Detector for wireless telegraphy.

C. 0. LORENZ.

DETECTOR FOR WIRELESS TELEGRAPHY.

APPLICATION FILED APB. 30, 1914.

1,159,969.

Patented Nov. 9,1915.

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UNITED STATES PATENT OFFICE.

CHARLES 0. LORENZ, OF PORT ARTHUR, TEXAS.

DETECTOR FOR WIRELESS TELEGRAPHY.

1159 969. Specification of Letters Patent. Patented NOV. 9,1915.

Original application filed November 7, 1010, Serial No. 591,130. Divided and this application filed April 30, 1914. Serial No. 835,498.

To dll whom it may concern:

Be it known that I, Charles O. Lorenz, a citizen of the United States, residing at Port Arthur, in the county of Jefferson and State of Texas, have invented certain new and useful Improvements in Detectors for Wireless Telegraphy, of xvhich the following is a specification.

This application is a division of my application filed November 7, 1910, Serial No. 591,130, and relates to a detector for use in high frequency electrical signaling systems, and particularly to the so-called minerals or substances employed for making electrical contact as well as to the devices in xvhich the minerals are mounted and through means of xvhich they are manipulated to vary the contact.

The minerals employed and which I have found in practice to give superior results are a combination of copper and sulfur known commercially as chalcocite, containing about 79.8% of copper and 20.2% of sulfur; also a combination of zinc and oxygen knoxvn commercially as zinkite and consisting of about 80.3% of zinc and 19.7% of oxygen. These txvo minerals are mounted in the respective cups or holders in position to be brought into contact one xvith another.

The mechanism for mounting the minerals or contact substances in adjustable relation, contemplates the use of means for adjusting the txvo contacts to and from each other; resilient means through xvhich they are made to press one upon the other, with adjustment for varying such pressure at xvill and maintaining substantially the desired pressure notwithstanding other adjustments in the contacts; means for roughly adjusting the contacts in the plane of their impingement, so that any part of one may be caused to contact with any part of the other; and means for effecting a fine adjustment in their plane of impingement, xvhereby the range of variation in contact points is correspondingly increased.

The invention also contemplates a cut-out sxvitch through xvhich to shunt the detector with reference to the receiving circuit.

The invention xvill, be fully understood upon reference to the accompanying draxvings, in which— ...

Figures' 1, 2 and 3 are, respectively, a top plan viexv, a front elevation, and a side viexv of a detector constructed in accordance xvith 55 my inx^ention.

represents a base having mounted thereon a block 2 carrying a fixed arm 3 and a pivotally mounted arm 4. The arms 3 and 4 carry the contacts, and in order that the 80 pressure through xvhich the contacts bear one upon the other may be varied at xvill, arm 4 is mounted upon a pivot 5 and provided at one end xvith a pressure spring 6 exerting its influence upon the arm through 65 means of a set screxx* 7 that may be adjusted at will. The arms 3 and 4 are provided xvith disks 8 and 9, respectively, adapted to be rotated upon their true axes; the disk 8 being carried by a shaft 10 hav- 70 ing a rotating head 11 and being preferably threaded so as to serve the combined purpose of rotating the disk 8 and moving said disk bodily in the direction of its axis. The disk 9 is mounted by means of a circum- 75 ferential groove 12 receiving the forks 13 that are carried by the pivoted arm 4 and is thus made rotatable on the arm xvhich carries it, though xvithout bodily adjustment relatively to the arm. The disks 8 8© and 9 have eccentrically mounted in them, mineral cups 14 and 15. respectively; cup 14 being preferably supplied xvith chalcocite by soldering it therein, and the cup 15 being preferably supplied xvith zinkite xvhich may 85 be held in place by means of the set screxv 16.

The cups 14 and 15 are held in place-by means of the shanks or pins 17, 18, xvhich adapt them to rotate upon their oxvn axes; the shank 18 being also adjustable axially to 9© move cup 15 toxvard or away from the cup 1-1. After bringing the minerals into impingement by adjustment of the shaft 10 and the pin 18, they may be gix’en any desired relative adjustment in the plane of impinge- 95 ment, and caused to bring any point on either of them into contact xvith any point on the other, through means of the orbital movement xvhich each cup has by the rotation of the disk on xvhich it is mounted, fol- 100 loxved by a rotation of either or both cups on their oxvn true axes. These adjustments do not effect material change in the pressure with xvhich one bears against the other, because this is regulated by the spring 6 and 105 screw 7. This spring also permits of slight

1,160,000 axial movement in the shaft 10 and pin 18 incident to their rotation in effecting adjustments in the plane of impingement.

represents a switch arm pivoted at 20 g and having electrical connection with the pivot 5 of the arm 4.

and 22 represent two· contact pins adapted to be bridged by the switch arm 19.

23, 24 and 25 represent three binding ₁₀ posts, of which binding post 23 is connected to the contact pin 21 and is intended to receive an external wire from the inductance in the system, while binding post 24 is connected to contact 22 and is intended to re15 ceive a wire from one side of the condenser and receivers in the system, while binding post 25 is connected to the other side of the receivers and to the condenser. When the switch arm 19 is upon the contacts 21, 22, the 20 detector is completely shunted from the receiving circuit.

While I have described certain minerals which I prefer to use because of superior results obtained thereby, and certain mecha25 nism to be employed for holding the minerals in operative relation to each other, I desire it understood that I do not limit myself to the use of these features in combination, as either may be used independently of 30 the other or in combination with some suitable substitute.