https://www.datamp.org/ Recently added patents en-us https://www.datamp.org/patents/displayPatent.php?id=81513&pn=228,763 Dynamo-Electrical Machine Patentee: Nathaniel S. Keith - New York NY Granted:1880-06-15
Manufactured by Electrical Engineering Co. - San Francisco, San Francisco County CA

Abstract: My improvements relate, primarily, to the forms and arrangements of parts of machines used for generating currents of electricity which embody field-of-force electro-magnets, between the poles of which are rotated cores of iron surrounded by coils of wire, which cores and coils associated are called armatures in which armature-coils and in the coils of the field-of-force electromagnets currents of electricity are generated by mutual induction. They are also applicable, in part, to machines using permanent magnets for the field-of-force. More specifically, my improvements are First, improved form of the pole-faces of the field-of-force magnets of dynamo-electric and of magneto-electric machines, and consequent change in the shape and dimensions of the spaces, called by some the fields-of-force, in which the armatures are rotated. Claim: In magneto-electric machines and dynamo-electric machines, magnet pole-faces which are arcs of circles greater than the circles described by rotating their armature as, and whose radii spring from centers removed from the centers of the axes of the armatures
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]]> https://www.datamp.org/patents/displayPatent.php?id=85299&pn=205,819 Improvements in Ratchet Spanners and the like Patentee: Granted:1925-01-01
Assigned to HIRSCH & MAYER - Stuttgart-Feuerbach Germany

ABSTRACT: "A tool handle in which may be inserted a spanner, screw-driver, screw-tap or drill comprises a handle shaft, a tool-carrying head pivoted to the shaft and a reversible ratchet mechanism mounted in the head. The head consists of two parts (c), (d) connected by a bolt (g) so as to be rotatable relatively to one another, the part (d) having a polygonal opening (r) in which the tool is secured by a spring- pressed ball (s) engaging a notch in the opening. The ratchet mechanism is mounted between the parts (c), (d) and consists of four pins (i), slidable in recesses in the part (d) and pressed upwardly by springs (k) so as to engage in recesses (o) in the part (c). A diametrically-slotted ring (h) is rotatable between the parts (c), (d) so that the slot allows only one diametral pair of pins to engage with the recesses in the member (c) at a time. The upper ends of the pins are so chamfered that one pair allows relative rotation of the parts (c), (d) in one direction and, the other pair in the opposite direction. The handle (a) can be secured in different inclined positions relative to the head portion by a spring-controlled bolt (e), the end of which engages with one of a series of recesses (f) in the member (c). In the arrangement shown in Fig. 3, a ratchet mechanism is also provided in the head (d') on the bent tool or extension shown." Patent application filed under a "firm name" rather than individual names. See also corresponding German patent DE-402,843. Features appearing to correspond to aspects of this design appear in ratchets distributed as "ALL-IN-ONE" by Emil Schwarz (Chicago). That set has been connected to U.S. 1,629,205, DE-425,020, etc.
This is one of 84,597 patents currently in the database at datamp.org

]]> https://www.datamp.org/patents/displayPatent.php?id=85298&pn=244,712 Wrench with head hinged on the shaft and with reversible ratchet mechanism Patentee: Granted:1926-06-10
Manufactured by Spezial - Werkzeugfabrik Feuerbach G.m.b.H. - Stuttgart-Feuerbach Germany
Assigned to Spezial - Werkzeugfabrik Feuerbach G.m.b.H. - Stuttgart-Feuerbach Germany

ABSTRACT: "The pawls of a reversible ratchet wrench are arranged in the head parallel to the axis of rotation in a circle round it and are provided on part of their circumference with teeth engaging teeth on the inner surface of an adjusting ring for the purpose of reversing the pawls. The pawls (f) are urged by springs (g) into engagement with notches (h) in the driver (b). Rotation of the pawls on their axes through 180 [degrees] for reversing the action of the wrench is effected by the adjusting ring (e) having internal toothed portions (k) engaging spaces (i) between teeth on the circumference of the pawls, the ends of the toothed sections (k) limiting the rotation of the ring. (The patent application is filed in the Company name, rather than naming an individual). ESPACENET identifies corresponding patents including German DE-425,020 and U.S. 1,629,500. An "ALL-IN-ONE" set distributed in the U.S. by Emil Schwarz (Chicago) has been identified as corresponding to these patents. Some features of the set appear to correspond to earlier German patent DE-402,483 and corresponding British patent GB-205,819.
This is one of 84,597 patents currently in the database at datamp.org

]]> https://www.datamp.org/patents/displayPatent.php?id=39413&pn=354,865 Pocket Rule Patentee: William H. Jones - Montreal QC Canada Granted:1886-12-21
Manufactured by Acme Rule Co. - Salisbury CT
Assigned to George Alexander Grey - Montreal QC Canada

Designed to be an inexpensive pocket rule that can be configured to be used as a square due to an additional hinge. Rule is drawing is shown as a 12", two fold rule with a additional hinge on one arm. Known examples are 24" two fold rule with a secondary hinge 4" from the center hinge. The center hinge has 180 degree angle markings in 5 degree increments and there are additional angle hash marks on one of the rule arms. The patent describes a locking mechanism or clip but that feature does not appear to be utilized on the production rule examples.
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]]> https://www.datamp.org/patents/displayPatent.php?id=12837&pn=262,341 Saw Handle Patentee: Emanuel Andrews - Williamsport PA Granted:1882-08-08

Clamping mechanism for compass type saws that allows the blade to be attached to the handle without having to shape the butt of the blade to any particular shape or configuration and allow the handle to be configured at any desired angle. Presuming the example in the photos is an example of this patent.
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