US2523158A - Door knocker - Google Patents

Description

J. sTARP DooR KNocKER FiledApl-il '7. 1949 sept. 19, 195o JNVENTOR. Jnlnn farlo vw-u Anya.

Patented Sept. 19, 1950 UNITED STATES PAT-.ENT 'OFFICE 2,523,158 y i DooRKNooKEn lJohn AStarp, `Cleveland Heights, Dho Application April 7, laia'seriai No.sacvs 1 claim. (o1. 11s- 172) Y A the upper threaded portion of the hollow block, ofthis application vis a door knocker mounted on Vvand is provided with la seat 22 against `which the a unique base plate forming a part thereof. transverse pin engages'and which limits the up- Myiinvention has for itsobject to provide an `ward movement 4of the plunger in the'cap and .-.lmpro-.vedeoor knocker which is particularly 4also in the hollow block.y u.

simple and economical in construction, and vThe plunger is provided with a knob 23,\which `highly efficient and durable in use; and to this is detachably threaded on the upper end of the end, it consists in the novel combinations and stem of the plunger.

means hereinafter set forth and claimed. It has been previously noted that the hollow In describing this invention, reference is had l0 bloc-k projects slightly below the bottom surface to the accompanying drawing in which like charof the base plate, so that when it is mounted on acters designate corresponding parts in all the the door or the like, the two lower screws used views. p to assist in holding it in place, and for which Figure l is a view in elevation of the base plate the two through holes 24 and 25 are provided ."A'Ihe'invention constituting the subject matter with the door knocker mounted therein. therein causes the hollow block to be firmly held against the surface of the door. When the plunger is given a quick stroke with the hand, According to my invention I emploi7 a base the end of the plunger contacting the upper surplate or support I made of cast metal, plastic or face of the upstanding portion in the hollow block other suitable material. In the base plate there imparts a knock that is very intense and free may be provided three recesses as at 2, 3 and 4. from rattle. The recess 4 is provided to accommodate a scratch The operation of the device is as follows: pad, while the recesses 2 and 3 are provided to The base plate with its assembled knocker receive and hold the number of a house or a suite therein is screwed in place 0n a 1001' 0I' the likeand the name of the occupant thereof. The When it is necessary `to use the knocker, the scratch pad may be held in place by means of the knob thereof is given a sharp stroke with the bolts and nuts 5 and 5, however, any other suithand which drives the plunger down in the holable practical means may be used. low block against the upstanding portion in the In the base plate there is removably mounted bottom thereof which imparts an intense sound. a hollow block 1 having a smooth blind bore 8 m When the hand is removed the C011 spring beine therein, in the bottom of which there is provided of the expansible type causes the plunger to a raised portion 9 against which the enlarged return to its initial position. Its upward movehead of the plunger strikes. The block is proi ment is limited by the seat in the cap. If the vided with an annular flange In, an upper spring becomes exhausted, a new Spring may be 4 threaded portion ll, and a lower threaded por- 35 easily inStalled by removing the knOb IOm the tion I2, that extends through the base plate and I plunger and the cap from the hollow block and slightly below the lower surface I3 of the base the transverse pin in the Stem 0f the plunger. plate. The hollow block is held in assembled rela- A new spring may then be installed and the parts tionship in the base plate by means of a speed assembled. nut I4 or the like that clamps the plate between 40 While I have shown and described a preferred the underside of the flange and the upper surarrangement, it will be readily understood that face of the speed nut. changes and modications therein may be found In the hollow block there is provided a plunger desirable or essential in meeting the various exi- I5 with a stem I6 and an enlarged head I1 gencies of use, and I desire to be understood as adapted to engage the raised portion 9 in the 45 reserving the right to make any and al1 such hollow block when manually knocked down therechanges or modications as may be found deagainst. On the stem of the plunger there is sirable or essential, in so far as the same may fall mounted a Washer I8 and a helical springfIQ. within the spirit and scope of the invention as In the stem there is provided a transverse removexpressed in the accompanying claim when ably ,mounted pin 20. The helical spring is disbroadly construed. posed between the pin and the washer. The Having thus described my invention, what I helical spring is of the expansible type and norclaim is: mally holds the plunger in the position shown in A door knocker, comprising, in combination, the sectional view in Figure 2. a hollow base member having a through open- A detachably mounted cap 2l is threaded on 55 ing therein intermediate its width and adjacent Figure 2 is a sectional View on line 2--2 in Fig. l.

one end thereof, a hollow cylindrical knocker member having a smooth internal bore therein, and an upstanding plunger engaging portion in the bottom thereof, and also having an upper externally threaded portion and a lower externally threaded portion, a flange between the aforesaid threaded portions, the lower portion mounted in the through opening in the base and positioned by the flange engaging the upper surface of the hollow base member so that the end of the lower threaded portion extends slightly below the bottom surface of the base member, a nut threaded onto the lower threaded portion and adapted to secure the knocker member in the base member, a plunger having a Vstem portion slidably mounted in the knocker member, a washer slidably mounted on the plunger stem and seated on the upper end of the knockerA member, a helical spring mounted on the plunger stem, its lower end seated on the upper surface of the washer, a transverse pin in the plunger stem, the upper end of the helical spring engaging the transverse pin, a cap having a through opening in the top thereof threadedly engaging the threaded knocker member, the transverse pin engaging the under surface of the cap, the pin adapted to limit the upward movement of the plunger when returned to initial position after being struck to produce a knock by the plunger engaging the upstanding portion in the bottom of the hollow cylindrical knocker member, and a knob on the upper end of the plunger stem adapted to receive a blow in producing a knock.

JOI-1N STARP.

REFERENCES CITED The following references are of record in the le of this patent:

UNITED STATES PATENTS Number Name Date 212,316 McGill Feb. 13, 1879 252,841 McGill Jan. 24, 1882 602,573 Coggeshall Apr. 19, 1898 2,046,868 Burke July 7, 1936 FOREIGN PATENTS Number Country Date 388.961 France June 15, 1908

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