US975918A

US975918A - Lock for switches.

Info

Publication number: US975918A
Application number: US57385910A
Authority: US
Inventors: Gottlieb Wuelser
Original assignee: Individual
Current assignee: Individual
Priority date: 1910-07-26
Filing date: 1910-07-26
Publication date: 1910-11-15
Anticipated expiration: 1927-11-15

Description

G. WUELSER.

LOOK FOR swn'tmns. APPLICATION FILED JULY 26, 1910 Patented Nov. 15,1910.

2 annms-arinnrr 1.

G. WUELSBR. LOOK FOR SWITCHES.

APPLICATION FILED JULY 26, 1910 Q 975 91 Patented N0v.15, 1910.

v T zsnnms-snpnim J2 J l? the 011 as disclosed in my

prior ments

10 and 11.

and

lock, Fig. 4 is a plan of 'mg' revolubly mounted upon the former.

a, or txnnsmea'on, rnnnsrtvanm.

LOCK ron swrrcnns.

specification of Letters Patent Patented Nov,

975,918. Application filed July 26, 1910 Serial No. 573,859. I

To all whom it may cone-em: Be it known that I, GOTTLIEB Wunrsnn a citizen of the United States of America, residing at New Kensington, in the countyof' estmoreland and State .of Pennsylvania, have invented certain new and useful Im-' provements in Looks for Switches of which owing is .a' specification, re erence be-. ing hadtherein to the accompanying draw mg. p g This invention relates to locks for switches, is an improvement in connection with the lock disclosed in my pending application filed June 18, 1910, Serial No. 567,624.

Besides having the. same objects in view application, the present invention-aims to simplify the construction, provide parts that can be easily manufactured and assembled, and to provide a lock that is positive in its operation and free from injury by ordinary use.

Reference will now'be had to the accompanying drawings, which illustrate the best form embodying my invention, the said invention being fully disclosed in the following description and claims.

the drawings :-Fi ure 1 is a plan of the lock, Fig. 2 is' a sic le elevation of the same, Fig. 3 is a cross sectional view of the a detached upper locking member, Fig. 5 is a side elevation'of the same, Fig. 6 is a plan of a detached lower locking member, Fig. 7 is a side elevation of the same, and Fig. 8 is a perspective view of a detached binding post adapted to form part of the lock.

lock in accordance with this'invention comprises a stepped cylindrical metallic casing 1 having the lower edges thereof provided with a peripheral flange 2, which is screwed or otherwise connected, as at, 3 to a base plate 4. The casing 1 has the top 5 thereof provided'witha central opening 6, and secured by screws or other fastening means 7 to thein'ner side of the annular shoulder 8 of said casing. is a horizontal partition 9 dividing the casing 1 into compartfor the u per lockin tral beariiig surface is 16- having the u serrated, as at 1 member and this cenprov ded with a post per end thereof toothed or and reduced and threaded, disk 12 has the periphery or notched, as at 19 and is provided with a circumferentiall arranged slot 20- having the ends thereof closed in proximity to each other,'with the intermediate portion of said slot in communication with the outer edges of the disk by an open slot 21. The outer walls of the slot 20 are scallo ed or notched, as at 22 similar to the perip ery'of the disk 12.

The upper locking member is similar to the lower lockin member, with the exception that the dis 23 has a central vertical opening 24 providing clearance for the 0st 16 of the lower locking member, thedis 23 also having a central toothed or serrated collar 25 extending upwardly through the opening 6 of the casing 1. The disks l2 and 23 are of the same diameter and with these disks assembled in the compartment 10, the

slots

20 and 21 of the disk 12 are normally in vertical alinement with the

slots

26 and 27 of the disk 23.

Mounted upon the toothed or serrated collar 25 of the upper locking memb sleeve being clamped upon the collar by a set screw 30 mounted in lugs 31, carried by the split ends of the sleeve.

Mounted upon the toothed or serrated portion 17 of the post 16 is a split sleeve 32,

said sleeve being clamped thereon by a set screw 33 mounted in lugs 34, carried by the split ends of the sleeve. The sleeve 32 is provided with an angularly disposed indicator 35 of a greater length than the indicator 29 and adapted to swing over said indicator.

Screwed upon the reduced and threaded end of the post 16 is a knurled nut 36 which positively retains the

sleeves

28, 32 and the locking members in an assembled position.

he top of the casing 1 is graduated similar to a clock, the indicator 29 corresponding to an hour hand and the indicator 35 corresponding to a minute hand.

Mounted in the partition 9 adjacent to the openin 14 thereof is the shank 37 of a bifurcated fiinding post 38, said binding post being retained upon the partition by nuts 39 screwed upon the lower end of the shank 37,

Revolubly mounted in the compartment 10 of the casing 1 is a lower locking member and an upper locking member, the latter be- The lower locking member comprises a disk 12 having a central depending pin 13 extending into an opening 14 provided therefor in the partition 9. The upper surface of er is a split v sleeve 28 havlng an indicator 29, said split the disk 12 has a central bearingsurface 15 i or conductor 40 in engagement w t retain wire or cond these nuts also retaining the ends of a wire h the shank 37.-

Mounted up the cas' 1 is a bifurcated binding post 41 having threaded shank 42 thereof extending through the shoulder 8 and the edge of the artition 9, said binding post being in position by nuts 43 screw upon the shank 42, said nuts retaining a uctor 44 in engagement with the shank. The bifurcation or openin 45 of the binding post 41 longitudinally a ines with an o ening 46 formed in'the casing 1 and with t e binding post 38.

I Movably mounted the

binding posts

38 and 41 is a switch. arm or blade 47 having the outer end thereof provided with a handle The arm 47 is rectangular in cross section and has the inner end thereof reduced and cylindrical, as at 49 to enter the binding post 38. The arm 47 adjacent to the reduced end thereof is provided with a vertical cylindrical pin 50 extending upwardly through the

slots

20 and 26 of'the

locking disks

12 and 23 res tively. To insure a contact between the inding post 41 and the arm 47, the up 1' edges of the binding post 41 are provi ed with apertured lugs 51 adapted to be connected and drawn together by a set screw 52.

The pin 50 extending upwardly through t e i the

slots

20 and 26 is adapted to retain switch arm 47 in engagement with the

bindmg posts

38 and 41 and complete an electrical circuit. To shift the arm 47 to break the electrical circuit, it is necessary that the locking members be shifted whereby the

slots

21 and 27 of the

disks

12 and 23 res ctively will vertically aline and provide pin 50, the outward movement of said pin being limited b the casing 1, which preventsthe switc arm 47 from becoming accidentally disengaged from the casing, but allows the reduced cylindrical end of the armto moved out of en agement with the binding post 38. To shift the

locking disks

12 and 23 to release the pin 50, it is necessary that the operator of the lock be familiar with the combination, otherwise considerable difiiculty and time consumed in arriving at t e proper combination to release the pin 50.

.After-the arm 47 has been shifted outwardly and the circuit broken, the

locking disks

12 and 23 can be shifted to revent the arm 47 from being restored to its normal position, consequently a machine equipped with the lock could not be started except by the authorized operator. By providing t e outer edges of the

disks

12 and 23 and the outer sides of the

slots

20 and 26 with notches, a person tampering with'the lock or attempting to openthe will be deceived and on the annular shoulder 8 bf maintaining teriorly will be ex eri'enced the outer bindingpost tend into said casing and engage the innermisled, believing that the lock cntains tumblers on account of the noise 1produced by the pin 50 riding over the sea oped or note ed edges of the locking The lock has been designed whereby one or more switch arms or blades 47 can be used in connection with the lock, as shown in 1 of the drawings, one set of the combmations releasin oneof the arms and another set of comb thus that the lock .can be used for controlling the opening and closing of one or more circuits.

The switch arm 47 can be made of malleable metal, wherebythe end 48 can be bent upwardly after the arm'has been placed in the casing 1, or the pin 50 can be attached to the arm after said arm has been inserted in the opening 46 and prior to connect ng the partition 9 to the casing. Suitable insulation can be used where necessary tor separate and distinct circuits in connection with the switch lock.

'From the foregoing it is apparent that I have devised a novel lock for switches embodying superimposed locking disks for retainin a contact arm' in an adjusted position, t he arm being arranged whereb it will normally contact with an outer bin ing post and can be easil shifted into engagement with an inner binding post, thus completing the circuit between i e posts.

What I claim is 1. In a lock for switches, a base plate, a casing carried by said plate, a horizontal partition mounted in said casing and dividing said compartment, slotted locking disks rotatablv mounted in the upper compartment of said casing,ibinding posts connected to said partition with one of the binding posts exof said casing, a locking arm movably mo 'nted in the upper compartment of said casing and normally in en agement with the outer binding post and a apted to engage the inner binding post, a pin carrie by said arm and extending upwardly through said slotted disks, and means on top of said casing for rotating saiddisks to release the pin of said arm.

2. In a lock for switches, a plate, a casing mounted upon said plate, a partition arranged in said casing, a binding post carried by said partition, a binding post car-' ried by the outer side of said casing, a switch arm normally in Engagement with binding post, and rotatable locking disks arranged within said casing andadapted to lock said arm in engagement with said binding post. 3.. A lock for switches, comprising a casing, a switch arm extending into said casnations another arm. It is easing into an upper and lower adapted to ex- 7 casing and ing, a pin carried by said arm within said normally retaining said arm in said casing, locking disks revolubl mounted in said casing for engaging said pin and fixing said arm relatively to said casing, and means arranged upon said casing for adjusting said disksto release said pin.

.4. A. lock for switches, comprisin a casing, a binding post arranged exterlorly of sad casing, said casing, a switch arm normally held in engagement with the exterior binding post and adapted to extend into said casing and engage the interior binding post, a pin carried by said switch arm for normally retaining said arm within said casing, slotted superimposed locking disks adapted to engage said pin and hold the arm thereof in ena binding postarranged within ga ement'with the interior binding post,

and means arranged upon said casing for 20 rotating said disks, said means including sleeves and indicators carried thereby.

5. In a permutation lock for switches, the combination with a switch arm adapted to complete a circuit, of a pin carried by said arm for limiting the movement thereof, superimposed locking disks adapted to engage said pin for locking said arm, and means for shiftlng said disks.

In testimony whereof I aflix my signature 30 in the presence of two witnesses.

GOTTLIEB WUELSER.

' Witnesses:

THEODOR 'ZUND, KARL KoTToRs.