US2611061A

US2611061A - Electric safety switch

Info

Publication number: US2611061A
Application number: US140006A
Authority: US
Inventors: Paul B Richardson; Hershel C Richardson
Original assignee: Individual
Current assignee: Individual
Priority date: 1950-01-23
Filing date: 1950-01-23
Publication date: 1952-09-16
Anticipated expiration: 1969-09-16

Description

P 1952 P. B. RICHARDSON ETAL 2,611,061

ELECTRIC SAFETY SWITCH Filed Jan. 23, 1950 [2 6'. Richardson,

Patented Sept. 16 1952 UNITED STATES ELECTRIC SAFETY svvrironK Paul B. Richardson and Hershel C. Richardson, I Alexandria, Ind;

. u v I Application January 23, 1e5a's riai No. 14( ),066 1 i This invention relates to a new and. improved electric switch designed primarily as a safety switch for any desired circuit but not necessarily limited to the performance of a safety function.

The object of the invention is to provide an exceptionally simple and inexpensive switch construction embodying an elongated actuator whereby the switch may be opened and closed from a remote point.

A further object is to provide a novel construction in which the switch is of the simple pivotal blade type and in which the operating means is formed by a conventional push-andpull wire housed within a guiding and protecting armor which also prevents buckling of said wire.

Figure l of the accompanying drawings is a side elevation of the improved switch, partly broken away.

Figure 2 is an enlarged longitudinal sectional view.

Figures 3, 4 and 5 are sectional views cut on the correspondingly numbered lines of Figure 2.

In the form of construction herein described, an elongated, rectangular block 6 of insulation constitutes a supporting base for a pivoted switch blade I and contacts 8 with which said blade is cooperable to make and break a circuit. This block may be fixedly mounted in any suitable way.

The blade I is pivoted at 9 between metal lugs it which project from an integral base ll, said base ll being secured by screws 12 to the front side of the block 6 at one end of the latter. A conducting strip l3 has one of its ends [4 secured between the base I l and the block 6 by means of the screws l2 which extend through both said base H and strip end 14 and are threaded into the block as seen in dotted lines in Figure 4. In the present disclosure, the strip M has its end portions relatively offset to dispose its outer end l5 in a plane spaced rearwardly from the inner end 14 and to locate its intermediate portion l8 adjacent one end surface of the block 6. The strip end 15 is formed with an opening [1 instrumental in connecting said end with a binding post or other condutor (not shown).

The contacts 8 are integral with a base I8 which is secured to the front side of the block 6 by screws I9; and a conducting strip 20 which lies longitudinally against said front side of said block 8 has its inner end secured between said front side and said base [8 by means of the screws [9. These screws extend through the base 18 and the strip 20 and are threaded into the block 6, as dotted in Figure 3. A bolt 2| extends forwardly through the block 6 and the outer end of the 1 Claim. (o1. seek-716i) i strip20 and is-providedwithtwo nuts 22 and 23.

The nut 22 clamps the strip tightly against the block-'6, and the nut 23 coacts with said nut 22 and the bolt 2| is forming a binding post, whereby another conductor (not shown) may be electrically connected with the switch. Thus, when the blade 1 is closed, any electric circuit in which the switch is incorporated, will be completed, and opening of said blade will break said circuit.

A push-and-pull wire 24 is provided for opening and closing the blade 1 while the operator is at a remote point. This blade carries a transver e insulating sleeve 25 friction-fitted or otherwise secured between its ends in an opening 26, and one end of the wire 24 is formed with a return-hand hook 21 which is hooked into said sleeve 25, thereby pivotally connecting said wire 2 with the blade 1 and insulating the former from the latter for safety. A flexible tubular armor 28, preferably of coiled wire, is provided for the wire 24, and serves to guide and protect said wire and to hold it against buckling. One end of this armor- 28 is mounted in a novel manner hereinafter described upon the block 6, and the other end of said armor has suitable provision 29 for mounting it on a suitable support. Adjacent the means 29 is an operating knob 30 having a stem 3| to which the outer end of the wire 24 is secured. Obviously, the wire 24 andarmor 28 may extend to any required distance from the switch blade 1; and by pulling upon the knob 30. said switch blade I may be quickly and easily opened; and by pushing said knob said blade may be closed with equal facility.

A one-piece U-shaped metal bracket 33 rearwardly straddles the block 6 and has the free ends of its side arms 34 secured to opposite sides of said block by means of screws 35. These arms are free from contact with any currentconducting portions of the switch and said arms are disposed at opposite sides of the blade I. The arm-connecting portion 36 of the bracket 33 is spaced forwardly from the blade I and is formed with an opening 31 through which the inner end of the armor 28 extends. Nuts 38 are threaded on this armor end at opposite sides of the bracket portion 36 to adjustably anchor the armor to the bracket 33.

From the foregoing and the accompanying drawing, it will be seen that simple, inexpensive and practical provision has been made for attaining the desired ends, and while preferences have been disclosed, it is to be understood that variations may be made within the scope of the invention as claimed.

3 We claim: A switch comprising a base, switch means mounted on said base and including spaced contacts and a cooperating switch blade pivotally mounted at one end and movable in one direction 5 to open the switch and movable in the other direction to close the switch, a U-shaped bracket extending perpendicularly from the base with the free ends of the" side arms ofTtliie bracket secured to'opposite'sides of said base'in the vicin-- 10 ity of the disengageable contact zone, said bracket straddling the contact zone and the pivoted" switch blade with the closed end of theibracketw disposed in the path of movement of the free swinging end of said switch blade;'an elongated is tubular armor secured at one end to and projecting within the closed end portion .of said-4U- shaped bracket and projecting therein a nmaea" distance to limit the swing range of switch-blade movement, the other end of said armor being 20 remote from said; bracket;apush-and-pull ewire slidablyl extending, through zsaidrarmor one -,-end:- of ,saidwirer projectingginwardly; beyond said one end of said armor and extending in a substan-* tially straight line perpendicular to the pivoted switch blade and connected thereto adjacent its free end, the other end of said wire having an operating handle disposed at said other end of said armor.

PAUL B. RICHARDSON. HERSHEL C. RICHARDSON.

- REF-ERENCESILCITED The following references are of record in the file" of this patent:

UNITED STATES PATENTS Number- Name Date 1',219;531 Bricka Mar. 20, 1917 1,570,791 Thomas et a1 Jan. 26, 1926 2,277,671" Williams et a1 Mar. 31, 1942 2,458,930 Crooke Jan. 11. 1949 FOREIGN PATENTS Number" Country I Date'*" I 498,347 Germany" May'21'; 1930"