US1231629A - Telephone-switchboard. - Google Patents

Description

H. H. LOWRY.

TE LEPHONE SWITCHBOARD. APPLICATION FILED 0CT.I2 I915- 2 SHEETS-SHEET I.

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H. H. LOWRY.

TELEPHONE SWITCHBOARD. APPLICATION FILED OCT. 1.2; 1915' 1,231,629., Patented July 3; 1917.

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HITER H. LOWRY, OF CHICAGO, ILLINOIS, ASSIGNOR, BY MESNE ASSIGNMENTS, TO WESTERN ELECTRIC COMPANY, INCORPORATED, A CORPORATION OF NEW' YORK.

TELEPHONE-SWITCHBOARD.

Specification of Letters Patent.

Patented July 3, 191W.

Application fi1ed. October 12, 1915. Serial No. 55,393.

To all whom it may concern:

Be it known that I, Hrrnn I-I. LOWRY, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Telephone- Switchboards, of which the following is a full, clear, concise, and exact description.

This invention relates to telephone exchange switchboard equipments, andmore particularly to exchange equipments in which there are a plurality of operators positions, each including a plurality of switchboard sections.

The object of this invention in general is to provide equipment for such exchange which will be flexible and easily changed to meet different service requirements without a complete change in wiring and equipment.

In accordance with the general features of this invention, the separate sections of the equipment are made divisible with a portion, which will be standard for all service conditions, remaining fixed, while the portion carrying the apparatus and equipment to be changed is readily removable. More specifically, the upper part of the sections containing the line and multiple jacks is made standard for all equipments, and the lower portion of the section containing the apparatus associated with the cord circuits is made easily removable and interchangeable.

In the drawings illustrating this invention, Figure 1 is a view infront elevation of a plurality of switchboard sections to which the invention is applied; Fig. 2 is a view in side elevation of one of the sections shown in Fig. 1; Fig. 3 is a fragmentary view, with parts in section, illustrating details of the invention; Fig. 4; is a fragmentary detail view showing the positions separated; and Fig. 5 is a detail sectional view of parts of the section.

As shown in the drawings, the switchboard section is composed of an upper portion 5 and lower portion 6. The upper portion 5 is built around a generally rectangular frame, two of the vertical members of which are designated by 7 and 8 and a horizontal member by 9. 10, 11 and 12 designate two vertical members and a horizontal member of the frame of the lower portion. The upper portion 5 is completed with suitable paneling and molding, and has mounted in its front a plurality of jack strips 15, 15 containing jacks with which are connected the cables, including the multiple and line wires. A piling strip 16 for supporting the jack strips in proper alinement is secured to the lower. horizontal frame member 9 by means of corner braces, such as 17, shown in Figs. 3, 1 and 5.

Mounted upon the lower portion 6 of the section is a plugshelf 20 to which is hinged a. keyshelf 21, and a cordshelf 22 to which one end of a cord 23 is attached, the other end being attached to a plug 24 adapted to cooperate with the jacks in the upper portion of the section, as is well understood. The cordshelf 22 is secured to the upper horizontal frame member 12 of the lower portion by means of angle braces, such as shown at 25 in Figs. 3 and 4. An angle brace 26 secured to the frame member 12 is adapted to have the piling strip 16 secured thereto by means of screws.

When the two parts of the section are in place, the frame member 9 of the upper portion 5 rests upon spacing blocks 30 and 31 on the frame member 12 of the lower portion, and is held in place thereon by means of the plate 35 at the rear of the section, by the angle brace 26 at the forward side of the section and screws 36 extending through the piling strip 16 into the plugshelf.

In order to separate the portions of the section for the purpose of substituting a new lower portion, it will be necessary only to remove the screws from the lower end of the plate 35, remove the screws from the angle brace 25 to permit the cordshelf 22 to be dropped down into the lower portion 6, re move the screws 36 extending throughthe piling strip 16 into the plugshelf, remove the screws from the horizontal portion of the angle brace 26 and knock out the spacing blocks 30 and 31. The lower portion will then be readily removable from the upper, which may be supported by the adjacent section or sections, or by jacks, until a new lower portion is substituted for the one removed. The parts may then be secured in their original position.

It will be understood that the lower portion contains only such apparatus as is necessary to cooperate with the cord circuits, with possibly some battery leads which may be readily removable.

Th main advantages of a structure sueh as described are that in multi-section olhces it may become desirable to switch over from one class of service to another, which will require only a change in cord circuits, in which case it will be convenient to substitute for the lower portion of the section one which is equipped with the proper cord circuits, or in already existing equipments it may be desirable to interchange switching sections, and this invention makes it possible to do so with the minimum amount of work. Further, such a structure is of advantage from a manufacturing standpoint since the upper portion may be made standard for nearly all classes of systems and carried in stock ready for shipment, and the lower portions may be made up completely wired and shipped separately. There is also a decided advantage in shipping. Many other advantages are also present as will be readily apparent to those skilled in the art.

lVhat is claimed is:

1. In a telephone switchboard equipment, in combination a plurality of switchboard sections each comprising two portions, one

of said portions of each equipment being permanently wired for several classes of service, and each of the other portions being wired for dilierent classes of service and interchangeable, whereby any one of the latter portions may be moved into position to cooperate with any of said permanently wired portions.

2. In a telephone switchboard equipment, a section comprising two portions, one of which is permanently wired for line and multiple jacks, the other of which contains the apparatus andconnection for link circuits to cooperate with said jacks, said second named portion being removable from said first named portion, wherebylink circuits wired for different classes of service may be readily substituted for others in an exchange equipment without disturbing the apparatus and connections therefor in either the permanently wired portion or the removable portion.

lnwitness whereof, I hereunto subscribe my name this 7th day of October A.D.,

HITER H. LOWRY.

Copies of this patent may be obtained for five cents each, by addressing the Gommissioner of Patents Washington, 1). G.

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