US1588467A - Switch - Google Patents

Description

June l5 1926.

1,588,467 A. M. PRUITT swmcn Filed May 1. 1922 2 sheets-sheet 1 ffy-z /7 rI? tm WITNSSES ATTORNEY June 15 1926.

WITNESSIS A. M. PRUITT swl'rcH Filed Mayv 1 1922 2 Sheets-Sheet 2 l NVENTOR ATTORNEY Patented June 15, 1926.

UNITED STATES AUGUST MARSHALL PRUITT, OF CLEVELAND, OHIO.

SWITCH.

AppIcaton filed May 1,

This invention relates to burglar alarms, which includes a circuit closer adapted to be associated with a window sash, so that incident to the movement of eitlier the upper or lower sash, the circuit is closed to sound the alarm whichA can be arranged at any desired location about the buildi The nature and advantages of the invention will be better understood when the following detailed description is read in con nection with the accompanying drawings, the invention residing in the construction, combination, and arrangen'ient of parts claimed.

In the drawings forming part of this application, like numerals ot' reference indicate similar parts in the several views, and wherein Figure 1 is a fragmentary view of a window showing the circuit closer associated therewi th'.

Figure 2 is a sectional view taken on line of Figure 1.

Figure o is an enlarged fragmentary view of the.` circuit closer removed from the window and showing the normal positionI of the parts.

Figure 4: is a sectional view taken on line 1-4 of Figure 3.

Figure 5 is a detail view of the liXed contacts.

Figure 6 is a detail view of one of the movable contacts.

Figure 7 is a detail view of the resilient finger.

Figure 8 is a detail view of the semi-disk like member.

Referring to the drawings in detail, A and B indicate respectively, the upper and lower sashes of a window of well-known construction, and the circuit closer forming the subject matter of the present invention indicated generally at C is arranged upon the top of the lower sash B.

rPhe. alarm (not shown) maybe arranged at any desired location about the building and connected in circuit, so that incident to the raising or lowering of either sash, the circuit is closed'to sound the alarm.

The circuit closer includes a metallic casing 10, and is provided with an aperturcd lug 11, through which a suitable fastening element 12 is passed in order to secure the casing 10 upon the top of the lower sash as illustrated in Figures 1 and 2. .Secured to one side of the casing is a piece of insulatA 1922. Serial N0, 557,585.

ing material 13 upon which is mounted a pair of movable contacts 14, each being of a resilient nature, andy curved in a manner shown to operate in the grooves 15 of the window casing. are fixed Contact strips 17 and it is of course understood that the movable contacts 15 slide over the contacts 17. One of the movable contacts is grounded to the casing. 'The other contact 1l is provided with a bit ling post to which is secured a conduct-irre; wire 20, the latter being ext-ended to the binding post 21 at the opposite side of the casing and mounted upon a piece of insulaing material Also supported by the bindin post 21 is a resilient contact linwhich is of substantially L-shaped 2mation and arranged to operate within the casing This r ilient contact finger is normally isnlated from the casing, and the circuit of course not closed or completed until m ved into contacting engagement with the casing. Arranged tol slide through opposed walls of the casing is a spring pressed plunger or rod 25, which is bifur@ cated at one end as at 26, and pivoted between the separated portions defined by said bifurcation, is a semi-disk like member 28 which has a flat side or face 29.

Aiso carried by the plunger is a rod 30 which operates within the casing through an opening 31 in one wall thereof. This red is provided with an offset extremity 32 which is aperturcd to receive the plunger, and held associated therewith by suitable lock nuts 35. The rod is disposed to engage the contact linger and move the latter into contact with the casing in order to close the circuit incident to the movement of either sash as above described. Slidable upon the plunger is a collar 3G which may be held 'tixed'to the plunger in any given position by means of a cotter pin or the like 37, and this collar is utilized to regulate the tension of the spring 39. Also sur/rounding the plunger rod is a sleeve 22', and this sleeve protects the threads of the plunger rod as will be readily understood. The sleeve is provided at one end with a hexagon flange 23 which forms one' of the lock nuts, thereby protecting the threads and acting as a movable bearing operating in the opening provided for the plunger rod.

In practice, the casing is mounted upon the upper part of the lower sash B, with they semi-disk like member arranged vertically Secured in these grooves Q Les and With its curved edge contacting the Window as illustrated in Figures l and 2. lt is of course understood that when the parts are in this position, the plunger is placed under tension of the spring 39, and consequently, When either sash is moved, the semi-disk like member is forced to turn about its pivot until the flat edge is brought into confronting relation with the glass, position which allows the plunger to move in a direction of the pane under the influence of the spring. Incident to this movement, of the plunger, the rod 3() moves in the same direction, engaging the finger 23, moving the latter into contact With the casing, and thereby closing the circuit. As above stated, the current passes through one oi' the movable contacts la, and from the binding post thereof through the conducting Wire through the binding post 19, through the finger 23 and the casing lO. rllhe iinger is normally insulated from the casing, and consequently, the signal cannot be sounded until this finger is moved into contact With the casing.

While it is believed that from the foregoing description, the nature and advantages of the invention will be readily apparent', desire to have it understood that do not limit myself to what is herein shown and described, and that such changes may be resorted to When desired as tall within the scope of What is claimed.

That lf claim is l. A circuit closer Comprising a 'frame included in a normally open circuit, and constituting a iXed contact, a. plunger slidably mounted on said frame and having one end bifurcated, a coil spring encircling the azi-ev plunger and bearing against the trame, a collar carried by the plunger and with which one ene of the spring is engaged, a movable Contact adapted to be moved into engagement with the hxed contact upon movement of the plunger in one direction, a semi-circular element pivotally mounted in the bi- ;turcated end o1 the plunger, and adapted to have its rounded edge normally set in engagement with an object to hold said mov- 'able contact spaced from the 'fixed Contact,

said element being moved upon its pivot ith the change of the relative positions of said object and element, thereby allowing the plunger to move under the influence oi' the spring to close the circuit.

2. Ac circuit closer comprising a frame included in a normally open circuit, and constituting a iizred contact, a plunger slidably mounted on the trame and having one end biturcated, yieldable means associated with the plunger for moving the latter in one direction, a movable contact arranged to be operated by the plunger and moved thereby into engagement with the fixed Contact, a semi-circular elem-ent pivoted in the bifurcated end or the plunger and having its rounded edge adapted to be set in engagement with an objectto hold the plunger retracted, and permitting movement of the plunger by said yieldable means, When the straight edge is arranged to contact said object incident to the change orp the relative positions of said object and element, an L- shaped member carried by the plunger and having one branch disposed to engage and operate said movable Contact as described.

In testimony vvhereoiC I aiiiX my signature.

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