

The invention relates to lamps especially adapted for switch and signal service in railroad work, and. its object is to provide iiinproved means for securely holding the font within the body of the lamp, consisting essentially of a font seat within the body, provided with parallel walls, and a font having side walls of complementary form, the walls of the font and seat having horizontal interfitting channels and ribs.

The invention is illustrated in the accompanying drawings, in which- Figure- 1 is a detail vertical section of the lamp, transversely of the font; Fig. 2 is a detail in perspective of the font; F 3 is a detail in perspective of the lamp body with its side or font-receiving door open.

The body, 10, of the lamp, is ordinarily cylindrical in form, and is provided with a substantially flat bottom, 11, upon which the font, 12, rests, and with walls, 13, 14, rising from the bottom and forming parts of the font seat, the up er sections of these valls being inclined laterally and upwardly, as shown at 15, 16, and joining the side walls of the body.

The walls 13, 14 are horizontally channeled, as shown at 17, 18, and the side walls of the font are provided with ribs, 19, 20, adapted to fit within these channels and thus prevent the font from being thrown out of the seat by jarring incident to service.

A spring catch, 21, secured back of one of Specification of Letters Patent.

Application filed May 23, 1912.

Patented Dec. 2, 1913.

Serial No. 699,122.

the walls, as 13, projects inwardly at the forward end of the wall, and is adapted to engage the outer end of the font when occupying the seat, and thus prevent its longitudinal movement.

The body 10 is provided with a door, 22, shown as adapted to slide upwardly, for the purpose of permitting the insertion of the font into the body.

In lamps of this character, it has been customary to employ a spring catch, such as shown and described, for preventing the longitudinal movement of the font, but no adequate provision has been made for preventing the upward movement of the font, and as the result, jars and vibration incident to service have frequently thrown the font out of position, and thus moved the burner, 23, away from the axis of the lens, 24. In modern railroad practice, the lenses employed in this type of lamp have been perfected with a view to projecting the shaft of light in a definite direction, and for this reason it is of vital importance that the ilhuninating agent be located directly upon the axis of the lens.

I claim as my invention- In a lamp, in combination, a body, parallel walls rising vertically from the bottom of the body and being spaced apart from the side walls thereof and having their upper portions extended laterally to the lamp body walls, a font having vertical sides and being of such width that it slidingly engages the parallel walls, said parallel walls and the sides of the font engagcable therewith havlng inter-engaging horizontal ribs and channels.

J OSEPII G. MCGREGOR.

\Vitnesses A. H. Hnmcnn, C. MANDEVILLE.

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

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