US 1419550 A
Description (OCR text may contain errors)
F C. FISCHER.
I BENDINGJIG. APPLICATION FILED NOV. 19, 1919.
Patented June 13, 1922.
. M vemor: Frede /b/r C. Escher UNHTED FREDERICK c. rr's'ciina, or ERWYN. rumors, ASSIGNOB TO wns'rnan 'nLEc rRIc COMPANY, INCORPORATED, or new YORK, 1v. an, .A CORPORATION or New YORK.
Application filed November 19, 1919.
T 0 all whom it may concern:
Be it known that I, Fnnnnnrox C. Frsorrnn, a citizen of the United States, residing at Berwyn, in the county of Cook, State of Illinois, have invented certain new and use ful Improvements in Bending Jigs, of which the following is a full, clear, concise, and exact description.
My present invention relates to jigs and special tools for manufacturing processes and more particularly to the manufacture of vacuum tubes.
The object is to provide a simple and convenient jig for forming the required bends in the supporting wires of the tube stems.
To these and other ends the invention resides in certain improvements and combinations of parts which will be described later and the novel features pointed out in the claims at the end of this specification.
In the drawings, Fig. 1 is a perspective view of a jig constructed in accordance with and illustrating one embodiment of my invention and showing a stem in place therein after the wires have been formed; and Fig. 2 is a perspective view of the finished article in the manufacture of which the jig is utilized.
Similar reference numerals throughout the views indicate the same parts.
Referring first to the tube shown in Fig. 2 and to the stem thereof shown in Fig. 1, the said stem, indicated at A, contains the leadin wires B, and also an offset extension or post C, in which post various pairs of supporting wires D, E, F, G and H are carried. In the present instance we are concerned only with the pairs of wires 1) and G, which sup port the grid K shown in Fig. 2.
There is provided a yoke shaped member 1 which may be fastened to the bench by the devices 2 and the upwardly extending arms 3 of which constitute spaced standards. The upper ends of these standards are respectively notched at 4 and 5 to provide aligned seats for the stem, the first being occupied by the tip of the extension C, and the second being occupied by both the extension and the lead wires B, which latter rest in the bottom of the notch and support the inner end of the stem. The end of the main stem A from which these lead wires project abuts the standard at the base of the seat and defines the position of the article in the jig.
The walls of the notched seats 4 and 5 Specification of Letters Patent. Patented Jung 13 1922.,
Serial No. 339,181.
tioned in the jig the pairs of wires-D and G come adjacent to these posts, respectively, and are bent laterally around them, as shown in Fig. 1, giving them a preliminary bend in one plane. They are then bent in a relatively transverse plane by being formed downwardly along the arms 8 and 9. These arms are given the desired conformation to produce the proper angular relationship of the bends in the wire, the arms 8 having a straight face and the arms 9 having an inclined face for contact with the wire.
The lead-in wires B occupying the deeper seat notch 5 extend within the yoke in a protected position, while the filament supporting wires H project beyond the jig so that neither interferes or is interfered with during the bending operation.
hat is claimed is:
1. A jig for the supporting wires of a vacuum tubestem comprising a support having a depressed seat adapted to receive said stem and upstanding posts adjacent said seat around which the wires may be formed.
2. A jig for the supporting wires of vacuum tube stems comprising a depressed seat for the stem embodying upstanding posts around which the wires may be formed, and arms extending laterally from the posts to receive the wires for a further bend in a relatively transverse plane.
3. A for the supporting wires of vacuum tubes comprising a pair of spaced standards, notched to provide seats for the tube stem and having posts adjacent to the seats around which the wires carried by the stem may be formed.
41. A jig for the supporting wires of vacuum tubes comprising a yoke having notches in the ends of its arms to provide a seat for the stem, the walls of the notches comprising posts having laterally extending arms, and around which the wires may be bent in two relatively transverse planes.
5 A jig for a vacuum tube stem having supporting wires projecting therefrom, said jig comprising spaced supports for the stem and projections arising from each of said supports around which the wires may be formed.
6. A jig for a vacuum tube stem having supporting wires projecting therefrom comprising a support for the stem, a projection from said support around which one of said wires may be bent in one plane and, a second projection around which said last mentioned wire may be bent in a different plane.
7. A jig for a stem having a wire projecting therefrom comprising a support for carrying the stem and a pair of projections eX- tending from said support at an angle to each other around which the wire may be formed.
8. A jig for a vacuum tube stem having two port-ions and supporting wires projecting from each of said portions, said jig comprising a support for the wires projecting from one of said portions, a projection from said support around which one of the wires from said body portion may be formed, and a support for the wires extending from the other portion.
9. A jig for a stern having two parallel portions, a wire projecting from each of said portions, supports for the wires projecting from each of said portions and posts projecting from the support for one of said portions around which the wire of the other portion may be formed.
In witness whereof, I hereunto subscribe my name this 1 1 day of Nov., A. D. 1919.
FREDERICK C. FISCHER.