US891129A - Switch-lock. - Google Patents

Description

PATENTED JUNE IG 13G? W. ANDERSON. SWITGH LOOK. APPLICATION PILBQAPR. 11,1907.

2 SHEETS SHEBT Z.

Sad manta:-

-- .Z'o all whom it may concern:

1 Memphis, in'the county of of Tennessee, have nyented oertain new and UNITED STATES PATENT onlnon WILLIAM ANDERSON, 'oFMEMP-Hrs, TENNESSEE, ASSIGNOR TO A. A. STRANGE, or MEMPHIS,

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SWITCH-LOCK.

Specificationof Letters resent.

, Patented June 16, 1908.

Application filed April 11, 1967. serial No. 367,601.

Beit known'that I, Wr'LmnMAnD RsoN, ,a citizen of the United States, residing at Shelbyand State useful Improvements in Switch-Locks; and I do declare the following to be a full, clear, and exact. description of the invention, such as will enable others skilled the art to which it, appertains tom'ake and use the same."v V

This invention relates-to an improved key cannot be reposition.

One object of the invention is to provide a switch lock comprising a simple construction which'will reliably hold the lever for moving the switch so that it cannot be moved eX.

cept by the'person who holds the key to the i lock.

YAn'o'ther object is to provide aswitch lock composed of-two members one of which is always locked against movement when the '-'other is unlocked and vice versa,

In the accom anying drawings, Figure 1 represents a si e elevation of the switch Stand with this improved'lock applied thereto; Fig. 2 represents a top plan view of the lock casing with the top removed to shov's the workingv vhich are in position to lock the "SWItGh operating lever against movement llig. 3 represents a similar view with 'th'working parts shown in-the positionv which they assume when the switch lever is unlocked; Fig. 4 represents a longitudinal section taken on -line represents a perspectlve view of the s 1g. 6 represents a perspective view of the latch detached Fig.- 7 represents a bottom-plan view.

of the cover; Fig. 8 shows the key used for locking. the device.

In the drawings is showna turn-table or; look casing 10 rotatably mounted on the upper side of a platform 1 by means of a shaft 2 to which it is fixed. The shaft 2 passes loosely through the platform 1 and isconnected at its lower end with a lever for moving the switch points (not shown) and at it's top is provided with the usual signal (not shown). The lock casing 10 is provided with suitably shaped recesses in which are disposed the operating parts,.and with a detachable top 11. having a recess or chamber 44 of Fig. 3 .Fig." 5'

, oted to the casing is adapted to move.

A locking member orbolt 13 for the lever is mounted to slide transversely in a recess in the casing lOand a coiled spring 14 is disposed onits inner end on a guide pin 15, said spring bearing at one end against a shoulder 16 on the member 13 and at its other end against-the casing wall. of this lever-locking member is preferably of rectangular form and is provided with, a laterally-extending step-shaped block or arm 19, the recess 20 thereof being adapted to engage the inner end of the lever 35 and lock it in raised position. This member 13 alsois The body provided, at its upper end with a head 18 which lies on the outside of the casing across an opening in the side wall thereof through which the member projects and slides. This locking member 13 also has a stepped notch 21 in-its upper face for receiving a locking bar or latch22. This bar 22 is pivoted at one end in a longitudinal recess formed near-one side of the casing at right-. angles to the bolt or looking member containing recess and extends across the top of the bolt 13. This bar 22 is bifurcated at its free end to receive a key 23 for releasing it from the bolt. A spring 24 is attached to the top of the casing above the bar to hold said bar in engagement with the bolt-notch 21 .A key chamber 24 is formed beneath the free end of the lockingbar or latch 22 and has a key-hole26 opening throu h the side Wall of the casin through which t 'e key (not shown) is passed to liftthe bar 22 out of engagement with the bolt 13 and permit it to be ushed in to release the lever 35, as hereina ter described.

' The arm or block 19 is adapted to-move in the path ofthe inner'end of the hand-lever 35 to lock the lever in vertical position in enrevent the manipulating of the switch. en it isdesired to manipulate the switch, the key23 is inserted throu hthe ke -hole 26 and given a half turn whiE raises t e bar 22 out of engagement with the bolt-notch 21 and permits'said bolt to be pushed inward against the tension of its sprm 14 and the lever 35 may then be raise am i operated. .One side of the lever 35 when raised engages the inner edge of the arm and holds the locking member 13 in retracted position. and the tension of the spring of said gagement with the platform 1 and thereby a the switch member tends to holdthe lever up. The lever, and means for releasing said member key cannot be removed from the lock while.

the-lever is elevated, a an I claim as my invention 5 1. A 'switch lock, comprising a casing, a lever pivoted to said casing having one lever, pivoted to said casing, a spring pressed end movable therein,.an approximately L- bolt mounted to s'lide in saldcasing and hav shaped spring-pressed locking member with ing a laterallyprojecting arm ada ted toiexthe short arm thereof movable-transversely ,tend transversely across the pat of said across the pathof said lever and having one lever in one position to lock said lever in. faceadapted to engage and lock said lever lowered position, said arm being provided when the latter is m lowered position, and with means for irictionally engaging and the other face of said arm adapted to fricthe lever to be operated.

to (permit the locking member to be shifted 3. A .switchlock comprising a casing, a

holding said lever in raised p'os1t1on, a locktionally engage one side of the lever and hold ing bar for holding said bolt in forward posiit in engaged position, means for locking tion-in the p)ath of the lever, and means for said arm in engagement with said lever in raising said ar to close said bolt and permit its lowered position, and means for releasing the arm thereof-tdbe moved out of the path the said arm from said lever. I

of the lever. A .v v In'testimony whereof I have hereunto set 2. In a switch rlo'ck, the combination of a my hand in presence of two subscribing witcasing, a lever pivoted to said casmg,' an. nesses'.

- L-shaped locking member arran edzm said Y casing with its short arm arran e to project WILL-1AM ANDERSON normally across the path of sai lever to lock Witnesses'z' it in lowered position, means for locking said M. A. CANDLER, member in said position in the path of the H. H. RAY.

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