US716460A - Multiple switchboard. - Google Patents

Description

No. 7I6,460. Patented Dec. 23, I902.

w. E. McCDRMIGK.

MULTIPLE SWITGHBDARD.

(Application filed Aug. 26, 1901.)

(No Model.)

lZw-aza 2 UNITE STATES ATENT OFFICE.

I/VILLIAM E. MCCORMICK, OF CHICAGO, ILLINOIS, ASSIGNOR TO INTER- NATIONAL TELEPHONE MANUFACTURING COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

M ULTlPLE SWITCHBOARD.

PECIFICATION forming part cf Letters Patent No. 716,460, dated December 23, 1902.

Application filed August 26, 1901. Serial No. 73,361. (No model.)

To all whom. it may concern.-

Be it known that I, WILLIAM E. MCCOR- MICK, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and nseful Improvements in Multiple Switchboards, of which the following is a full, clear, and exact description, referencebeing had to the accompanying drawings-forming a part of this specification.

My invention relates to multiple switchboards, and particularly to the construction of spring-jacks or terminal sockets of telephone-lines in switchboards of this type; and the object of the invention is to produce a strong and simple jack and a strip or range of jacks comprising a simple and economical organization of the parts.

The invention comprises certain organizations and arrangements of parts,which will be described in the specification and pointed out in the claims.

In the accompanying drawings, which illustrate my invention, Figure l is a broken top View of a range or strip of spring-jacks embodying my invention. Fig. 2 is a plan view of the same strip from below. Fig. 3 is a rear elevation of the strip or range of jacks. Fig. 4 is a front elevation of the range or strip of jacks, and Fig. dis a section taken vertically on the center line of an individual spring.- jack.

The front rail of the frame of each range of jacks consists of two strips a and a of suitable insulating material and an interposed strip 1) of metal, the latter being provided with means at each end for attaching the same to the framework of the switchboard. The strip 1) is preferably bent near its ends, as shown in Figs. 1 and 2 of the drawings, and is provided at its extremities with half round grooves or sockets to receive a suitable attaching device, whereby the same is secured in place on the switchboard. The several strips comprising the front rail of the frame of the range of jacks are suitably bored, as shown in Fig. 5, the bore of the metallic strip 5 being somewhat larger than the bores of the adjacent insulating-strips a. and ct, whereby the thimbles or test-rin gs cby which these several parts are united are out of contact with and properly insulated from the body of the metallic strip, as clearly shown in Fig. 5. The thimbles or test-rings c of the jacks are preferably somewhat flared at their front or exposed ends to present broad and rounded surfaces for the applicationof the testingplug and to more readily center the line-plugs and to aid in binding the several strips of the rail together. The thimbles extend through the front rail and are screw-threaded at their rear ends to receive the upturned ears d of associated terminal strips d, the ears being correspondingly screw-threaded to engage the threads of the thimbles, whereby the terminal strips are electrically connected to their corresponding test-rings, as shown in the drawings. 7 The cars engaging the thimbles and the flared ends of the thimbles bind the several strips comprising the front rail of the frame of the range or strip of jacks securely together, whereby these several parts are assembled together in a compact, strong, and simple construction.

The rear rail e of the frame is a strip or elongated block of suitable insulating material provided with transverse channels or grooves e and e on its upper and lower faces, respectively, having intermediate ribs e and e".

The terminal strips d are secured near their rear ends in the grooves e by suitable screws, as shown in Figs. 2 and 5, and their ends are formed with suitable means to secure electrical connection with the sides of their respective lines. The terminals 01 are preferably reduced in width toward their rear ends, where they enter the grooves of the block 6, whereby uniformity of parts is secured in assembling the several elements. The terminals d lie throughout their lengths in a horizontal plane, whereby rigidity of the range or strip of jacks is obtained.

The spring Zof each jack lies substantially parallel with its associated terminal strip and upon the opposite side of the center line of the jack, being provided at its front end near the rear end of the thimble with the usual downturned angular contact portion to engage the plug. The springs are secured to the block 6 in the transverse channels or grooves e of its upper face and toward their rear ends beyond the line of the block are provided with lateral ears or lugs Z and Z which respectively engage the front and rear edges of the block and prevent longitudinal displacement, as well as insuring uniformity of position in assembling the parts. The rear ends of the springs have suitable terminals. The springs are held in their channels by a suitable binding-strip a which is secured to the block by screws passing outside and intermediate the springs, as shown in Fig. 1, an intermediate insulating-strip e being used.

When the parts are assembled, the structure comprises a range or strip of jacks of simple construction and compact organization which may be readily placed in and removed from the board. The strips a and a of the front rail and the ribs 6 of the rear rail project below the terminals d, as shown in Figs. 3 and 5, whereby when the strips or ranges of jacks are assembled in place one above another in the switchboard proper insulation of the ranges Will be provided.

Having described my invention, I claim- 1. A range or strip of switches consisting of a front rail composed of outer and inner insulating-strips and an intermediate fastening-strip, all suitably bored, test-rings in the bores having flaring mouths and rear screw threads, a channeled rear rail, terminal strips in the channels of the rail and havingtapped ears to engage the threads of the test-rings, spring-terminals secured to the rear rail and extending parallel with and above the strips.

2. A range or strip of switches consisting of a front and rear rail, the latter having upper and lower channels, and the former consisting of insulating-strips and an intermediate fastening-strip provided with suitable bores, flared metallic sockets in the bores, terminal strips having screw connections with the sockets and secured in the lower channels of the rear rail, springs in the up per channels of the rear rail having lateral ears, and a retaining-strip for the springs.

3. A range or bank of switches consisting of front and rear rails, the front rail being composed of outer and innerinsulating-strips, and an intermediate fastening-strip, terminal strips connecting the rails, and springterminals on the rear rail, the rails extending below the plane of the strips to insulate the adjacent ranges or banks.

4. A range or bank of switches, consisting of a front rail composed of outer and inner insulating-strips and an intermediate fastening-strip suitably bored, metallic sockets in the bores having flaring front ends and screwthreaded rear ends, a rear rail having upper and lower channels formed by intermediate ribs, terminal strips in the lower channels having threaded connections with the sockets, springterminals in the upper channels, a retaining-strip therefor, the front strips and ribs extending below the terminal strips to insulate adjacent ranges.

In testimony whereof I affix my signature in the presence of two Witnesses.

W. E. MCCORMICK.

Witnesses:

ROBERT K. GUSTAFSON, JOSIAH MoRoBERTs.

Images