Sept- 17, 1946. - 2,407,775 H. E. FROS'T INDOOR LATCH AND vLUCK Filed‘Dec. 11, 1944 2 Sheets-Sheet l ‘ '13 . .k 0 a- ,e/ 1 ,5/4! 292 1.0 '11 247-? #101 f‘ QLL 14,15 N \ 17' ' 21223 _ Inuem’or _ HoraceEFvosT A Sept. 17, 1946'. 2,407,775 H.E. FROST INDOOR LATCH AND LOCK Filed Dec. 11, 1944 - 2 Sheets-Sheet 2 . 5% \nuem’or Horace‘ggosf , ! A \"fornzg__ 2,407,775 Patented Sept. 17, 1946 UNITED STATES PATENT OFFICE 2,407,775 I INDOOR LATCH AND LOCK Horace E. Frost, Grand Rapids, Mich. Application ‘December 11, 1944, ‘Serial No. 567,541 5 Claims. (Cl. 292-169) 1 .2 This invention relates to a latch structure espe ‘cially adapted for use on inside doors and to tional construction. In installing the latch, a ‘cylindrical opening 2 is bored inwardly at the ‘which there may be readily applied a simple lock ing device which may be set at one side of the door and also released from the same side of the door, such type of latch and lock associated ‘therewith being usable in conjunction with bath free vertical edge of the- door and transverse - room doors. Further, with .my invention a means received within the opening 2, said casing at its openings 3 through the door and across the opening 2 toward the inner end thereof. The latch bolt assembly comprises a cylindrical cas ing 4, of an exterior'diameter such that 'it is open outer end :having an outwardly extending is ‘provided for an emergency unlocking of the latch, for example on a ‘bathroom door from the 10 annular?ange 4a which when installed, as shown ‘in Fig. 2 is covered by a rectangular plate 5 ‘of outside, which emergency operation will require metal inset at the edge of the door, and having an opening for the passage of the projecting end A primary purpose of the invention is to pro of the latch bolt. The casing 4 carries within it vide a latch construction both with and without ‘the inside look “therefor which is economical to 15 a coiled spring 6 which seats at its inner end against the bottom of the casing and at its outer produce and install, which is simple in structure end 'comes against the inner end of a bolt head and operation and in which parts entering into ‘I of conventional shape and form having an in the assembled structure are duplicated at both clined strike engaging side. The bolt is com sides of the door, this enhancing ‘economy of man 20 pleted by an elongated rod or stem 8 which passes ufacture. through the spring 6 and through an opening in The invention, its operation and results may the bottom of the casing 4, and extends into the be understood from the .following ‘description cylindrical opening 2 so as to lie partly across taken in connection with the accompanying draw the transverse opening 3 when the bolt ‘is in ings, in which, ‘ Fig. l is a horizontal section through the latch 25 outer position and ‘wholly across when the bolt is retracted. It is evident that normally, when ‘at the edge of a door at which the latch of my ‘free to do so, the "spring 6 moves the latch bolt invention is installed, showing the installation of v‘to its outer projected position as shownin Figs. 1 the parts on the door. and 2. Said bolt adjacent its ‘inner end has an Fig. 2 is a vertical section between opposite front and rear sides of the door, showing the 30 axial opening of passages 9 therethrough as latch in side elevation. At each ‘side of the door in the installing, ‘an Fig. 3 is a vertical transverse section ‘substan es'cutcheon housing to pressed from sheet metal tially ‘on the .plane of line 3—-3 of Fig. .1 looking and ‘preferably of a circular outline is used, hav toward the free edge of ‘the door. Fig. '4 is an inside view ofthe latch structure 35 ing an inwardly extending annular ?ange II at its edges, and at .its central portion being pressed escutc'heon housing, between which and an in outwardly to provide a central raised section l2. side ;plate the major portion "of the latch mecha A door knob ‘I3 is associated with the escutcheon, nism is located, one of such structures being said knob at its inner end riding against the located at each side of a door. Fig. 5 is a view similar to Fig. 4 with them 40 outer face of the raised portion l2 and having the use of a screwdriver or like implement. shown. side plate removed. Fig. 6 is a view similar to Fig. ‘5 with other ' ' 'at'its inner end a centrally disposed pin M which passes ‘through a central opening in the part 12 and has riveted or otherwise permanently se parts removed and illustrating the escutcheo'n cured ‘at its inner end a ?at member [5, substan and knob assembly unit. Fig. '7 is a perspective view of such escutcheon 45 tially ‘of bell crank form, the outer end portions of each arm of ‘which carry each a short pin i=6 housing and knob assembly unit. . extending inwardly. It is evident that the knob Fig. 3 is a perspective view of the inside plate l3, the escutcheon housing, the bell crank mem cooperating with the escutcheon and upon which ber 15 and pins ‘I16 ‘may be assembled together operative parts of the latch ‘mechanisms is mount 50 and provide a unit of the structure as shown in ed, and Fig. 7. Fig. ‘9 is a perspective view of the latch bolt. The escutc‘heon housing at its inner side and Like reference characters refer to like parts within ‘the ?ange II is closed by a substantially in the di?erent ?gures of the drawings. flat plate [1. The plate I‘! has a horizontal slot The door I upon which the latch and lock of my invention is installed may be of any conven 55 I18 therein closed at both ends and extending 2,407,775 4 . across the center of the plate and located across bell crank arm 28 from its locked position as in the adjacent end of the transverse opening 3 through the door. At the outer side of the plate I ‘I a member I9 stamped from ?at metal is lo cated, which has two oppositely disposed arms 20 extending from its middle portion transverse ly of the slot I8 and two oppositely disposed longitudinal portions 2I and 22 which are located. generally at right angles to the, arms 20. The part 2| is guided through a rectangular opening in a tongue 23 struck from the plate I1 and turned at right angles thereto as shown in Figs. 3 Fig. 5 to its released position as in Fig. 4. As shown in Figs. 4 and 8 in addition to the and 8, serving as a guide for the movements of the member l9. ' , . An operating rod 24 is riveted to the member I9 adjacent its central portion and extendsv through the slot I 8 of the plate I'Lbeing enlarged between its ends as shown at 25 thus securing and holding the parts together but permitting a freedom of movement of the member I9 and said rod 212 in the direction of the length of the slot removal of a part of the ?ange I I of the escutch- . eon plate II] at 39, a notch 3| is cut in the ?ange at another predetermined point and the plate I'I provided with a projection 32 to ?t into said notch, this for the purpose of controlling the loca tion of the plate I1 and slot I8 and.v the member 59 at the outer side of the plate with reference to‘the operating bell crank I5. The latch construction described is simple and economical to produce. Outside of the latch bolt . and rods 24 and 26 substantially all metallic parts There are two of the described structures are stamped from sheet metal. The duplication 'of the mechanism at the inner and outer sides of the doors results in economy of manufacture. When completed the plate I ‘I is permanently joined to the escutcheon I0 so that each knob assembly is handled and installed as a single unit. The latch bolt and its spring projection are simple and economical in structure. The latch may be used, one at each side of the door and the rods 24 extend inwardly through the transverse open is not desirable, eliminating the rod 26 and its 18. installed on doors Where an inside locking'thereof ing 3 at each end thereof being received at their 25 bell crank operating arms 28 and 29, while the free inner ends in the transverse axial opening 9 application of the locking means is simple and ' made through the bolt 8, With the construction as described one at each easy and the locking means itself is of a simple ' economical structure. . side of the door and the assembled knob housing The invention is de?ned in the appended claims escutcheon plate It and inner plate I'I secured so and is to be considered comprehensive of all forms to the door by means of screws or other equivalent of structure coming within their scope. fastenings (Fig. 3), it is evident that on turning I claim: a knob I3 at either side of the door in either direc 1. A latch construction including a housing tion the associated member I9 will be moved lon adapted to be inserted in an opening made in gitudinally by reason of a pin IE on a bell crank wardly at the vertical edge of the door, a coiled I5 engaging against the outer edge of an arm spring within said housing, a latch bolt‘ having 2!! of member I9 as shown in Fig. 5, thereby mov a head normally projecting beyond the open end ing the rod 24 inwardly and causing the latch bolt of the housing and a stern connected to said to :be retracted against the spring 5. The knob at head passing through said spring and the bot either side of the door may be turned in either 40 tom of the housing, said stem at its inner end direction and such operations will follow because portion having a transverse opening there of the two‘pins I6 engaging one against each of through, an operating pin having a free end por-, the two arms 20. tion extending partly into said opening'at each There may be associated with. the latch struc side of the latch bolt stem, means for mounting ture as described a simple manually operable look each of said pins ‘for a longitudinal movement ing means. As shown in Fig. 8 the inside closure paralleling the axis of said bolt stem, said plate I‘! ‘of one of the assemblies has a rod 26 movement being in a direction to retract the diametrically slotted at 21 at its free end. Said bolt head and compress said spring, and manu rod ispassed through the plate vI'I adjacent an ally rockable means connected with each of said edge thereof and carries a bell crank having two pins for moving the same to retract the latch arms 28 and 2%, the former of which may be bolt on rocking either of said means in either moved between the positions indicated in Fig. 4 direction of rocking movement. and that shown in Fig. 5 in the former of which 2. A latch comprising, a spring actuated bolt, the adjacent member I9 is free to move while in said bolt having a head at its outer end and a the latter, as shown in Fig. 5, the end of the arm . stem extending therefrom, said stem having a 28 has been brought into the path of movement of transverse horizontal passage therethrough, said ‘ ‘one of the arms 2!! locking the associated member bolt being adapted to be installed in a horizontal I9 and other parts in connection therewith cylindrical opening bored between the sides of against movement. The arm 29 extends through said door at a free edge thereof, a‘housing adapt an opening as shown at 30 made in the ?ange ed to be secured at each side of the door, a plate I I so that the bell crank lock is readily operated at the inner side of each housing adapted to be to either position by manual manipulation, said located against a side of_ the door, each of'said arm 29 being freely accessible for such purpose.v plates having a horizontal slot therein, a pin In practice for example with a bathroom door, extending through each of said slots and at its it will be the inner assembly which is provided with the rod 26 and the bell crank lock and op— ’ inner end extending into the transverse passage through said bolt stem a‘ distance approximating erating means therefor, the rod 26 extending one-half the length of said passage, a member through the door and its slotted end 2‘! through to which each of said pins is connectedat its the outside plate I‘! and substantially flush and through an opening in the escutcheon plate III at 70 outer end slidably mounted at its outer ‘side to each of said plates, a knob adapted to be rocked the outer side of the door, with its slotted end about a horizontal axis in either direction substantially ?ush with said escutcheon housing mounted at the outer side of each of said hous Ii}. This exposes the slot at 21 so that in an ings, and a member secured to the inner end por emergency the slot may be engaged by a small tion of each knob within its associated housing screwdriver to turn the rod 26 and change the ‘ 75 in operative engagement with the ?rst men 2,407,775 tioned member for slidably moving it in a direc tion to retract the latch bolt upon rocking move ment imparted to either of said knobs in either direction. 3. A latch comprising a latch bolt having a cylindrical housing open at its outer end, a coiled spring within the housing, a latch bolt having a head adapted to project beyond the mounted at a free vertical edge of a door hav ing a head normally projecting beyond said free edge, said bolt being mounted for inward re traction, identical means adapted to be mount ed one at each side of the door including a plate having a longitudinal slot therein adapted to be located in parallelism to the direction of move ment of the latch bolt, said latch bolt having a transverse opening therethrough at its inner through the bottom of said housing, said stem 10 end portion, inwardly extending pins mounted one on each plate for slidable movement length at its inner end portion having a transverse wise of its slot, said pins at their inner ends opening therethrough, two identical assemblies entering the transverse opening through the each comprising an escutcheon housing, a plate latch bolt from opposite sides thereof, and man closing the inner side thereof, said plate having ually operable means associated and operatively a slot therein adapted to parallel the axis of connected with each of said pins for selectively said bolt stem, a ?at metal member located moving either of said pins lengthwise of the slot against the outer side of the plate and means for through which it passes to retract the latch bolt. guiding the member in sliding movements over 5. A latch construction including a housing said plate, a pin connected to each of said mem adapted to be inserted inwardly at the vertical bers extending through the slot in said plate, edge of a door, a coiled spring within said hous said pins being adapted to enter said passage ing, a latch bolt having a head normally pro through said bolt stem, a knob outside of the jecting beyond the open end of the housing and housing having a centrally disposed pin at its a stem connected to said head passing through inner end passing through said housing and said spring and the bottom of the housing, said rockable about a horizontal axis, a bell crank open end of the housing and a stem extending connected to the inner end of the last men tioned pin, additional pins one at the outer end of each arm of the bell crank, said slidable mem ber having oppositely extending arms against an edge of each of which arms one of the last mentioned pins bears, whereby when said assem blies are connected to opposite sides of a door and the latch bolt is mounted on the door be stem at its inner end portion having a trans verse opening therein, an operating pin having a free end portion extending partly into said open ing, means for mounting said pin having lon gitudinal movement paralleling the axis of said bolt stem, said movement being in a direction to retract the bolt head and compress said spring, and manually rockable means connected with said pin for moving the same to retract the tween the opposite sides thereof, the bolt may be retracted in rocking either knob in either 35 latch bolt on rocking said means in either direc direction. 4. A spring actuated latch bolt adapted to be tion of rocking movement. , HORACE E. FROST.