Патент USA US2406149код для вставки
Aug. 20, I946. ' ' J. a. JENNI 2,406,149 SCREW DRIVER Filed Feb. 17, 1944 , Jésse 5 Jé/I/U' ' WWW 15M?” , Patented Aug. 20, 1946v 2,406,149 UNITED STATES PATENT OFFICE 2,406,149 SCREW DRIVER Jesse B. Jenni, Festus, Mo. Application February 17, 1944, Serial No. 522,805 1 2 Claims. (Cl. 145-66) 2 This invention relates to new and useful im provements in tools and more particularly to a rack and gear operated tool for working in close quarters. The principal‘ object of the present invention is to provide a tool which can be operated by re ciprocatory movement of a rack against a gear, wherein the rack is rotatable so as to be engage able and disengageable with the gear, thus dis bar ea so that its teeth It! disengage from the teeth l5 of the gear II and the rack bar 9a can be pushed through the laterally disposed portion a of the housing without disturbing the gear II C21 and when the rack bar has been thus returned , to its starting position, it can be given a slight turn to mesh its teeth l0 with the teeth l5 of the gear it so that the tool I 3 will be rotated and the rack bar is again pulled. pensing with more complicated and expensive 10 While the foregoing speci?cation sets forth the rack disengaging means. invention in speci?c terms, it is to be understood Other objects and advantages of the invention that numerous changes in the shape, size and will become apparent to the reader of the follow materials may be resorted to without departing ing description. from the spirit and scope of the invention as In the drawing: 15 claimed hereinafter. Figure 1 is a perspective view. Having described the invention, what is Figure 2 is a top plan view with the cover re claimed as new is: moved. ' 1. A tool of the character described comprising Figure 3 is a section on the line 3-3 of Fig a housing, a gear in the housing, said housing ure 1. ' 20 having a guide portion having an opening there Referring to the drawing wherein like numerals in adjacent the periphery of said gear, through designate like parts, it can be seen that numeral which the teeth of the gear extend, a rack bar 5 denotes a gear housing consisting of a lower disposed through the guide portion and engaged , hollow body 6 and a cover plate ‘I, secured to the by said gear, a tool projecting from the gear, body 6 by screws or the like 8. The body 6 and 25 said rack bar being rotatable to engage or dis also the cover 1 has a laterally disposed portion a engage its teeth with the teeth of the gear, said having a passageway 9 therethrough and through guide portion and said rack bar being of non-cir this passageway is disposed an elongated bar 9a cular cross section to limit rotation of the rack having a rounded portion b and a substantially bar when disengaging from the gear. ‘ tapered portion 0 and in the latter are rack teeth 30 2. A tool comprising a housing, a gear en ID. The passageway 9 ?ares inwardly as at d. closed in the housing, a rotatable tool bit detach The housing 5 has a rounded portion in which ably journaled in said housing and detachably is located a gear ll having a square opening at connected to said gear, said tool bit constituting its center for receiving the squared end 12 of a the sole journaling means for said gear during screw driver or the like I3 which extends into the use of the device, a guide portion in said hous housing 5 through an opening 14 in the bottom ing adjacent the periphery of said gear, a rack of the housing section 6. The teeth l5 of the gear II are beveled as bar slidably and removably received in said guide portion and normally engaging the teeth shown in Figure 3 and obviously by rotating the of said gear, said rack bar being rotatable in said rack bar 9a by a handle 16 it has at one outer 40 guide portion to engage or disengage its teeth end, the teeth ll! of the rack bar can be disen from the teeth of the gear, said rack being of gaged from the teeth l5 of the gear II. oval shape in cross section and said guide por For instance, assuming that the rack bar 9a tion having rotation limiting surfaces cooperat has been pulled toward the mechanic to its full ing with said rack limiting rotation thereof est extent and it is desired to replace the rack 45 when disengaging said rack from said gear. bar to- repeat this pull without disturbing the tool l3. All that is necessary is to rock the rack ‘JESSE B. JENNI.