US1687420A - Dialless radio - Google Patents

Description

Oct. A9, 1928.

D. D. BAST DIALLEss RADIO Filed Feb. 11, 192'?v Patented Oct. 9, 1928.

UNITED STATES DALE D. BAST, F BRADDYVILLE, IOWA.

DIALLEss RADIO.

Application led February 11, 1927. Serial No. 167,519.

This invention relates to wireless apparatus. for the transmission and reception of waves and including variable control mechanism containing a dal or like rotary part.

The invention aims to replace the dial or like rotary part by means of a pin or analogous recilinearly movable element, thereby simplifying the construction and the operation of the apparatus.

In accordance with the invention the shaft of the control mechanism, such as a variable condenser, is provided in its length with a plurality of arms set at different relative angles and the panel has rows of openings l5 formed therein opposite the respective arms to receive' a pin or like part which, when thrust through -an Opening and pressed forward to its llm't engages an arm and turns the shaft of the control a'determindate distance. l. i

While the drawingsillustrate a preferred embodiment of the invention, it is to be understood that in adapting the means to, meet specific needs and requirements, `the design may be varied and such other changes in the minor details of construction may be resorted to within the scope'of the invention as claimed, without departing from the spirit thereof.

For a full understanding of the invention and the merits thereof, reference is to be had to the following description and the drawings hereto attachd, in whichl Figure 1 is a front view of a radio-receiver, embodying the invention.

Figure 2 is a fragmentary sectional view on the line 2 2 of Figure 1, showing the operating pin, or like part.

Figure 3 is a detail view of one of the arms showing the manner of securing it to the control shaft in the required adjusted position, the parts being in section.

Corresponding and like parts are referred to in the following description and designated in the several views of the drawings by like reference characters.

The numeral 1 designates the usual cabinet of a radio receiver, and 2 the panel which is attached to the base 3. The control 4 is represented as consisting of a variable condenser and 5 is the operating shaft. A plurality of arms 6 are mounted upon the shaft 5 to turn therewith and are disposed at different relative angles, as indicated most the panel 2, as well as at different. angles, To admit of the arms 6 bel-ng adjustable on the shaft 5. each of the arms is provided at one end'with' an eye 7 of a size to snugly receive the shaft 5, and a. screw 8 threaded into an opening formed in a side of the eye 7 is adapted to engage the shaft 5 and secure the arm in the required adjusted position. In this manner the arms may be adjusted along the shaft or angularly with reference thereto. A contractile spring 9 is connected at one end to the base 3 and at its opposite end to an arm 10 projecting from the shaft 5, and this spring normally maintains the shaft 5 in a predetermined position, and operates to return it to normal position when released after being operated.

Rows of openings 11 are formed in the panel 2- oppos'te the several arms 6, and a pin 12, or like part, is adapted to be thrust through any one of the openings 11 and pressed inward to move the arm 6 in line with the row of openings through which the pin 12 has been passed. When the pin 12 has been thrust through the opening of the panel to the limit ofits movement the shaft 5 will have been moved a determinate distance depending upon the selected opening of the row through which the pin 12 has been passed and the inclination of the arm 6 with which the pin is in engagement, asv will be readily appreciated.

The face of the panel will be provided with numbers adjacent the rows of openings 11 to designate the wave lengths of different transmitting stations and these numbers are arranged in order and the arms 6 are so p0- sitioned that when the pin 12 is thrust through a selected opening the control will be adjusted to the desired wave length indicated by the number adjacent the opening through which the pin has been inserted. In this manner the wave lengths may be readily determined and ascertained.

A control shaft 13 is geared to the operating shaft 5, as indicated most clearly in Figure 2, so that a partial rotation of the operating shaft will effect an augmented rotation of the control shaft 13, thereby making it possible to rotate the shaft 13 a maximum distance for adjustment by thrusting the tuning pin 12 through a selected opening of a row of openings 11. The gear wheels connecting the operating shaft with the control shaft 13 may be of any determinate ratio, as will be readily appreciated. The large gear Wheel 14 is fast to the shaft 5 and the small gear Wheel 15 is fast to the shaft 13.

A pair of spring clips 16 is associated With each of the openings comprising the rows of openings 1l and serves to grip the pin 12 frictionally and prevent displacement thereof when introduced into a selected opening and pressed inward to the limit of its movement or to any desired point. By having the members corresponding to the Wave lengths of the different transmitting stations raised or depressed the receiver may be operated and tuned by the blind or in places where dial readings are not observable. Moreover, a given station Whose Wave length is known may be selected and tuned in at a moments notice by thrusting the tuning pin 12 into the proper one of the openings l1.

Having thus described the invention, I claim:

1. A radio mechanism including a controlling device having a shaft, a plurality of arms projecting from the shaft at different relative angles, a panel provided With rows of openings opposite the respective arms, and a pin adapted to be passed through a selected opening to engage an arm and move the control a predetermined distance.

2. In radio apparatus a control having a shaft, a plurality of arms adjustable on the shaft both in the length thereofand angularly, a spring having connection With the control to maintain it in given position, a panel provided with rows of openings opposite the respective arms, and a pin adapted to be passed through a selected opening to engage an arm and move the saine a predetermined distance.

In radio apparatus, a control device including a shaft, an operating shaft geared to the control shaft, arms fast to the operating shaft and disposed at various angles, and a tuning pin adapted to coact With each of the arms and move the same through a pre-r determined angle. i j t 4. In radio apparatus, an inclined member connected with a controlling device, a partprovided with a row of openings opposite the inclined member, a pin adapted to be thrust through a selected opening to move the inclined part through a. predetermined# angle. and pairs of spring clips associated with the openings to frictionally engage the tuning pin and hold it in the required adjusted position.

In testimony whereof I aiiiX my signature.

DALE D. BAsT. [1.. 5.]

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