US1844807A - Remote control switch - Google Patents

Description

Feb. 9, 1932. F. J. SORELL REMOTE CONTROL SWITCH Filed Dec. 27, 1926 16 I v J J8 Q t v 32 i gxia 6 g Patented Feb. 9, 1932 FRANKLIN J. SORELL, OF CHATTANOOGA, TENNESSEE REMOTE CONTROL swrrcn Application filed December 27, 1926. Serial No. 157,259.

This invention relates to a remote control switch for controlling distant electric translating devices, especially adapted for closing the circuit between a radio receiving set and its A-battery, but of use in any distant control circuit containing electric translating devices. A desirable characteristic of the switch is its rapidity of action by which a long closure of the operating switch will do no damage to the controlling or controlled apparatus, which is accomplished by an instantaneous opening 01' closing of the circuit of the translating devices. 'A further characteristic is that the electromagnetic control is 1 established by the same source of electro-motive force that is used to control the translating devices. The switch may be adjusted to open or close the remote control circuits, as desired.

In carrying out my invention I provide an electro-magnetic switch provided with a retractile armature carrying a knife-edged latch and mount a spring-controlled trigger on aplane transverse to the knife edge with a front and back stop adapted for inclusion in the control circuit alternatively, accordingly as the switch is to control an opening or closing movement of the translating device circuit. The apparatus outlined is extremely 0 sensitive in providing a reliable hair trigger release which instantaneously opens the circuit and puts beyond possibility damage to the translating device or coils by a prolonged action of the circuit controller.

My invention, therefore, consists of a remote controlled device governing circuits containing electric translating devices and adapted for opening or closing the same. The invention is primarily intended for use in connection with radio receiving sets rectified or amplified by a vacuum tube to simplify their control from a distant point or points and therefore conduce toward conserving the energy of the batteries.

The invention will be more fully understood in connection with the accompanying drawings and the novel features will be specifically indicated in the appended claim.

In the drawings: Figure 1 illustrates the system as applied to a radio receiving set as adapted for instantaneous opening by remote control of the circuit of the battery controlling the vacuum tube or tubes.

Figure 2 illustrates the system as modified by a mere shift of one circuit lead to permit closing control of the translating circuits.

Figure 3 is an elevation on a plane at right angles to Figures 1 and 2 of the electro-magnet.

Figure 4 is a sectional view in part elevation on the plane 44 of Figure 2.

Referring now in detail to the drawings,

1 represents a radio receiving set, the terminals of which are indicated at A+, A, and in which in normal operation an A-battery of a few volts with a rheostat controls a rectifying vacuum tube containing a heating filament. 2 represents one control dial of the receiving set, any number of which may be employed with corresponding tubes for amplifying purposes. A set of wires 3, 4 lead to a distant point where remote control is desired, which may be any desired distance and includes a circuit closer 5. An A-battery is located adjacent the receiving set or may be at a distance from the same if more convenient, as in a closet shelf where it will be out of the way. The circuit of the A-battery may be of any proper voltage to heat the vac- 39 uum tube filament for rectification of the high frequency radio impulses and amplification by the usual higher voltage B-battery. In Figure 1 is shown the electro-magnetic switch comprising an electro-magnet 6 mounted upon a base and cooperating with a rectractile armature 7 mounted on an elastic blade spring 8 carried by an angle bracket 9 secured to the base. The blade spring 8 has a free end spaced from the armature and forms a very thin line contact with a latch strip 10 carried by a leaf spring 11 anchored in an angle bracket 12 secured to the base. The leaf spring 11 is bent away from the latch piece 10 so as to form an elastic abutment to engage a front contact 13 with suflicient yield to permit ready latching when the operator raises the latch to engage the knife edge 8 of the armature. A back stop let is mounted in the plane of the latch which is engaged in its release position. v A binding post 16 is provided for the one terminal of the magnet and another binding post 16a is in electrical connection with the back stop 14 to which the positive lead 17 of the controlled circuit may be transferred to adapt the device for closing relation to the controlled circuit. Two other binding posts 18, 19. are provided, the. former leading to one terminal of the battery and a W connecting with the bracket 12, and the post 19 forming one terminalof the electro-mag-* net. The other pole of the battery leads .to .1

the negative side of the A-battery'by wire I Leads 3, 4 lead any desired distanceto-thecircuit controller 5. As thus described, the control switch is set by lifting the latch memher-10 to en age the knife edge at the top of the spring 8 which sets the electroemagnetic switch for open circuiting the receiver and ;when the switch 5 is closed no matter how long it'may be he'ldclosed the armature 7 is instantlydrawn overthe knife-edged spring, 8 and latch is shifted from front stop 13 to backstop, 14 thus simultaneously breaking y the translating circuit and the circuit through the electro-magnets of the electro-magnetic switch. Thenormal circuit is from-the neg-, ative side of the i l-battery is ig.-1 over the lead 20,- battery post 18, armature 11, back-stop. :13, post 16, lead 17 to the positive side of the radiol hiscircuit does not include the coils of the nia-gnet'but by closing the remote control switch 5 the ba ter}: is placed in the circuit by way of frontstop 13to one side of the" asricoils andtby way of vbinding post 19 andx distant lead i to-the switch, thus eifecting opening of the circuit.

In Figure 2 the latch is shown in its on position and the positive lead 17 from the re-- 40%;ceiving set goes to the binding 'post-16a'and the receiving set is put in closed circuit relationto the Av-battery; if thelatch is set, the circuit will be opened. When the switchi5a is operated'the magnet will release thelatch iiand close the battery to the radio set. i I have described the invention as primarily intended for use in connection wit-hradio receiving?- sets, but it is of efficient application to other types of :circuits. where distant control is fii ne-eded, such as burglar alarms or-other types of electrictranslating devices where remote control isdesired.

tures, the rapidity of actuation prevents burning out of the electro-magnets by reason of the quickness of opening of the circuit and as prolonged pressure of the circuit controller has no effect on the controlled circuits the switch becomes fool-proof from careless management:

Having thus-described my inventionewhat I claimas new and desire to secure by Letters Patent is:

A switch comprising "a 'base, an electromagnet mounted upon said base, a retractile armature for the electro-magnet, an angle bracket securedto-saidbase adjacent to the electro-magnet, a blade spring havingan end secured to the: angle bracket and being fixed to the armature, said bladespring having its: opposite end free and d1sposed-inspaced rela-"- tion-with respect to the armature, a second angle bracket securedto the ba-se at an incli nation,a leaf spring secured to: the second an le brackety a :latch strip secured to "the leaf spring intermediate itsendsand extend-' ing beyond thefree end of the leaf springtd 2 be received by the free end ofthe blade springfor contacting engagement therewith where by the latch strip'is held under tension by t said bladeaspring, said leaf spring havingits free end spaced from the latch strip, a contact arranged in .thepathof-the free end of the leaf spring,*and a contact arranged in the-- path of the latch strip. In testimony whereof FRANKLIN J. SORELL; .7

The latching mechanism described is an i exceedingly sensitive one as the movement of fi ncthe armature a microscopic distance against a spring pressure at right angles to the move-* ment gives a hair trigger effect of remarkable sensitivenessn Of special value in reinote control devices is the potential drop on filong circuit wires, reducing the ampera'ge to an extent that :very weak, magnetization.

exists in the cores ofthe magnetic releasing devlc'eh Vfith my device, however, this dis- I ability is offset by the. sensitiveness of-ithe mechanism, In addition to the sensitive fea- I afiix my s1gn-aturer- IOU

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